./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pals_lcr.8.ufo.UNBOUNDED.pals+Problem12_label03.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_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/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_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pals_lcr.8.ufo.UNBOUNDED.pals+Problem12_label03.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/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_4b479a3e-f461-4afa-a2f3-a69ce268027b/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 5d6ca24940c3ee50144301bfe2ad5c39a9e1b17caba3dcee976fe158697f7f6f --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 16:45:32,678 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 16:45:32,680 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 16:45:32,709 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 16:45:32,710 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 16:45:32,712 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 16:45:32,714 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 16:45:32,716 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 16:45:32,719 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 16:45:32,720 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 16:45:32,722 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 16:45:32,723 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 16:45:32,724 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 16:45:32,725 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 16:45:32,727 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 16:45:32,729 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 16:45:32,730 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 16:45:32,731 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 16:45:32,733 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 16:45:32,736 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 16:45:32,738 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 16:45:32,739 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 16:45:32,741 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 16:45:32,742 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 16:45:32,746 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 16:45:32,747 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 16:45:32,747 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 16:45:32,748 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 16:45:32,749 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 16:45:32,750 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 16:45:32,750 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 16:45:32,752 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 16:45:32,753 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 16:45:32,754 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 16:45:32,755 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 16:45:32,756 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 16:45:32,757 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 16:45:32,757 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 16:45:32,757 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 16:45:32,759 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 16:45:32,760 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 16:45:32,761 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 16:45:32,784 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 16:45:32,785 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 16:45:32,785 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 16:45:32,785 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 16:45:32,786 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 16:45:32,786 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 16:45:32,786 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 16:45:32,787 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 16:45:32,787 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 16:45:32,787 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 16:45:32,787 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 16:45:32,787 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 16:45:32,788 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 16:45:32,788 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 16:45:32,788 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 16:45:32,788 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 16:45:32,789 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 16:45:32,789 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 16:45:32,790 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 16:45:32,790 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 16:45:32,790 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 16:45:32,790 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 16:45:32,791 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 16:45:32,791 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 16:45:32,791 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 16:45:32,791 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 16:45:32,791 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 16:45:32,792 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 16:45:32,792 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 16:45:32,792 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 16:45:32,792 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 16:45:32,793 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 16:45:32,793 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:45:32,793 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 16:45:32,793 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 16:45:32,794 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 16:45:32,794 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 16:45:32,794 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 16:45:32,794 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 16:45:32,794 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 16:45:32,795 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 16:45:32,795 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_4b479a3e-f461-4afa-a2f3-a69ce268027b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5d6ca24940c3ee50144301bfe2ad5c39a9e1b17caba3dcee976fe158697f7f6f [2021-11-23 16:45:33,037 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 16:45:33,077 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 16:45:33,079 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 16:45:33,081 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 16:45:33,082 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 16:45:33,083 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/combinations/pals_lcr.8.ufo.UNBOUNDED.pals+Problem12_label03.c [2021-11-23 16:45:33,153 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/data/ac4ef0cce/701e9d5f0a854eee8fd7d63bfc73c2d3/FLAG5a60f7f0a [2021-11-23 16:45:34,010 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 16:45:34,012 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/sv-benchmarks/c/combinations/pals_lcr.8.ufo.UNBOUNDED.pals+Problem12_label03.c [2021-11-23 16:45:34,049 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/data/ac4ef0cce/701e9d5f0a854eee8fd7d63bfc73c2d3/FLAG5a60f7f0a [2021-11-23 16:45:34,502 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/data/ac4ef0cce/701e9d5f0a854eee8fd7d63bfc73c2d3 [2021-11-23 16:45:34,508 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 16:45:34,509 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 16:45:34,517 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 16:45:34,517 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 16:45:34,521 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 16:45:34,522 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:45:34" (1/1) ... [2021-11-23 16:45:34,523 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d9655c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:34, skipping insertion in model container [2021-11-23 16:45:34,523 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:45:34" (1/1) ... [2021-11-23 16:45:34,530 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 16:45:34,669 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 16:45:35,180 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_4b479a3e-f461-4afa-a2f3-a69ce268027b/sv-benchmarks/c/combinations/pals_lcr.8.ufo.UNBOUNDED.pals+Problem12_label03.c[26888,26901] [2021-11-23 16:45:35,237 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_4b479a3e-f461-4afa-a2f3-a69ce268027b/sv-benchmarks/c/combinations/pals_lcr.8.ufo.UNBOUNDED.pals+Problem12_label03.c[29225,29238] [2021-11-23 16:45:36,108 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:45:36,127 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 16:45:36,195 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_4b479a3e-f461-4afa-a2f3-a69ce268027b/sv-benchmarks/c/combinations/pals_lcr.8.ufo.UNBOUNDED.pals+Problem12_label03.c[26888,26901] [2021-11-23 16:45:36,200 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_4b479a3e-f461-4afa-a2f3-a69ce268027b/sv-benchmarks/c/combinations/pals_lcr.8.ufo.UNBOUNDED.pals+Problem12_label03.c[29225,29238] [2021-11-23 16:45:36,860 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:45:36,903 INFO L208 MainTranslator]: Completed translation [2021-11-23 16:45:36,903 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:36 WrapperNode [2021-11-23 16:45:36,903 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 16:45:36,905 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 16:45:36,905 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 16:45:36,905 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 16:45:36,913 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:36" (1/1) ... [2021-11-23 16:45:36,977 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:36" (1/1) ... [2021-11-23 16:45:37,454 INFO L137 Inliner]: procedures = 40, calls = 25, calls flagged for inlining = 20, calls inlined = 20, statements flattened = 5279 [2021-11-23 16:45:37,469 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 16:45:37,469 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 16:45:37,470 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 16:45:37,470 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 16:45:37,479 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:36" (1/1) ... [2021-11-23 16:45:37,479 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:36" (1/1) ... [2021-11-23 16:45:37,647 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:36" (1/1) ... [2021-11-23 16:45:37,647 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:36" (1/1) ... [2021-11-23 16:45:37,904 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:36" (1/1) ... [2021-11-23 16:45:37,939 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:36" (1/1) ... [2021-11-23 16:45:37,962 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:36" (1/1) ... [2021-11-23 16:45:38,023 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 16:45:38,024 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 16:45:38,025 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 16:45:38,025 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 16:45:38,026 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:36" (1/1) ... [2021-11-23 16:45:38,034 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:45:38,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:45:38,060 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 16:45:38,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 16:45:38,098 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 16:45:38,099 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 16:45:38,099 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 16:45:38,099 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 16:45:38,225 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 16:45:38,226 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 16:45:43,210 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 16:45:43,281 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 16:45:43,292 INFO L158 Benchmark]: Toolchain (without parser) took 8780.46ms. Allocated memory was 92.3MB in the beginning and 501.2MB in the end (delta: 408.9MB). Free memory was 56.0MB in the beginning and 360.0MB in the end (delta: -304.0MB). Peak memory consumption was 262.4MB. Max. memory is 16.1GB. [2021-11-23 16:45:43,294 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 92.3MB. Free memory was 68.2MB in the beginning and 68.1MB in the end (delta: 54.1kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 16:45:43,296 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2387.12ms. Allocated memory was 92.3MB in the beginning and 136.3MB in the end (delta: 44.0MB). Free memory was 55.8MB in the beginning and 57.2MB in the end (delta: -1.4MB). Peak memory consumption was 43.8MB. Max. memory is 16.1GB. [2021-11-23 16:45:43,296 INFO L158 Benchmark]: Boogie Procedure Inliner took 564.10ms. Allocated memory is still 136.3MB. Free memory was 57.2MB in the beginning and 35.6MB in the end (delta: 21.6MB). Peak memory consumption was 48.8MB. Max. memory is 16.1GB. [2021-11-23 16:45:43,297 INFO L158 Benchmark]: Boogie Preprocessor took 554.17ms. Allocated memory was 136.3MB in the beginning and 272.6MB in the end (delta: 136.3MB). Free memory was 35.6MB in the beginning and 140.8MB in the end (delta: -105.3MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. [2021-11-23 16:45:43,299 INFO L158 Benchmark]: RCFGBuilder took 5264.71ms. Allocated memory was 272.6MB in the beginning and 501.2MB in the end (delta: 228.6MB). Free memory was 140.8MB in the beginning and 360.0MB in the end (delta: -219.2MB). Peak memory consumption was 167.8MB. Max. memory is 16.1GB. [2021-11-23 16:45:43,308 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 92.3MB. Free memory was 68.2MB in the beginning and 68.1MB in the end (delta: 54.1kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2387.12ms. Allocated memory was 92.3MB in the beginning and 136.3MB in the end (delta: 44.0MB). Free memory was 55.8MB in the beginning and 57.2MB in the end (delta: -1.4MB). Peak memory consumption was 43.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 564.10ms. Allocated memory is still 136.3MB. Free memory was 57.2MB in the beginning and 35.6MB in the end (delta: 21.6MB). Peak memory consumption was 48.8MB. Max. memory is 16.1GB. * Boogie Preprocessor took 554.17ms. Allocated memory was 136.3MB in the beginning and 272.6MB in the end (delta: 136.3MB). Free memory was 35.6MB in the beginning and 140.8MB in the end (delta: -105.3MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. * RCFGBuilder took 5264.71ms. Allocated memory was 272.6MB in the beginning and 501.2MB in the end (delta: 228.6MB). Free memory was 140.8MB in the beginning and 360.0MB in the end (delta: -219.2MB). Peak memory consumption was 167.8MB. 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 16:45:43,338 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/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_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/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_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pals_lcr.8.ufo.UNBOUNDED.pals+Problem12_label03.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/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_4b479a3e-f461-4afa-a2f3-a69ce268027b/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 5d6ca24940c3ee50144301bfe2ad5c39a9e1b17caba3dcee976fe158697f7f6f --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 16:45:45,811 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 16:45:45,813 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 16:45:45,858 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 16:45:45,859 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 16:45:45,863 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 16:45:45,865 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 16:45:45,869 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 16:45:45,872 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 16:45:45,881 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 16:45:45,882 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 16:45:45,884 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 16:45:45,884 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 16:45:45,886 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 16:45:45,887 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 16:45:45,888 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 16:45:45,889 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 16:45:45,890 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 16:45:45,892 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 16:45:45,894 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 16:45:45,896 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 16:45:45,901 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 16:45:45,903 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 16:45:45,905 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 16:45:45,909 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 16:45:45,913 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 16:45:45,913 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 16:45:45,915 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 16:45:45,916 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 16:45:45,917 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 16:45:45,918 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 16:45:45,919 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 16:45:45,921 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 16:45:45,922 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 16:45:45,924 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 16:45:45,924 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 16:45:45,925 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 16:45:45,926 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 16:45:45,926 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 16:45:45,928 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 16:45:45,928 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 16:45:45,933 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 16:45:45,987 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 16:45:45,987 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 16:45:45,988 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 16:45:45,988 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 16:45:45,989 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 16:45:45,989 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 16:45:45,989 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 16:45:45,990 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 16:45:45,991 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 16:45:45,991 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 16:45:45,992 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 16:45:45,992 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 16:45:45,994 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 16:45:45,994 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 16:45:45,994 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 16:45:45,994 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 16:45:45,995 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 16:45:45,995 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 16:45:45,995 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 16:45:45,995 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 16:45:45,996 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 16:45:45,996 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 16:45:45,996 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 16:45:45,996 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 16:45:45,996 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 16:45:45,997 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 16:45:45,997 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 16:45:45,997 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 16:45:45,997 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 16:45:45,998 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:45:45,998 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 16:45:45,998 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 16:45:45,999 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 16:45:45,999 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 16:45:45,999 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 16:45:45,999 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 16:45:45,999 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 16:45:46,000 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 16:45:46,000 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_4b479a3e-f461-4afa-a2f3-a69ce268027b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5d6ca24940c3ee50144301bfe2ad5c39a9e1b17caba3dcee976fe158697f7f6f [2021-11-23 16:45:46,412 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 16:45:46,434 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 16:45:46,437 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 16:45:46,438 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 16:45:46,439 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 16:45:46,441 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/combinations/pals_lcr.8.ufo.UNBOUNDED.pals+Problem12_label03.c [2021-11-23 16:45:46,505 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/data/4b7bddcd8/3de9b149d11e476b83e52085af55929c/FLAG1c4d34174 [2021-11-23 16:45:47,421 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 16:45:47,422 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/sv-benchmarks/c/combinations/pals_lcr.8.ufo.UNBOUNDED.pals+Problem12_label03.c [2021-11-23 16:45:47,456 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/data/4b7bddcd8/3de9b149d11e476b83e52085af55929c/FLAG1c4d34174 [2021-11-23 16:45:47,891 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/data/4b7bddcd8/3de9b149d11e476b83e52085af55929c [2021-11-23 16:45:47,894 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 16:45:47,895 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 16:45:47,897 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 16:45:47,897 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 16:45:47,901 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 16:45:47,903 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:45:47" (1/1) ... [2021-11-23 16:45:47,904 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e03111b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:47, skipping insertion in model container [2021-11-23 16:45:47,904 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:45:47" (1/1) ... [2021-11-23 16:45:47,911 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 16:45:48,092 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 16:45:48,577 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_4b479a3e-f461-4afa-a2f3-a69ce268027b/sv-benchmarks/c/combinations/pals_lcr.8.ufo.UNBOUNDED.pals+Problem12_label03.c[26888,26901] [2021-11-23 16:45:48,610 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_4b479a3e-f461-4afa-a2f3-a69ce268027b/sv-benchmarks/c/combinations/pals_lcr.8.ufo.UNBOUNDED.pals+Problem12_label03.c[29225,29238] [2021-11-23 16:45:49,664 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:45:49,680 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 16:45:49,750 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_4b479a3e-f461-4afa-a2f3-a69ce268027b/sv-benchmarks/c/combinations/pals_lcr.8.ufo.UNBOUNDED.pals+Problem12_label03.c[26888,26901] [2021-11-23 16:45:49,755 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_4b479a3e-f461-4afa-a2f3-a69ce268027b/sv-benchmarks/c/combinations/pals_lcr.8.ufo.UNBOUNDED.pals+Problem12_label03.c[29225,29238] [2021-11-23 16:45:50,416 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:45:50,450 INFO L208 MainTranslator]: Completed translation [2021-11-23 16:45:50,450 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:50 WrapperNode [2021-11-23 16:45:50,450 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 16:45:50,452 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 16:45:50,452 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 16:45:50,452 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 16:45:50,460 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:50" (1/1) ... [2021-11-23 16:45:50,540 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:50" (1/1) ... [2021-11-23 16:45:50,784 INFO L137 Inliner]: procedures = 41, calls = 25, calls flagged for inlining = 20, calls inlined = 20, statements flattened = 5246 [2021-11-23 16:45:50,785 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 16:45:50,786 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 16:45:50,787 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 16:45:50,787 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 16:45:50,798 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:50" (1/1) ... [2021-11-23 16:45:50,799 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:50" (1/1) ... [2021-11-23 16:45:50,841 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:50" (1/1) ... [2021-11-23 16:45:50,853 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:50" (1/1) ... [2021-11-23 16:45:51,070 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:50" (1/1) ... [2021-11-23 16:45:51,138 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:50" (1/1) ... [2021-11-23 16:45:51,169 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:50" (1/1) ... [2021-11-23 16:45:51,211 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 16:45:51,212 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 16:45:51,212 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 16:45:51,213 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 16:45:51,213 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:50" (1/1) ... [2021-11-23 16:45:51,249 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:45:51,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:45:51,302 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 16:45:51,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 16:45:51,405 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 16:45:51,406 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 16:45:51,406 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 16:45:51,406 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 16:45:51,640 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 16:45:51,641 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 16:46:22,907 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 16:46:22,937 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 16:46:22,938 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-23 16:46:22,943 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:46:22 BoogieIcfgContainer [2021-11-23 16:46:22,943 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 16:46:22,950 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 16:46:22,951 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 16:46:22,954 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 16:46:22,956 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 04:45:47" (1/3) ... [2021-11-23 16:46:22,957 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6acd001c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:46:22, skipping insertion in model container [2021-11-23 16:46:22,957 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:50" (2/3) ... [2021-11-23 16:46:22,958 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6acd001c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:46:22, skipping insertion in model container [2021-11-23 16:46:22,958 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:46:22" (3/3) ... [2021-11-23 16:46:22,962 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.8.ufo.UNBOUNDED.pals+Problem12_label03.c [2021-11-23 16:46:22,969 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 16:46:22,970 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-23 16:46:23,043 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 16:46:23,053 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 16:46:23,053 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-23 16:46:23,119 INFO L276 IsEmpty]: Start isEmpty. Operand has 965 states, 962 states have (on average 1.8960498960498962) internal successors, (1824), 964 states have internal predecessors, (1824), 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 16:46:23,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-23 16:46:23,131 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:46:23,132 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 16:46:23,133 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:46:23,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:46:23,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1284493701, now seen corresponding path program 1 times [2021-11-23 16:46:23,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:46:23,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1680451035] [2021-11-23 16:46:23,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:46:23,166 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:46:23,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:46:23,167 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:46:23,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 16:46:23,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:46:23,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:46:23,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:46:23,645 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 16:46:23,645 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:46:23,646 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:46:23,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1680451035] [2021-11-23 16:46:23,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1680451035] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:46:23,647 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:46:23,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 16:46:23,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288218343] [2021-11-23 16:46:23,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:46:23,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:46:23,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:46:23,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:46:23,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:46:23,702 INFO L87 Difference]: Start difference. First operand has 965 states, 962 states have (on average 1.8960498960498962) internal successors, (1824), 964 states have internal predecessors, (1824), 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 16:47:03,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:47:03,055 INFO L93 Difference]: Finished difference Result 2632 states and 5034 transitions. [2021-11-23 16:47:03,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:47:03,058 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 16:47:03,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:47:03,096 INFO L225 Difference]: With dead ends: 2632 [2021-11-23 16:47:03,096 INFO L226 Difference]: Without dead ends: 1650 [2021-11-23 16:47:03,105 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 16:47:03,108 INFO L933 BasicCegarLoop]: 768 mSDtfsCounter, 1053 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 2479 mSolverCounterSat, 500 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1053 SdHoareTripleChecker+Valid, 779 SdHoareTripleChecker+Invalid, 2979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 500 IncrementalHoareTripleChecker+Valid, 2479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 39.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:47:03,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1053 Valid, 779 Invalid, 2979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [500 Valid, 2479 Invalid, 0 Unknown, 0 Unchecked, 39.1s Time] [2021-11-23 16:47:03,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1650 states. [2021-11-23 16:47:03,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1650 to 1650. [2021-11-23 16:47:03,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1650 states, 1648 states have (on average 1.6201456310679612) internal successors, (2670), 1649 states have internal predecessors, (2670), 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 16:47:03,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1650 states to 1650 states and 2670 transitions. [2021-11-23 16:47:03,250 INFO L78 Accepts]: Start accepts. Automaton has 1650 states and 2670 transitions. Word has length 20 [2021-11-23 16:47:03,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:47:03,250 INFO L470 AbstractCegarLoop]: Abstraction has 1650 states and 2670 transitions. [2021-11-23 16:47:03,251 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 16:47:03,252 INFO L276 IsEmpty]: Start isEmpty. Operand 1650 states and 2670 transitions. [2021-11-23 16:47:03,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-23 16:47:03,262 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:47:03,262 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:47:03,283 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-23 16:47:03,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:47:03,479 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:47:03,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:47:03,480 INFO L85 PathProgramCache]: Analyzing trace with hash 2117945689, now seen corresponding path program 1 times [2021-11-23 16:47:03,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:47:03,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1873651188] [2021-11-23 16:47:03,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:47:03,482 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:47:03,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:47:03,485 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:47:03,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 16:47:03,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:47:03,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 16:47:03,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:47:03,831 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 16:47:03,832 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:47:03,832 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:47:03,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1873651188] [2021-11-23 16:47:03,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1873651188] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:47:03,833 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:47:03,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 16:47:03,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091134717] [2021-11-23 16:47:03,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:47:03,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 16:47:03,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:47:03,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 16:47:03,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:47:03,836 INFO L87 Difference]: Start difference. First operand 1650 states and 2670 transitions. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:04,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:47:04,083 INFO L93 Difference]: Finished difference Result 1732 states and 2798 transitions. [2021-11-23 16:47:04,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 16:47:04,084 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-23 16:47:04,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:47:04,096 INFO L225 Difference]: With dead ends: 1732 [2021-11-23 16:47:04,097 INFO L226 Difference]: Without dead ends: 1650 [2021-11-23 16:47:04,098 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 16:47:04,100 INFO L933 BasicCegarLoop]: 1689 mSDtfsCounter, 3 mSDsluCounter, 5003 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 6692 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:47:04,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 6692 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 16:47:04,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1650 states. [2021-11-23 16:47:04,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1650 to 1650. [2021-11-23 16:47:04,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1650 states, 1648 states have (on average 1.583131067961165) internal successors, (2609), 1649 states have internal predecessors, (2609), 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 16:47:04,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1650 states to 1650 states and 2609 transitions. [2021-11-23 16:47:04,162 INFO L78 Accepts]: Start accepts. Automaton has 1650 states and 2609 transitions. Word has length 46 [2021-11-23 16:47:04,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:47:04,162 INFO L470 AbstractCegarLoop]: Abstraction has 1650 states and 2609 transitions. [2021-11-23 16:47:04,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:04,163 INFO L276 IsEmpty]: Start isEmpty. Operand 1650 states and 2609 transitions. [2021-11-23 16:47:04,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-23 16:47:04,167 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:47:04,168 INFO L514 BasicCegarLoop]: trace histogram [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 16:47:04,189 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 16:47:04,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:47:04,383 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:47:04,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:47:04,384 INFO L85 PathProgramCache]: Analyzing trace with hash -159675118, now seen corresponding path program 1 times [2021-11-23 16:47:04,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:47:04,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1670969784] [2021-11-23 16:47:04,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:47:04,386 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:47:04,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:47:04,388 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:47:04,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 16:47:04,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:47:04,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:47:04,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:47:04,943 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:47:04,943 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:47:04,944 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:47:04,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1670969784] [2021-11-23 16:47:04,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1670969784] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:47:04,944 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:47:04,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 16:47:04,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765649904] [2021-11-23 16:47:04,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:47:04,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:47:04,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:47:04,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:47:04,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:47:04,947 INFO L87 Difference]: Start difference. First operand 1650 states and 2609 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 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 16:47:49,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:47:49,624 INFO L93 Difference]: Finished difference Result 4656 states and 7440 transitions. [2021-11-23 16:47:49,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:47:49,625 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 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 88 [2021-11-23 16:47:49,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:47:49,648 INFO L225 Difference]: With dead ends: 4656 [2021-11-23 16:47:49,649 INFO L226 Difference]: Without dead ends: 3152 [2021-11-23 16:47:49,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 86 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 16:47:49,654 INFO L933 BasicCegarLoop]: 840 mSDtfsCounter, 888 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2277 mSolverCounterSat, 664 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 888 SdHoareTripleChecker+Valid, 847 SdHoareTripleChecker+Invalid, 2941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 664 IncrementalHoareTripleChecker+Valid, 2277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 44.5s IncrementalHoareTripleChecker+Time [2021-11-23 16:47:49,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [888 Valid, 847 Invalid, 2941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [664 Valid, 2277 Invalid, 0 Unknown, 0 Unchecked, 44.5s Time] [2021-11-23 16:47:49,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3152 states. [2021-11-23 16:47:49,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3152 to 3152. [2021-11-23 16:47:49,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3152 states, 3150 states have (on average 1.3698412698412699) internal successors, (4315), 3151 states have internal predecessors, (4315), 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 16:47:49,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3152 states to 3152 states and 4315 transitions. [2021-11-23 16:47:49,739 INFO L78 Accepts]: Start accepts. Automaton has 3152 states and 4315 transitions. Word has length 88 [2021-11-23 16:47:49,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:47:49,740 INFO L470 AbstractCegarLoop]: Abstraction has 3152 states and 4315 transitions. [2021-11-23 16:47:49,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 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 16:47:49,741 INFO L276 IsEmpty]: Start isEmpty. Operand 3152 states and 4315 transitions. [2021-11-23 16:47:49,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-23 16:47:49,742 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:47:49,743 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:47:49,765 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-23 16:47:49,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:47:49,966 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:47:49,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:47:49,967 INFO L85 PathProgramCache]: Analyzing trace with hash 651878083, now seen corresponding path program 1 times [2021-11-23 16:47:49,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:47:49,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1586900319] [2021-11-23 16:47:49,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:47:49,971 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:47:49,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:47:49,972 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:47:50,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-23 16:47:50,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:47:50,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:47:50,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:47:50,622 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:47:50,622 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:47:50,622 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:47:50,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1586900319] [2021-11-23 16:47:50,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1586900319] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:47:50,623 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:47:50,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 16:47:50,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199160042] [2021-11-23 16:47:50,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:47:50,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:47:50,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:47:50,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:47:50,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:47:50,626 INFO L87 Difference]: Start difference. First operand 3152 states and 4315 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 2 states have internal predecessors, (97), 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 16:48:30,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:48:30,750 INFO L93 Difference]: Finished difference Result 9164 states and 12559 transitions. [2021-11-23 16:48:30,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:48:30,751 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 2 states have internal predecessors, (97), 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 97 [2021-11-23 16:48:30,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:48:30,791 INFO L225 Difference]: With dead ends: 9164 [2021-11-23 16:48:30,791 INFO L226 Difference]: Without dead ends: 6158 [2021-11-23 16:48:30,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 95 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 16:48:30,799 INFO L933 BasicCegarLoop]: 536 mSDtfsCounter, 1104 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2524 mSolverCounterSat, 335 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1104 SdHoareTripleChecker+Valid, 543 SdHoareTripleChecker+Invalid, 2859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 335 IncrementalHoareTripleChecker+Valid, 2524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 40.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:48:30,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1104 Valid, 543 Invalid, 2859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [335 Valid, 2524 Invalid, 0 Unknown, 0 Unchecked, 40.0s Time] [2021-11-23 16:48:30,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6158 states. [2021-11-23 16:48:30,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6158 to 6156. [2021-11-23 16:48:30,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6156 states, 6154 states have (on average 1.2742931426714332) internal successors, (7842), 6155 states have internal predecessors, (7842), 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 16:48:30,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6156 states to 6156 states and 7842 transitions. [2021-11-23 16:48:30,985 INFO L78 Accepts]: Start accepts. Automaton has 6156 states and 7842 transitions. Word has length 97 [2021-11-23 16:48:30,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:48:30,986 INFO L470 AbstractCegarLoop]: Abstraction has 6156 states and 7842 transitions. [2021-11-23 16:48:30,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 2 states have internal predecessors, (97), 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 16:48:30,988 INFO L276 IsEmpty]: Start isEmpty. Operand 6156 states and 7842 transitions. [2021-11-23 16:48:30,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-23 16:48:30,992 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:48:30,992 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:48:31,017 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-23 16:48:31,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:48:31,205 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:48:31,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:48:31,206 INFO L85 PathProgramCache]: Analyzing trace with hash 211182729, now seen corresponding path program 1 times [2021-11-23 16:48:31,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:48:31,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1531656202] [2021-11-23 16:48:31,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:48:31,207 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:48:31,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:48:31,211 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:48:31,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 16:48:31,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:48:31,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:48:31,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:48:31,849 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 16:48:31,850 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:48:31,850 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:48:31,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1531656202] [2021-11-23 16:48:31,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1531656202] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:48:31,850 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:48:31,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:48:31,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837461337] [2021-11-23 16:48:31,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:48:31,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:48:31,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:48:31,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:48:31,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:48:31,853 INFO L87 Difference]: Start difference. First operand 6156 states and 7842 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 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 16:48:31,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:48:31,928 INFO L93 Difference]: Finished difference Result 6306 states and 8080 transitions. [2021-11-23 16:48:31,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:48:31,929 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 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 106 [2021-11-23 16:48:31,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:48:31,970 INFO L225 Difference]: With dead ends: 6306 [2021-11-23 16:48:31,970 INFO L226 Difference]: Without dead ends: 6228 [2021-11-23 16:48:31,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 104 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 16:48:31,974 INFO L933 BasicCegarLoop]: 1724 mSDtfsCounter, 1549 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1549 SdHoareTripleChecker+Valid, 1850 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:48:31,975 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1549 Valid, 1850 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:48:31,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6228 states. [2021-11-23 16:48:32,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6228 to 6226. [2021-11-23 16:48:32,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6226 states, 6224 states have (on average 1.2779562982005142) internal successors, (7954), 6225 states have internal predecessors, (7954), 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 16:48:32,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6226 states to 6226 states and 7954 transitions. [2021-11-23 16:48:32,155 INFO L78 Accepts]: Start accepts. Automaton has 6226 states and 7954 transitions. Word has length 106 [2021-11-23 16:48:32,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:48:32,156 INFO L470 AbstractCegarLoop]: Abstraction has 6226 states and 7954 transitions. [2021-11-23 16:48:32,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 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 16:48:32,156 INFO L276 IsEmpty]: Start isEmpty. Operand 6226 states and 7954 transitions. [2021-11-23 16:48:32,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-23 16:48:32,158 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:48:32,161 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:48:32,186 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-23 16:48:32,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:48:32,378 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:48:32,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:48:32,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1458691583, now seen corresponding path program 1 times [2021-11-23 16:48:32,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:48:32,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1720705132] [2021-11-23 16:48:32,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:48:32,380 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:48:32,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:48:32,382 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:48:32,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 16:48:32,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:48:32,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:48:32,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:48:33,081 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 16:48:33,081 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:48:33,081 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:48:33,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1720705132] [2021-11-23 16:48:33,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1720705132] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:48:33,082 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:48:33,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:48:33,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680045844] [2021-11-23 16:48:33,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:48:33,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:48:33,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:48:33,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:48:33,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:48:33,085 INFO L87 Difference]: Start difference. First operand 6226 states and 7954 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 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 16:48:33,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:48:33,168 INFO L93 Difference]: Finished difference Result 6510 states and 8406 transitions. [2021-11-23 16:48:33,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:48:33,169 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 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 106 [2021-11-23 16:48:33,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:48:33,206 INFO L225 Difference]: With dead ends: 6510 [2021-11-23 16:48:33,206 INFO L226 Difference]: Without dead ends: 6362 [2021-11-23 16:48:33,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 104 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 16:48:33,210 INFO L933 BasicCegarLoop]: 1719 mSDtfsCounter, 1545 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1545 SdHoareTripleChecker+Valid, 1849 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:48:33,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1545 Valid, 1849 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:48:33,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6362 states. [2021-11-23 16:48:33,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6362 to 6360. [2021-11-23 16:48:33,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6360 states, 6358 states have (on average 1.2845234350424661) internal successors, (8167), 6359 states have internal predecessors, (8167), 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 16:48:33,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6360 states to 6360 states and 8167 transitions. [2021-11-23 16:48:33,397 INFO L78 Accepts]: Start accepts. Automaton has 6360 states and 8167 transitions. Word has length 106 [2021-11-23 16:48:33,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:48:33,398 INFO L470 AbstractCegarLoop]: Abstraction has 6360 states and 8167 transitions. [2021-11-23 16:48:33,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 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 16:48:33,398 INFO L276 IsEmpty]: Start isEmpty. Operand 6360 states and 8167 transitions. [2021-11-23 16:48:33,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-23 16:48:33,400 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:48:33,400 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:48:33,425 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-23 16:48:33,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:48:33,617 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:48:33,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:48:33,618 INFO L85 PathProgramCache]: Analyzing trace with hash 717259381, now seen corresponding path program 1 times [2021-11-23 16:48:33,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:48:33,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1468811900] [2021-11-23 16:48:33,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:48:33,619 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:48:33,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:48:33,623 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:48:33,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-23 16:48:33,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:48:33,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:48:33,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:48:34,219 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 16:48:34,220 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:48:34,220 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:48:34,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1468811900] [2021-11-23 16:48:34,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1468811900] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:48:34,220 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:48:34,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:48:34,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598572090] [2021-11-23 16:48:34,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:48:34,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:48:34,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:48:34,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:48:34,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:48:34,223 INFO L87 Difference]: Start difference. First operand 6360 states and 8167 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 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 16:48:34,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:48:34,314 INFO L93 Difference]: Finished difference Result 6900 states and 9025 transitions. [2021-11-23 16:48:34,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:48:34,315 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 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 106 [2021-11-23 16:48:34,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:48:34,357 INFO L225 Difference]: With dead ends: 6900 [2021-11-23 16:48:34,367 INFO L226 Difference]: Without dead ends: 6618 [2021-11-23 16:48:34,373 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 104 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 16:48:34,374 INFO L933 BasicCegarLoop]: 1714 mSDtfsCounter, 1541 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1541 SdHoareTripleChecker+Valid, 1848 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:48:34,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1541 Valid, 1848 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:48:34,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6618 states. [2021-11-23 16:48:34,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6618 to 6616. [2021-11-23 16:48:34,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6616 states, 6614 states have (on average 1.2958875113395827) internal successors, (8571), 6615 states have internal predecessors, (8571), 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 16:48:34,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6616 states to 6616 states and 8571 transitions. [2021-11-23 16:48:34,559 INFO L78 Accepts]: Start accepts. Automaton has 6616 states and 8571 transitions. Word has length 106 [2021-11-23 16:48:34,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:48:34,559 INFO L470 AbstractCegarLoop]: Abstraction has 6616 states and 8571 transitions. [2021-11-23 16:48:34,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 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 16:48:34,561 INFO L276 IsEmpty]: Start isEmpty. Operand 6616 states and 8571 transitions. [2021-11-23 16:48:34,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-23 16:48:34,562 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:48:34,563 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:48:34,585 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-23 16:48:34,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:48:34,777 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:48:34,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:48:34,778 INFO L85 PathProgramCache]: Analyzing trace with hash -28323349, now seen corresponding path program 1 times [2021-11-23 16:48:34,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:48:34,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [790896341] [2021-11-23 16:48:34,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:48:34,779 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:48:34,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:48:34,780 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:48:34,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-23 16:48:34,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:48:34,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:48:34,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:48:35,331 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 16:48:35,331 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:48:35,331 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:48:35,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [790896341] [2021-11-23 16:48:35,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [790896341] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:48:35,331 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:48:35,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:48:35,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8930665] [2021-11-23 16:48:35,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:48:35,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:48:35,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:48:35,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:48:35,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:48:35,334 INFO L87 Difference]: Start difference. First operand 6616 states and 8571 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 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 16:48:35,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:48:35,474 INFO L93 Difference]: Finished difference Result 7644 states and 10197 transitions. [2021-11-23 16:48:35,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:48:35,474 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 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 106 [2021-11-23 16:48:35,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:48:35,491 INFO L225 Difference]: With dead ends: 7644 [2021-11-23 16:48:35,492 INFO L226 Difference]: Without dead ends: 7106 [2021-11-23 16:48:35,495 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 104 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 16:48:35,496 INFO L933 BasicCegarLoop]: 1709 mSDtfsCounter, 1537 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1537 SdHoareTripleChecker+Valid, 1847 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:48:35,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1537 Valid, 1847 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:48:35,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7106 states. [2021-11-23 16:48:35,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7106 to 7104. [2021-11-23 16:48:35,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7104 states, 7102 states have (on average 1.314418473669389) internal successors, (9335), 7103 states have internal predecessors, (9335), 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 16:48:35,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7104 states to 7104 states and 9335 transitions. [2021-11-23 16:48:35,667 INFO L78 Accepts]: Start accepts. Automaton has 7104 states and 9335 transitions. Word has length 106 [2021-11-23 16:48:35,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:48:35,667 INFO L470 AbstractCegarLoop]: Abstraction has 7104 states and 9335 transitions. [2021-11-23 16:48:35,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 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 16:48:35,668 INFO L276 IsEmpty]: Start isEmpty. Operand 7104 states and 9335 transitions. [2021-11-23 16:48:35,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-23 16:48:35,670 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:48:35,670 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:48:35,696 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-23 16:48:35,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:48:35,889 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:48:35,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:48:35,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1968354207, now seen corresponding path program 1 times [2021-11-23 16:48:35,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:48:35,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [342650107] [2021-11-23 16:48:35,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:48:35,891 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:48:35,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:48:35,892 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:48:35,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-23 16:48:36,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:48:36,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:48:36,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:48:36,499 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 16:48:36,499 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:48:36,499 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:48:36,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [342650107] [2021-11-23 16:48:36,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [342650107] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:48:36,500 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:48:36,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:48:36,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157507830] [2021-11-23 16:48:36,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:48:36,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:48:36,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:48:36,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:48:36,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:48:36,502 INFO L87 Difference]: Start difference. First operand 7104 states and 9335 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 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 16:48:36,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:48:36,624 INFO L93 Difference]: Finished difference Result 9060 states and 12409 transitions. [2021-11-23 16:48:36,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:48:36,625 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 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 106 [2021-11-23 16:48:36,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:48:36,645 INFO L225 Difference]: With dead ends: 9060 [2021-11-23 16:48:36,645 INFO L226 Difference]: Without dead ends: 8034 [2021-11-23 16:48:36,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 104 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 16:48:36,653 INFO L933 BasicCegarLoop]: 1704 mSDtfsCounter, 1533 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1533 SdHoareTripleChecker+Valid, 1846 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:48:36,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1533 Valid, 1846 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:48:36,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8034 states. [2021-11-23 16:48:36,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8034 to 8032. [2021-11-23 16:48:36,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8032 states, 8030 states have (on average 1.341843088418431) internal successors, (10775), 8031 states have internal predecessors, (10775), 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 16:48:36,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8032 states to 8032 states and 10775 transitions. [2021-11-23 16:48:36,869 INFO L78 Accepts]: Start accepts. Automaton has 8032 states and 10775 transitions. Word has length 106 [2021-11-23 16:48:36,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:48:36,869 INFO L470 AbstractCegarLoop]: Abstraction has 8032 states and 10775 transitions. [2021-11-23 16:48:36,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 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 16:48:36,870 INFO L276 IsEmpty]: Start isEmpty. Operand 8032 states and 10775 transitions. [2021-11-23 16:48:36,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-23 16:48:36,871 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:48:36,872 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:48:36,893 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-23 16:48:37,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:48:37,089 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:48:37,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:48:37,089 INFO L85 PathProgramCache]: Analyzing trace with hash 732328407, now seen corresponding path program 1 times [2021-11-23 16:48:37,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:48:37,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [75564495] [2021-11-23 16:48:37,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:48:37,090 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:48:37,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:48:37,091 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:48:37,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-23 16:48:37,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:48:37,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:48:37,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:48:37,710 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 16:48:37,710 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:48:37,710 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:48:37,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [75564495] [2021-11-23 16:48:37,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [75564495] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:48:37,711 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:48:37,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:48:37,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567603651] [2021-11-23 16:48:37,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:48:37,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:48:37,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:48:37,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:48:37,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:48:37,713 INFO L87 Difference]: Start difference. First operand 8032 states and 10775 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 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 16:48:37,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:48:37,900 INFO L93 Difference]: Finished difference Result 11748 states and 16569 transitions. [2021-11-23 16:48:37,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:48:37,901 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 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 106 [2021-11-23 16:48:37,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:48:37,925 INFO L225 Difference]: With dead ends: 11748 [2021-11-23 16:48:37,925 INFO L226 Difference]: Without dead ends: 9794 [2021-11-23 16:48:37,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 104 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 16:48:37,933 INFO L933 BasicCegarLoop]: 1699 mSDtfsCounter, 1529 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1529 SdHoareTripleChecker+Valid, 1845 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:48:37,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1529 Valid, 1845 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:48:37,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9794 states. [2021-11-23 16:48:38,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9794 to 9792. [2021-11-23 16:48:38,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9792 states, 9790 states have (on average 1.3768130745658835) internal successors, (13479), 9791 states have internal predecessors, (13479), 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 16:48:38,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9792 states to 9792 states and 13479 transitions. [2021-11-23 16:48:38,237 INFO L78 Accepts]: Start accepts. Automaton has 9792 states and 13479 transitions. Word has length 106 [2021-11-23 16:48:38,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:48:38,237 INFO L470 AbstractCegarLoop]: Abstraction has 9792 states and 13479 transitions. [2021-11-23 16:48:38,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 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 16:48:38,238 INFO L276 IsEmpty]: Start isEmpty. Operand 9792 states and 13479 transitions. [2021-11-23 16:48:38,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-23 16:48:38,240 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:48:38,240 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:48:38,303 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-23 16:48:38,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:48:38,491 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:48:38,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:48:38,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1070121549, now seen corresponding path program 1 times [2021-11-23 16:48:38,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:48:38,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [689775174] [2021-11-23 16:48:38,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:48:38,493 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:48:38,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:48:38,494 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:48:38,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-23 16:48:38,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:48:38,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:48:38,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:48:39,057 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 16:48:39,057 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:48:39,057 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:48:39,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [689775174] [2021-11-23 16:48:39,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [689775174] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:48:39,058 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:48:39,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:48:39,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977494841] [2021-11-23 16:48:39,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:48:39,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:48:39,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:48:39,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:48:39,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:48:39,060 INFO L87 Difference]: Start difference. First operand 9792 states and 13479 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 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 16:48:39,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:48:39,358 INFO L93 Difference]: Finished difference Result 16836 states and 24361 transitions. [2021-11-23 16:48:39,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:48:39,358 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 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 106 [2021-11-23 16:48:39,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:48:39,392 INFO L225 Difference]: With dead ends: 16836 [2021-11-23 16:48:39,392 INFO L226 Difference]: Without dead ends: 13122 [2021-11-23 16:48:39,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 104 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 16:48:39,402 INFO L933 BasicCegarLoop]: 1694 mSDtfsCounter, 1525 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1525 SdHoareTripleChecker+Valid, 1844 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:48:39,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1525 Valid, 1844 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:48:39,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13122 states. [2021-11-23 16:48:39,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13122 to 13120. [2021-11-23 16:48:39,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13120 states, 13118 states have (on average 1.4129440463485288) internal successors, (18535), 13119 states have internal predecessors, (18535), 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 16:48:39,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13120 states to 13120 states and 18535 transitions. [2021-11-23 16:48:39,896 INFO L78 Accepts]: Start accepts. Automaton has 13120 states and 18535 transitions. Word has length 106 [2021-11-23 16:48:39,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:48:39,897 INFO L470 AbstractCegarLoop]: Abstraction has 13120 states and 18535 transitions. [2021-11-23 16:48:39,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 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 16:48:39,897 INFO L276 IsEmpty]: Start isEmpty. Operand 13120 states and 18535 transitions. [2021-11-23 16:48:39,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-23 16:48:39,899 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:48:39,900 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:48:39,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-23 16:48:40,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:48:40,117 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:48:40,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:48:40,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1478760321, now seen corresponding path program 1 times [2021-11-23 16:48:40,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:48:40,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [6441055] [2021-11-23 16:48:40,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:48:40,118 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:48:40,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:48:40,119 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:48:40,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-23 16:48:40,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:48:40,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 16:48:40,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:48:42,134 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 16:48:42,134 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:48:42,134 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:48:42,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [6441055] [2021-11-23 16:48:42,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [6441055] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:48:42,135 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:48:42,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 16:48:42,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007205106] [2021-11-23 16:48:42,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:48:42,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 16:48:42,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:48:42,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 16:48:42,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-23 16:48:42,138 INFO L87 Difference]: Start difference. First operand 13120 states and 18535 transitions. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 5 states have internal predecessors, (106), 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 16:48:42,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:48:42,650 INFO L93 Difference]: Finished difference Result 20195 states and 29395 transitions. [2021-11-23 16:48:42,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 16:48:42,651 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 5 states have internal predecessors, (106), 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 106 [2021-11-23 16:48:42,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:48:42,683 INFO L225 Difference]: With dead ends: 20195 [2021-11-23 16:48:42,683 INFO L226 Difference]: Without dead ends: 13153 [2021-11-23 16:48:42,694 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-23 16:48:42,696 INFO L933 BasicCegarLoop]: 1603 mSDtfsCounter, 1488 mSDsluCounter, 1768 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1488 SdHoareTripleChecker+Valid, 3371 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:48:42,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1488 Valid, 3371 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 56 Invalid, 0 Unknown, 61 Unchecked, 0.1s Time] [2021-11-23 16:48:42,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13153 states. [2021-11-23 16:48:43,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13153 to 13151. [2021-11-23 16:48:43,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13151 states, 13149 states have (on average 1.4125789033386569) internal successors, (18574), 13150 states have internal predecessors, (18574), 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 16:48:43,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13151 states to 13151 states and 18574 transitions. [2021-11-23 16:48:43,172 INFO L78 Accepts]: Start accepts. Automaton has 13151 states and 18574 transitions. Word has length 106 [2021-11-23 16:48:43,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:48:43,172 INFO L470 AbstractCegarLoop]: Abstraction has 13151 states and 18574 transitions. [2021-11-23 16:48:43,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 5 states have internal predecessors, (106), 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 16:48:43,173 INFO L276 IsEmpty]: Start isEmpty. Operand 13151 states and 18574 transitions. [2021-11-23 16:48:43,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-23 16:48:43,175 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:48:43,175 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:48:43,197 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-23 16:48:43,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:48:43,393 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:48:43,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:48:43,394 INFO L85 PathProgramCache]: Analyzing trace with hash -2006860349, now seen corresponding path program 1 times [2021-11-23 16:48:43,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:48:43,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1340497362] [2021-11-23 16:48:43,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:48:43,395 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:48:43,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:48:43,397 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:48:43,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-23 16:48:43,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:48:43,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 16:48:43,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:48:48,213 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 16:48:48,213 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:48:48,214 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:48:48,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1340497362] [2021-11-23 16:48:48,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1340497362] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:48:48,214 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:48:48,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-23 16:48:48,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754256786] [2021-11-23 16:48:48,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:48:48,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 16:48:48,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:48:48,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 16:48:48,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-11-23 16:48:48,217 INFO L87 Difference]: Start difference. First operand 13151 states and 18574 transitions. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 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 16:48:51,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:48:51,095 INFO L93 Difference]: Finished difference Result 76529 states and 115927 transitions. [2021-11-23 16:48:51,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 16:48:51,097 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 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 106 [2021-11-23 16:48:51,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:48:51,304 INFO L225 Difference]: With dead ends: 76529 [2021-11-23 16:48:51,305 INFO L226 Difference]: Without dead ends: 69487 [2021-11-23 16:48:51,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-11-23 16:48:51,352 INFO L933 BasicCegarLoop]: 1627 mSDtfsCounter, 4405 mSDsluCounter, 1243 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4405 SdHoareTripleChecker+Valid, 2870 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 16:48:51,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4405 Valid, 2870 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-23 16:48:51,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69487 states. [2021-11-23 16:48:53,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69487 to 27231. [2021-11-23 16:48:53,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27231 states, 27229 states have (on average 1.4624848507106394) internal successors, (39822), 27230 states have internal predecessors, (39822), 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 16:48:53,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27231 states to 27231 states and 39822 transitions. [2021-11-23 16:48:53,112 INFO L78 Accepts]: Start accepts. Automaton has 27231 states and 39822 transitions. Word has length 106 [2021-11-23 16:48:53,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:48:53,112 INFO L470 AbstractCegarLoop]: Abstraction has 27231 states and 39822 transitions. [2021-11-23 16:48:53,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 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 16:48:53,113 INFO L276 IsEmpty]: Start isEmpty. Operand 27231 states and 39822 transitions. [2021-11-23 16:48:53,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-23 16:48:53,115 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:48:53,115 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:48:53,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-23 16:48:53,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:48:53,330 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:48:53,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:48:53,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1568165997, now seen corresponding path program 1 times [2021-11-23 16:48:53,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:48:53,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [889955398] [2021-11-23 16:48:53,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:48:53,331 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:48:53,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:48:53,332 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:48:53,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-23 16:48:53,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:48:53,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:48:53,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:48:53,908 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 16:48:53,908 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:48:53,908 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:48:53,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [889955398] [2021-11-23 16:48:53,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [889955398] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:48:53,909 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:48:53,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:48:53,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759937378] [2021-11-23 16:48:53,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:48:53,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:48:53,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:48:53,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:48:53,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:48:53,911 INFO L87 Difference]: Start difference. First operand 27231 states and 39822 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 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 16:48:55,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:48:55,686 INFO L93 Difference]: Finished difference Result 67427 states and 100368 transitions. [2021-11-23 16:48:55,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:48:55,686 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 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 108 [2021-11-23 16:48:55,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:48:55,766 INFO L225 Difference]: With dead ends: 67427 [2021-11-23 16:48:55,766 INFO L226 Difference]: Without dead ends: 46305 [2021-11-23 16:48:55,792 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 106 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 16:48:55,793 INFO L933 BasicCegarLoop]: 1628 mSDtfsCounter, 1516 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1516 SdHoareTripleChecker+Valid, 1745 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:48:55,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1516 Valid, 1745 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:48:55,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46305 states. [2021-11-23 16:48:57,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46305 to 45919. [2021-11-23 16:48:58,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45919 states, 45917 states have (on average 1.4568460483045496) internal successors, (66894), 45918 states have internal predecessors, (66894), 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 16:48:58,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45919 states to 45919 states and 66894 transitions. [2021-11-23 16:48:58,120 INFO L78 Accepts]: Start accepts. Automaton has 45919 states and 66894 transitions. Word has length 108 [2021-11-23 16:48:58,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:48:58,121 INFO L470 AbstractCegarLoop]: Abstraction has 45919 states and 66894 transitions. [2021-11-23 16:48:58,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 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 16:48:58,122 INFO L276 IsEmpty]: Start isEmpty. Operand 45919 states and 66894 transitions. [2021-11-23 16:48:58,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-23 16:48:58,124 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:48:58,124 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:48:58,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-23 16:48:58,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:48:58,339 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:48:58,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:48:58,340 INFO L85 PathProgramCache]: Analyzing trace with hash 278070463, now seen corresponding path program 1 times [2021-11-23 16:48:58,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:48:58,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1205639184] [2021-11-23 16:48:58,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:48:58,341 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:48:58,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:48:58,342 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:48:58,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-23 16:48:58,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:48:58,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 16:48:58,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:48:58,786 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 16:48:58,787 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:48:58,787 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:48:58,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1205639184] [2021-11-23 16:48:58,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1205639184] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:48:58,787 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:48:58,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 16:48:58,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475217308] [2021-11-23 16:48:58,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:48:58,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 16:48:58,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:48:58,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 16:48:58,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:48:58,790 INFO L87 Difference]: Start difference. First operand 45919 states and 66894 transitions. Second operand has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 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 16:49:02,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:49:02,125 INFO L93 Difference]: Finished difference Result 76227 states and 111160 transitions. [2021-11-23 16:49:02,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 16:49:02,126 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 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 109 [2021-11-23 16:49:02,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:49:02,306 INFO L225 Difference]: With dead ends: 76227 [2021-11-23 16:49:02,306 INFO L226 Difference]: Without dead ends: 76225 [2021-11-23 16:49:02,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 16:49:02,331 INFO L933 BasicCegarLoop]: 1690 mSDtfsCounter, 342 mSDsluCounter, 4892 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 6582 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:49:02,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [342 Valid, 6582 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 16:49:02,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76225 states. [2021-11-23 16:49:05,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76225 to 47455. [2021-11-23 16:49:05,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47455 states, 47453 states have (on average 1.4393610519882831) internal successors, (68302), 47454 states have internal predecessors, (68302), 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 16:49:05,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47455 states to 47455 states and 68302 transitions. [2021-11-23 16:49:05,704 INFO L78 Accepts]: Start accepts. Automaton has 47455 states and 68302 transitions. Word has length 109 [2021-11-23 16:49:05,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:49:05,705 INFO L470 AbstractCegarLoop]: Abstraction has 47455 states and 68302 transitions. [2021-11-23 16:49:05,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 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 16:49:05,705 INFO L276 IsEmpty]: Start isEmpty. Operand 47455 states and 68302 transitions. [2021-11-23 16:49:05,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-23 16:49:05,709 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:49:05,709 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:49:05,736 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-23 16:49:05,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:49:05,926 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:49:05,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:49:05,926 INFO L85 PathProgramCache]: Analyzing trace with hash -638021808, now seen corresponding path program 1 times [2021-11-23 16:49:05,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:49:05,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [962391699] [2021-11-23 16:49:05,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:49:05,927 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:49:05,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:49:05,928 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:49:05,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-23 16:49:06,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:49:06,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:49:06,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:49:06,438 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 16:49:06,438 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:49:06,438 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:49:06,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [962391699] [2021-11-23 16:49:06,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [962391699] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:49:06,439 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:49:06,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:49:06,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645990087] [2021-11-23 16:49:06,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:49:06,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:49:06,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:49:06,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:49:06,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:49:06,442 INFO L87 Difference]: Start difference. First operand 47455 states and 68302 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:09,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:49:09,714 INFO L93 Difference]: Finished difference Result 88932 states and 129745 transitions. [2021-11-23 16:49:09,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:49:09,714 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-11-23 16:49:09,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:49:09,949 INFO L225 Difference]: With dead ends: 88932 [2021-11-23 16:49:09,950 INFO L226 Difference]: Without dead ends: 66657 [2021-11-23 16:49:10,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 108 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 16:49:10,005 INFO L933 BasicCegarLoop]: 1733 mSDtfsCounter, 1550 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1550 SdHoareTripleChecker+Valid, 1855 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:49:10,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1550 Valid, 1855 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:49:10,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66657 states. [2021-11-23 16:49:14,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66657 to 66655. [2021-11-23 16:49:14,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66655 states, 66653 states have (on average 1.4424106941923094) internal successors, (96141), 66654 states have internal predecessors, (96141), 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 16:49:14,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66655 states to 66655 states and 96141 transitions. [2021-11-23 16:49:14,210 INFO L78 Accepts]: Start accepts. Automaton has 66655 states and 96141 transitions. Word has length 110 [2021-11-23 16:49:14,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:49:14,210 INFO L470 AbstractCegarLoop]: Abstraction has 66655 states and 96141 transitions. [2021-11-23 16:49:14,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:14,211 INFO L276 IsEmpty]: Start isEmpty. Operand 66655 states and 96141 transitions. [2021-11-23 16:49:14,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-23 16:49:14,242 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:49:14,243 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:49:14,263 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-23 16:49:14,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:49:14,460 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:49:14,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:49:14,460 INFO L85 PathProgramCache]: Analyzing trace with hash 635734382, now seen corresponding path program 1 times [2021-11-23 16:49:14,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:49:14,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [508065256] [2021-11-23 16:49:14,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:49:14,461 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:49:14,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:49:14,462 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:49:14,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-23 16:49:14,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:49:14,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:49:14,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:49:15,073 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:49:15,073 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:49:15,073 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:49:15,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [508065256] [2021-11-23 16:49:15,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [508065256] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:49:15,073 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:49:15,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:49:15,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084416055] [2021-11-23 16:49:15,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:49:15,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:49:15,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:49:15,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:49:15,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:49:15,075 INFO L87 Difference]: Start difference. First operand 66655 states and 96141 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 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 16:49:17,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:49:17,942 INFO L93 Difference]: Finished difference Result 108172 states and 157248 transitions. [2021-11-23 16:49:17,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:49:17,943 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 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 149 [2021-11-23 16:49:17,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:49:17,998 INFO L225 Difference]: With dead ends: 108172 [2021-11-23 16:49:17,998 INFO L226 Difference]: Without dead ends: 47626 [2021-11-23 16:49:18,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 147 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 16:49:18,037 INFO L933 BasicCegarLoop]: 1694 mSDtfsCounter, 81 mSDsluCounter, 1614 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 3308 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:49:18,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 3308 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:49:18,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47626 states. [2021-11-23 16:49:21,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47626 to 47624. [2021-11-23 16:49:21,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47624 states, 47622 states have (on average 1.4379278484733946) internal successors, (68477), 47623 states have internal predecessors, (68477), 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 16:49:21,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47624 states to 47624 states and 68477 transitions. [2021-11-23 16:49:21,165 INFO L78 Accepts]: Start accepts. Automaton has 47624 states and 68477 transitions. Word has length 149 [2021-11-23 16:49:21,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:49:21,165 INFO L470 AbstractCegarLoop]: Abstraction has 47624 states and 68477 transitions. [2021-11-23 16:49:21,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 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 16:49:21,165 INFO L276 IsEmpty]: Start isEmpty. Operand 47624 states and 68477 transitions. [2021-11-23 16:49:21,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-23 16:49:21,183 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:49:21,184 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:49:21,202 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-23 16:49:21,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:49:21,393 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:49:21,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:49:21,394 INFO L85 PathProgramCache]: Analyzing trace with hash -401351309, now seen corresponding path program 1 times [2021-11-23 16:49:21,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:49:21,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1079370609] [2021-11-23 16:49:21,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:49:21,395 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:49:21,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:49:21,396 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:49:21,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b479a3e-f461-4afa-a2f3-a69ce268027b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-23 16:49:21,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:49:21,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:49:21,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:49:23,905 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:49:23,905 INFO L328 TraceCheckSpWp]: Computing backward predicates...