./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem17_label04.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_302da1aa-3339-47e2-958b-a9c29e3de407/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_302da1aa-3339-47e2-958b-a9c29e3de407/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_302da1aa-3339-47e2-958b-a9c29e3de407/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_302da1aa-3339-47e2-958b-a9c29e3de407/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem17_label04.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_302da1aa-3339-47e2-958b-a9c29e3de407/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_302da1aa-3339-47e2-958b-a9c29e3de407/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 49e10e55e7f24ac0e1cc4811d9fd20f6e770a7f556bf19e67f8acc4167c82fd3 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 16:57:44,278 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 16:57:44,282 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 16:57:44,340 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 16:57:44,341 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 16:57:44,346 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 16:57:44,348 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 16:57:44,353 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 16:57:44,356 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 16:57:44,362 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 16:57:44,363 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 16:57:44,366 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 16:57:44,366 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 16:57:44,369 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 16:57:44,372 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 16:57:44,376 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 16:57:44,378 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 16:57:44,380 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 16:57:44,382 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 16:57:44,391 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 16:57:44,393 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 16:57:44,395 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 16:57:44,398 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 16:57:44,400 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 16:57:44,409 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 16:57:44,410 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 16:57:44,410 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 16:57:44,412 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 16:57:44,413 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 16:57:44,415 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 16:57:44,415 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 16:57:44,416 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 16:57:44,419 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 16:57:44,420 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 16:57:44,422 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 16:57:44,422 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 16:57:44,423 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 16:57:44,424 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 16:57:44,424 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 16:57:44,425 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 16:57:44,426 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 16:57:44,427 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_302da1aa-3339-47e2-958b-a9c29e3de407/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 16:57:44,470 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 16:57:44,471 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 16:57:44,472 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 16:57:44,472 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 16:57:44,473 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 16:57:44,473 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 16:57:44,473 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 16:57:44,474 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 16:57:44,474 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 16:57:44,474 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 16:57:44,475 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 16:57:44,476 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 16:57:44,476 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 16:57:44,476 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 16:57:44,476 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 16:57:44,477 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 16:57:44,477 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 16:57:44,477 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 16:57:44,478 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 16:57:44,478 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 16:57:44,478 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 16:57:44,479 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 16:57:44,479 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 16:57:44,479 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 16:57:44,479 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 16:57:44,480 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 16:57:44,481 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 16:57:44,482 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 16:57:44,482 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 16:57:44,482 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 16:57:44,482 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 16:57:44,483 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 16:57:44,483 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:57:44,483 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 16:57:44,484 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 16:57:44,484 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 16:57:44,484 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 16:57:44,484 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 16:57:44,485 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 16:57:44,485 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 16:57:44,485 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 16:57:44,485 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_302da1aa-3339-47e2-958b-a9c29e3de407/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_302da1aa-3339-47e2-958b-a9c29e3de407/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 49e10e55e7f24ac0e1cc4811d9fd20f6e770a7f556bf19e67f8acc4167c82fd3 [2021-11-23 16:57:44,765 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 16:57:44,791 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 16:57:44,795 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 16:57:44,796 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 16:57:44,797 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 16:57:44,798 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_302da1aa-3339-47e2-958b-a9c29e3de407/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/eca-rers2012/Problem17_label04.c [2021-11-23 16:57:44,873 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_302da1aa-3339-47e2-958b-a9c29e3de407/bin/utaipan-fb15Y9Yzbl/data/c52a502a0/b6aac3ce4e4f4ee7888a84e0eb3083cc/FLAG48b071a0f [2021-11-23 16:57:45,703 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 16:57:45,704 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_302da1aa-3339-47e2-958b-a9c29e3de407/sv-benchmarks/c/eca-rers2012/Problem17_label04.c [2021-11-23 16:57:45,738 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_302da1aa-3339-47e2-958b-a9c29e3de407/bin/utaipan-fb15Y9Yzbl/data/c52a502a0/b6aac3ce4e4f4ee7888a84e0eb3083cc/FLAG48b071a0f [2021-11-23 16:57:45,770 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_302da1aa-3339-47e2-958b-a9c29e3de407/bin/utaipan-fb15Y9Yzbl/data/c52a502a0/b6aac3ce4e4f4ee7888a84e0eb3083cc [2021-11-23 16:57:45,774 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 16:57:45,777 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 16:57:45,781 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 16:57:45,782 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 16:57:45,785 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 16:57:45,786 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:57:45" (1/1) ... [2021-11-23 16:57:45,788 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ad205a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:57:45, skipping insertion in model container [2021-11-23 16:57:45,789 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:57:45" (1/1) ... [2021-11-23 16:57:45,796 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 16:57:45,905 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 16:57:46,227 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_302da1aa-3339-47e2-958b-a9c29e3de407/sv-benchmarks/c/eca-rers2012/Problem17_label04.c[3138,3151] [2021-11-23 16:57:47,034 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:57:47,046 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 16:57:47,083 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_302da1aa-3339-47e2-958b-a9c29e3de407/sv-benchmarks/c/eca-rers2012/Problem17_label04.c[3138,3151] [2021-11-23 16:57:47,495 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:57:47,520 INFO L208 MainTranslator]: Completed translation [2021-11-23 16:57:47,520 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:57:47 WrapperNode [2021-11-23 16:57:47,520 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 16:57:47,522 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 16:57:47,522 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 16:57:47,523 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 16:57:47,532 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:57:47" (1/1) ... [2021-11-23 16:57:47,650 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:57:47" (1/1) ... [2021-11-23 16:57:47,993 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 2611 [2021-11-23 16:57:47,993 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 16:57:47,994 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 16:57:47,994 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 16:57:47,994 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 16:57:48,019 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:57:47" (1/1) ... [2021-11-23 16:57:48,020 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:57:47" (1/1) ... [2021-11-23 16:57:48,067 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:57:47" (1/1) ... [2021-11-23 16:57:48,068 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:57:47" (1/1) ... [2021-11-23 16:57:48,260 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:57:47" (1/1) ... [2021-11-23 16:57:48,290 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:57:47" (1/1) ... [2021-11-23 16:57:48,355 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:57:47" (1/1) ... [2021-11-23 16:57:48,424 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 16:57:48,426 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 16:57:48,426 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 16:57:48,426 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 16:57:48,427 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:57:47" (1/1) ... [2021-11-23 16:57:48,438 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:57:48,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_302da1aa-3339-47e2-958b-a9c29e3de407/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:57:48,466 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_302da1aa-3339-47e2-958b-a9c29e3de407/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 16:57:48,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_302da1aa-3339-47e2-958b-a9c29e3de407/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 16:57:48,511 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 16:57:48,512 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 16:57:48,512 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 16:57:48,512 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 16:57:48,588 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 16:57:48,590 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 16:57:52,605 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 16:57:52,666 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 16:57:52,691 INFO L158 Benchmark]: Toolchain (without parser) took 6913.06ms. Allocated memory was 123.7MB in the beginning and 335.5MB in the end (delta: 211.8MB). Free memory was 84.4MB in the beginning and 144.4MB in the end (delta: -60.0MB). Peak memory consumption was 164.2MB. Max. memory is 16.1GB. [2021-11-23 16:57:52,692 INFO L158 Benchmark]: CDTParser took 0.27ms. Allocated memory is still 123.7MB. Free memory is still 76.8MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 16:57:52,693 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1739.80ms. Allocated memory was 123.7MB in the beginning and 167.8MB in the end (delta: 44.0MB). Free memory was 84.4MB in the beginning and 67.4MB in the end (delta: 17.0MB). Peak memory consumption was 65.0MB. Max. memory is 16.1GB. [2021-11-23 16:57:52,693 INFO L158 Benchmark]: Boogie Procedure Inliner took 471.40ms. Allocated memory is still 167.8MB. Free memory was 67.4MB in the beginning and 88.8MB in the end (delta: -21.4MB). Peak memory consumption was 49.3MB. Max. memory is 16.1GB. [2021-11-23 16:57:52,695 INFO L158 Benchmark]: Boogie Preprocessor took 429.96ms. Allocated memory was 167.8MB in the beginning and 335.5MB in the end (delta: 167.8MB). Free memory was 88.8MB in the beginning and 233.1MB in the end (delta: -144.3MB). Peak memory consumption was 28.3MB. Max. memory is 16.1GB. [2021-11-23 16:57:52,695 INFO L158 Benchmark]: RCFGBuilder took 4263.41ms. Allocated memory is still 335.5MB. Free memory was 233.1MB in the beginning and 144.4MB in the end (delta: 88.7MB). Peak memory consumption was 101.3MB. Max. memory is 16.1GB. [2021-11-23 16:57:52,700 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27ms. Allocated memory is still 123.7MB. Free memory is still 76.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1739.80ms. Allocated memory was 123.7MB in the beginning and 167.8MB in the end (delta: 44.0MB). Free memory was 84.4MB in the beginning and 67.4MB in the end (delta: 17.0MB). Peak memory consumption was 65.0MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 471.40ms. Allocated memory is still 167.8MB. Free memory was 67.4MB in the beginning and 88.8MB in the end (delta: -21.4MB). Peak memory consumption was 49.3MB. Max. memory is 16.1GB. * Boogie Preprocessor took 429.96ms. Allocated memory was 167.8MB in the beginning and 335.5MB in the end (delta: 167.8MB). Free memory was 88.8MB in the beginning and 233.1MB in the end (delta: -144.3MB). Peak memory consumption was 28.3MB. Max. memory is 16.1GB. * RCFGBuilder took 4263.41ms. Allocated memory is still 335.5MB. Free memory was 233.1MB in the beginning and 144.4MB in the end (delta: 88.7MB). Peak memory consumption was 101.3MB. 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 16:57:52,744 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_302da1aa-3339-47e2-958b-a9c29e3de407/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_302da1aa-3339-47e2-958b-a9c29e3de407/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_302da1aa-3339-47e2-958b-a9c29e3de407/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_302da1aa-3339-47e2-958b-a9c29e3de407/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_302da1aa-3339-47e2-958b-a9c29e3de407/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem17_label04.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_302da1aa-3339-47e2-958b-a9c29e3de407/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_302da1aa-3339-47e2-958b-a9c29e3de407/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 49e10e55e7f24ac0e1cc4811d9fd20f6e770a7f556bf19e67f8acc4167c82fd3 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 16:57:55,547 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 16:57:55,550 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 16:57:55,603 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 16:57:55,603 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 16:57:55,608 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 16:57:55,610 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 16:57:55,614 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 16:57:55,617 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 16:57:55,625 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 16:57:55,627 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 16:57:55,629 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 16:57:55,630 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 16:57:55,632 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 16:57:55,634 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 16:57:55,639 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 16:57:55,641 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 16:57:55,642 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 16:57:55,644 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 16:57:55,652 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 16:57:55,654 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 16:57:55,656 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 16:57:55,659 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 16:57:55,661 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 16:57:55,670 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 16:57:55,670 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 16:57:55,671 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 16:57:55,673 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 16:57:55,674 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 16:57:55,676 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 16:57:55,676 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 16:57:55,677 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 16:57:55,680 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 16:57:55,680 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 16:57:55,682 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 16:57:55,683 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 16:57:55,684 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 16:57:55,684 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 16:57:55,684 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 16:57:55,686 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 16:57:55,687 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 16:57:55,688 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_302da1aa-3339-47e2-958b-a9c29e3de407/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 16:57:55,731 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 16:57:55,731 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 16:57:55,732 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 16:57:55,732 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 16:57:55,733 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 16:57:55,734 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 16:57:55,734 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 16:57:55,734 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 16:57:55,735 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 16:57:55,735 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 16:57:55,736 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 16:57:55,736 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 16:57:55,738 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 16:57:55,738 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 16:57:55,739 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 16:57:55,739 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 16:57:55,739 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 16:57:55,739 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 16:57:55,740 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 16:57:55,740 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 16:57:55,740 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 16:57:55,741 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 16:57:55,741 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 16:57:55,741 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 16:57:55,741 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 16:57:55,742 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 16:57:55,742 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 16:57:55,742 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 16:57:55,743 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 16:57:55,743 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:57:55,743 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 16:57:55,743 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 16:57:55,744 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 16:57:55,745 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 16:57:55,755 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 16:57:55,756 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 16:57:55,756 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 16:57:55,757 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 16:57:55,757 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_302da1aa-3339-47e2-958b-a9c29e3de407/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_302da1aa-3339-47e2-958b-a9c29e3de407/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 49e10e55e7f24ac0e1cc4811d9fd20f6e770a7f556bf19e67f8acc4167c82fd3 [2021-11-23 16:57:56,143 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 16:57:56,165 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 16:57:56,168 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 16:57:56,169 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 16:57:56,170 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 16:57:56,171 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_302da1aa-3339-47e2-958b-a9c29e3de407/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/eca-rers2012/Problem17_label04.c [2021-11-23 16:57:56,236 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_302da1aa-3339-47e2-958b-a9c29e3de407/bin/utaipan-fb15Y9Yzbl/data/dbc15804d/67eb4529a18f4169899e9f2e366637e6/FLAGa7b5dbdd5 [2021-11-23 16:57:56,975 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 16:57:56,975 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_302da1aa-3339-47e2-958b-a9c29e3de407/sv-benchmarks/c/eca-rers2012/Problem17_label04.c [2021-11-23 16:57:57,004 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_302da1aa-3339-47e2-958b-a9c29e3de407/bin/utaipan-fb15Y9Yzbl/data/dbc15804d/67eb4529a18f4169899e9f2e366637e6/FLAGa7b5dbdd5 [2021-11-23 16:57:57,073 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_302da1aa-3339-47e2-958b-a9c29e3de407/bin/utaipan-fb15Y9Yzbl/data/dbc15804d/67eb4529a18f4169899e9f2e366637e6 [2021-11-23 16:57:57,077 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 16:57:57,080 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 16:57:57,083 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 16:57:57,083 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 16:57:57,087 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 16:57:57,089 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:57:57" (1/1) ... [2021-11-23 16:57:57,091 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a6c6233 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:57:57, skipping insertion in model container [2021-11-23 16:57:57,091 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:57:57" (1/1) ... [2021-11-23 16:57:57,099 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 16:57:57,211 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 16:57:57,545 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_302da1aa-3339-47e2-958b-a9c29e3de407/sv-benchmarks/c/eca-rers2012/Problem17_label04.c[3138,3151] [2021-11-23 16:57:58,403 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:57:58,415 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 16:57:58,448 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_302da1aa-3339-47e2-958b-a9c29e3de407/sv-benchmarks/c/eca-rers2012/Problem17_label04.c[3138,3151] [2021-11-23 16:57:58,944 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:57:58,966 INFO L208 MainTranslator]: Completed translation [2021-11-23 16:57:58,966 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:57:58 WrapperNode [2021-11-23 16:57:58,967 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 16:57:58,968 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 16:57:58,968 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 16:57:58,968 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 16:57:58,976 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:57:58" (1/1) ... [2021-11-23 16:57:59,041 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:57:58" (1/1) ... [2021-11-23 16:57:59,239 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 2608 [2021-11-23 16:57:59,239 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 16:57:59,240 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 16:57:59,241 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 16:57:59,241 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 16:57:59,258 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:57:58" (1/1) ... [2021-11-23 16:57:59,259 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:57:58" (1/1) ... [2021-11-23 16:57:59,297 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:57:58" (1/1) ... [2021-11-23 16:57:59,298 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:57:58" (1/1) ... [2021-11-23 16:57:59,376 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:57:58" (1/1) ... [2021-11-23 16:57:59,399 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:57:58" (1/1) ... [2021-11-23 16:57:59,426 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:57:58" (1/1) ... [2021-11-23 16:57:59,456 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 16:57:59,457 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 16:57:59,457 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 16:57:59,457 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 16:57:59,458 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:57:58" (1/1) ... [2021-11-23 16:57:59,466 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:57:59,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_302da1aa-3339-47e2-958b-a9c29e3de407/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:57:59,506 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_302da1aa-3339-47e2-958b-a9c29e3de407/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 16:57:59,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_302da1aa-3339-47e2-958b-a9c29e3de407/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 16:57:59,563 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 16:57:59,564 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 16:57:59,564 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 16:57:59,600 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 16:57:59,687 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 16:57:59,689 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 16:58:32,699 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 16:58:32,733 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 16:58:32,735 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 16:58:32,739 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:58:32 BoogieIcfgContainer [2021-11-23 16:58:32,739 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 16:58:32,742 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 16:58:32,742 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 16:58:32,746 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 16:58:32,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 04:57:57" (1/3) ... [2021-11-23 16:58:32,748 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33fdd246 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:58:32, skipping insertion in model container [2021-11-23 16:58:32,748 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:57:58" (2/3) ... [2021-11-23 16:58:32,748 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33fdd246 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:58:32, skipping insertion in model container [2021-11-23 16:58:32,749 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:58:32" (3/3) ... [2021-11-23 16:58:32,750 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label04.c [2021-11-23 16:58:32,760 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 16:58:32,760 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 16:58:32,833 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 16:58:32,840 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 16:58:32,840 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 16:58:32,873 INFO L276 IsEmpty]: Start isEmpty. Operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 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 16:58:32,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-23 16:58:32,879 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:58:32,879 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:58:32,880 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:58:32,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:58:32,885 INFO L85 PathProgramCache]: Analyzing trace with hash -279853278, now seen corresponding path program 1 times [2021-11-23 16:58:32,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:58:32,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [924761334] [2021-11-23 16:58:32,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:58:32,897 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:58:32,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_302da1aa-3339-47e2-958b-a9c29e3de407/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:58:32,898 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_302da1aa-3339-47e2-958b-a9c29e3de407/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:58:32,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_302da1aa-3339-47e2-958b-a9c29e3de407/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 16:58:32,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:58:32,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:58:32,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:58:33,121 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 16:58:33,121 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:58:33,122 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:58:33,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [924761334] [2021-11-23 16:58:33,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [924761334] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:58:33,123 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:58:33,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 16:58:33,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575542682] [2021-11-23 16:58:33,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:58:33,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:58:33,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:58:33,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:58:33,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:58:33,189 INFO L87 Difference]: Start difference. First operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 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 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 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 16:59:14,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:59:14,489 INFO L93 Difference]: Finished difference Result 1641 states and 3026 transitions. [2021-11-23 16:59:14,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:59:14,492 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 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 20 [2021-11-23 16:59:14,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:59:14,529 INFO L225 Difference]: With dead ends: 1641 [2021-11-23 16:59:14,530 INFO L226 Difference]: Without dead ends: 974 [2021-11-23 16:59:14,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 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 16:59:14,565 INFO L933 BasicCegarLoop]: 424 mSDtfsCounter, 465 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 1499 mSolverCounterSat, 292 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 465 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 1791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 292 IncrementalHoareTripleChecker+Valid, 1499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 41.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:59:14,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [465 Valid, 502 Invalid, 1791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [292 Valid, 1499 Invalid, 0 Unknown, 0 Unchecked, 41.1s Time] [2021-11-23 16:59:14,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 974 states. [2021-11-23 16:59:14,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 974 to 965. [2021-11-23 16:59:14,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 965 states, 964 states have (on average 1.553941908713693) internal successors, (1498), 964 states have internal predecessors, (1498), 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 16:59:14,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 965 states to 965 states and 1498 transitions. [2021-11-23 16:59:14,677 INFO L78 Accepts]: Start accepts. Automaton has 965 states and 1498 transitions. Word has length 20 [2021-11-23 16:59:14,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:59:14,677 INFO L470 AbstractCegarLoop]: Abstraction has 965 states and 1498 transitions. [2021-11-23 16:59:14,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 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 16:59:14,678 INFO L276 IsEmpty]: Start isEmpty. Operand 965 states and 1498 transitions. [2021-11-23 16:59:14,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-23 16:59:14,682 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:59:14,682 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 16:59:14,694 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_302da1aa-3339-47e2-958b-a9c29e3de407/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 16:59:14,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_302da1aa-3339-47e2-958b-a9c29e3de407/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:59:14,893 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:59:14,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:59:14,894 INFO L85 PathProgramCache]: Analyzing trace with hash -560555142, now seen corresponding path program 1 times [2021-11-23 16:59:14,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:59:14,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1431663255] [2021-11-23 16:59:14,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:59:14,897 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:59:14,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_302da1aa-3339-47e2-958b-a9c29e3de407/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:59:14,899 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_302da1aa-3339-47e2-958b-a9c29e3de407/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:59:14,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_302da1aa-3339-47e2-958b-a9c29e3de407/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 16:59:15,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:59:15,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:59:15,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:59:15,418 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:59:15,418 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:59:15,419 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:59:15,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1431663255] [2021-11-23 16:59:15,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1431663255] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:59:15,419 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:59:15,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 16:59:15,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290056750] [2021-11-23 16:59:15,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:59:15,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:59:15,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:59:15,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:59:15,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:59:15,423 INFO L87 Difference]: Start difference. First operand 965 states and 1498 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 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 16:59:49,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:59:49,490 INFO L93 Difference]: Finished difference Result 2356 states and 3779 transitions. [2021-11-23 16:59:49,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:59:49,491 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 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 87 [2021-11-23 16:59:49,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:59:49,502 INFO L225 Difference]: With dead ends: 2356 [2021-11-23 16:59:49,502 INFO L226 Difference]: Without dead ends: 1393 [2021-11-23 16:59:49,505 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 85 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 16:59:49,506 INFO L933 BasicCegarLoop]: 515 mSDtfsCounter, 392 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 392 SdHoareTripleChecker+Valid, 590 SdHoareTripleChecker+Invalid, 1629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 548 IncrementalHoareTripleChecker+Valid, 1081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 34.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:59:49,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [392 Valid, 590 Invalid, 1629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [548 Valid, 1081 Invalid, 0 Unknown, 0 Unchecked, 34.0s Time] [2021-11-23 16:59:49,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1393 states. [2021-11-23 16:59:49,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1393 to 1393. [2021-11-23 16:59:49,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1393 states, 1392 states have (on average 1.3038793103448276) internal successors, (1815), 1392 states have internal predecessors, (1815), 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 16:59:49,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1393 states to 1393 states and 1815 transitions. [2021-11-23 16:59:49,570 INFO L78 Accepts]: Start accepts. Automaton has 1393 states and 1815 transitions. Word has length 87 [2021-11-23 16:59:49,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:59:49,571 INFO L470 AbstractCegarLoop]: Abstraction has 1393 states and 1815 transitions. [2021-11-23 16:59:49,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 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 16:59:49,572 INFO L276 IsEmpty]: Start isEmpty. Operand 1393 states and 1815 transitions. [2021-11-23 16:59:49,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-23 16:59:49,575 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:59:49,576 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 16:59:49,595 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_302da1aa-3339-47e2-958b-a9c29e3de407/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 16:59:49,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_302da1aa-3339-47e2-958b-a9c29e3de407/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:59:49,790 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:59:49,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:59:49,790 INFO L85 PathProgramCache]: Analyzing trace with hash 405382798, now seen corresponding path program 1 times [2021-11-23 16:59:49,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:59:49,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2056176607] [2021-11-23 16:59:49,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:59:49,793 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:59:49,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_302da1aa-3339-47e2-958b-a9c29e3de407/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:59:49,794 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_302da1aa-3339-47e2-958b-a9c29e3de407/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:59:49,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_302da1aa-3339-47e2-958b-a9c29e3de407/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 16:59:49,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:59:49,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 16:59:49,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:59:50,336 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:59:50,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:59:55,803 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:59:55,803 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:59:55,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2056176607] [2021-11-23 16:59:55,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2056176607] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:59:55,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [774318462] [2021-11-23 16:59:55,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:59:55,805 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:59:55,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_302da1aa-3339-47e2-958b-a9c29e3de407/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:59:55,809 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_302da1aa-3339-47e2-958b-a9c29e3de407/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:59:55,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_302da1aa-3339-47e2-958b-a9c29e3de407/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-11-23 16:59:56,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:59:56,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 16:59:56,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:59:56,823 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:59:56,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:59:57,468 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:59:57,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [774318462] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 16:59:57,469 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-23 16:59:57,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3, 3] total 9 [2021-11-23 16:59:57,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991774969] [2021-11-23 16:59:57,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:59:57,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:59:57,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:59:57,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:59:57,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-23 16:59:57,472 INFO L87 Difference]: Start difference. First operand 1393 states and 1815 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 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 17:01:02,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:01:02,513 INFO L93 Difference]: Finished difference Result 3224 states and 4432 transitions. [2021-11-23 17:01:02,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:01:02,517 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 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 90 [2021-11-23 17:01:02,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:01:02,532 INFO L225 Difference]: With dead ends: 3224 [2021-11-23 17:01:02,532 INFO L226 Difference]: Without dead ends: 2258 [2021-11-23 17:01:02,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 349 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:01:02,536 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 566 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1319 mSolverCounterSat, 514 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 58.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 566 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 1833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 514 IncrementalHoareTripleChecker+Valid, 1319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 64.9s IncrementalHoareTripleChecker+Time [2021-11-23 17:01:02,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [566 Valid, 223 Invalid, 1833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [514 Valid, 1319 Invalid, 0 Unknown, 0 Unchecked, 64.9s Time] [2021-11-23 17:01:02,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2258 states. [2021-11-23 17:01:02,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2258 to 1831. [2021-11-23 17:01:02,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1831 states, 1830 states have (on average 1.3879781420765027) internal successors, (2540), 1830 states have internal predecessors, (2540), 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 17:01:02,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1831 states to 1831 states and 2540 transitions. [2021-11-23 17:01:02,590 INFO L78 Accepts]: Start accepts. Automaton has 1831 states and 2540 transitions. Word has length 90 [2021-11-23 17:01:02,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:01:02,590 INFO L470 AbstractCegarLoop]: Abstraction has 1831 states and 2540 transitions. [2021-11-23 17:01:02,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 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 17:01:02,591 INFO L276 IsEmpty]: Start isEmpty. Operand 1831 states and 2540 transitions. [2021-11-23 17:01:02,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-11-23 17:01:02,615 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:01:02,615 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 17:01:02,630 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_302da1aa-3339-47e2-958b-a9c29e3de407/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-23 17:01:02,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_302da1aa-3339-47e2-958b-a9c29e3de407/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2021-11-23 17:01:03,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_302da1aa-3339-47e2-958b-a9c29e3de407/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_302da1aa-3339-47e2-958b-a9c29e3de407/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:01:03,025 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:01:03,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:01:03,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1904524086, now seen corresponding path program 1 times [2021-11-23 17:01:03,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:01:03,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [352410919] [2021-11-23 17:01:03,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:01:03,036 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:01:03,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_302da1aa-3339-47e2-958b-a9c29e3de407/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:01:03,038 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_302da1aa-3339-47e2-958b-a9c29e3de407/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:01:03,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_302da1aa-3339-47e2-958b-a9c29e3de407/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 17:01:03,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:01:03,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:01:03,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:01:03,893 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 35 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:01:03,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:01:04,514 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:01:04,514 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:01:04,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [352410919] [2021-11-23 17:01:04,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [352410919] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 17:01:04,515 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 17:01:04,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-23 17:01:04,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982385247] [2021-11-23 17:01:04,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:01:04,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:01:04,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:01:04,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:01:04,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:01:04,518 INFO L87 Difference]: Start difference. First operand 1831 states and 2540 transitions. Second operand has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 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 17:01:33,255 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:02:09,680 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:02:12,853 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:02:16,221 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:02:21,322 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:02:37,934 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:02:43,897 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:02:57,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:02:57,091 INFO L93 Difference]: Finished difference Result 5370 states and 7455 transitions. [2021-11-23 17:02:57,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:02:57,095 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 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 170 [2021-11-23 17:02:57,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:02:57,115 INFO L225 Difference]: With dead ends: 5370 [2021-11-23 17:02:57,115 INFO L226 Difference]: Without dead ends: 3105 [2021-11-23 17:02:57,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 335 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:02:57,120 INFO L933 BasicCegarLoop]: 678 mSDtfsCounter, 500 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 1314 mSolverCounterSat, 495 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 105.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 500 SdHoareTripleChecker+Valid, 717 SdHoareTripleChecker+Invalid, 1809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 495 IncrementalHoareTripleChecker+Valid, 1314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 112.5s IncrementalHoareTripleChecker+Time [2021-11-23 17:02:57,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [500 Valid, 717 Invalid, 1809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [495 Valid, 1314 Invalid, 0 Unknown, 0 Unchecked, 112.5s Time] [2021-11-23 17:02:57,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3105 states. [2021-11-23 17:02:57,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3105 to 3100. [2021-11-23 17:02:57,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3100 states, 3099 states have (on average 1.2587931590835753) internal successors, (3901), 3099 states have internal predecessors, (3901), 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 17:02:57,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3100 states to 3100 states and 3901 transitions. [2021-11-23 17:02:57,209 INFO L78 Accepts]: Start accepts. Automaton has 3100 states and 3901 transitions. Word has length 170 [2021-11-23 17:02:57,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:02:57,210 INFO L470 AbstractCegarLoop]: Abstraction has 3100 states and 3901 transitions. [2021-11-23 17:02:57,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 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 17:02:57,210 INFO L276 IsEmpty]: Start isEmpty. Operand 3100 states and 3901 transitions. [2021-11-23 17:02:57,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-11-23 17:02:57,214 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:02:57,215 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:02:57,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_302da1aa-3339-47e2-958b-a9c29e3de407/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-23 17:02:57,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_302da1aa-3339-47e2-958b-a9c29e3de407/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:02:57,432 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:02:57,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:02:57,433 INFO L85 PathProgramCache]: Analyzing trace with hash -487366976, now seen corresponding path program 1 times [2021-11-23 17:02:57,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:02:57,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [644161833] [2021-11-23 17:02:57,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:02:57,435 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:02:57,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_302da1aa-3339-47e2-958b-a9c29e3de407/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:02:57,437 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_302da1aa-3339-47e2-958b-a9c29e3de407/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:02:57,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_302da1aa-3339-47e2-958b-a9c29e3de407/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 17:02:57,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:02:57,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:02:57,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:02:58,443 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 35 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:02:58,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:03:01,941 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 35 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:03:01,941 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:03:01,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [644161833] [2021-11-23 17:03:01,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [644161833] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:03:01,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1642406634] [2021-11-23 17:03:01,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:03:01,942 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:03:01,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_302da1aa-3339-47e2-958b-a9c29e3de407/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:03:01,945 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_302da1aa-3339-47e2-958b-a9c29e3de407/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:03:01,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_302da1aa-3339-47e2-958b-a9c29e3de407/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-23 17:03:02,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:03:02,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:03:02,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:02,957 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-23 17:03:02,958 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:03:02,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1642406634] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:03:02,958 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 17:03:02,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 3] total 8 [2021-11-23 17:03:02,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376008778] [2021-11-23 17:03:02,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:03:02,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:03:02,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:03:02,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:03:02,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:03:02,960 INFO L87 Difference]: Start difference. First operand 3100 states and 3901 transitions. Second operand has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 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 17:03:14,319 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:03:22,194 WARN L534 Checker$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 17:03:57,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:03:57,261 INFO L93 Difference]: Finished difference Result 11734 states and 14728 transitions. [2021-11-23 17:03:57,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 17:03:57,267 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 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 174 [2021-11-23 17:03:57,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:03:57,304 INFO L225 Difference]: With dead ends: 11734 [2021-11-23 17:03:57,304 INFO L226 Difference]: Without dead ends: 7773 [2021-11-23 17:03:57,309 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 521 GetRequests, 514 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:03:57,310 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 1348 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 1963 mSolverCounterSat, 779 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 47.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1348 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 2742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 779 IncrementalHoareTripleChecker+Valid, 1963 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 54.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:03:57,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1348 Valid, 140 Invalid, 2742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [779 Valid, 1963 Invalid, 0 Unknown, 0 Unchecked, 54.1s Time] [2021-11-23 17:03:57,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7773 states. [2021-11-23 17:03:57,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7773 to 5640. [2021-11-23 17:03:57,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5640 states, 5639 states have (on average 1.2399361588934208) internal successors, (6992), 5639 states have internal predecessors, (6992), 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 17:03:57,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5640 states to 5640 states and 6992 transitions. [2021-11-23 17:03:57,468 INFO L78 Accepts]: Start accepts. Automaton has 5640 states and 6992 transitions. Word has length 174 [2021-11-23 17:03:57,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:03:57,472 INFO L470 AbstractCegarLoop]: Abstraction has 5640 states and 6992 transitions. [2021-11-23 17:03:57,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 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 17:03:57,473 INFO L276 IsEmpty]: Start isEmpty. Operand 5640 states and 6992 transitions. [2021-11-23 17:03:57,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-11-23 17:03:57,488 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:03:57,488 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:03:57,500 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_302da1aa-3339-47e2-958b-a9c29e3de407/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-11-23 17:03:57,708 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_302da1aa-3339-47e2-958b-a9c29e3de407/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-23 17:03:57,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_302da1aa-3339-47e2-958b-a9c29e3de407/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_302da1aa-3339-47e2-958b-a9c29e3de407/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:03:57,898 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:03:57,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:03:57,899 INFO L85 PathProgramCache]: Analyzing trace with hash -927687506, now seen corresponding path program 1 times [2021-11-23 17:03:57,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:03:57,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [660951358] [2021-11-23 17:03:57,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:03:57,900 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:03:57,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_302da1aa-3339-47e2-958b-a9c29e3de407/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:03:57,902 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_302da1aa-3339-47e2-958b-a9c29e3de407/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:03:57,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_302da1aa-3339-47e2-958b-a9c29e3de407/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-23 17:03:58,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:03:58,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:03:58,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:58,478 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 117 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:03:58,478 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:03:58,478 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:03:58,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [660951358] [2021-11-23 17:03:58,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [660951358] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:03:58,478 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:03:58,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:03:58,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724905326] [2021-11-23 17:03:58,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:03:58,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:03:58,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:03:58,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:03:58,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:03:58,480 INFO L87 Difference]: Start difference. First operand 5640 states and 6992 transitions. Second operand has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:04:20,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:04:20,583 INFO L93 Difference]: Finished difference Result 14256 states and 18002 transitions. [2021-11-23 17:04:20,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:04:20,591 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 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 194 [2021-11-23 17:04:20,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:04:20,628 INFO L225 Difference]: With dead ends: 14256 [2021-11-23 17:04:20,628 INFO L226 Difference]: Without dead ends: 8618 [2021-11-23 17:04:20,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 192 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 17:04:20,634 INFO L933 BasicCegarLoop]: 674 mSDtfsCounter, 472 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1072 mSolverCounterSat, 284 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 721 SdHoareTripleChecker+Invalid, 1356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 284 IncrementalHoareTripleChecker+Valid, 1072 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:04:20,635 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [472 Valid, 721 Invalid, 1356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [284 Valid, 1072 Invalid, 0 Unknown, 0 Unchecked, 22.0s Time] [2021-11-23 17:04:20,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8618 states. [2021-11-23 17:04:20,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8618 to 6918. [2021-11-23 17:04:20,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6918 states, 6917 states have (on average 1.218447303744398) internal successors, (8428), 6917 states have internal predecessors, (8428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:04:20,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6918 states to 6918 states and 8428 transitions. [2021-11-23 17:04:20,863 INFO L78 Accepts]: Start accepts. Automaton has 6918 states and 8428 transitions. Word has length 194 [2021-11-23 17:04:20,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:04:20,864 INFO L470 AbstractCegarLoop]: Abstraction has 6918 states and 8428 transitions. [2021-11-23 17:04:20,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:04:20,865 INFO L276 IsEmpty]: Start isEmpty. Operand 6918 states and 8428 transitions. [2021-11-23 17:04:20,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2021-11-23 17:04:20,868 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:04:20,868 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:04:20,898 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_302da1aa-3339-47e2-958b-a9c29e3de407/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-23 17:04:21,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_302da1aa-3339-47e2-958b-a9c29e3de407/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:04:21,082 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:04:21,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:04:21,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1144979469, now seen corresponding path program 1 times [2021-11-23 17:04:21,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:04:21,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1616256813] [2021-11-23 17:04:21,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:04:21,085 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:04:21,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_302da1aa-3339-47e2-958b-a9c29e3de407/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:04:21,090 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_302da1aa-3339-47e2-958b-a9c29e3de407/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:04:21,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_302da1aa-3339-47e2-958b-a9c29e3de407/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-23 17:04:21,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:04:21,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:04:21,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:04:23,093 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 35 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:04:23,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:04:25,637 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 117 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:04:25,648 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:04:25,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1616256813] [2021-11-23 17:04:25,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1616256813] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 17:04:25,649 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 17:04:25,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-23 17:04:25,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992809982] [2021-11-23 17:04:25,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:04:25,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:04:25,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:04:25,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:04:25,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:04:25,651 INFO L87 Difference]: Start difference. First operand 6918 states and 8428 transitions. Second operand has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 3 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:04:37,179 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:04:45,816 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:04:59,424 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:05:06,243 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:05:14,047 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:05:19,968 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:05:29,480 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:05:41,318 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:05:48,180 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:05:49,984 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:06:03,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:06:03,188 INFO L93 Difference]: Finished difference Result 18940 states and 23092 transitions. [2021-11-23 17:06:03,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:06:03,195 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 3 states have internal predecessors, (202), 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 202 [2021-11-23 17:06:03,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:06:03,233 INFO L225 Difference]: With dead ends: 18940 [2021-11-23 17:06:03,234 INFO L226 Difference]: Without dead ends: 12024 [2021-11-23 17:06:03,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 399 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:06:03,242 INFO L933 BasicCegarLoop]: 168 mSDtfsCounter, 393 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 1209 mSolverCounterSat, 339 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 92.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 393 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 1549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 339 IncrementalHoareTripleChecker+Valid, 1209 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 97.4s IncrementalHoareTripleChecker+Time [2021-11-23 17:06:03,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [393 Valid, 191 Invalid, 1549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [339 Valid, 1209 Invalid, 1 Unknown, 0 Unchecked, 97.4s Time] [2021-11-23 17:06:03,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12024 states. [2021-11-23 17:06:03,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12024 to 10319. [2021-11-23 17:06:03,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10319 states, 10318 states have (on average 1.2420042643923241) internal successors, (12815), 10318 states have internal predecessors, (12815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:06:03,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10319 states to 10319 states and 12815 transitions. [2021-11-23 17:06:03,509 INFO L78 Accepts]: Start accepts. Automaton has 10319 states and 12815 transitions. Word has length 202 [2021-11-23 17:06:03,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:06:03,510 INFO L470 AbstractCegarLoop]: Abstraction has 10319 states and 12815 transitions. [2021-11-23 17:06:03,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 3 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:06:03,511 INFO L276 IsEmpty]: Start isEmpty. Operand 10319 states and 12815 transitions. [2021-11-23 17:06:03,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2021-11-23 17:06:03,519 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:06:03,519 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-23 17:06:03,538 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_302da1aa-3339-47e2-958b-a9c29e3de407/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-23 17:06:03,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_302da1aa-3339-47e2-958b-a9c29e3de407/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:06:03,738 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:06:03,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:06:03,739 INFO L85 PathProgramCache]: Analyzing trace with hash 971605686, now seen corresponding path program 1 times [2021-11-23 17:06:03,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:06:03,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1240458479] [2021-11-23 17:06:03,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:06:03,741 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:06:03,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_302da1aa-3339-47e2-958b-a9c29e3de407/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:06:03,742 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_302da1aa-3339-47e2-958b-a9c29e3de407/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:06:03,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_302da1aa-3339-47e2-958b-a9c29e3de407/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-23 17:06:04,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:06:04,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:06:04,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:06:05,030 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 216 proven. 82 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-23 17:06:05,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:06:09,082 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 216 proven. 82 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-23 17:06:09,082 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:06:09,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1240458479] [2021-11-23 17:06:09,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1240458479] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:06:09,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1972591357] [2021-11-23 17:06:09,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:06:09,083 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:06:09,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_302da1aa-3339-47e2-958b-a9c29e3de407/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:06:09,084 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_302da1aa-3339-47e2-958b-a9c29e3de407/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:06:09,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_302da1aa-3339-47e2-958b-a9c29e3de407/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-23 17:06:10,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:06:10,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:06:10,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:06:11,064 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 216 proven. 82 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-23 17:06:11,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:06:17,052 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 216 proven. 82 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-23 17:06:17,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1972591357] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:06:17,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325783216] [2021-11-23 17:06:17,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:06:17,053 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:06:17,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_302da1aa-3339-47e2-958b-a9c29e3de407/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:06:17,054 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_302da1aa-3339-47e2-958b-a9c29e3de407/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:06:17,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_302da1aa-3339-47e2-958b-a9c29e3de407/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-23 17:06:17,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:06:17,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:06:17,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:06:18,296 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 216 proven. 82 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-23 17:06:18,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:06:26,214 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 216 proven. 82 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-23 17:06:26,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325783216] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:06:26,214 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:06:26,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 8 [2021-11-23 17:06:26,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795323953] [2021-11-23 17:06:26,216 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:06:26,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 17:06:26,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:06:26,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 17:06:26,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:06:26,219 INFO L87 Difference]: Start difference. First operand 10319 states and 12815 transitions. Second operand has 9 states, 9 states have (on average 88.11111111111111) internal successors, (793), 8 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:06:37,230 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:07:30,120 WARN L534 Checker$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 17:07:39,404 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:08:02,429 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:08:11,396 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:08:28,817 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:08:59,807 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:11:01,544 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:11:30,347 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers []