./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/cstrcat-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6a47aea7 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/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_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/cstrcat-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash bfd8ca9d9dda86f57445168715d124831c95b647e7c1b1093bb129b0384cce9e --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 16:45:02,907 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 16:45:02,911 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 16:45:02,967 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 16:45:02,968 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 16:45:02,972 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 16:45:02,974 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 16:45:02,979 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 16:45:02,981 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 16:45:02,987 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 16:45:02,988 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 16:45:02,990 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 16:45:02,991 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 16:45:02,994 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 16:45:02,996 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 16:45:03,005 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 16:45:03,007 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 16:45:03,008 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 16:45:03,010 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 16:45:03,014 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 16:45:03,015 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 16:45:03,017 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 16:45:03,018 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 16:45:03,019 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 16:45:03,023 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 16:45:03,023 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 16:45:03,024 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 16:45:03,025 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 16:45:03,026 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 16:45:03,027 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 16:45:03,027 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 16:45:03,028 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 16:45:03,029 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 16:45:03,030 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 16:45:03,032 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 16:45:03,032 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 16:45:03,033 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 16:45:03,033 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 16:45:03,034 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 16:45:03,035 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 16:45:03,036 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 16:45:03,037 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-23 16:45:03,060 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 16:45:03,061 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 16:45:03,061 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 16:45:03,061 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 16:45:03,062 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 16:45:03,062 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 16:45:03,063 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 16:45:03,063 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 16:45:03,063 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 16:45:03,063 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 16:45:03,064 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 16:45:03,064 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 16:45:03,064 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 16:45:03,064 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 16:45:03,064 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 16:45:03,065 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 16:45:03,065 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 16:45:03,065 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 16:45:03,066 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 16:45:03,066 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 16:45:03,066 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 16:45:03,067 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 16:45:03,067 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-23 16:45:03,067 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 16:45:03,067 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 16:45:03,068 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 16:45:03,068 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-23 16:45:03,068 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-23 16:45:03,069 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-23 16:45:03,069 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 16:45:03,070 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 16:45:03,070 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 16:45:03,070 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 16:45:03,070 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 16:45:03,071 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 16:45:03,071 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:45:03,072 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 16:45:03,072 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 16:45:03,073 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 16:45:03,073 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 16:45:03,074 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 16:45:03,075 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 16:45:03,075 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_95a64f07-c549-4cad-b9b3-ed18e14ce19f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bfd8ca9d9dda86f57445168715d124831c95b647e7c1b1093bb129b0384cce9e [2021-11-23 16:45:03,361 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 16:45:03,389 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 16:45:03,392 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 16:45:03,393 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 16:45:03,394 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 16:45:03,395 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/array-memsafety/cstrcat-alloca-2.i [2021-11-23 16:45:03,467 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/data/06f762b4d/8d35aec2242b4094b3019f50db9f4bf3/FLAGa4fd7ff64 [2021-11-23 16:45:03,977 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 16:45:03,983 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/sv-benchmarks/c/array-memsafety/cstrcat-alloca-2.i [2021-11-23 16:45:03,996 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/data/06f762b4d/8d35aec2242b4094b3019f50db9f4bf3/FLAGa4fd7ff64 [2021-11-23 16:45:04,310 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/data/06f762b4d/8d35aec2242b4094b3019f50db9f4bf3 [2021-11-23 16:45:04,312 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 16:45:04,313 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 16:45:04,316 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 16:45:04,316 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 16:45:04,319 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 16:45:04,320 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:45:04" (1/1) ... [2021-11-23 16:45:04,321 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76fccc18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:04, skipping insertion in model container [2021-11-23 16:45:04,321 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:45:04" (1/1) ... [2021-11-23 16:45:04,329 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 16:45:04,370 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 16:45:04,733 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:45:04,741 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 16:45:04,777 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:45:04,805 INFO L208 MainTranslator]: Completed translation [2021-11-23 16:45:04,805 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:04 WrapperNode [2021-11-23 16:45:04,806 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 16:45:04,807 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 16:45:04,807 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 16:45:04,807 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 16:45:04,815 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:04" (1/1) ... [2021-11-23 16:45:04,828 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:04" (1/1) ... [2021-11-23 16:45:04,854 INFO L137 Inliner]: procedures = 117, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 94 [2021-11-23 16:45:04,854 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 16:45:04,855 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 16:45:04,855 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 16:45:04,855 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 16:45:04,864 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:04" (1/1) ... [2021-11-23 16:45:04,864 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:04" (1/1) ... [2021-11-23 16:45:04,867 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:04" (1/1) ... [2021-11-23 16:45:04,868 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:04" (1/1) ... [2021-11-23 16:45:04,875 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:04" (1/1) ... [2021-11-23 16:45:04,880 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:04" (1/1) ... [2021-11-23 16:45:04,882 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:04" (1/1) ... [2021-11-23 16:45:04,885 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 16:45:04,886 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 16:45:04,886 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 16:45:04,886 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 16:45:04,887 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:04" (1/1) ... [2021-11-23 16:45:04,895 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:45:04,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:45:04,919 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 16:45:04,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 16:45:04,958 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 16:45:04,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 16:45:04,959 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 16:45:04,959 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 16:45:04,960 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 16:45:04,960 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 16:45:05,065 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 16:45:05,067 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 16:45:05,240 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 16:45:05,267 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 16:45:05,272 INFO L158 Benchmark]: Toolchain (without parser) took 957.27ms. Allocated memory is still 111.1MB. Free memory was 71.1MB in the beginning and 62.8MB in the end (delta: 8.3MB). Peak memory consumption was 6.1MB. Max. memory is 16.1GB. [2021-11-23 16:45:05,273 INFO L158 Benchmark]: CDTParser took 0.32ms. Allocated memory is still 111.1MB. Free memory was 88.5MB in the beginning and 88.5MB in the end (delta: 55.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 16:45:05,274 INFO L158 Benchmark]: CACSL2BoogieTranslator took 490.58ms. Allocated memory is still 111.1MB. Free memory was 70.9MB in the beginning and 80.4MB in the end (delta: -9.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-23 16:45:05,275 INFO L158 Benchmark]: Boogie Procedure Inliner took 47.43ms. Allocated memory is still 111.1MB. Free memory was 80.4MB in the beginning and 78.4MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 16:45:05,276 INFO L158 Benchmark]: Boogie Preprocessor took 30.00ms. Allocated memory is still 111.1MB. Free memory was 78.4MB in the beginning and 76.9MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 16:45:05,277 INFO L158 Benchmark]: RCFGBuilder took 384.34ms. Allocated memory is still 111.1MB. Free memory was 76.9MB in the beginning and 62.8MB in the end (delta: 14.1MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-23 16:45:05,281 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32ms. Allocated memory is still 111.1MB. Free memory was 88.5MB in the beginning and 88.5MB in the end (delta: 55.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 490.58ms. Allocated memory is still 111.1MB. Free memory was 70.9MB in the beginning and 80.4MB in the end (delta: -9.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 47.43ms. Allocated memory is still 111.1MB. Free memory was 80.4MB in the beginning and 78.4MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 30.00ms. Allocated memory is still 111.1MB. Free memory was 78.4MB in the beginning and 76.9MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 384.34ms. Allocated memory is still 111.1MB. Free memory was 76.9MB in the beginning and 62.8MB in the end (delta: 14.1MB). Peak memory consumption was 14.7MB. 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 16:45:05,332 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/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_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/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_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/cstrcat-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash bfd8ca9d9dda86f57445168715d124831c95b647e7c1b1093bb129b0384cce9e --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 16:45:07,808 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 16:45:07,811 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 16:45:07,843 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 16:45:07,848 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 16:45:07,853 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 16:45:07,859 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 16:45:07,864 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 16:45:07,868 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 16:45:07,876 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 16:45:07,877 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 16:45:07,879 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 16:45:07,880 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 16:45:07,883 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 16:45:07,886 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 16:45:07,888 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 16:45:07,890 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 16:45:07,895 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 16:45:07,900 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 16:45:07,908 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 16:45:07,910 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 16:45:07,911 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 16:45:07,914 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 16:45:07,916 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 16:45:07,926 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 16:45:07,926 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 16:45:07,927 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 16:45:07,929 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 16:45:07,929 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 16:45:07,931 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 16:45:07,932 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 16:45:07,933 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 16:45:07,935 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 16:45:07,936 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 16:45:07,938 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 16:45:07,939 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 16:45:07,940 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 16:45:07,940 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 16:45:07,941 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 16:45:07,943 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 16:45:07,944 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 16:45:07,945 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-23 16:45:07,997 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 16:45:07,997 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 16:45:07,998 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 16:45:07,998 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 16:45:07,999 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 16:45:08,000 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 16:45:08,000 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 16:45:08,000 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 16:45:08,001 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 16:45:08,001 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 16:45:08,002 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 16:45:08,003 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 16:45:08,004 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 16:45:08,005 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 16:45:08,005 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 16:45:08,005 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 16:45:08,006 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-23 16:45:08,006 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 16:45:08,006 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 16:45:08,007 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 16:45:08,007 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-23 16:45:08,007 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-23 16:45:08,007 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-23 16:45:08,008 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 16:45:08,008 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 16:45:08,008 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 16:45:08,009 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 16:45:08,009 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 16:45:08,009 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 16:45:08,010 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 16:45:08,010 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 16:45:08,011 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 16:45:08,011 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:45:08,012 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 16:45:08,012 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 16:45:08,012 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 16:45:08,013 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 16:45:08,013 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 16:45:08,013 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 16:45:08,013 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_95a64f07-c549-4cad-b9b3-ed18e14ce19f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bfd8ca9d9dda86f57445168715d124831c95b647e7c1b1093bb129b0384cce9e [2021-11-23 16:45:08,452 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 16:45:08,483 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 16:45:08,486 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 16:45:08,488 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 16:45:08,490 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 16:45:08,491 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/array-memsafety/cstrcat-alloca-2.i [2021-11-23 16:45:08,579 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/data/9b5c24e92/1d51da13447a4c2588c53e29c309cb26/FLAG46615e700 [2021-11-23 16:45:09,239 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 16:45:09,240 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/sv-benchmarks/c/array-memsafety/cstrcat-alloca-2.i [2021-11-23 16:45:09,256 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/data/9b5c24e92/1d51da13447a4c2588c53e29c309cb26/FLAG46615e700 [2021-11-23 16:45:09,497 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/data/9b5c24e92/1d51da13447a4c2588c53e29c309cb26 [2021-11-23 16:45:09,499 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 16:45:09,501 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 16:45:09,503 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 16:45:09,503 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 16:45:09,507 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 16:45:09,508 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:45:09" (1/1) ... [2021-11-23 16:45:09,509 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@152aa2f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:09, skipping insertion in model container [2021-11-23 16:45:09,509 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:45:09" (1/1) ... [2021-11-23 16:45:09,517 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 16:45:09,568 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 16:45:09,997 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:45:10,011 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 16:45:10,066 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:45:10,096 INFO L208 MainTranslator]: Completed translation [2021-11-23 16:45:10,096 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:10 WrapperNode [2021-11-23 16:45:10,097 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 16:45:10,098 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 16:45:10,098 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 16:45:10,098 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 16:45:10,106 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:10" (1/1) ... [2021-11-23 16:45:10,123 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:10" (1/1) ... [2021-11-23 16:45:10,148 INFO L137 Inliner]: procedures = 118, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 90 [2021-11-23 16:45:10,152 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 16:45:10,153 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 16:45:10,154 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 16:45:10,155 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 16:45:10,164 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:10" (1/1) ... [2021-11-23 16:45:10,165 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:10" (1/1) ... [2021-11-23 16:45:10,186 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:10" (1/1) ... [2021-11-23 16:45:10,187 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:10" (1/1) ... [2021-11-23 16:45:10,195 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:10" (1/1) ... [2021-11-23 16:45:10,208 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:10" (1/1) ... [2021-11-23 16:45:10,211 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:10" (1/1) ... [2021-11-23 16:45:10,214 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 16:45:10,215 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 16:45:10,215 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 16:45:10,216 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 16:45:10,217 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:10" (1/1) ... [2021-11-23 16:45:10,232 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:45:10,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:45:10,259 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 16:45:10,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 16:45:10,317 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-23 16:45:10,318 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 16:45:10,318 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-23 16:45:10,318 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 16:45:10,320 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 16:45:10,321 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 16:45:10,460 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 16:45:10,461 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 16:45:10,850 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 16:45:10,857 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 16:45:10,858 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-23 16:45:10,860 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:45:10 BoogieIcfgContainer [2021-11-23 16:45:10,860 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 16:45:10,862 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 16:45:10,863 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 16:45:10,866 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 16:45:10,866 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 04:45:09" (1/3) ... [2021-11-23 16:45:10,867 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c545875 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:45:10, skipping insertion in model container [2021-11-23 16:45:10,867 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:10" (2/3) ... [2021-11-23 16:45:10,868 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c545875 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:45:10, skipping insertion in model container [2021-11-23 16:45:10,868 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:45:10" (3/3) ... [2021-11-23 16:45:10,870 INFO L111 eAbstractionObserver]: Analyzing ICFG cstrcat-alloca-2.i [2021-11-23 16:45:10,876 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 16:45:10,879 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2021-11-23 16:45:10,929 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 16:45:10,937 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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 16:45:10,937 INFO L340 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2021-11-23 16:45:10,959 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 43 states have internal predecessors, (55), 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 16:45:10,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-23 16:45:10,966 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:45:10,967 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:45:10,967 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 16:45:10,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:45:10,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1805031098, now seen corresponding path program 1 times [2021-11-23 16:45:10,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:45:10,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1885302389] [2021-11-23 16:45:10,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:10,989 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:45:10,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:45:10,992 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:45:11,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 16:45:11,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:11,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 17 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 16:45:11,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:11,207 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 16:45:11,207 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:45:11,208 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:45:11,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1885302389] [2021-11-23 16:45:11,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1885302389] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:45:11,209 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:45:11,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 16:45:11,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262552362] [2021-11-23 16:45:11,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:45:11,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 16:45:11,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:45:11,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 16:45:11,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:45:11,253 INFO L87 Difference]: Start difference. First operand has 44 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 43 states have internal predecessors, (55), 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 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:11,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:45:11,470 INFO L93 Difference]: Finished difference Result 164 states and 185 transitions. [2021-11-23 16:45:11,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 16:45:11,474 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-23 16:45:11,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:45:11,501 INFO L225 Difference]: With dead ends: 164 [2021-11-23 16:45:11,501 INFO L226 Difference]: Without dead ends: 156 [2021-11-23 16:45:11,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:45:11,507 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 173 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 16:45:11,508 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 157 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 16:45:11,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-11-23 16:45:11,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 45. [2021-11-23 16:45:11,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 30 states have (on average 1.8) internal successors, (54), 44 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:11,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 54 transitions. [2021-11-23 16:45:11,557 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 54 transitions. Word has length 7 [2021-11-23 16:45:11,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:45:11,557 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 54 transitions. [2021-11-23 16:45:11,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:11,558 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 54 transitions. [2021-11-23 16:45:11,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-23 16:45:11,559 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:45:11,559 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:45:11,571 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 16:45:11,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:45:11,771 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 16:45:11,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:45:11,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1805033020, now seen corresponding path program 1 times [2021-11-23 16:45:11,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:45:11,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [445971962] [2021-11-23 16:45:11,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:11,773 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:45:11,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:45:11,774 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:45:11,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 16:45:11,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:11,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 16 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:45:11,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:11,876 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 16:45:11,877 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:45:11,877 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:45:11,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [445971962] [2021-11-23 16:45:11,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [445971962] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:45:11,878 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:45:11,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 16:45:11,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943066233] [2021-11-23 16:45:11,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:45:11,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:45:11,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:45:11,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:45:11,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:45:11,882 INFO L87 Difference]: Start difference. First operand 45 states and 54 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:11,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:45:11,949 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2021-11-23 16:45:11,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:45:11,950 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-23 16:45:11,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:45:11,951 INFO L225 Difference]: With dead ends: 46 [2021-11-23 16:45:11,952 INFO L226 Difference]: Without dead ends: 45 [2021-11-23 16:45:11,952 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 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 16:45:11,954 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 3 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:45:11,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 71 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 16:45:11,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-11-23 16:45:11,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2021-11-23 16:45:11,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 41 states have internal predecessors, (48), 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 16:45:11,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2021-11-23 16:45:11,962 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 7 [2021-11-23 16:45:11,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:45:11,963 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2021-11-23 16:45:11,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:11,963 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2021-11-23 16:45:11,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-23 16:45:11,964 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:45:11,964 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:45:11,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 16:45:12,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:45:12,165 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 16:45:12,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:45:12,166 INFO L85 PathProgramCache]: Analyzing trace with hash 121388915, now seen corresponding path program 1 times [2021-11-23 16:45:12,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:45:12,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1100819368] [2021-11-23 16:45:12,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:12,167 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:45:12,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:45:12,168 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:45:12,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 16:45:12,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:12,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 16:45:12,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:12,298 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 16:45:12,299 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:45:12,299 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:45:12,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1100819368] [2021-11-23 16:45:12,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1100819368] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:45:12,300 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:45:12,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:45:12,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331028728] [2021-11-23 16:45:12,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:45:12,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 16:45:12,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:45:12,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 16:45:12,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 16:45:12,303 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:12,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:45:12,355 INFO L93 Difference]: Finished difference Result 76 states and 86 transitions. [2021-11-23 16:45:12,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 16:45:12,357 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-23 16:45:12,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:45:12,358 INFO L225 Difference]: With dead ends: 76 [2021-11-23 16:45:12,358 INFO L226 Difference]: Without dead ends: 76 [2021-11-23 16:45:12,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 16:45:12,360 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 69 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:45:12,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 88 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:45:12,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-11-23 16:45:12,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 46. [2021-11-23 16:45:12,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 45 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:12,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2021-11-23 16:45:12,369 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 8 [2021-11-23 16:45:12,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:45:12,369 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2021-11-23 16:45:12,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:12,369 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2021-11-23 16:45:12,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-23 16:45:12,370 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:45:12,370 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:45:12,383 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-23 16:45:12,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:45:12,571 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 16:45:12,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:45:12,572 INFO L85 PathProgramCache]: Analyzing trace with hash 178647217, now seen corresponding path program 1 times [2021-11-23 16:45:12,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:45:12,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1085827654] [2021-11-23 16:45:12,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:12,573 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:45:12,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:45:12,574 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:45:12,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-23 16:45:12,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:12,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 16:45:12,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:12,815 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 16:45:12,815 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:45:12,816 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:45:12,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1085827654] [2021-11-23 16:45:12,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1085827654] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:45:12,816 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:45:12,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 16:45:12,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759329629] [2021-11-23 16:45:12,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:45:12,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 16:45:12,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:45:12,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 16:45:12,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-23 16:45:12,819 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:13,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:45:13,072 INFO L93 Difference]: Finished difference Result 121 states and 136 transitions. [2021-11-23 16:45:13,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 16:45:13,074 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-23 16:45:13,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:45:13,075 INFO L225 Difference]: With dead ends: 121 [2021-11-23 16:45:13,077 INFO L226 Difference]: Without dead ends: 121 [2021-11-23 16:45:13,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-23 16:45:13,080 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 196 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 16:45:13,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 141 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 16:45:13,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-11-23 16:45:13,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 47. [2021-11-23 16:45:13,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 32 states have (on average 1.75) internal successors, (56), 46 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:13,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2021-11-23 16:45:13,097 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 8 [2021-11-23 16:45:13,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:45:13,097 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2021-11-23 16:45:13,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:13,098 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2021-11-23 16:45:13,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-23 16:45:13,099 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:45:13,099 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:45:13,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-23 16:45:13,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:45:13,310 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 16:45:13,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:45:13,311 INFO L85 PathProgramCache]: Analyzing trace with hash 178706799, now seen corresponding path program 1 times [2021-11-23 16:45:13,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:45:13,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1230741753] [2021-11-23 16:45:13,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:13,312 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:45:13,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:45:13,313 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:45:13,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 16:45:13,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:13,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 16:45:13,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:13,533 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 16:45:13,533 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:45:13,534 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:45:13,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1230741753] [2021-11-23 16:45:13,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1230741753] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:45:13,534 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:45:13,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 16:45:13,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569517971] [2021-11-23 16:45:13,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:45:13,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 16:45:13,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:45:13,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 16:45:13,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-23 16:45:13,536 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:13,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:45:13,622 INFO L93 Difference]: Finished difference Result 52 states and 62 transitions. [2021-11-23 16:45:13,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 16:45:13,623 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-23 16:45:13,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:45:13,625 INFO L225 Difference]: With dead ends: 52 [2021-11-23 16:45:13,625 INFO L226 Difference]: Without dead ends: 52 [2021-11-23 16:45:13,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-23 16:45:13,626 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 16 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:45:13,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 94 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 8 Unchecked, 0.0s Time] [2021-11-23 16:45:13,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-11-23 16:45:13,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 46. [2021-11-23 16:45:13,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 45 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:13,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2021-11-23 16:45:13,632 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 8 [2021-11-23 16:45:13,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:45:13,632 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2021-11-23 16:45:13,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:13,633 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2021-11-23 16:45:13,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-23 16:45:13,633 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:45:13,633 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:45:13,644 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-23 16:45:13,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:45:13,845 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 16:45:13,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:45:13,845 INFO L85 PathProgramCache]: Analyzing trace with hash 180494259, now seen corresponding path program 1 times [2021-11-23 16:45:13,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:45:13,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [750268979] [2021-11-23 16:45:13,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:13,846 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:45:13,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:45:13,847 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:45:13,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 16:45:13,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:13,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 16:45:13,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:13,989 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-23 16:45:13,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2021-11-23 16:45:14,071 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 16:45:14,071 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:45:14,071 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:45:14,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [750268979] [2021-11-23 16:45:14,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [750268979] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:45:14,072 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:45:14,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 16:45:14,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69571759] [2021-11-23 16:45:14,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:45:14,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:45:14,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:45:14,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:45:14,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:45:14,074 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:14,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:45:14,076 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2021-11-23 16:45:14,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:45:14,076 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-23 16:45:14,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:45:14,077 INFO L225 Difference]: With dead ends: 53 [2021-11-23 16:45:14,077 INFO L226 Difference]: Without dead ends: 53 [2021-11-23 16:45:14,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 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 16:45:14,078 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 5 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:45:14,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 67 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 21 Unchecked, 0.0s Time] [2021-11-23 16:45:14,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-23 16:45:14,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 48. [2021-11-23 16:45:14,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 47 states have internal predecessors, (58), 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 16:45:14,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2021-11-23 16:45:14,083 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 8 [2021-11-23 16:45:14,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:45:14,083 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2021-11-23 16:45:14,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:14,084 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2021-11-23 16:45:14,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-23 16:45:14,089 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:45:14,089 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:45:14,104 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-23 16:45:14,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:45:14,302 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 16:45:14,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:45:14,303 INFO L85 PathProgramCache]: Analyzing trace with hash 180494260, now seen corresponding path program 1 times [2021-11-23 16:45:14,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:45:14,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [551958575] [2021-11-23 16:45:14,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:14,304 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:45:14,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:45:14,305 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:45:14,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-23 16:45:14,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:14,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 16:45:14,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:14,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:45:14,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-23 16:45:14,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2021-11-23 16:45:14,516 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 16:45:14,516 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:45:14,516 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:45:14,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [551958575] [2021-11-23 16:45:14,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [551958575] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:45:14,517 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:45:14,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:45:14,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374394510] [2021-11-23 16:45:14,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:45:14,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 16:45:14,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:45:14,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 16:45:14,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 16:45:14,519 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:14,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:45:14,731 INFO L93 Difference]: Finished difference Result 80 states and 91 transitions. [2021-11-23 16:45:14,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 16:45:14,733 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-23 16:45:14,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:45:14,734 INFO L225 Difference]: With dead ends: 80 [2021-11-23 16:45:14,734 INFO L226 Difference]: Without dead ends: 80 [2021-11-23 16:45:14,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:45:14,735 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 113 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 16:45:14,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 56 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 16:45:14,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-23 16:45:14,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 48. [2021-11-23 16:45:14,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 33 states have (on average 1.7272727272727273) internal successors, (57), 47 states have internal predecessors, (57), 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 16:45:14,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2021-11-23 16:45:14,741 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 8 [2021-11-23 16:45:14,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:45:14,741 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2021-11-23 16:45:14,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:14,742 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2021-11-23 16:45:14,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-23 16:45:14,742 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:45:14,743 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:45:14,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-23 16:45:14,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:45:14,953 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 16:45:14,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:45:14,954 INFO L85 PathProgramCache]: Analyzing trace with hash 690580010, now seen corresponding path program 1 times [2021-11-23 16:45:14,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:45:14,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [687585163] [2021-11-23 16:45:14,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:14,955 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:45:14,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:45:14,958 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:45:14,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-23 16:45:15,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:15,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 16:45:15,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:15,043 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 16:45:15,044 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:45:15,044 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:45:15,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [687585163] [2021-11-23 16:45:15,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [687585163] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:45:15,044 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:45:15,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:45:15,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938582254] [2021-11-23 16:45:15,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:45:15,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 16:45:15,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:45:15,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 16:45:15,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 16:45:15,047 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 16:45:15,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:45:15,118 INFO L93 Difference]: Finished difference Result 87 states and 99 transitions. [2021-11-23 16:45:15,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 16:45:15,120 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-23 16:45:15,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:45:15,120 INFO L225 Difference]: With dead ends: 87 [2021-11-23 16:45:15,121 INFO L226 Difference]: Without dead ends: 87 [2021-11-23 16:45:15,121 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 16:45:15,122 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 38 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:45:15,122 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 173 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 16:45:15,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-11-23 16:45:15,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 53. [2021-11-23 16:45:15,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 38 states have (on average 1.6578947368421053) internal successors, (63), 52 states have internal predecessors, (63), 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 16:45:15,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 63 transitions. [2021-11-23 16:45:15,127 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 63 transitions. Word has length 10 [2021-11-23 16:45:15,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:45:15,128 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 63 transitions. [2021-11-23 16:45:15,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 16:45:15,128 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 63 transitions. [2021-11-23 16:45:15,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-23 16:45:15,129 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:45:15,129 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:45:15,143 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-23 16:45:15,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:45:15,343 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 16:45:15,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:45:15,344 INFO L85 PathProgramCache]: Analyzing trace with hash 690580063, now seen corresponding path program 1 times [2021-11-23 16:45:15,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:45:15,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [928681635] [2021-11-23 16:45:15,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:15,344 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:45:15,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:45:15,345 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:45:15,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-23 16:45:15,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:15,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 16:45:15,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:15,424 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-11-23 16:45:15,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 18 [2021-11-23 16:45:15,443 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 16:45:15,443 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:45:15,443 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:45:15,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [928681635] [2021-11-23 16:45:15,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [928681635] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:45:15,443 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:45:15,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 16:45:15,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555354723] [2021-11-23 16:45:15,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:45:15,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:45:15,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:45:15,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:45:15,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:45:15,445 INFO L87 Difference]: Start difference. First operand 53 states and 63 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 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 16:45:15,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:45:15,518 INFO L93 Difference]: Finished difference Result 51 states and 61 transitions. [2021-11-23 16:45:15,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:45:15,518 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-23 16:45:15,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:45:15,519 INFO L225 Difference]: With dead ends: 51 [2021-11-23 16:45:15,519 INFO L226 Difference]: Without dead ends: 51 [2021-11-23 16:45:15,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 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 16:45:15,520 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 32 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:45:15,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 36 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 16:45:15,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-11-23 16:45:15,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-11-23 16:45:15,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 38 states have (on average 1.605263157894737) internal successors, (61), 50 states have internal predecessors, (61), 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 16:45:15,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2021-11-23 16:45:15,524 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 10 [2021-11-23 16:45:15,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:45:15,524 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2021-11-23 16:45:15,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 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 16:45:15,525 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2021-11-23 16:45:15,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-23 16:45:15,525 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:45:15,525 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:45:15,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-23 16:45:15,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:45:15,734 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 16:45:15,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:45:15,735 INFO L85 PathProgramCache]: Analyzing trace with hash 690580064, now seen corresponding path program 1 times [2021-11-23 16:45:15,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:45:15,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1203696487] [2021-11-23 16:45:15,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:15,735 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:45:15,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:45:15,736 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:45:15,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-23 16:45:15,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:15,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:45:15,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:15,843 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 16:45:15,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 16:45:15,904 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 16:45:15,905 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:45:15,906 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:45:15,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1203696487] [2021-11-23 16:45:15,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1203696487] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:45:15,906 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:45:15,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:45:15,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752933175] [2021-11-23 16:45:15,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:45:15,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 16:45:15,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:45:15,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 16:45:15,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:45:15,909 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 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 16:45:16,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:45:16,111 INFO L93 Difference]: Finished difference Result 81 states and 93 transitions. [2021-11-23 16:45:16,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 16:45:16,113 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-23 16:45:16,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:45:16,113 INFO L225 Difference]: With dead ends: 81 [2021-11-23 16:45:16,114 INFO L226 Difference]: Without dead ends: 81 [2021-11-23 16:45:16,114 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-23 16:45:16,115 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 71 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 16:45:16,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 137 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 16:45:16,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-11-23 16:45:16,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 52. [2021-11-23 16:45:16,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 39 states have (on average 1.5897435897435896) internal successors, (62), 51 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:16,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2021-11-23 16:45:16,119 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 10 [2021-11-23 16:45:16,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:45:16,119 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2021-11-23 16:45:16,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 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 16:45:16,119 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2021-11-23 16:45:16,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-23 16:45:16,120 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:45:16,120 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:45:16,134 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-23 16:45:16,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:45:16,331 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 16:45:16,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:45:16,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1829379924, now seen corresponding path program 1 times [2021-11-23 16:45:16,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:45:16,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [43449084] [2021-11-23 16:45:16,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:16,332 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:45:16,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:45:16,333 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:45:16,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-23 16:45:16,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:16,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 16:45:16,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:16,415 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 16:45:16,416 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:45:16,416 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:45:16,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [43449084] [2021-11-23 16:45:16,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [43449084] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:45:16,417 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:45:16,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:45:16,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906326236] [2021-11-23 16:45:16,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:45:16,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 16:45:16,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:45:16,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 16:45:16,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 16:45:16,419 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 16:45:16,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:45:16,466 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2021-11-23 16:45:16,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 16:45:16,467 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-23 16:45:16,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:45:16,468 INFO L225 Difference]: With dead ends: 57 [2021-11-23 16:45:16,468 INFO L226 Difference]: Without dead ends: 57 [2021-11-23 16:45:16,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 16:45:16,469 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 41 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:45:16,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 79 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:45:16,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-11-23 16:45:16,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 53. [2021-11-23 16:45:16,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 40 states have (on average 1.575) internal successors, (63), 52 states have internal predecessors, (63), 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 16:45:16,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 63 transitions. [2021-11-23 16:45:16,473 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 63 transitions. Word has length 10 [2021-11-23 16:45:16,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:45:16,474 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 63 transitions. [2021-11-23 16:45:16,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 16:45:16,474 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 63 transitions. [2021-11-23 16:45:16,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-23 16:45:16,474 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:45:16,475 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:45:16,490 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-23 16:45:16,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:45:16,675 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 16:45:16,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:45:16,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1829379870, now seen corresponding path program 1 times [2021-11-23 16:45:16,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:45:16,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [314625118] [2021-11-23 16:45:16,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:16,676 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:45:16,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:45:16,677 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:45:16,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-23 16:45:16,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:16,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:45:16,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:16,784 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 16:45:16,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 16:45:16,845 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 16:45:16,845 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:45:16,846 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:45:16,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [314625118] [2021-11-23 16:45:16,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [314625118] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:45:16,846 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:45:16,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:45:16,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14497084] [2021-11-23 16:45:16,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:45:16,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 16:45:16,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:45:16,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 16:45:16,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:45:16,848 INFO L87 Difference]: Start difference. First operand 53 states and 63 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 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 16:45:17,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:45:17,008 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2021-11-23 16:45:17,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 16:45:17,009 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-23 16:45:17,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:45:17,010 INFO L225 Difference]: With dead ends: 56 [2021-11-23 16:45:17,010 INFO L226 Difference]: Without dead ends: 56 [2021-11-23 16:45:17,010 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 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 16:45:17,011 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 83 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:45:17,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 55 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 16:45:17,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-23 16:45:17,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 48. [2021-11-23 16:45:17,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 47 states have internal predecessors, (57), 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 16:45:17,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2021-11-23 16:45:17,014 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 10 [2021-11-23 16:45:17,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:45:17,015 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2021-11-23 16:45:17,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 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 16:45:17,015 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2021-11-23 16:45:17,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-23 16:45:17,016 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:45:17,016 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:45:17,037 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-23 16:45:17,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:45:17,229 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 16:45:17,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:45:17,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1736941834, now seen corresponding path program 1 times [2021-11-23 16:45:17,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:45:17,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1428681174] [2021-11-23 16:45:17,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:17,230 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:45:17,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:45:17,231 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:45:17,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-23 16:45:17,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:17,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:45:17,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:17,322 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:17,322 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:45:17,322 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:45:17,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1428681174] [2021-11-23 16:45:17,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1428681174] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:45:17,322 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:45:17,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 16:45:17,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207169409] [2021-11-23 16:45:17,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:45:17,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:45:17,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:45:17,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:45:17,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:45:17,324 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 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 16:45:17,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:45:17,397 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2021-11-23 16:45:17,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:45:17,398 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 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 12 [2021-11-23 16:45:17,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:45:17,399 INFO L225 Difference]: With dead ends: 46 [2021-11-23 16:45:17,399 INFO L226 Difference]: Without dead ends: 46 [2021-11-23 16:45:17,399 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 10 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 16:45:17,400 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 29 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:45:17,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 36 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 16:45:17,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-23 16:45:17,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-11-23 16:45:17,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 35 states have (on average 1.5714285714285714) internal successors, (55), 45 states have internal predecessors, (55), 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 16:45:17,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2021-11-23 16:45:17,403 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 12 [2021-11-23 16:45:17,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:45:17,403 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2021-11-23 16:45:17,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 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 16:45:17,404 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2021-11-23 16:45:17,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-23 16:45:17,404 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:45:17,404 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:45:17,425 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-23 16:45:17,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:45:17,620 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 16:45:17,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:45:17,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1736941833, now seen corresponding path program 1 times [2021-11-23 16:45:17,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:45:17,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [221643496] [2021-11-23 16:45:17,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:17,621 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:45:17,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:45:17,622 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:45:17,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-23 16:45:17,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:17,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 16:45:17,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:17,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:45:17,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-23 16:45:17,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-11-23 16:45:18,032 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:18,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:45:18,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:45:18,867 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:18,867 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:45:18,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [221643496] [2021-11-23 16:45:18,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [221643496] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:45:18,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1573340045] [2021-11-23 16:45:18,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:18,868 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:45:18,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:45:18,884 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:45:18,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-23 16:45:18,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:18,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 16:45:18,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:19,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:45:19,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-23 16:45:19,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-11-23 16:45:19,249 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:19,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:45:20,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:45:20,110 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:20,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1573340045] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:45:20,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554869131] [2021-11-23 16:45:20,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:20,111 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:45:20,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:45:20,117 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:45:20,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-23 16:45:20,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:20,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 16:45:20,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:20,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:45:20,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-23 16:45:20,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-11-23 16:45:20,367 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:20,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:45:20,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:45:20,665 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:20,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554869131] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:45:20,666 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:45:20,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5, 4] total 16 [2021-11-23 16:45:20,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018535730] [2021-11-23 16:45:20,666 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:45:20,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-23 16:45:20,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:45:20,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-23 16:45:20,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2021-11-23 16:45:20,668 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand has 17 states, 16 states have (on average 2.5625) internal successors, (41), 17 states have internal predecessors, (41), 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 16:45:23,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:45:23,439 INFO L93 Difference]: Finished difference Result 172 states and 192 transitions. [2021-11-23 16:45:23,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 16:45:23,442 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.5625) internal successors, (41), 17 states have internal predecessors, (41), 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 12 [2021-11-23 16:45:23,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:45:23,443 INFO L225 Difference]: With dead ends: 172 [2021-11-23 16:45:23,443 INFO L226 Difference]: Without dead ends: 172 [2021-11-23 16:45:23,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2021-11-23 16:45:23,444 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 760 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 760 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:45:23,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [760 Valid, 207 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-23 16:45:23,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-11-23 16:45:23,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 66. [2021-11-23 16:45:23,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 55 states have (on average 1.4545454545454546) internal successors, (80), 65 states have internal predecessors, (80), 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 16:45:23,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 80 transitions. [2021-11-23 16:45:23,450 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 80 transitions. Word has length 12 [2021-11-23 16:45:23,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:45:23,450 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 80 transitions. [2021-11-23 16:45:23,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.5625) internal successors, (41), 17 states have internal predecessors, (41), 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 16:45:23,451 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 80 transitions. [2021-11-23 16:45:23,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-23 16:45:23,451 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:45:23,451 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:45:23,474 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-23 16:45:23,658 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2021-11-23 16:45:23,863 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-23 16:45:24,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:45:24,057 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 16:45:24,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:45:24,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1202382883, now seen corresponding path program 1 times [2021-11-23 16:45:24,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:45:24,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [950204428] [2021-11-23 16:45:24,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:24,058 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:45:24,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:45:24,060 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:45:24,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-23 16:45:24,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:24,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 16:45:24,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:24,178 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:24,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:45:24,279 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:24,280 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:45:24,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [950204428] [2021-11-23 16:45:24,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [950204428] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:45:24,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1050382292] [2021-11-23 16:45:24,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:24,281 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:45:24,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:45:24,283 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:45:24,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-23 16:45:24,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:24,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 16:45:24,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:24,428 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:24,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:45:24,479 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:24,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1050382292] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:45:24,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422511868] [2021-11-23 16:45:24,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:24,480 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:45:24,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:45:24,485 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:45:24,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-23 16:45:24,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:24,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 16:45:24,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:24,599 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:24,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:45:24,652 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:24,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422511868] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:45:24,653 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:45:24,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2021-11-23 16:45:24,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845983519] [2021-11-23 16:45:24,653 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:45:24,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 16:45:24,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:45:24,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 16:45:24,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-23 16:45:24,654 INFO L87 Difference]: Start difference. First operand 66 states and 80 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 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 16:45:24,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:45:24,733 INFO L93 Difference]: Finished difference Result 95 states and 111 transitions. [2021-11-23 16:45:24,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 16:45:24,734 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 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 14 [2021-11-23 16:45:24,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:45:24,735 INFO L225 Difference]: With dead ends: 95 [2021-11-23 16:45:24,735 INFO L226 Difference]: Without dead ends: 95 [2021-11-23 16:45:24,736 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-23 16:45:24,736 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 120 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:45:24,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 157 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 16:45:24,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-11-23 16:45:24,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 75. [2021-11-23 16:45:24,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 64 states have (on average 1.40625) internal successors, (90), 74 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:24,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 90 transitions. [2021-11-23 16:45:24,740 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 90 transitions. Word has length 14 [2021-11-23 16:45:24,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:45:24,741 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 90 transitions. [2021-11-23 16:45:24,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 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 16:45:24,741 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 90 transitions. [2021-11-23 16:45:24,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-23 16:45:24,742 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:45:24,742 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:45:24,756 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-23 16:45:24,954 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-11-23 16:45:25,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-23 16:45:25,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:45:25,353 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 16:45:25,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:45:25,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1903447461, now seen corresponding path program 1 times [2021-11-23 16:45:25,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:45:25,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1767424291] [2021-11-23 16:45:25,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:25,354 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:45:25,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:45:25,368 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:45:25,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-23 16:45:25,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:25,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 16:45:25,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:25,481 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 16:45:25,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 16:45:25,606 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:25,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:45:26,045 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:26,045 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:45:26,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1767424291] [2021-11-23 16:45:26,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1767424291] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:45:26,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1935070580] [2021-11-23 16:45:26,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:26,046 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:45:26,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:45:26,053 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:45:26,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-11-23 16:45:26,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:26,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 16:45:26,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:26,211 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 16:45:26,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 16:45:26,282 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:26,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:45:26,457 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:26,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1935070580] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:45:26,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575073659] [2021-11-23 16:45:26,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:26,458 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:45:26,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:45:26,460 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:45:26,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-23 16:45:26,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:26,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 16:45:26,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:26,561 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 16:45:26,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 16:45:26,637 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:26,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:45:26,824 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:26,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575073659] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:45:26,824 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:45:26,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 9 [2021-11-23 16:45:26,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58947697] [2021-11-23 16:45:26,825 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:45:26,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 16:45:26,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:45:26,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 16:45:26,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-23 16:45:26,827 INFO L87 Difference]: Start difference. First operand 75 states and 90 transitions. Second operand has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:27,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:45:27,281 INFO L93 Difference]: Finished difference Result 109 states and 127 transitions. [2021-11-23 16:45:27,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 16:45:27,282 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-23 16:45:27,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:45:27,283 INFO L225 Difference]: With dead ends: 109 [2021-11-23 16:45:27,283 INFO L226 Difference]: Without dead ends: 109 [2021-11-23 16:45:27,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-11-23 16:45:27,284 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 307 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 16:45:27,285 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [307 Valid, 82 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 16:45:27,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-11-23 16:45:27,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 83. [2021-11-23 16:45:27,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 72 states have (on average 1.3888888888888888) internal successors, (100), 82 states have internal predecessors, (100), 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 16:45:27,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 100 transitions. [2021-11-23 16:45:27,288 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 100 transitions. Word has length 14 [2021-11-23 16:45:27,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:45:27,288 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 100 transitions. [2021-11-23 16:45:27,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:27,289 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 100 transitions. [2021-11-23 16:45:27,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-23 16:45:27,289 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:45:27,289 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:45:27,305 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-23 16:45:27,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2021-11-23 16:45:27,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-23 16:45:27,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:45:27,899 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 16:45:27,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:45:27,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1380837930, now seen corresponding path program 1 times [2021-11-23 16:45:27,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:45:27,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1503415045] [2021-11-23 16:45:27,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:27,900 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:45:27,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:45:27,901 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:45:27,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-23 16:45:27,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:27,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:45:27,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:28,033 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 16:45:28,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 16:45:28,143 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:45:28,144 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:45:28,144 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:45:28,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1503415045] [2021-11-23 16:45:28,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1503415045] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:45:28,145 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:45:28,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:45:28,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392359175] [2021-11-23 16:45:28,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:45:28,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 16:45:28,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:45:28,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 16:45:28,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:45:28,147 INFO L87 Difference]: Start difference. First operand 83 states and 100 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:28,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:45:28,311 INFO L93 Difference]: Finished difference Result 130 states and 149 transitions. [2021-11-23 16:45:28,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 16:45:28,312 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-23 16:45:28,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:45:28,312 INFO L225 Difference]: With dead ends: 130 [2021-11-23 16:45:28,312 INFO L226 Difference]: Without dead ends: 130 [2021-11-23 16:45:28,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-23 16:45:28,313 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 78 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:45:28,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 126 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 16:45:28,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-11-23 16:45:28,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 93. [2021-11-23 16:45:28,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 82 states have (on average 1.3414634146341464) internal successors, (110), 92 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 16:45:28,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 110 transitions. [2021-11-23 16:45:28,317 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 110 transitions. Word has length 15 [2021-11-23 16:45:28,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:45:28,318 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 110 transitions. [2021-11-23 16:45:28,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:28,318 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 110 transitions. [2021-11-23 16:45:28,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-23 16:45:28,319 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:45:28,319 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:45:28,333 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-23 16:45:28,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:45:28,519 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 16:45:28,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:45:28,520 INFO L85 PathProgramCache]: Analyzing trace with hash -679773352, now seen corresponding path program 1 times [2021-11-23 16:45:28,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:45:28,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1146649331] [2021-11-23 16:45:28,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:28,520 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:45:28,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:45:28,521 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:45:28,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-23 16:45:28,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:28,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 16:45:28,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:28,701 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 16:45:28,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 16:45:28,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:45:28,859 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:45:28,859 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:45:28,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1146649331] [2021-11-23 16:45:28,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1146649331] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:45:28,859 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:45:28,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 16:45:28,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239723398] [2021-11-23 16:45:28,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:45:28,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 16:45:28,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:45:28,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 16:45:28,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-23 16:45:28,861 INFO L87 Difference]: Start difference. First operand 93 states and 110 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:29,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:45:29,053 INFO L93 Difference]: Finished difference Result 163 states and 185 transitions. [2021-11-23 16:45:29,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 16:45:29,054 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-23 16:45:29,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:45:29,055 INFO L225 Difference]: With dead ends: 163 [2021-11-23 16:45:29,055 INFO L226 Difference]: Without dead ends: 163 [2021-11-23 16:45:29,055 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-23 16:45:29,056 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 82 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 16:45:29,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 150 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 16:45:29,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-11-23 16:45:29,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 94. [2021-11-23 16:45:29,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 83 states have (on average 1.3493975903614457) internal successors, (112), 93 states have internal predecessors, (112), 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 16:45:29,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 112 transitions. [2021-11-23 16:45:29,061 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 112 transitions. Word has length 15 [2021-11-23 16:45:29,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:45:29,061 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 112 transitions. [2021-11-23 16:45:29,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:29,062 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 112 transitions. [2021-11-23 16:45:29,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-23 16:45:29,063 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:45:29,063 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:45:29,084 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-23 16:45:29,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:45:29,274 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 16:45:29,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:45:29,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1122672492, now seen corresponding path program 1 times [2021-11-23 16:45:29,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:45:29,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [750012996] [2021-11-23 16:45:29,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:29,275 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:45:29,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:45:29,276 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:45:29,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-23 16:45:29,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:29,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 16:45:29,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:29,384 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 16:45:29,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 16:45:29,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:29,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:45:30,128 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:30,128 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:45:30,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [750012996] [2021-11-23 16:45:30,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [750012996] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 16:45:30,128 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 16:45:30,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2021-11-23 16:45:30,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425029482] [2021-11-23 16:45:30,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:45:30,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 16:45:30,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:45:30,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 16:45:30,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-23 16:45:30,131 INFO L87 Difference]: Start difference. First operand 94 states and 112 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:30,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:45:30,829 INFO L93 Difference]: Finished difference Result 170 states and 199 transitions. [2021-11-23 16:45:30,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 16:45:30,830 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-23 16:45:30,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:45:30,831 INFO L225 Difference]: With dead ends: 170 [2021-11-23 16:45:30,832 INFO L226 Difference]: Without dead ends: 170 [2021-11-23 16:45:30,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-23 16:45:30,833 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 92 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 16:45:30,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 91 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 16:45:30,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-11-23 16:45:30,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 138. [2021-11-23 16:45:30,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 127 states have (on average 1.330708661417323) internal successors, (169), 137 states have internal predecessors, (169), 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 16:45:30,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 169 transitions. [2021-11-23 16:45:30,839 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 169 transitions. Word has length 15 [2021-11-23 16:45:30,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:45:30,840 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 169 transitions. [2021-11-23 16:45:30,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:30,840 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 169 transitions. [2021-11-23 16:45:30,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-23 16:45:30,841 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:45:30,841 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:45:30,860 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2021-11-23 16:45:31,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:45:31,052 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 16:45:31,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:45:31,053 INFO L85 PathProgramCache]: Analyzing trace with hash -421607914, now seen corresponding path program 1 times [2021-11-23 16:45:31,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:45:31,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [252326962] [2021-11-23 16:45:31,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:31,053 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:45:31,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:45:31,054 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:45:31,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-23 16:45:31,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:31,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 16:45:31,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:31,213 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 16:45:31,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 16:45:31,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:31,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:45:32,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:32,965 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:45:32,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [252326962] [2021-11-23 16:45:32,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [252326962] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:45:32,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [563730576] [2021-11-23 16:45:32,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:32,966 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:45:32,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:45:32,973 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:45:32,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-11-23 16:45:33,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:33,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 16:45:33,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:33,180 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 16:45:33,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 16:45:33,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:33,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:45:33,826 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:33,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [563730576] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:45:33,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244201023] [2021-11-23 16:45:33,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:33,827 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:45:33,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:45:33,832 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:45:33,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-23 16:45:33,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:33,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 16:45:33,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:34,014 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 16:45:34,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 16:45:34,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:34,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:45:35,110 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:35,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244201023] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:45:35,111 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:45:35,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8, 7, 7, 7] total 20 [2021-11-23 16:45:35,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673784637] [2021-11-23 16:45:35,111 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:45:35,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-23 16:45:35,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:45:35,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-23 16:45:35,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=294, Unknown=0, NotChecked=0, Total=420 [2021-11-23 16:45:35,113 INFO L87 Difference]: Start difference. First operand 138 states and 169 transitions. Second operand has 21 states, 20 states have (on average 2.0) internal successors, (40), 21 states have internal predecessors, (40), 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 16:45:36,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:45:36,289 INFO L93 Difference]: Finished difference Result 246 states and 286 transitions. [2021-11-23 16:45:36,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-23 16:45:36,294 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 21 states have internal predecessors, (40), 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 15 [2021-11-23 16:45:36,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:45:36,295 INFO L225 Difference]: With dead ends: 246 [2021-11-23 16:45:36,296 INFO L226 Difference]: Without dead ends: 246 [2021-11-23 16:45:36,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=208, Invalid=442, Unknown=0, NotChecked=0, Total=650 [2021-11-23 16:45:36,297 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 511 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 511 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-23 16:45:36,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [511 Valid, 189 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-23 16:45:36,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-11-23 16:45:36,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 82. [2021-11-23 16:45:36,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 72 states have (on average 1.375) internal successors, (99), 81 states have internal predecessors, (99), 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 16:45:36,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 99 transitions. [2021-11-23 16:45:36,304 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 99 transitions. Word has length 15 [2021-11-23 16:45:36,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:45:36,304 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 99 transitions. [2021-11-23 16:45:36,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 21 states have internal predecessors, (40), 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 16:45:36,304 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 99 transitions. [2021-11-23 16:45:36,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-23 16:45:36,305 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:45:36,305 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:45:36,314 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2021-11-23 16:45:36,513 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (28)] Ended with exit code 0 [2021-11-23 16:45:36,733 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-11-23 16:45:36,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:45:36,913 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 16:45:36,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:45:36,913 INFO L85 PathProgramCache]: Analyzing trace with hash 159643962, now seen corresponding path program 1 times [2021-11-23 16:45:36,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:45:36,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2071550040] [2021-11-23 16:45:36,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:36,914 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:45:36,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:45:36,915 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:45:36,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-23 16:45:36,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:36,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 16:45:36,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:37,001 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-11-23 16:45:37,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 18 [2021-11-23 16:45:37,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:45:37,036 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:45:37,036 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:45:37,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2071550040] [2021-11-23 16:45:37,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2071550040] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:45:37,037 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:45:37,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:45:37,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551625344] [2021-11-23 16:45:37,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:45:37,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 16:45:37,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:45:37,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 16:45:37,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 16:45:37,038 INFO L87 Difference]: Start difference. First operand 82 states and 99 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 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 16:45:37,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:45:37,106 INFO L93 Difference]: Finished difference Result 81 states and 98 transitions. [2021-11-23 16:45:37,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 16:45:37,107 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 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 17 [2021-11-23 16:45:37,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:45:37,107 INFO L225 Difference]: With dead ends: 81 [2021-11-23 16:45:37,107 INFO L226 Difference]: Without dead ends: 81 [2021-11-23 16:45:37,107 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:45:37,108 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 32 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:45:37,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 50 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 16:45:37,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-11-23 16:45:37,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-11-23 16:45:37,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 72 states have (on average 1.3611111111111112) internal successors, (98), 80 states have internal predecessors, (98), 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 16:45:37,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 98 transitions. [2021-11-23 16:45:37,112 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 98 transitions. Word has length 17 [2021-11-23 16:45:37,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:45:37,112 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 98 transitions. [2021-11-23 16:45:37,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 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 16:45:37,112 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 98 transitions. [2021-11-23 16:45:37,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-23 16:45:37,113 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:45:37,113 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:45:37,127 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-23 16:45:37,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:45:37,324 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 16:45:37,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:45:37,325 INFO L85 PathProgramCache]: Analyzing trace with hash 159643963, now seen corresponding path program 1 times [2021-11-23 16:45:37,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:45:37,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1085022335] [2021-11-23 16:45:37,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:37,325 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:45:37,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:45:37,326 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:45:37,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-23 16:45:37,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:37,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 16:45:37,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:37,468 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 16:45:37,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 16:45:37,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:45:37,562 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:45:37,563 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:45:37,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1085022335] [2021-11-23 16:45:37,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1085022335] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:45:37,563 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:45:37,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:45:37,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422658561] [2021-11-23 16:45:37,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:45:37,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 16:45:37,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:45:37,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 16:45:37,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:45:37,564 INFO L87 Difference]: Start difference. First operand 81 states and 98 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 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 16:45:37,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:45:37,758 INFO L93 Difference]: Finished difference Result 102 states and 121 transitions. [2021-11-23 16:45:37,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 16:45:37,762 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 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 17 [2021-11-23 16:45:37,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:45:37,763 INFO L225 Difference]: With dead ends: 102 [2021-11-23 16:45:37,763 INFO L226 Difference]: Without dead ends: 102 [2021-11-23 16:45:37,763 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 16:45:37,764 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 51 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 16:45:37,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 114 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 16:45:37,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-11-23 16:45:37,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 85. [2021-11-23 16:45:37,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 76 states have (on average 1.3421052631578947) internal successors, (102), 84 states have internal predecessors, (102), 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 16:45:37,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 102 transitions. [2021-11-23 16:45:37,768 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 102 transitions. Word has length 17 [2021-11-23 16:45:37,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:45:37,768 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 102 transitions. [2021-11-23 16:45:37,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 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 16:45:37,773 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 102 transitions. [2021-11-23 16:45:37,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-23 16:45:37,775 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:45:37,775 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:45:37,788 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (31)] Ended with exit code 0 [2021-11-23 16:45:37,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:45:37,984 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 16:45:37,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:45:37,985 INFO L85 PathProgramCache]: Analyzing trace with hash -851473287, now seen corresponding path program 1 times [2021-11-23 16:45:37,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:45:37,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1621259713] [2021-11-23 16:45:37,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:37,985 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:45:37,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:45:37,986 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:45:37,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-23 16:45:38,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:38,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 16:45:38,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:38,103 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 16:45:38,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 16:45:38,229 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:38,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:45:38,523 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:38,523 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:45:38,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1621259713] [2021-11-23 16:45:38,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1621259713] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 16:45:38,524 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 16:45:38,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2021-11-23 16:45:38,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238572295] [2021-11-23 16:45:38,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:45:38,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 16:45:38,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:45:38,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 16:45:38,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-23 16:45:38,526 INFO L87 Difference]: Start difference. First operand 85 states and 102 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 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 16:45:38,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:45:38,843 INFO L93 Difference]: Finished difference Result 87 states and 104 transitions. [2021-11-23 16:45:38,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 16:45:38,845 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 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 17 [2021-11-23 16:45:38,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:45:38,845 INFO L225 Difference]: With dead ends: 87 [2021-11-23 16:45:38,846 INFO L226 Difference]: Without dead ends: 87 [2021-11-23 16:45:38,846 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-23 16:45:38,847 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 60 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 16:45:38,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 75 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 16:45:38,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-11-23 16:45:38,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 82. [2021-11-23 16:45:38,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 73 states have (on average 1.356164383561644) internal successors, (99), 81 states have internal predecessors, (99), 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 16:45:38,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 99 transitions. [2021-11-23 16:45:38,851 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 99 transitions. Word has length 17 [2021-11-23 16:45:38,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:45:38,851 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 99 transitions. [2021-11-23 16:45:38,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 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 16:45:38,851 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 99 transitions. [2021-11-23 16:45:38,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-23 16:45:38,852 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:45:38,852 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:45:38,866 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-11-23 16:45:39,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:45:39,064 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 16:45:39,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:45:39,064 INFO L85 PathProgramCache]: Analyzing trace with hash -577199896, now seen corresponding path program 2 times [2021-11-23 16:45:39,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:45:39,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1777771111] [2021-11-23 16:45:39,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 16:45:39,065 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:45:39,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:45:39,066 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:45:39,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-23 16:45:39,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 16:45:39,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:45:39,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 16:45:39,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:39,183 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 16:45:39,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 16:45:39,436 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:39,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:45:40,690 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:40,691 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:45:40,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1777771111] [2021-11-23 16:45:40,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1777771111] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:45:40,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [865978318] [2021-11-23 16:45:40,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 16:45:40,691 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:45:40,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:45:40,692 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:45:40,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2021-11-23 16:45:40,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 16:45:40,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:45:40,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 16:45:40,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:40,855 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 16:45:40,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 16:45:41,147 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:41,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:45:43,249 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:43,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [865978318] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:45:43,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762622487] [2021-11-23 16:45:43,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 16:45:43,250 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:45:43,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:45:43,251 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:45:43,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-23 16:45:43,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 16:45:43,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:45:43,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 16:45:43,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:43,357 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 16:45:43,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 16:45:43,541 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:43,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:45:44,061 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:44,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762622487] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:45:44,061 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:45:44,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 8, 7, 7] total 21 [2021-11-23 16:45:44,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496088658] [2021-11-23 16:45:44,062 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:45:44,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-23 16:45:44,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:45:44,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-23 16:45:44,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2021-11-23 16:45:44,064 INFO L87 Difference]: Start difference. First operand 82 states and 99 transitions. Second operand has 22 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 22 states have internal predecessors, (53), 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 16:45:47,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:45:47,349 INFO L93 Difference]: Finished difference Result 158 states and 181 transitions. [2021-11-23 16:45:47,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-23 16:45:47,351 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 22 states have internal predecessors, (53), 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 18 [2021-11-23 16:45:47,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:45:47,352 INFO L225 Difference]: With dead ends: 158 [2021-11-23 16:45:47,352 INFO L226 Difference]: Without dead ends: 158 [2021-11-23 16:45:47,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=240, Invalid=572, Unknown=0, NotChecked=0, Total=812 [2021-11-23 16:45:47,353 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 538 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 538 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-23 16:45:47,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [538 Valid, 212 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-23 16:45:47,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-11-23 16:45:47,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 71. [2021-11-23 16:45:47,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 63 states have (on average 1.3492063492063493) internal successors, (85), 70 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:47,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 85 transitions. [2021-11-23 16:45:47,358 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 85 transitions. Word has length 18 [2021-11-23 16:45:47,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:45:47,359 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 85 transitions. [2021-11-23 16:45:47,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 22 states have internal predecessors, (53), 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 16:45:47,359 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 85 transitions. [2021-11-23 16:45:47,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-23 16:45:47,360 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:45:47,360 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:45:47,370 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-11-23 16:45:47,571 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (34)] Ended with exit code 0 [2021-11-23 16:45:47,791 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-23 16:45:47,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:45:47,971 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 16:45:47,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:45:47,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1200973612, now seen corresponding path program 1 times [2021-11-23 16:45:47,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:45:47,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [828796345] [2021-11-23 16:45:47,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:47,972 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:45:47,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:45:47,973 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:45:47,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-11-23 16:45:48,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:48,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 16:45:48,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:48,073 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 16:45:48,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 16:45:48,167 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:45:48,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:45:48,393 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:45:48,393 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:45:48,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [828796345] [2021-11-23 16:45:48,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [828796345] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:45:48,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [424069688] [2021-11-23 16:45:48,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:48,393 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:45:48,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:45:48,394 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:45:48,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2021-11-23 16:45:48,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:48,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 16:45:48,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:48,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-11-23 16:45:48,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-11-23 16:45:48,730 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:45:48,731 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:45:48,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [424069688] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:45:48,731 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 16:45:48,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5, 5] total 15 [2021-11-23 16:45:48,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138854037] [2021-11-23 16:45:48,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:45:48,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 16:45:48,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:45:48,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 16:45:48,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-11-23 16:45:48,733 INFO L87 Difference]: Start difference. First operand 71 states and 85 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:48,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:45:48,955 INFO L93 Difference]: Finished difference Result 139 states and 160 transitions. [2021-11-23 16:45:48,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 16:45:48,956 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-23 16:45:48,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:45:48,957 INFO L225 Difference]: With dead ends: 139 [2021-11-23 16:45:48,957 INFO L226 Difference]: Without dead ends: 139 [2021-11-23 16:45:48,957 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-11-23 16:45:48,958 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 69 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:45:48,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 164 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 16:45:48,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-11-23 16:45:48,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 118. [2021-11-23 16:45:48,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 110 states have (on average 1.2818181818181817) internal successors, (141), 117 states have internal predecessors, (141), 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 16:45:48,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 141 transitions. [2021-11-23 16:45:48,972 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 141 transitions. Word has length 19 [2021-11-23 16:45:48,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:45:48,972 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 141 transitions. [2021-11-23 16:45:48,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:48,974 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 141 transitions. [2021-11-23 16:45:48,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-23 16:45:48,975 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:45:48,975 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:45:48,990 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2021-11-23 16:45:49,181 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (37)] Forceful destruction successful, exit code 0 [2021-11-23 16:45:49,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 16:45:49,376 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 16:45:49,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:45:49,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1814130006, now seen corresponding path program 1 times [2021-11-23 16:45:49,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:45:49,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1427752417] [2021-11-23 16:45:49,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:49,377 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:45:49,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:45:49,378 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:45:49,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-11-23 16:45:49,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:49,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 16:45:49,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:49,487 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 16:45:49,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 16:45:49,605 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:45:49,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:45:49,971 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:45:49,971 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:45:49,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1427752417] [2021-11-23 16:45:49,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1427752417] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:45:49,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1337689756] [2021-11-23 16:45:49,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:49,972 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:45:49,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:45:49,977 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:45:49,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2021-11-23 16:45:50,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:50,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 16:45:50,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:50,185 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 16:45:50,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 16:45:50,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:45:50,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:45:50,448 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:45:50,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1337689756] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:45:50,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684433759] [2021-11-23 16:45:50,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:50,448 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:45:50,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:45:50,453 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:45:50,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-23 16:45:50,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:50,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 16:45:50,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:50,574 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 16:45:50,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 16:45:50,649 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:45:50,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:45:50,773 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:45:50,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684433759] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:45:50,773 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:45:50,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 9 [2021-11-23 16:45:50,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364202365] [2021-11-23 16:45:50,774 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:45:50,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 16:45:50,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:45:50,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 16:45:50,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-11-23 16:45:50,775 INFO L87 Difference]: Start difference. First operand 118 states and 141 transitions. Second operand has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 10 states have internal predecessors, (35), 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 16:45:51,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:45:51,823 INFO L93 Difference]: Finished difference Result 174 states and 201 transitions. [2021-11-23 16:45:51,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 16:45:51,824 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-23 16:45:51,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:45:51,825 INFO L225 Difference]: With dead ends: 174 [2021-11-23 16:45:51,825 INFO L226 Difference]: Without dead ends: 174 [2021-11-23 16:45:51,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2021-11-23 16:45:51,827 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 216 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 16:45:51,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 168 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 16:45:51,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-11-23 16:45:51,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 120. [2021-11-23 16:45:51,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 112 states have (on average 1.2857142857142858) internal successors, (144), 119 states have internal predecessors, (144), 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 16:45:51,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 144 transitions. [2021-11-23 16:45:51,832 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 144 transitions. Word has length 19 [2021-11-23 16:45:51,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:45:51,833 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 144 transitions. [2021-11-23 16:45:51,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 10 states have internal predecessors, (35), 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 16:45:51,833 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 144 transitions. [2021-11-23 16:45:51,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-23 16:45:51,834 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:45:51,834 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 16:45:51,843 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (38)] Ended with exit code 0 [2021-11-23 16:45:52,045 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (39)] Forceful destruction successful, exit code 0 [2021-11-23 16:45:52,261 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-11-23 16:45:52,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:45:52,441 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 16:45:52,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:45:52,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1424522230, now seen corresponding path program 1 times [2021-11-23 16:45:52,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:45:52,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [137050827] [2021-11-23 16:45:52,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:52,442 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:45:52,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:45:52,443 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:45:52,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-11-23 16:45:52,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:52,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 16:45:52,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:52,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:45:52,571 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:45:52,571 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:45:52,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [137050827] [2021-11-23 16:45:52,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [137050827] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:45:52,572 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:45:52,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:45:52,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895214145] [2021-11-23 16:45:52,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:45:52,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 16:45:52,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:45:52,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 16:45:52,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:45:52,573 INFO L87 Difference]: Start difference. First operand 120 states and 144 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 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 16:45:52,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:45:52,680 INFO L93 Difference]: Finished difference Result 119 states and 143 transitions. [2021-11-23 16:45:52,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 16:45:52,681 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 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 16:45:52,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:45:52,681 INFO L225 Difference]: With dead ends: 119 [2021-11-23 16:45:52,681 INFO L226 Difference]: Without dead ends: 119 [2021-11-23 16:45:52,682 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 16:45:52,682 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 41 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:45:52,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 66 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 16:45:52,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-11-23 16:45:52,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2021-11-23 16:45:52,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 112 states have (on average 1.2767857142857142) internal successors, (143), 118 states have internal predecessors, (143), 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 16:45:52,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 143 transitions. [2021-11-23 16:45:52,687 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 143 transitions. Word has length 20 [2021-11-23 16:45:52,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:45:52,687 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 143 transitions. [2021-11-23 16:45:52,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 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 16:45:52,687 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 143 transitions. [2021-11-23 16:45:52,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-23 16:45:52,688 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:45:52,688 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 16:45:52,699 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2021-11-23 16:45:52,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:45:52,892 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 16:45:52,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:45:52,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1424522231, now seen corresponding path program 1 times [2021-11-23 16:45:52,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:45:52,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [647157239] [2021-11-23 16:45:52,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:52,893 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:45:52,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:45:52,908 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:45:52,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2021-11-23 16:45:52,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:52,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 16:45:52,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:53,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:45:53,119 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:45:53,119 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:45:53,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [647157239] [2021-11-23 16:45:53,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [647157239] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:45:53,120 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:45:53,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 16:45:53,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598610145] [2021-11-23 16:45:53,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:45:53,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 16:45:53,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:45:53,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 16:45:53,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-23 16:45:53,121 INFO L87 Difference]: Start difference. First operand 119 states and 143 transitions. Second operand has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 7 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 16:45:53,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:45:53,345 INFO L93 Difference]: Finished difference Result 179 states and 209 transitions. [2021-11-23 16:45:53,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 16:45:53,345 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 7 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 16:45:53,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:45:53,346 INFO L225 Difference]: With dead ends: 179 [2021-11-23 16:45:53,346 INFO L226 Difference]: Without dead ends: 179 [2021-11-23 16:45:53,347 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-23 16:45:53,347 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 93 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 16:45:53,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 136 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 16:45:53,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-11-23 16:45:53,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 163. [2021-11-23 16:45:53,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 156 states have (on average 1.2371794871794872) internal successors, (193), 162 states have internal predecessors, (193), 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 16:45:53,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 193 transitions. [2021-11-23 16:45:53,353 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 193 transitions. Word has length 20 [2021-11-23 16:45:53,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:45:53,354 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 193 transitions. [2021-11-23 16:45:53,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 7 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 16:45:53,354 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 193 transitions. [2021-11-23 16:45:53,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-23 16:45:53,355 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:45:53,355 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 16:45:53,367 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2021-11-23 16:45:53,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:45:53,564 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 16:45:53,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:45:53,565 INFO L85 PathProgramCache]: Analyzing trace with hash -569622475, now seen corresponding path program 1 times [2021-11-23 16:45:53,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:45:53,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [109866497] [2021-11-23 16:45:53,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:53,566 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:45:53,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:45:53,567 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:45:53,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-11-23 16:45:53,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:53,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 16:45:53,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:53,954 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:45:53,954 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:45:53,955 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:45:53,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [109866497] [2021-11-23 16:45:53,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [109866497] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:45:53,955 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:45:53,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 16:45:53,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540194434] [2021-11-23 16:45:53,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:45:53,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 16:45:53,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:45:53,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 16:45:53,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-23 16:45:53,956 INFO L87 Difference]: Start difference. First operand 163 states and 193 transitions. Second operand has 9 states, 8 states have (on average 2.5) internal successors, (20), 9 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 16:45:54,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:45:54,110 INFO L93 Difference]: Finished difference Result 181 states and 211 transitions. [2021-11-23 16:45:54,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 16:45:54,112 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 9 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 16:45:54,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:45:54,113 INFO L225 Difference]: With dead ends: 181 [2021-11-23 16:45:54,113 INFO L226 Difference]: Without dead ends: 181 [2021-11-23 16:45:54,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-11-23 16:45:54,114 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 40 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:45:54,114 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 174 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 79 Unchecked, 0.1s Time] [2021-11-23 16:45:54,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-11-23 16:45:54,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 155. [2021-11-23 16:45:54,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 148 states have (on average 1.25) internal successors, (185), 154 states have internal predecessors, (185), 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 16:45:54,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 185 transitions. [2021-11-23 16:45:54,119 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 185 transitions. Word has length 20 [2021-11-23 16:45:54,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:45:54,120 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 185 transitions. [2021-11-23 16:45:54,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 9 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 16:45:54,120 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 185 transitions. [2021-11-23 16:45:54,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-23 16:45:54,121 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:45:54,121 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 16:45:54,136 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2021-11-23 16:45:54,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:45:54,333 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 16:45:54,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:45:54,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1590690829, now seen corresponding path program 1 times [2021-11-23 16:45:54,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:45:54,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [345686707] [2021-11-23 16:45:54,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:54,334 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:45:54,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:45:54,335 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:45:54,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2021-11-23 16:45:54,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:54,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 16:45:54,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:54,613 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:45:54,613 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:45:54,613 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:45:54,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [345686707] [2021-11-23 16:45:54,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [345686707] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:45:54,614 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:45:54,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 16:45:54,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083453144] [2021-11-23 16:45:54,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:45:54,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 16:45:54,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:45:54,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 16:45:54,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-23 16:45:54,615 INFO L87 Difference]: Start difference. First operand 155 states and 185 transitions. Second operand has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 7 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 16:45:54,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:45:54,677 INFO L93 Difference]: Finished difference Result 157 states and 187 transitions. [2021-11-23 16:45:54,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 16:45:54,678 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 7 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 16:45:54,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:45:54,679 INFO L225 Difference]: With dead ends: 157 [2021-11-23 16:45:54,679 INFO L226 Difference]: Without dead ends: 157 [2021-11-23 16:45:54,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-23 16:45:54,681 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 25 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:45:54,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 107 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 41 Unchecked, 0.0s Time] [2021-11-23 16:45:54,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-11-23 16:45:54,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 121. [2021-11-23 16:45:54,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 114 states have (on average 1.2719298245614035) internal successors, (145), 120 states have internal predecessors, (145), 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 16:45:54,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 145 transitions. [2021-11-23 16:45:54,686 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 145 transitions. Word has length 20 [2021-11-23 16:45:54,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:45:54,686 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 145 transitions. [2021-11-23 16:45:54,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 7 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 16:45:54,686 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 145 transitions. [2021-11-23 16:45:54,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-23 16:45:54,687 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:45:54,687 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] [2021-11-23 16:45:54,702 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (44)] Ended with exit code 0 [2021-11-23 16:45:54,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:45:54,899 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 16:45:54,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:45:54,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1210516230, now seen corresponding path program 1 times [2021-11-23 16:45:54,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:45:54,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1174004197] [2021-11-23 16:45:54,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:54,900 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:45:54,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:45:54,901 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:45:54,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2021-11-23 16:45:54,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:54,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:45:54,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:55,009 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-11-23 16:45:55,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 18 [2021-11-23 16:45:55,065 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:45:55,065 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:45:55,065 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:45:55,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1174004197] [2021-11-23 16:45:55,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1174004197] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:45:55,065 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:45:55,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:45:55,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946827930] [2021-11-23 16:45:55,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:45:55,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 16:45:55,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:45:55,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 16:45:55,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:45:55,067 INFO L87 Difference]: Start difference. First operand 121 states and 145 transitions. Second operand has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:55,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:45:55,170 INFO L93 Difference]: Finished difference Result 120 states and 144 transitions. [2021-11-23 16:45:55,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 16:45:55,171 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-23 16:45:55,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:45:55,172 INFO L225 Difference]: With dead ends: 120 [2021-11-23 16:45:55,172 INFO L226 Difference]: Without dead ends: 120 [2021-11-23 16:45:55,173 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 16:45:55,173 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 28 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:45:55,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 68 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 16:45:55,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-11-23 16:45:55,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2021-11-23 16:45:55,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 114 states have (on average 1.263157894736842) internal successors, (144), 119 states have internal predecessors, (144), 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 16:45:55,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 144 transitions. [2021-11-23 16:45:55,178 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 144 transitions. Word has length 21 [2021-11-23 16:45:55,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:45:55,178 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 144 transitions. [2021-11-23 16:45:55,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:55,179 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 144 transitions. [2021-11-23 16:45:55,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-23 16:45:55,179 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:45:55,179 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] [2021-11-23 16:45:55,191 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2021-11-23 16:45:55,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:45:55,391 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 16:45:55,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:45:55,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1210516231, now seen corresponding path program 1 times [2021-11-23 16:45:55,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:45:55,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [446748870] [2021-11-23 16:45:55,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:55,393 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:45:55,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:45:55,394 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:45:55,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2021-11-23 16:45:55,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:55,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 16:45:55,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:55,543 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 16:45:55,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 16:45:55,662 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:45:55,663 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:45:55,663 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:45:55,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [446748870] [2021-11-23 16:45:55,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [446748870] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:45:55,663 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:45:55,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 16:45:55,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135393743] [2021-11-23 16:45:55,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:45:55,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 16:45:55,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:45:55,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 16:45:55,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 16:45:55,665 INFO L87 Difference]: Start difference. First operand 120 states and 144 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:55,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:45:55,920 INFO L93 Difference]: Finished difference Result 150 states and 177 transitions. [2021-11-23 16:45:55,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 16:45:55,921 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-23 16:45:55,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:45:55,922 INFO L225 Difference]: With dead ends: 150 [2021-11-23 16:45:55,922 INFO L226 Difference]: Without dead ends: 150 [2021-11-23 16:45:55,923 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-11-23 16:45:55,923 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 54 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 16:45:55,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 123 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 16:45:55,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-11-23 16:45:55,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 133. [2021-11-23 16:45:55,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 127 states have (on average 1.2440944881889764) internal successors, (158), 132 states have internal predecessors, (158), 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 16:45:55,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 158 transitions. [2021-11-23 16:45:55,928 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 158 transitions. Word has length 21 [2021-11-23 16:45:55,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:45:55,928 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 158 transitions. [2021-11-23 16:45:55,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:55,928 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 158 transitions. [2021-11-23 16:45:55,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-23 16:45:55,929 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:45:55,929 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:45:55,948 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2021-11-23 16:45:56,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:45:56,138 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 16:45:56,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:45:56,139 INFO L85 PathProgramCache]: Analyzing trace with hash -377785809, now seen corresponding path program 2 times [2021-11-23 16:45:56,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:45:56,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2072641905] [2021-11-23 16:45:56,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 16:45:56,139 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:45:56,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:45:56,141 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:45:56,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2021-11-23 16:45:56,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 16:45:56,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:45:56,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-23 16:45:56,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:56,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-23 16:45:56,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:45:56,530 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 16:45:56,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 12 [2021-11-23 16:45:56,554 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 16:45:56,554 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:45:56,554 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:45:56,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2072641905] [2021-11-23 16:45:56,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2072641905] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:45:56,554 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:45:56,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-23 16:45:56,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560123893] [2021-11-23 16:45:56,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:45:56,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 16:45:56,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:45:56,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 16:45:56,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-23 16:45:56,556 INFO L87 Difference]: Start difference. First operand 133 states and 158 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:56,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:45:56,722 INFO L93 Difference]: Finished difference Result 178 states and 206 transitions. [2021-11-23 16:45:56,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 16:45:56,723 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-23 16:45:56,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:45:56,724 INFO L225 Difference]: With dead ends: 178 [2021-11-23 16:45:56,724 INFO L226 Difference]: Without dead ends: 178 [2021-11-23 16:45:56,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-11-23 16:45:56,725 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 38 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:45:56,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 173 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 30 Unchecked, 0.1s Time] [2021-11-23 16:45:56,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-11-23 16:45:56,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 134. [2021-11-23 16:45:56,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 128 states have (on average 1.25) internal successors, (160), 133 states have internal predecessors, (160), 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 16:45:56,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 160 transitions. [2021-11-23 16:45:56,730 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 160 transitions. Word has length 21 [2021-11-23 16:45:56,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:45:56,731 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 160 transitions. [2021-11-23 16:45:56,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:56,731 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 160 transitions. [2021-11-23 16:45:56,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-23 16:45:56,732 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:45:56,732 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] [2021-11-23 16:45:56,742 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2021-11-23 16:45:56,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:45:56,940 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 16:45:56,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:45:56,941 INFO L85 PathProgramCache]: Analyzing trace with hash -783628475, now seen corresponding path program 1 times [2021-11-23 16:45:56,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:45:56,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [765134422] [2021-11-23 16:45:56,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:56,942 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:45:56,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:45:56,943 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:45:56,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2021-11-23 16:45:57,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:57,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-23 16:45:57,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:57,089 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 16:45:57,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 16:45:57,255 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:57,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:45:57,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:57,810 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:45:57,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [765134422] [2021-11-23 16:45:57,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [765134422] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 16:45:57,810 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 16:45:57,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 11 [2021-11-23 16:45:57,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045189594] [2021-11-23 16:45:57,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:45:57,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 16:45:57,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:45:57,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 16:45:57,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-23 16:45:57,811 INFO L87 Difference]: Start difference. First operand 134 states and 160 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:58,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:45:58,372 INFO L93 Difference]: Finished difference Result 139 states and 165 transitions. [2021-11-23 16:45:58,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 16:45:58,373 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-23 16:45:58,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:45:58,373 INFO L225 Difference]: With dead ends: 139 [2021-11-23 16:45:58,373 INFO L226 Difference]: Without dead ends: 139 [2021-11-23 16:45:58,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-11-23 16:45:58,374 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 75 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 16:45:58,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 88 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 16:45:58,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-11-23 16:45:58,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 122. [2021-11-23 16:45:58,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 116 states have (on average 1.2672413793103448) internal successors, (147), 121 states have internal predecessors, (147), 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 16:45:58,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 147 transitions. [2021-11-23 16:45:58,378 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 147 transitions. Word has length 21 [2021-11-23 16:45:58,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:45:58,379 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 147 transitions. [2021-11-23 16:45:58,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:58,379 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 147 transitions. [2021-11-23 16:45:58,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-23 16:45:58,380 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:45:58,380 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:45:58,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2021-11-23 16:45:58,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:45:58,592 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 16:45:58,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:45:58,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1923036781, now seen corresponding path program 1 times [2021-11-23 16:45:58,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:45:58,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [289719277] [2021-11-23 16:45:58,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:58,593 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:45:58,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:45:58,593 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:45:58,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2021-11-23 16:45:58,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:58,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-23 16:45:58,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:58,751 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 16:45:58,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 16:45:58,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-23 16:45:59,111 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 16:45:59,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-11-23 16:45:59,607 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:45:59,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:46:00,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-11-23 16:46:00,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 27 [2021-11-23 16:46:01,279 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:46:01,279 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:46:01,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [289719277] [2021-11-23 16:46:01,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [289719277] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:46:01,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1108228566] [2021-11-23 16:46:01,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:46:01,279 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:46:01,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:46:01,280 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:46:01,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (50)] Waiting until timeout for monitored process [2021-11-23 16:46:01,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:46:01,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-23 16:46:01,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:46:02,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-23 16:46:02,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:46:02,570 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 16:46:02,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 12 [2021-11-23 16:46:02,635 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:46:02,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:46:02,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-11-23 16:46:02,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2021-11-23 16:46:03,702 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:46:03,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1108228566] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:46:03,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027683777] [2021-11-23 16:46:03,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:46:03,703 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:46:03,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:46:03,703 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:46:03,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-11-23 16:46:03,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:46:03,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-23 16:46:03,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:46:03,853 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 16:46:03,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 16:46:04,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-23 16:46:04,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-11-23 16:46:05,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:46:05,073 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 16:46:05,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 12 [2021-11-23 16:46:05,083 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:46:05,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:46:05,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-11-23 16:46:05,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2021-11-23 16:46:07,796 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:46:07,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027683777] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:46:07,797 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:46:07,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 12, 13, 12, 13] total 45 [2021-11-23 16:46:07,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475748089] [2021-11-23 16:46:07,798 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:46:07,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-23 16:46:07,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:46:07,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-23 16:46:07,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=1746, Unknown=0, NotChecked=0, Total=1980 [2021-11-23 16:46:07,800 INFO L87 Difference]: Start difference. First operand 122 states and 147 transitions. Second operand has 45 states, 45 states have (on average 1.9777777777777779) internal successors, (89), 45 states have internal predecessors, (89), 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 16:46:12,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:46:12,408 INFO L93 Difference]: Finished difference Result 194 states and 225 transitions. [2021-11-23 16:46:12,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-23 16:46:12,410 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.9777777777777779) internal successors, (89), 45 states have internal predecessors, (89), 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 21 [2021-11-23 16:46:12,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:46:12,411 INFO L225 Difference]: With dead ends: 194 [2021-11-23 16:46:12,411 INFO L226 Difference]: Without dead ends: 194 [2021-11-23 16:46:12,412 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 72 SyntacticMatches, 7 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1180 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=520, Invalid=3140, Unknown=0, NotChecked=0, Total=3660 [2021-11-23 16:46:12,413 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 83 mSDsluCounter, 500 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-23 16:46:12,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 528 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 348 Invalid, 0 Unknown, 113 Unchecked, 1.5s Time] [2021-11-23 16:46:12,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-11-23 16:46:12,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 137. [2021-11-23 16:46:12,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 131 states have (on average 1.2595419847328244) internal successors, (165), 136 states have internal predecessors, (165), 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 16:46:12,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 165 transitions. [2021-11-23 16:46:12,419 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 165 transitions. Word has length 21 [2021-11-23 16:46:12,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:46:12,419 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 165 transitions. [2021-11-23 16:46:12,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.9777777777777779) internal successors, (89), 45 states have internal predecessors, (89), 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 16:46:12,419 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 165 transitions. [2021-11-23 16:46:12,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-23 16:46:12,420 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:46:12,420 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:46:12,440 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2021-11-23 16:46:12,633 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (50)] Ended with exit code 0 [2021-11-23 16:46:12,854 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2021-11-23 16:46:13,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:46:13,032 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 16:46:13,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:46:13,033 INFO L85 PathProgramCache]: Analyzing trace with hash -2066729551, now seen corresponding path program 1 times [2021-11-23 16:46:13,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:46:13,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [500508435] [2021-11-23 16:46:13,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:46:13,033 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:46:13,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:46:13,034 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:46:13,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2021-11-23 16:46:13,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:46:13,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-23 16:46:13,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:46:13,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-23 16:46:13,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:46:13,489 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 16:46:13,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 12 [2021-11-23 16:46:13,517 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 16:46:13,518 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:46:13,518 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:46:13,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [500508435] [2021-11-23 16:46:13,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [500508435] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:46:13,519 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:46:13,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-23 16:46:13,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714571534] [2021-11-23 16:46:13,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:46:13,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-23 16:46:13,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:46:13,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-23 16:46:13,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-23 16:46:13,521 INFO L87 Difference]: Start difference. First operand 137 states and 165 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:46:13,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:46:13,691 INFO L93 Difference]: Finished difference Result 147 states and 175 transitions. [2021-11-23 16:46:13,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 16:46:13,692 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-23 16:46:13,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:46:13,693 INFO L225 Difference]: With dead ends: 147 [2021-11-23 16:46:13,693 INFO L226 Difference]: Without dead ends: 147 [2021-11-23 16:46:13,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-11-23 16:46:13,694 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 72 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:46:13,695 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 147 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 45 Unchecked, 0.1s Time] [2021-11-23 16:46:13,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-11-23 16:46:13,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 128. [2021-11-23 16:46:13,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 122 states have (on average 1.2704918032786885) internal successors, (155), 127 states have internal predecessors, (155), 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 16:46:13,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 155 transitions. [2021-11-23 16:46:13,699 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 155 transitions. Word has length 21 [2021-11-23 16:46:13,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:46:13,699 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 155 transitions. [2021-11-23 16:46:13,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:46:13,700 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 155 transitions. [2021-11-23 16:46:13,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-23 16:46:13,700 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:46:13,700 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:46:13,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (52)] Forceful destruction successful, exit code 0 [2021-11-23 16:46:13,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:46:13,912 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 16:46:13,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:46:13,912 INFO L85 PathProgramCache]: Analyzing trace with hash 234093039, now seen corresponding path program 1 times [2021-11-23 16:46:13,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:46:13,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1146835411] [2021-11-23 16:46:13,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:46:13,913 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:46:13,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:46:13,914 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:46:13,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2021-11-23 16:46:13,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:46:14,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-23 16:46:14,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:46:14,110 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 16:46:14,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 16:46:14,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-23 16:46:14,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:46:14,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2021-11-23 16:46:15,042 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:46:15,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:46:15,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-11-23 16:46:15,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 27 [2021-11-23 16:46:17,580 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:46:17,581 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:46:17,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1146835411] [2021-11-23 16:46:17,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1146835411] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:46:17,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [78609444] [2021-11-23 16:46:17,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:46:17,582 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:46:17,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:46:17,593 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:46:17,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (54)] Waiting until timeout for monitored process [2021-11-23 16:46:17,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:46:17,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-23 16:46:17,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:46:18,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-23 16:46:18,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:46:18,960 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 16:46:18,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 12 [2021-11-23 16:46:19,033 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:46:19,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:46:19,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-11-23 16:46:19,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2021-11-23 16:46:20,278 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:46:20,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [78609444] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:46:20,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632428143] [2021-11-23 16:46:20,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:46:20,278 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:46:20,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:46:20,279 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:46:20,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-11-23 16:46:20,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:46:20,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-23 16:46:20,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:46:20,443 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 16:46:20,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 16:46:20,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-23 16:46:20,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-11-23 16:46:21,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:46:21,064 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 16:46:21,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 12 [2021-11-23 16:46:21,074 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:46:21,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:46:21,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-11-23 16:46:21,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2021-11-23 16:46:23,969 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:46:23,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632428143] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:46:23,969 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:46:23,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 12, 13, 13, 14] total 51 [2021-11-23 16:46:23,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127687845] [2021-11-23 16:46:23,970 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:46:23,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-23 16:46:23,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:46:23,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-23 16:46:23,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=2185, Unknown=0, NotChecked=0, Total=2550 [2021-11-23 16:46:23,972 INFO L87 Difference]: Start difference. First operand 128 states and 155 transitions. Second operand has 51 states, 51 states have (on average 1.588235294117647) internal successors, (81), 51 states have internal predecessors, (81), 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 16:46:28,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:46:28,427 INFO L93 Difference]: Finished difference Result 218 states and 255 transitions. [2021-11-23 16:46:28,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-23 16:46:28,428 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.588235294117647) internal successors, (81), 51 states have internal predecessors, (81), 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 21 [2021-11-23 16:46:28,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:46:28,429 INFO L225 Difference]: With dead ends: 218 [2021-11-23 16:46:28,429 INFO L226 Difference]: Without dead ends: 218 [2021-11-23 16:46:28,431 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 71 SyntacticMatches, 7 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1708 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=732, Invalid=3558, Unknown=0, NotChecked=0, Total=4290 [2021-11-23 16:46:28,432 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 198 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 121 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:46:28,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 429 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 432 Invalid, 0 Unknown, 121 Unchecked, 2.0s Time] [2021-11-23 16:46:28,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-11-23 16:46:28,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 146. [2021-11-23 16:46:28,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 140 states have (on average 1.2642857142857142) internal successors, (177), 145 states have internal predecessors, (177), 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 16:46:28,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 177 transitions. [2021-11-23 16:46:28,438 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 177 transitions. Word has length 21 [2021-11-23 16:46:28,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:46:28,438 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 177 transitions. [2021-11-23 16:46:28,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.588235294117647) internal successors, (81), 51 states have internal predecessors, (81), 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 16:46:28,439 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 177 transitions. [2021-11-23 16:46:28,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-23 16:46:28,439 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:46:28,440 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:46:28,476 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-11-23 16:46:28,668 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (53)] Forceful destruction successful, exit code 0 [2021-11-23 16:46:28,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (54)] Forceful destruction successful, exit code 0 [2021-11-23 16:46:29,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 16:46:29,054 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 16:46:29,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:46:29,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1863163724, now seen corresponding path program 1 times [2021-11-23 16:46:29,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:46:29,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1025064911] [2021-11-23 16:46:29,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:46:29,055 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:46:29,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:46:29,056 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:46:29,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2021-11-23 16:46:29,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:46:29,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 16:46:29,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:46:29,852 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:46:29,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:46:30,847 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:46:30,847 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:46:30,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1025064911] [2021-11-23 16:46:30,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1025064911] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:46:30,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1339434440] [2021-11-23 16:46:30,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:46:30,847 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:46:30,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:46:30,848 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:46:30,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (57)] Waiting until timeout for monitored process [2021-11-23 16:46:30,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:46:30,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 16:46:30,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:46:31,845 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:46:31,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:46:32,232 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:46:32,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1339434440] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:46:32,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690511694] [2021-11-23 16:46:32,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:46:32,233 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:46:32,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:46:32,234 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:46:32,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-11-23 16:46:32,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:46:32,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 16:46:32,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:46:32,719 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:46:32,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:46:32,993 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:46:32,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690511694] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:46:32,993 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:46:32,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12, 12, 13, 12] total 33 [2021-11-23 16:46:32,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918796848] [2021-11-23 16:46:32,994 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:46:32,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-23 16:46:32,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:46:32,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-23 16:46:32,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=815, Unknown=0, NotChecked=0, Total=1056 [2021-11-23 16:46:32,996 INFO L87 Difference]: Start difference. First operand 146 states and 177 transitions. Second operand has 33 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 33 states have internal predecessors, (61), 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 16:46:35,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:46:35,422 INFO L93 Difference]: Finished difference Result 266 states and 300 transitions. [2021-11-23 16:46:35,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-23 16:46:35,429 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 33 states have internal predecessors, (61), 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 22 [2021-11-23 16:46:35,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:46:35,430 INFO L225 Difference]: With dead ends: 266 [2021-11-23 16:46:35,430 INFO L226 Difference]: Without dead ends: 266 [2021-11-23 16:46:35,431 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 93 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 811 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=513, Invalid=1743, Unknown=0, NotChecked=0, Total=2256 [2021-11-23 16:46:35,432 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 295 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 721 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 116 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-23 16:46:35,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [295 Valid, 721 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 301 Invalid, 0 Unknown, 116 Unchecked, 0.8s Time] [2021-11-23 16:46:35,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-11-23 16:46:35,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 160. [2021-11-23 16:46:35,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 154 states have (on average 1.2402597402597402) internal successors, (191), 159 states have internal predecessors, (191), 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 16:46:35,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 191 transitions. [2021-11-23 16:46:35,438 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 191 transitions. Word has length 22 [2021-11-23 16:46:35,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:46:35,438 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 191 transitions. [2021-11-23 16:46:35,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 33 states have internal predecessors, (61), 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 16:46:35,439 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 191 transitions. [2021-11-23 16:46:35,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-23 16:46:35,439 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:46:35,440 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:46:35,448 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (57)] Forceful destruction successful, exit code 0 [2021-11-23 16:46:35,649 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (56)] Ended with exit code 0 [2021-11-23 16:46:35,863 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2021-11-23 16:46:36,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:46:36,042 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 16:46:36,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:46:36,043 INFO L85 PathProgramCache]: Analyzing trace with hash 437658866, now seen corresponding path program 1 times [2021-11-23 16:46:36,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:46:36,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1439625976] [2021-11-23 16:46:36,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:46:36,043 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:46:36,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:46:36,044 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:46:36,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (59)] Waiting until timeout for monitored process [2021-11-23 16:46:36,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:46:36,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 16:46:36,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:46:37,194 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:46:37,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:46:38,238 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:46:38,238 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:46:38,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1439625976] [2021-11-23 16:46:38,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1439625976] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:46:38,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1444893204] [2021-11-23 16:46:38,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:46:38,239 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:46:38,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:46:38,239 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:46:38,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (60)] Waiting until timeout for monitored process [2021-11-23 16:46:38,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:46:38,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 16:46:38,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:46:39,050 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:46:39,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:46:39,340 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:46:39,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1444893204] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:46:39,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636706597] [2021-11-23 16:46:39,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:46:39,341 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:46:39,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:46:39,341 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:46:39,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-11-23 16:46:39,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:46:39,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-23 16:46:39,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:46:39,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:46:39,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-23 16:46:39,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-11-23 16:46:40,193 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:46:40,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:46:43,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:46:43,044 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:46:43,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636706597] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:46:43,044 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:46:43,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 13, 12, 8, 8] total 36 [2021-11-23 16:46:43,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458235959] [2021-11-23 16:46:43,044 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:46:43,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-23 16:46:43,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:46:43,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-23 16:46:43,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=1039, Unknown=0, NotChecked=0, Total=1260 [2021-11-23 16:46:43,046 INFO L87 Difference]: Start difference. First operand 160 states and 191 transitions. Second operand has 36 states, 36 states have (on average 2.1666666666666665) internal successors, (78), 36 states have internal predecessors, (78), 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 16:46:49,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:46:49,232 INFO L93 Difference]: Finished difference Result 274 states and 316 transitions. [2021-11-23 16:46:49,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-23 16:46:49,233 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.1666666666666665) internal successors, (78), 36 states have internal predecessors, (78), 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 22 [2021-11-23 16:46:49,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:46:49,235 INFO L225 Difference]: With dead ends: 274 [2021-11-23 16:46:49,235 INFO L226 Difference]: Without dead ends: 274 [2021-11-23 16:46:49,236 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 101 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1103 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=804, Invalid=2978, Unknown=0, NotChecked=0, Total=3782 [2021-11-23 16:46:49,237 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 263 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-23 16:46:49,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 376 Invalid, 529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 399 Invalid, 0 Unknown, 102 Unchecked, 1.8s Time] [2021-11-23 16:46:49,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-11-23 16:46:49,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 171. [2021-11-23 16:46:49,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 165 states have (on average 1.2303030303030302) internal successors, (203), 170 states have internal predecessors, (203), 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 16:46:49,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 203 transitions. [2021-11-23 16:46:49,242 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 203 transitions. Word has length 22 [2021-11-23 16:46:49,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:46:49,243 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 203 transitions. [2021-11-23 16:46:49,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.1666666666666665) internal successors, (78), 36 states have internal predecessors, (78), 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 16:46:49,243 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 203 transitions. [2021-11-23 16:46:49,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-23 16:46:49,244 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:46:49,244 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:46:49,281 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2021-11-23 16:46:49,469 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (60)] Forceful destruction successful, exit code 0 [2021-11-23 16:46:49,675 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (59)] Ended with exit code 0 [2021-11-23 16:46:49,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:46:49,869 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 16:46:49,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:46:49,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1943656895, now seen corresponding path program 1 times [2021-11-23 16:46:49,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:46:49,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [287037718] [2021-11-23 16:46:49,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:46:49,870 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:46:49,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:46:49,871 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:46:49,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (62)] Waiting until timeout for monitored process [2021-11-23 16:46:49,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:46:49,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-23 16:46:49,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:46:50,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-11-23 16:46:50,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-11-23 16:46:50,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 16:46:50,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-23 16:46:50,386 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:46:50,386 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:46:50,386 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:46:50,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [287037718] [2021-11-23 16:46:50,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [287037718] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:46:50,387 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:46:50,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-23 16:46:50,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655893372] [2021-11-23 16:46:50,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:46:50,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-23 16:46:50,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:46:50,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-23 16:46:50,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-23 16:46:50,388 INFO L87 Difference]: Start difference. First operand 171 states and 203 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 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 16:46:50,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:46:50,758 INFO L93 Difference]: Finished difference Result 236 states and 272 transitions. [2021-11-23 16:46:50,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 16:46:50,764 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 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 24 [2021-11-23 16:46:50,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:46:50,765 INFO L225 Difference]: With dead ends: 236 [2021-11-23 16:46:50,765 INFO L226 Difference]: Without dead ends: 236 [2021-11-23 16:46:50,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-11-23 16:46:50,766 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 85 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:46:50,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 216 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 66 Invalid, 0 Unknown, 43 Unchecked, 0.1s Time] [2021-11-23 16:46:50,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-11-23 16:46:50,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 195. [2021-11-23 16:46:50,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 189 states have (on average 1.2116402116402116) internal successors, (229), 194 states have internal predecessors, (229), 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 16:46:50,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 229 transitions. [2021-11-23 16:46:50,771 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 229 transitions. Word has length 24 [2021-11-23 16:46:50,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:46:50,772 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 229 transitions. [2021-11-23 16:46:50,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 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 16:46:50,772 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 229 transitions. [2021-11-23 16:46:50,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-23 16:46:50,773 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:46:50,773 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:46:50,785 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (62)] Ended with exit code 0 [2021-11-23 16:46:50,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:46:50,985 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 16:46:50,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:46:50,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1126008445, now seen corresponding path program 1 times [2021-11-23 16:46:50,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:46:50,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [827563413] [2021-11-23 16:46:50,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:46:50,987 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:46:50,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:46:50,988 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:46:51,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (63)] Waiting until timeout for monitored process [2021-11-23 16:46:51,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:46:51,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-23 16:46:51,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:46:51,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-11-23 16:46:51,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-11-23 16:46:51,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 17 [2021-11-23 16:46:51,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-11-23 16:46:51,349 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:46:51,349 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:46:51,349 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:46:51,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [827563413] [2021-11-23 16:46:51,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [827563413] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:46:51,350 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:46:51,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-23 16:46:51,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88100143] [2021-11-23 16:46:51,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:46:51,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 16:46:51,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:46:51,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 16:46:51,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-23 16:46:51,351 INFO L87 Difference]: Start difference. First operand 195 states and 229 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 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 16:46:51,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:46:51,596 INFO L93 Difference]: Finished difference Result 227 states and 263 transitions. [2021-11-23 16:46:51,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 16:46:51,596 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 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 24 [2021-11-23 16:46:51,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:46:51,598 INFO L225 Difference]: With dead ends: 227 [2021-11-23 16:46:51,598 INFO L226 Difference]: Without dead ends: 227 [2021-11-23 16:46:51,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-11-23 16:46:51,599 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 42 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 16:46:51,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 194 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 16:46:51,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-11-23 16:46:51,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 205. [2021-11-23 16:46:51,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 199 states have (on average 1.221105527638191) internal successors, (243), 204 states have internal predecessors, (243), 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 16:46:51,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 243 transitions. [2021-11-23 16:46:51,605 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 243 transitions. Word has length 24 [2021-11-23 16:46:51,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:46:51,605 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 243 transitions. [2021-11-23 16:46:51,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 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 16:46:51,605 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 243 transitions. [2021-11-23 16:46:51,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-23 16:46:51,606 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:46:51,606 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:46:51,618 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (63)] Forceful destruction successful, exit code 0 [2021-11-23 16:46:51,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:46:51,818 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 16:46:51,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:46:51,818 INFO L85 PathProgramCache]: Analyzing trace with hash -2132455683, now seen corresponding path program 1 times [2021-11-23 16:46:51,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:46:51,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [394064050] [2021-11-23 16:46:51,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:46:51,819 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:46:51,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:46:51,820 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:46:51,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (64)] Waiting until timeout for monitored process [2021-11-23 16:46:51,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:46:51,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-23 16:46:51,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:46:52,003 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 16:46:52,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 16:46:52,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-11-23 16:46:52,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-23 16:46:52,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2021-11-23 16:46:52,587 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 16:46:52,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 25 [2021-11-23 16:46:52,969 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:46:52,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:46:53,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 87 [2021-11-23 16:46:54,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:46:54,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2021-11-23 16:46:54,752 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:46:54,752 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:46:54,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [394064050] [2021-11-23 16:46:54,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [394064050] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:46:54,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [395794370] [2021-11-23 16:46:54,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:46:54,753 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:46:54,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:46:54,755 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:46:54,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (65)] Waiting until timeout for monitored process [2021-11-23 16:46:55,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:46:55,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-23 16:46:55,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:46:55,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2021-11-23 16:46:55,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-23 16:46:55,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2021-11-23 16:46:56,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:46:56,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-11-23 16:46:56,232 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:46:56,232 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:46:56,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [395794370] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:46:56,232 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 16:46:56,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [12, 10] total 32 [2021-11-23 16:46:56,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843110419] [2021-11-23 16:46:56,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:46:56,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-23 16:46:56,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:46:56,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-23 16:46:56,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2021-11-23 16:46:56,234 INFO L87 Difference]: Start difference. First operand 205 states and 243 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 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 16:46:56,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:46:56,481 INFO L93 Difference]: Finished difference Result 243 states and 281 transitions. [2021-11-23 16:46:56,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-23 16:46:56,482 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 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 24 [2021-11-23 16:46:56,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:46:56,483 INFO L225 Difference]: With dead ends: 243 [2021-11-23 16:46:56,483 INFO L226 Difference]: Without dead ends: 243 [2021-11-23 16:46:56,484 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=135, Invalid=987, Unknown=0, NotChecked=0, Total=1122 [2021-11-23 16:46:56,484 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 69 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:46:56,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 155 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 77 Unchecked, 0.1s Time] [2021-11-23 16:46:56,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-11-23 16:46:56,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 205. [2021-11-23 16:46:56,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 199 states have (on average 1.221105527638191) internal successors, (243), 204 states have internal predecessors, (243), 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 16:46:56,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 243 transitions. [2021-11-23 16:46:56,489 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 243 transitions. Word has length 24 [2021-11-23 16:46:56,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:46:56,489 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 243 transitions. [2021-11-23 16:46:56,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 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 16:46:56,490 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 243 transitions. [2021-11-23 16:46:56,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-23 16:46:56,490 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:46:56,490 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:46:56,515 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (64)] Forceful destruction successful, exit code 0 [2021-11-23 16:46:56,707 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (65)] Forceful destruction successful, exit code 0 [2021-11-23 16:46:56,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 16:46:56,904 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 16:46:56,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:46:56,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1344863163, now seen corresponding path program 1 times [2021-11-23 16:46:56,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:46:56,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [406273142] [2021-11-23 16:46:56,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:46:56,905 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:46:56,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:46:56,906 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:46:56,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (66)] Waiting until timeout for monitored process [2021-11-23 16:46:57,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:46:57,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-23 16:46:57,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:46:57,068 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 16:46:57,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 16:46:57,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2021-11-23 16:46:57,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-23 16:46:57,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-11-23 16:46:57,436 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 16:46:57,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-11-23 16:46:57,790 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:46:57,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:46:58,649 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 16:46:58,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2021-11-23 16:46:58,673 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 16:46:58,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 38 [2021-11-23 16:46:58,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-11-23 16:46:59,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:46:59,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-11-23 16:46:59,239 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:46:59,240 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:46:59,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [406273142] [2021-11-23 16:46:59,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [406273142] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:46:59,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [591440990] [2021-11-23 16:46:59,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:46:59,241 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:46:59,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:46:59,242 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:46:59,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (67)] Waiting until timeout for monitored process [2021-11-23 16:46:59,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:46:59,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-23 16:46:59,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:46:59,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-11-23 16:46:59,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-23 16:46:59,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-11-23 16:47:00,466 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 16:47:00,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-11-23 16:47:01,552 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:47:01,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:47:02,510 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 16:47:02,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 38 [2021-11-23 16:47:02,594 INFO L354 Elim1Store]: treesize reduction 6, result has 83.8 percent of original size [2021-11-23 16:47:02,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 81 [2021-11-23 16:47:02,622 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 16:47:02,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 40 [2021-11-23 16:47:02,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-11-23 16:47:03,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:47:03,422 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:47:03,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [591440990] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:47:03,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960497338] [2021-11-23 16:47:03,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:47:03,423 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:47:03,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:47:03,424 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:47:03,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-11-23 16:47:03,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:47:03,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-23 16:47:03,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:47:03,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-11-23 16:47:03,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-23 16:47:03,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-11-23 16:47:03,779 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 16:47:03,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-11-23 16:47:04,198 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:47:04,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:47:04,564 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 16:47:04,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2021-11-23 16:47:04,590 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 16:47:04,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 38 [2021-11-23 16:47:04,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-11-23 16:47:04,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-11-23 16:47:05,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:47:05,105 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:47:05,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960497338] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:47:05,106 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:47:05,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 11, 11, 10, 9] total 33 [2021-11-23 16:47:05,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643482164] [2021-11-23 16:47:05,106 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:47:05,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-23 16:47:05,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:47:05,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-23 16:47:05,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=976, Unknown=6, NotChecked=0, Total=1122 [2021-11-23 16:47:05,109 INFO L87 Difference]: Start difference. First operand 205 states and 243 transitions. Second operand has 34 states, 33 states have (on average 2.5454545454545454) internal successors, (84), 34 states have internal predecessors, (84), 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 16:47:05,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:47:05,566 INFO L93 Difference]: Finished difference Result 219 states and 259 transitions. [2021-11-23 16:47:05,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-23 16:47:05,567 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.5454545454545454) internal successors, (84), 34 states have internal predecessors, (84), 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 24 [2021-11-23 16:47:05,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:47:05,568 INFO L225 Difference]: With dead ends: 219 [2021-11-23 16:47:05,568 INFO L226 Difference]: Without dead ends: 219 [2021-11-23 16:47:05,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 104 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=208, Invalid=1118, Unknown=6, NotChecked=0, Total=1332 [2021-11-23 16:47:05,569 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 47 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 16:47:05,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 328 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 53 Invalid, 0 Unknown, 94 Unchecked, 0.2s Time] [2021-11-23 16:47:05,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-11-23 16:47:05,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 193. [2021-11-23 16:47:05,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 188 states have (on average 1.2180851063829787) internal successors, (229), 192 states have internal predecessors, (229), 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 16:47:05,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 229 transitions. [2021-11-23 16:47:05,574 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 229 transitions. Word has length 24 [2021-11-23 16:47:05,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:47:05,575 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 229 transitions. [2021-11-23 16:47:05,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.5454545454545454) internal successors, (84), 34 states have internal predecessors, (84), 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 16:47:05,575 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 229 transitions. [2021-11-23 16:47:05,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-23 16:47:05,576 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:47:05,576 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:47:05,600 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (66)] Ended with exit code 0 [2021-11-23 16:47:05,789 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (67)] Ended with exit code 0 [2021-11-23 16:47:06,012 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2021-11-23 16:47:06,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:47:06,188 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 16:47:06,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:47:06,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1261568960, now seen corresponding path program 2 times [2021-11-23 16:47:06,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:47:06,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1275049867] [2021-11-23 16:47:06,189 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 16:47:06,189 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:47:06,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:47:06,190 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:47:06,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (69)] Waiting until timeout for monitored process [2021-11-23 16:47:06,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 16:47:06,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:47:06,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-23 16:47:06,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:47:06,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:47:06,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-23 16:47:06,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-11-23 16:47:06,720 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:47:06,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:47:08,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:47:08,696 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:47:08,696 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:47:08,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1275049867] [2021-11-23 16:47:08,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1275049867] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:47:08,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [646775617] [2021-11-23 16:47:08,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 16:47:08,696 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:47:08,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:47:08,698 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:47:08,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (70)] Waiting until timeout for monitored process [2021-11-23 16:47:08,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 16:47:08,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:47:08,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-23 16:47:08,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:47:08,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:47:08,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-23 16:47:08,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-11-23 16:47:09,401 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:47:09,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:47:12,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:47:12,519 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:47:12,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [646775617] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:47:12,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406634513] [2021-11-23 16:47:12,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 16:47:12,519 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:47:12,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:47:12,520 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:47:12,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-11-23 16:47:12,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 16:47:12,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:47:12,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 16:47:12,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:47:12,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:47:12,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-23 16:47:12,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-11-23 16:47:13,119 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:47:13,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:47:13,876 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:47:13,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406634513] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:47:13,876 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:47:13,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9, 9, 7, 8] total 35 [2021-11-23 16:47:13,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030073593] [2021-11-23 16:47:13,876 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:47:13,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-23 16:47:13,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:47:13,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-23 16:47:13,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=968, Unknown=0, NotChecked=0, Total=1260 [2021-11-23 16:47:13,878 INFO L87 Difference]: Start difference. First operand 193 states and 229 transitions. Second operand has 36 states, 35 states have (on average 2.942857142857143) internal successors, (103), 36 states have internal predecessors, (103), 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 16:47:21,474 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 16:47:29,381 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 16:47:35,045 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 16:47:42,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:47:42,435 INFO L93 Difference]: Finished difference Result 749 states and 851 transitions. [2021-11-23 16:47:42,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-23 16:47:42,438 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.942857142857143) internal successors, (103), 36 states have internal predecessors, (103), 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 24 [2021-11-23 16:47:42,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:47:42,441 INFO L225 Difference]: With dead ends: 749 [2021-11-23 16:47:42,441 INFO L226 Difference]: Without dead ends: 749 [2021-11-23 16:47:42,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 973 ImplicationChecksByTransitivity, 22.2s TimeCoverageRelationStatistics Valid=749, Invalid=2331, Unknown=0, NotChecked=0, Total=3080 [2021-11-23 16:47:42,443 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 1881 mSDsluCounter, 878 mSDsCounter, 0 mSdLazyCounter, 956 mSolverCounterSat, 55 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1881 SdHoareTripleChecker+Valid, 957 SdHoareTripleChecker+Invalid, 1014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 956 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.4s IncrementalHoareTripleChecker+Time [2021-11-23 16:47:42,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1881 Valid, 957 Invalid, 1014 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 956 Invalid, 3 Unknown, 0 Unchecked, 10.4s Time] [2021-11-23 16:47:42,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2021-11-23 16:47:42,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 238. [2021-11-23 16:47:42,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 233 states have (on average 1.2231759656652361) internal successors, (285), 237 states have internal predecessors, (285), 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 16:47:42,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 285 transitions. [2021-11-23 16:47:42,453 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 285 transitions. Word has length 24 [2021-11-23 16:47:42,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:47:42,454 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 285 transitions. [2021-11-23 16:47:42,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.942857142857143) internal successors, (103), 36 states have internal predecessors, (103), 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 16:47:42,454 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 285 transitions. [2021-11-23 16:47:42,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-23 16:47:42,455 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:47:42,455 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] [2021-11-23 16:47:42,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2021-11-23 16:47:42,688 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (69)] Ended with exit code 0 [2021-11-23 16:47:42,882 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (70)] Ended with exit code 0 [2021-11-23 16:47:43,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 16:47:43,081 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 16:47:43,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:47:43,081 INFO L85 PathProgramCache]: Analyzing trace with hash 123776973, now seen corresponding path program 1 times [2021-11-23 16:47:43,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:47:43,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1626922367] [2021-11-23 16:47:43,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:47:43,082 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:47:43,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:47:43,082 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:47:43,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (72)] Waiting until timeout for monitored process [2021-11-23 16:47:43,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:47:43,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 16:47:43,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:47:43,703 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:47:43,703 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:47:43,703 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:47:43,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1626922367] [2021-11-23 16:47:43,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1626922367] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:47:43,703 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:47:43,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:47:43,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305410802] [2021-11-23 16:47:43,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:47:43,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 16:47:43,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:47:43,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 16:47:43,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:47:43,704 INFO L87 Difference]: Start difference. First operand 238 states and 285 transitions. Second operand has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:43,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:47:43,714 INFO L93 Difference]: Finished difference Result 279 states and 331 transitions. [2021-11-23 16:47:43,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 16:47:43,714 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-23 16:47:43,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:47:43,715 INFO L225 Difference]: With dead ends: 279 [2021-11-23 16:47:43,715 INFO L226 Difference]: Without dead ends: 250 [2021-11-23 16:47:43,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:47:43,716 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 9 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:47:43,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 101 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 15 Unchecked, 0.0s Time] [2021-11-23 16:47:43,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-11-23 16:47:43,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 247. [2021-11-23 16:47:43,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 242 states have (on average 1.2066115702479339) internal successors, (292), 246 states have internal predecessors, (292), 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 16:47:43,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 292 transitions. [2021-11-23 16:47:43,722 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 292 transitions. Word has length 25 [2021-11-23 16:47:43,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:47:43,723 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 292 transitions. [2021-11-23 16:47:43,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:43,723 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 292 transitions. [2021-11-23 16:47:43,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-23 16:47:43,724 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:47:43,724 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:47:43,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (72)] Forceful destruction successful, exit code 0 [2021-11-23 16:47:43,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:47:43,932 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 16:47:43,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:47:43,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1258914877, now seen corresponding path program 1 times [2021-11-23 16:47:43,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:47:43,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [570239451] [2021-11-23 16:47:43,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:47:43,933 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:47:43,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:47:43,934 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:47:43,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (73)] Waiting until timeout for monitored process [2021-11-23 16:47:44,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:47:44,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-23 16:47:44,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:47:44,069 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 16:47:44,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 16:47:44,201 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:47:44,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:47:44,604 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:47:44,604 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:47:44,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [570239451] [2021-11-23 16:47:44,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [570239451] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:47:44,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [151221258] [2021-11-23 16:47:44,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:47:44,605 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:47:44,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:47:44,606 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:47:44,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (74)] Waiting until timeout for monitored process [2021-11-23 16:47:44,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:47:44,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-23 16:47:44,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:47:44,856 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 16:47:44,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 16:47:44,976 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:47:44,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:47:45,238 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:47:45,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [151221258] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:47:45,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205221750] [2021-11-23 16:47:45,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:47:45,239 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:47:45,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:47:45,241 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:47:45,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-11-23 16:47:45,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:47:45,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-23 16:47:45,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:47:45,404 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 16:47:45,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 16:47:45,553 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:47:45,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:47:45,771 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:47:45,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205221750] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:47:45,772 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:47:45,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 11 [2021-11-23 16:47:45,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391899619] [2021-11-23 16:47:45,772 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:47:45,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-23 16:47:45,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:47:45,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-23 16:47:45,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-11-23 16:47:45,773 INFO L87 Difference]: Start difference. First operand 247 states and 292 transitions. Second operand has 12 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:47,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:47:47,276 INFO L93 Difference]: Finished difference Result 273 states and 317 transitions. [2021-11-23 16:47:47,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-23 16:47:47,282 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-23 16:47:47,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:47:47,283 INFO L225 Difference]: With dead ends: 273 [2021-11-23 16:47:47,284 INFO L226 Difference]: Without dead ends: 273 [2021-11-23 16:47:47,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=137, Invalid=415, Unknown=0, NotChecked=0, Total=552 [2021-11-23 16:47:47,285 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 144 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 16:47:47,285 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 183 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-23 16:47:47,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-11-23 16:47:47,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 243. [2021-11-23 16:47:47,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 238 states have (on average 1.2100840336134453) internal successors, (288), 242 states have internal predecessors, (288), 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 16:47:47,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 288 transitions. [2021-11-23 16:47:47,291 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 288 transitions. Word has length 25 [2021-11-23 16:47:47,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:47:47,291 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 288 transitions. [2021-11-23 16:47:47,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:47,292 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 288 transitions. [2021-11-23 16:47:47,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-23 16:47:47,293 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:47:47,293 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:47:47,302 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (73)] Ended with exit code 0 [2021-11-23 16:47:47,501 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (74)] Ended with exit code 0 [2021-11-23 16:47:47,721 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2021-11-23 16:47:47,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:47:47,900 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 16:47:47,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:47:47,901 INFO L85 PathProgramCache]: Analyzing trace with hash -67409757, now seen corresponding path program 2 times [2021-11-23 16:47:47,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:47:47,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1520328547] [2021-11-23 16:47:47,901 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 16:47:47,901 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:47:47,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:47:47,902 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:47:47,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (76)] Waiting until timeout for monitored process [2021-11-23 16:47:48,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 16:47:48,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:47:48,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-23 16:47:48,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:47:48,097 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 16:47:48,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 16:47:48,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-23 16:47:48,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:47:48,770 INFO L354 Elim1Store]: treesize reduction 8, result has 65.2 percent of original size [2021-11-23 16:47:48,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 29 [2021-11-23 16:47:49,562 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:47:49,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:47:50,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2021-11-23 16:47:50,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:47:50,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 57 [2021-11-23 16:47:52,041 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 16:47:52,042 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:47:52,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1520328547] [2021-11-23 16:47:52,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1520328547] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:47:52,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [682542196] [2021-11-23 16:47:52,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 16:47:52,042 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:47:52,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:47:52,043 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:47:52,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (77)] Waiting until timeout for monitored process [2021-11-23 16:47:52,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 16:47:52,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:47:52,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-23 16:47:52,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:47:53,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-23 16:47:54,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:47:54,391 INFO L354 Elim1Store]: treesize reduction 15, result has 34.8 percent of original size [2021-11-23 16:47:54,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 22 [2021-11-23 16:47:54,620 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:47:54,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:47:55,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2021-11-23 16:47:55,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:47:55,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 57 [2021-11-23 16:47:58,886 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:47:58,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [682542196] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:47:58,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256009537] [2021-11-23 16:47:58,887 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 16:47:58,887 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:47:58,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:47:58,888 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:47:58,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-11-23 16:47:59,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 16:47:59,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:47:59,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-23 16:47:59,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:47:59,064 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 16:47:59,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 16:48:00,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-23 16:48:00,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-11-23 16:48:01,530 INFO L354 Elim1Store]: treesize reduction 13, result has 38.1 percent of original size [2021-11-23 16:48:01,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 22 [2021-11-23 16:48:01,628 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:48:01,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:48:01,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2021-11-23 16:48:01,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:48:01,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 57 [2021-11-23 16:48:06,777 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:48:06,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256009537] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:48:06,777 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:48:06,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 16, 17, 16, 17] total 64 [2021-11-23 16:48:06,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292896532] [2021-11-23 16:48:06,778 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:48:06,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-11-23 16:48:06,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:48:06,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-11-23 16:48:06,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=400, Invalid=3632, Unknown=0, NotChecked=0, Total=4032 [2021-11-23 16:48:06,780 INFO L87 Difference]: Start difference. First operand 243 states and 288 transitions. Second operand has 64 states, 64 states have (on average 1.875) internal successors, (120), 64 states have internal predecessors, (120), 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 16:48:30,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:48:30,740 INFO L93 Difference]: Finished difference Result 363 states and 425 transitions. [2021-11-23 16:48:30,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-23 16:48:30,747 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.875) internal successors, (120), 64 states have internal predecessors, (120), 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 27 [2021-11-23 16:48:30,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:48:30,749 INFO L225 Difference]: With dead ends: 363 [2021-11-23 16:48:30,749 INFO L226 Difference]: Without dead ends: 356 [2021-11-23 16:48:30,752 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 89 SyntacticMatches, 6 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3195 ImplicationChecksByTransitivity, 33.2s TimeCoverageRelationStatistics Valid=1286, Invalid=8814, Unknown=0, NotChecked=0, Total=10100 [2021-11-23 16:48:30,752 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 440 mSDsluCounter, 577 mSDsCounter, 0 mSdLazyCounter, 939 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 440 SdHoareTripleChecker+Valid, 599 SdHoareTripleChecker+Invalid, 1274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 939 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 241 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:48:30,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [440 Valid, 599 Invalid, 1274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 939 Invalid, 0 Unknown, 241 Unchecked, 4.0s Time] [2021-11-23 16:48:30,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2021-11-23 16:48:30,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 275. [2021-11-23 16:48:30,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 270 states have (on average 1.211111111111111) internal successors, (327), 274 states have internal predecessors, (327), 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 16:48:30,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 327 transitions. [2021-11-23 16:48:30,760 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 327 transitions. Word has length 27 [2021-11-23 16:48:30,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:48:30,760 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 327 transitions. [2021-11-23 16:48:30,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.875) internal successors, (120), 64 states have internal predecessors, (120), 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 16:48:30,761 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 327 transitions. [2021-11-23 16:48:30,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-23 16:48:30,762 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:48:30,762 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:48:30,769 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (77)] Forceful destruction successful, exit code 0 [2021-11-23 16:48:30,971 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (76)] Ended with exit code 0 [2021-11-23 16:48:31,185 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2021-11-23 16:48:31,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:48:31,365 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 16:48:31,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:48:31,365 INFO L85 PathProgramCache]: Analyzing trace with hash -678635645, now seen corresponding path program 2 times [2021-11-23 16:48:31,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:48:31,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1186421456] [2021-11-23 16:48:31,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 16:48:31,366 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:48:31,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:48:31,367 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:48:31,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (79)] Waiting until timeout for monitored process [2021-11-23 16:48:31,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 16:48:31,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:48:31,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-23 16:48:31,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:48:31,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:48:31,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-23 16:48:31,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-11-23 16:48:31,895 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:48:31,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:48:33,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:48:33,039 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:48:33,040 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:48:33,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1186421456] [2021-11-23 16:48:33,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1186421456] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:48:33,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1135185707] [2021-11-23 16:48:33,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 16:48:33,040 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:48:33,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:48:33,041 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:48:33,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (80)] Waiting until timeout for monitored process [2021-11-23 16:48:33,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 16:48:33,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:48:33,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-23 16:48:33,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:48:33,294 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 16:48:33,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 16:48:33,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-11-23 16:48:34,094 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:48:34,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:48:35,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:48:35,171 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:48:35,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1135185707] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:48:35,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523026524] [2021-11-23 16:48:35,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 16:48:35,171 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:48:35,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:48:35,172 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:48:35,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-11-23 16:48:35,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 16:48:35,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:48:35,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-23 16:48:35,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:48:35,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:48:35,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-23 16:48:35,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-11-23 16:48:35,928 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:48:35,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:48:36,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:48:37,476 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:48:37,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523026524] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:48:37,477 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:48:37,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9, 9, 11, 11] total 30 [2021-11-23 16:48:37,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064638451] [2021-11-23 16:48:37,477 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:48:37,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-23 16:48:37,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:48:37,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-23 16:48:37,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=736, Unknown=0, NotChecked=0, Total=870 [2021-11-23 16:48:37,479 INFO L87 Difference]: Start difference. First operand 275 states and 327 transitions. Second operand has 30 states, 30 states have (on average 3.1) internal successors, (93), 30 states have internal predecessors, (93), 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 16:48:40,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:48:40,786 INFO L93 Difference]: Finished difference Result 278 states and 325 transitions. [2021-11-23 16:48:40,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-23 16:48:40,788 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.1) internal successors, (93), 30 states have internal predecessors, (93), 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 28 [2021-11-23 16:48:40,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:48:40,790 INFO L225 Difference]: With dead ends: 278 [2021-11-23 16:48:40,790 INFO L226 Difference]: Without dead ends: 252 [2021-11-23 16:48:40,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=425, Invalid=1555, Unknown=0, NotChecked=0, Total=1980 [2021-11-23 16:48:40,791 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 244 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-23 16:48:40,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 298 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 334 Invalid, 0 Unknown, 101 Unchecked, 1.4s Time] [2021-11-23 16:48:40,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-11-23 16:48:40,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 250. [2021-11-23 16:48:40,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 245 states have (on average 1.2) internal successors, (294), 249 states have internal predecessors, (294), 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 16:48:40,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 294 transitions. [2021-11-23 16:48:40,798 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 294 transitions. Word has length 28 [2021-11-23 16:48:40,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:48:40,798 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 294 transitions. [2021-11-23 16:48:40,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.1) internal successors, (93), 30 states have internal predecessors, (93), 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 16:48:40,799 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 294 transitions. [2021-11-23 16:48:40,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-23 16:48:40,799 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:48:40,800 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:48:40,837 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2021-11-23 16:48:41,014 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (80)] Ended with exit code 0 [2021-11-23 16:48:41,220 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (79)] Forceful destruction successful, exit code 0 [2021-11-23 16:48:41,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:48:41,413 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 16:48:41,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:48:41,413 INFO L85 PathProgramCache]: Analyzing trace with hash -761440727, now seen corresponding path program 2 times [2021-11-23 16:48:41,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:48:41,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1300798203] [2021-11-23 16:48:41,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 16:48:41,413 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:48:41,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:48:41,414 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:48:41,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (82)] Waiting until timeout for monitored process [2021-11-23 16:48:41,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 16:48:41,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:48:41,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-23 16:48:41,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:48:41,563 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 16:48:41,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 16:48:41,882 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:48:41,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:48:43,031 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:48:43,031 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:48:43,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1300798203] [2021-11-23 16:48:43,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1300798203] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:48:43,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [109517939] [2021-11-23 16:48:43,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 16:48:43,031 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:48:43,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:48:43,032 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:48:43,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (83)] Waiting until timeout for monitored process [2021-11-23 16:48:43,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 16:48:43,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:48:43,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-23 16:48:43,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:48:43,268 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 16:48:43,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 16:48:44,302 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:48:44,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:48:46,573 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:48:46,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [109517939] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:48:46,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429698128] [2021-11-23 16:48:46,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 16:48:46,573 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:48:46,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:48:46,574 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:48:46,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-11-23 16:48:46,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 16:48:46,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:48:46,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-23 16:48:46,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:48:46,710 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 16:48:46,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 16:48:47,687 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:48:47,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:48:51,201 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:48:51,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429698128] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:48:51,201 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:48:51,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 13, 13, 13, 14] total 52 [2021-11-23 16:48:51,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968503818] [2021-11-23 16:48:51,202 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:48:51,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-11-23 16:48:51,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:48:51,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-11-23 16:48:51,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=525, Invalid=2231, Unknown=0, NotChecked=0, Total=2756 [2021-11-23 16:48:51,203 INFO L87 Difference]: Start difference. First operand 250 states and 294 transitions. Second operand has 53 states, 52 states have (on average 2.3846153846153846) internal successors, (124), 53 states have internal predecessors, (124), 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 16:48:54,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:48:54,419 INFO L93 Difference]: Finished difference Result 475 states and 530 transitions. [2021-11-23 16:48:54,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-23 16:48:54,420 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 2.3846153846153846) internal successors, (124), 53 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-23 16:48:54,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:48:54,422 INFO L225 Difference]: With dead ends: 475 [2021-11-23 16:48:54,423 INFO L226 Difference]: Without dead ends: 475 [2021-11-23 16:48:54,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1371 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=1025, Invalid=3531, Unknown=0, NotChecked=0, Total=4556 [2021-11-23 16:48:54,425 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 825 mSDsluCounter, 677 mSDsCounter, 0 mSdLazyCounter, 958 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 825 SdHoareTripleChecker+Valid, 724 SdHoareTripleChecker+Invalid, 1107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 958 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-23 16:48:54,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [825 Valid, 724 Invalid, 1107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 958 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-11-23 16:48:54,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-11-23 16:48:54,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 250. [2021-11-23 16:48:54,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 245 states have (on average 1.1918367346938776) internal successors, (292), 249 states have internal predecessors, (292), 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 16:48:54,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 292 transitions. [2021-11-23 16:48:54,434 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 292 transitions. Word has length 29 [2021-11-23 16:48:54,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:48:54,435 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 292 transitions. [2021-11-23 16:48:54,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 2.3846153846153846) internal successors, (124), 53 states have internal predecessors, (124), 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 16:48:54,435 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 292 transitions. [2021-11-23 16:48:54,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-23 16:48:54,436 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:48:54,436 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:48:54,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (82)] Forceful destruction successful, exit code 0 [2021-11-23 16:48:54,670 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2021-11-23 16:48:54,850 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (83)] Ended with exit code 0 [2021-11-23 16:48:55,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 16:48:55,049 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 16:48:55,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:48:55,049 INFO L85 PathProgramCache]: Analyzing trace with hash -35087801, now seen corresponding path program 1 times [2021-11-23 16:48:55,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:48:55,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1639321714] [2021-11-23 16:48:55,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:48:55,050 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:48:55,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:48:55,051 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:48:55,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (85)] Waiting until timeout for monitored process [2021-11-23 16:48:55,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:48:55,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-23 16:48:55,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:48:55,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2021-11-23 16:48:55,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-23 16:48:55,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-23 16:48:55,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-11-23 16:48:55,664 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 16:48:55,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-11-23 16:48:56,062 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 16:48:56,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:48:57,001 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 16:48:57,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2021-11-23 16:48:57,016 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 16:48:57,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 38 [2021-11-23 16:48:57,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-11-23 16:48:57,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:48:57,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2021-11-23 16:48:57,540 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 16:48:57,541 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:48:57,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1639321714] [2021-11-23 16:48:57,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1639321714] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:48:57,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1143862425] [2021-11-23 16:48:57,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:48:57,541 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:48:57,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:48:57,543 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:48:57,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (86)] Waiting until timeout for monitored process [2021-11-23 16:48:57,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:48:57,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-23 16:48:57,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:48:57,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-11-23 16:48:58,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-23 16:48:58,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-11-23 16:48:58,706 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 16:48:58,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-11-23 16:48:59,731 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 16:48:59,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:49:00,689 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 16:49:00,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 38 [2021-11-23 16:49:00,798 INFO L354 Elim1Store]: treesize reduction 6, result has 83.8 percent of original size [2021-11-23 16:49:00,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 81 [2021-11-23 16:49:00,828 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 16:49:00,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 40 [2021-11-23 16:49:01,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-11-23 16:49:01,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:49:01,814 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 16:49:01,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1143862425] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:49:01,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866343768] [2021-11-23 16:49:01,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:49:01,814 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:49:01,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:49:01,815 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:49:01,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2021-11-23 16:49:01,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:49:01,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-23 16:49:01,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:49:01,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-11-23 16:49:02,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-23 16:49:02,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-11-23 16:49:02,246 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 16:49:02,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-11-23 16:49:03,248 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 16:49:03,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:49:03,577 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 16:49:03,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2021-11-23 16:49:03,598 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 16:49:03,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 38 [2021-11-23 16:49:03,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-11-23 16:49:03,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-11-23 16:49:04,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:49:04,194 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 16:49:04,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866343768] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:49:04,195 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:49:04,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 11, 11, 10, 9] total 33 [2021-11-23 16:49:04,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546531328] [2021-11-23 16:49:04,195 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:49:04,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-23 16:49:04,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:49:04,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-23 16:49:04,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=976, Unknown=6, NotChecked=0, Total=1122 [2021-11-23 16:49:04,197 INFO L87 Difference]: Start difference. First operand 250 states and 292 transitions. Second operand has 34 states, 33 states have (on average 2.696969696969697) internal successors, (89), 34 states have internal predecessors, (89), 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 16:49:05,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:49:05,295 INFO L93 Difference]: Finished difference Result 259 states and 302 transitions. [2021-11-23 16:49:05,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-23 16:49:05,297 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.696969696969697) internal successors, (89), 34 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-23 16:49:05,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:49:05,298 INFO L225 Difference]: With dead ends: 259 [2021-11-23 16:49:05,298 INFO L226 Difference]: Without dead ends: 246 [2021-11-23 16:49:05,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 140 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=229, Invalid=1247, Unknown=6, NotChecked=0, Total=1482 [2021-11-23 16:49:05,300 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 76 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 16:49:05,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 278 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 170 Invalid, 0 Unknown, 132 Unchecked, 0.6s Time] [2021-11-23 16:49:05,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-11-23 16:49:05,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 234. [2021-11-23 16:49:05,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 229 states have (on average 1.1877729257641922) internal successors, (272), 233 states have internal predecessors, (272), 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 16:49:05,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 272 transitions. [2021-11-23 16:49:05,305 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 272 transitions. Word has length 30 [2021-11-23 16:49:05,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:49:05,305 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 272 transitions. [2021-11-23 16:49:05,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.696969696969697) internal successors, (89), 34 states have internal predecessors, (89), 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 16:49:05,306 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 272 transitions. [2021-11-23 16:49:05,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-23 16:49:05,307 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:49:05,307 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 16:49:05,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (86)] Forceful destruction successful, exit code 0 [2021-11-23 16:49:05,533 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2021-11-23 16:49:05,719 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (85)] Ended with exit code 0 [2021-11-23 16:49:05,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:49:05,911 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 16:49:05,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:49:05,911 INFO L85 PathProgramCache]: Analyzing trace with hash -696429561, now seen corresponding path program 1 times [2021-11-23 16:49:05,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:49:05,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1805688649] [2021-11-23 16:49:05,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:49:05,912 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:49:05,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:49:05,913 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:49:05,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (88)] Waiting until timeout for monitored process [2021-11-23 16:49:06,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:49:06,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 16:49:06,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:49:06,699 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 16:49:06,699 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:49:06,699 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:49:06,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1805688649] [2021-11-23 16:49:06,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1805688649] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:49:06,699 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:49:06,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:49:06,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558470493] [2021-11-23 16:49:06,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:49:06,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 16:49:06,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:49:06,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 16:49:06,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:49:06,700 INFO L87 Difference]: Start difference. First operand 234 states and 272 transitions. Second operand has 5 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 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 16:49:06,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:49:06,707 INFO L93 Difference]: Finished difference Result 233 states and 271 transitions. [2021-11-23 16:49:06,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 16:49:06,709 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-11-23 16:49:06,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:49:06,710 INFO L225 Difference]: With dead ends: 233 [2021-11-23 16:49:06,710 INFO L226 Difference]: Without dead ends: 230 [2021-11-23 16:49:06,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:49:06,711 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 8 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:49:06,711 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 57 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 11 Unchecked, 0.0s Time] [2021-11-23 16:49:06,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-11-23 16:49:06,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 230. [2021-11-23 16:49:06,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 226 states have (on average 1.176991150442478) internal successors, (266), 229 states have internal predecessors, (266), 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 16:49:06,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 266 transitions. [2021-11-23 16:49:06,725 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 266 transitions. Word has length 33 [2021-11-23 16:49:06,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:49:06,725 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 266 transitions. [2021-11-23 16:49:06,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 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 16:49:06,726 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 266 transitions. [2021-11-23 16:49:06,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-23 16:49:06,726 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:49:06,727 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:49:06,742 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (88)] Forceful destruction successful, exit code 0 [2021-11-23 16:49:06,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:49:06,939 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 16:49:06,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:49:06,939 INFO L85 PathProgramCache]: Analyzing trace with hash -95622117, now seen corresponding path program 3 times [2021-11-23 16:49:06,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:49:06,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1626104643] [2021-11-23 16:49:06,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 16:49:06,940 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:49:06,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:49:06,941 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:49:06,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (89)] Waiting until timeout for monitored process [2021-11-23 16:49:07,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-23 16:49:07,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:49:07,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-23 16:49:07,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:49:07,292 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 16:49:07,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 16:49:08,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-23 16:49:09,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:49:09,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:49:09,380 INFO L354 Elim1Store]: treesize reduction 14, result has 57.6 percent of original size [2021-11-23 16:49:09,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 39 [2021-11-23 16:49:10,685 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:49:10,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:49:12,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 47 [2021-11-23 16:49:12,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:49:12,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:49:12,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:49:12,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 87 [2021-11-23 16:49:15,021 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-23 16:49:15,021 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:49:15,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1626104643] [2021-11-23 16:49:15,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1626104643] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:49:15,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1695082537] [2021-11-23 16:49:15,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 16:49:15,022 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:49:15,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:49:15,036 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:49:15,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (90)] Waiting until timeout for monitored process [2021-11-23 16:49:15,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-23 16:49:15,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:49:15,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-23 16:49:15,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:49:15,650 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 16:49:15,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 16:49:17,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-23 16:49:17,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-11-23 16:49:20,100 INFO L354 Elim1Store]: treesize reduction 25, result has 39.0 percent of original size [2021-11-23 16:49:20,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 49 treesize of output 42 [2021-11-23 16:49:20,263 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:49:20,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:49:22,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 64 [2021-11-23 16:49:22,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:49:22,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:49:22,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:49:22,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:49:22,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:49:22,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:49:22,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 111 [2021-11-23 16:49:32,596 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 16 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:49:32,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1695082537] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:49:32,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880210120] [2021-11-23 16:49:32,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 16:49:32,597 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:49:32,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:49:32,597 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:49:32,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2021-11-23 16:49:32,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-23 16:49:32,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:49:32,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-23 16:49:32,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:49:32,916 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 16:49:32,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 16:49:36,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-23 16:49:40,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-11-23 16:49:40,426 INFO L354 Elim1Store]: treesize reduction 19, result has 38.7 percent of original size [2021-11-23 16:49:40,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 32 [2021-11-23 16:49:40,438 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:49:40,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:49:43,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 48 [2021-11-23 16:49:43,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:49:43,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:49:43,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:49:43,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 81 [2021-11-23 16:49:57,014 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:49:57,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880210120] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:49:57,014 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:49:57,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 20, 20, 20, 22] total 99 [2021-11-23 16:49:57,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010841198] [2021-11-23 16:49:57,014 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:49:57,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2021-11-23 16:49:57,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:49:57,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2021-11-23 16:49:57,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=735, Invalid=8967, Unknown=0, NotChecked=0, Total=9702 [2021-11-23 16:49:57,016 INFO L87 Difference]: Start difference. First operand 230 states and 266 transitions. Second operand has 99 states, 99 states have (on average 1.6767676767676767) internal successors, (166), 99 states have internal predecessors, (166), 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 16:50:45,856 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 16:51:21,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:51:21,963 INFO L93 Difference]: Finished difference Result 350 states and 392 transitions. [2021-11-23 16:51:21,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-11-23 16:51:21,965 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 1.6767676767676767) internal successors, (166), 99 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-11-23 16:51:21,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:51:21,967 INFO L225 Difference]: With dead ends: 350 [2021-11-23 16:51:21,967 INFO L226 Difference]: Without dead ends: 310 [2021-11-23 16:51:21,970 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 110 SyntacticMatches, 13 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10105 ImplicationChecksByTransitivity, 110.8s TimeCoverageRelationStatistics Valid=2939, Invalid=26817, Unknown=0, NotChecked=0, Total=29756 [2021-11-23 16:51:21,971 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 539 mSDsluCounter, 682 mSDsCounter, 0 mSdLazyCounter, 1748 mSolverCounterSat, 240 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 539 SdHoareTripleChecker+Valid, 705 SdHoareTripleChecker+Invalid, 2459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 1748 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 470 IncrementalHoareTripleChecker+Unchecked, 11.6s IncrementalHoareTripleChecker+Time [2021-11-23 16:51:21,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [539 Valid, 705 Invalid, 2459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 1748 Invalid, 1 Unknown, 470 Unchecked, 11.6s Time] [2021-11-23 16:51:21,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-11-23 16:51:21,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 238. [2021-11-23 16:51:21,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 234 states have (on average 1.1837606837606838) internal successors, (277), 237 states have internal predecessors, (277), 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 16:51:21,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 277 transitions. [2021-11-23 16:51:21,978 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 277 transitions. Word has length 33 [2021-11-23 16:51:21,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:51:21,978 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 277 transitions. [2021-11-23 16:51:21,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 1.6767676767676767) internal successors, (166), 99 states have internal predecessors, (166), 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 16:51:21,979 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 277 transitions. [2021-11-23 16:51:21,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-23 16:51:21,980 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:51:21,980 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 16:51:21,995 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (90)] Forceful destruction successful, exit code 0 [2021-11-23 16:51:22,219 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2021-11-23 16:51:22,428 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (89)] Forceful destruction successful, exit code 0 [2021-11-23 16:51:22,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:51:22,613 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 16:51:22,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:51:22,613 INFO L85 PathProgramCache]: Analyzing trace with hash 846553876, now seen corresponding path program 1 times [2021-11-23 16:51:22,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:51:22,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1602019780] [2021-11-23 16:51:22,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:51:22,613 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:51:22,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:51:22,614 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:51:22,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (92)] Waiting until timeout for monitored process [2021-11-23 16:51:22,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:51:22,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-23 16:51:22,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:51:22,784 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 16:51:22,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 16:51:23,317 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:51:23,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:51:25,170 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:51:25,170 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:51:25,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1602019780] [2021-11-23 16:51:25,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1602019780] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:51:25,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [230501881] [2021-11-23 16:51:25,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:51:25,171 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:51:25,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:51:25,171 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:51:25,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (93)] Waiting until timeout for monitored process [2021-11-23 16:51:25,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:51:25,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-23 16:51:25,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:51:25,430 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 16:51:25,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 16:51:26,493 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:51:26,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:51:28,409 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:51:28,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [230501881] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:51:28,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912374983] [2021-11-23 16:51:28,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:51:28,410 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:51:28,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:51:28,411 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:51:28,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2021-11-23 16:51:28,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:51:28,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-23 16:51:28,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:51:28,579 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 16:51:28,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 16:51:28,964 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:51:28,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:51:29,635 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:51:29,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912374983] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:51:29,635 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:51:29,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 12, 12, 12, 12] total 38 [2021-11-23 16:51:29,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117314266] [2021-11-23 16:51:29,635 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:51:29,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-23 16:51:29,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:51:29,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-23 16:51:29,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=1254, Unknown=0, NotChecked=0, Total=1482 [2021-11-23 16:51:29,636 INFO L87 Difference]: Start difference. First operand 238 states and 277 transitions. Second operand has 39 states, 38 states have (on average 2.973684210526316) internal successors, (113), 39 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:51:34,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:51:34,179 INFO L93 Difference]: Finished difference Result 316 states and 356 transitions. [2021-11-23 16:51:34,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-23 16:51:34,180 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.973684210526316) internal successors, (113), 39 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-23 16:51:34,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:51:34,181 INFO L225 Difference]: With dead ends: 316 [2021-11-23 16:51:34,181 INFO L226 Difference]: Without dead ends: 316 [2021-11-23 16:51:34,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 166 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 921 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=770, Invalid=3012, Unknown=0, NotChecked=0, Total=3782 [2021-11-23 16:51:34,182 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 659 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 659 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-23 16:51:34,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [659 Valid, 328 Invalid, 799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 661 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-23 16:51:34,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-11-23 16:51:34,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 253. [2021-11-23 16:51:34,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 249 states have (on average 1.176706827309237) internal successors, (293), 252 states have internal predecessors, (293), 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 16:51:34,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 293 transitions. [2021-11-23 16:51:34,193 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 293 transitions. Word has length 35 [2021-11-23 16:51:34,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:51:34,194 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 293 transitions. [2021-11-23 16:51:34,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.973684210526316) internal successors, (113), 39 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:51:34,194 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 293 transitions. [2021-11-23 16:51:34,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-23 16:51:34,195 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:51:34,195 INFO L514 BasicCegarLoop]: trace histogram [3, 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] [2021-11-23 16:51:34,220 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (92)] Ended with exit code 0 [2021-11-23 16:51:34,409 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (93)] Ended with exit code 0 [2021-11-23 16:51:34,630 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2021-11-23 16:51:34,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,94 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:51:34,808 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 16:51:34,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:51:34,809 INFO L85 PathProgramCache]: Analyzing trace with hash -1310569203, now seen corresponding path program 1 times [2021-11-23 16:51:34,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:51:34,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [675462681] [2021-11-23 16:51:34,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:51:34,809 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:51:34,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:51:34,810 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:51:34,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (95)] Waiting until timeout for monitored process [2021-11-23 16:51:34,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:51:34,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-23 16:51:35,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:51:35,051 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 16:51:35,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 16:51:35,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-11-23 16:51:35,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-23 16:51:35,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2021-11-23 16:51:35,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2021-11-23 16:51:36,038 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 16:51:36,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2021-11-23 16:51:36,535 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 16:51:36,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:51:38,267 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 16:51:38,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2021-11-23 16:51:38,294 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 16:51:38,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 42 [2021-11-23 16:51:38,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 16:51:39,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:51:39,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:51:39,299 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 16:51:39,300 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:51:39,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [675462681] [2021-11-23 16:51:39,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [675462681] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:51:39,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1274084335] [2021-11-23 16:51:39,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:51:39,300 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:51:39,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:51:39,301 INFO L229 MonitoredProcess]: Starting monitored process 96 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:51:39,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (96)] Waiting until timeout for monitored process [2021-11-23 16:51:39,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:51:39,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-23 16:51:39,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:51:39,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2021-11-23 16:51:40,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-23 16:51:40,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2021-11-23 16:51:41,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 16:51:42,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:51:42,022 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 16:51:42,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 12 [2021-11-23 16:51:42,124 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:51:42,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:51:42,417 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1266 (Array (_ BitVec 32) (_ BitVec 32)))) (= ((_ extract 7 0) ((_ sign_extend 24) (_ bv0 8))) ((_ extract 7 0) (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_1266) |c_ULTIMATE.start_cstrcat_~s2#1.base|) |c_ULTIMATE.start_cstrcat_~s2#1.offset|)))) is different from false [2021-11-23 16:51:42,428 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1266 (Array (_ BitVec 32) (_ BitVec 32)))) (= ((_ extract 7 0) ((_ sign_extend 24) (_ bv0 8))) ((_ extract 7 0) (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_1266) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (bvadd |c_ULTIMATE.start_cstrcat_~s2#1.offset| (_ bv1 32)))))) is different from false [2021-11-23 16:51:43,149 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 16:51:43,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 45 [2021-11-23 16:51:43,183 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 16:51:43,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 63 [2021-11-23 16:51:43,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-23 16:51:43,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 29 [2021-11-23 16:51:43,301 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 16:51:43,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 83 [2021-11-23 16:51:44,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:51:44,590 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 3 not checked. [2021-11-23 16:51:44,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1274084335] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:51:44,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665153987] [2021-11-23 16:51:44,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:51:44,591 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:51:44,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:51:44,592 INFO L229 MonitoredProcess]: Starting monitored process 97 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:51:44,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2021-11-23 16:51:44,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:51:44,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-23 16:51:44,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:51:44,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-11-23 16:51:45,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-23 16:51:45,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-11-23 16:51:46,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-11-23 16:51:46,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:51:46,195 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 16:51:46,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 12 [2021-11-23 16:51:46,204 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 16:51:46,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:51:46,317 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1291 (Array (_ BitVec 32) (_ BitVec 32)))) (= ((_ extract 7 0) ((_ sign_extend 24) (_ bv0 8))) ((_ extract 7 0) (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_1291) |c_ULTIMATE.start_cstrcat_~s2#1.base|) |c_ULTIMATE.start_cstrcat_~s2#1.offset|)))) is different from false [2021-11-23 16:51:46,335 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1291 (Array (_ BitVec 32) (_ BitVec 32)))) (= ((_ extract 7 0) ((_ sign_extend 24) (_ bv0 8))) ((_ extract 7 0) (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_1291) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (bvadd |c_ULTIMATE.start_cstrcat_~s2#1.offset| (_ bv1 32)))))) is different from false [2021-11-23 16:51:46,351 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1291 (Array (_ BitVec 32) (_ BitVec 32)))) (= ((_ extract 7 0) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1291) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (bvadd |c_ULTIMATE.start_main_~nondetString1~0#1.offset| (_ bv1 32)))) ((_ extract 7 0) ((_ sign_extend 24) (_ bv0 8))))) is different from false [2021-11-23 16:51:46,383 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 16:51:46,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 28 [2021-11-23 16:51:46,405 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 16:51:46,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 44 [2021-11-23 16:51:46,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-23 16:51:48,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:51:48,404 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 3 not checked. [2021-11-23 16:51:48,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665153987] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:51:48,404 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:51:48,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 18, 15, 13, 12] total 65 [2021-11-23 16:51:48,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524639025] [2021-11-23 16:51:48,405 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:51:48,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-11-23 16:51:48,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:51:48,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-11-23 16:51:48,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=3259, Unknown=6, NotChecked=600, Total=4160 [2021-11-23 16:51:48,408 INFO L87 Difference]: Start difference. First operand 253 states and 293 transitions. Second operand has 65 states, 65 states have (on average 2.476923076923077) internal successors, (161), 65 states have internal predecessors, (161), 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 16:51:58,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:51:58,793 INFO L93 Difference]: Finished difference Result 344 states and 387 transitions. [2021-11-23 16:51:58,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-11-23 16:51:58,795 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.476923076923077) internal successors, (161), 65 states have internal predecessors, (161), 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 36 [2021-11-23 16:51:58,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:51:58,797 INFO L225 Difference]: With dead ends: 344 [2021-11-23 16:51:58,797 INFO L226 Difference]: Without dead ends: 313 [2021-11-23 16:51:58,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 145 SyntacticMatches, 3 SemanticMatches, 104 ConstructedPredicates, 5 IntricatePredicates, 3 DeprecatedPredicates, 3198 ImplicationChecksByTransitivity, 18.1s TimeCoverageRelationStatistics Valid=921, Invalid=9193, Unknown=6, NotChecked=1010, Total=11130 [2021-11-23 16:51:58,798 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 208 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 519 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-23 16:51:58,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 489 Invalid, 839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 273 Invalid, 0 Unknown, 519 Unchecked, 0.8s Time] [2021-11-23 16:51:58,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-11-23 16:51:58,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 286. [2021-11-23 16:51:58,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 282 states have (on average 1.1595744680851063) internal successors, (327), 285 states have internal predecessors, (327), 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 16:51:58,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 327 transitions. [2021-11-23 16:51:58,803 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 327 transitions. Word has length 36 [2021-11-23 16:51:58,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:51:58,804 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 327 transitions. [2021-11-23 16:51:58,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.476923076923077) internal successors, (161), 65 states have internal predecessors, (161), 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 16:51:58,804 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 327 transitions. [2021-11-23 16:51:58,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-23 16:51:58,805 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:51:58,805 INFO L514 BasicCegarLoop]: trace histogram [3, 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] [2021-11-23 16:51:58,820 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (95)] Forceful destruction successful, exit code 0 [2021-11-23 16:51:59,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (96)] Forceful destruction successful, exit code 0 [2021-11-23 16:51:59,244 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2021-11-23 16:51:59,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,96 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,97 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:51:59,420 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 16:51:59,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:51:59,421 INFO L85 PathProgramCache]: Analyzing trace with hash -361405806, now seen corresponding path program 1 times [2021-11-23 16:51:59,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:51:59,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1772510692] [2021-11-23 16:51:59,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:51:59,421 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:51:59,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:51:59,422 INFO L229 MonitoredProcess]: Starting monitored process 98 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:51:59,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (98)] Waiting until timeout for monitored process [2021-11-23 16:51:59,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:51:59,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-23 16:51:59,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:52:00,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-23 16:52:01,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:52:01,273 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 16:52:01,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 12 [2021-11-23 16:52:01,337 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 16:52:01,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:52:01,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-11-23 16:52:01,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2021-11-23 16:52:03,147 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 16:52:03,147 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:52:03,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1772510692] [2021-11-23 16:52:03,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1772510692] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:52:03,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2103739625] [2021-11-23 16:52:03,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:52:03,148 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:52:03,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:52:03,148 INFO L229 MonitoredProcess]: Starting monitored process 99 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:52:03,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (99)] Waiting until timeout for monitored process [2021-11-23 16:52:03,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:52:03,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-23 16:52:03,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:52:05,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-23 16:52:06,902 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 16:52:06,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:52:07,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2021-11-23 16:52:07,686 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-23 16:52:07,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 60 [2021-11-23 16:52:08,898 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 16:52:08,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2103739625] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:52:08,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237996877] [2021-11-23 16:52:08,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:52:08,898 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:52:08,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:52:08,899 INFO L229 MonitoredProcess]: Starting monitored process 100 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:52:08,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2021-11-23 16:52:09,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:52:09,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-23 16:52:09,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:52:09,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-11-23 16:52:10,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-23 16:52:10,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-11-23 16:52:11,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-11-23 16:52:11,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:52:11,919 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 16:52:11,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 12 [2021-11-23 16:52:12,073 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 16:52:12,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:52:12,612 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1360 (Array (_ BitVec 32) (_ BitVec 32)))) (= ((_ extract 7 0) ((_ sign_extend 24) (_ bv0 8))) ((_ extract 7 0) (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_1360) |c_ULTIMATE.start_cstrcat_~s2#1.base|) |c_ULTIMATE.start_cstrcat_~s2#1.offset|)))) is different from false [2021-11-23 16:52:12,625 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1360 (Array (_ BitVec 32) (_ BitVec 32)))) (= ((_ extract 7 0) ((_ sign_extend 24) (_ bv0 8))) ((_ extract 7 0) (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_1360) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (bvadd |c_ULTIMATE.start_cstrcat_~s2#1.offset| (_ bv1 32)))))) is different from false [2021-11-23 16:52:12,658 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1360 (Array (_ BitVec 32) (_ BitVec 32)))) (= ((_ extract 7 0) ((_ sign_extend 24) (_ bv0 8))) ((_ extract 7 0) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1360) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (bvadd |c_ULTIMATE.start_main_~nondetString1~0#1.offset| (_ bv1 32)))))) is different from false [2021-11-23 16:52:12,700 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 16:52:12,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 28 [2021-11-23 16:52:12,722 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 16:52:12,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 44 [2021-11-23 16:52:12,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-23 16:52:15,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:52:15,394 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 3 not checked. [2021-11-23 16:52:15,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237996877] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:52:15,394 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:52:15,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 16, 18, 13, 12] total 66 [2021-11-23 16:52:15,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751351570] [2021-11-23 16:52:15,395 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:52:15,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-11-23 16:52:15,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:52:15,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-11-23 16:52:15,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=3537, Unknown=3, NotChecked=372, Total=4290 [2021-11-23 16:52:15,397 INFO L87 Difference]: Start difference. First operand 286 states and 327 transitions. Second operand has 66 states, 66 states have (on average 2.196969696969697) internal successors, (145), 66 states have internal predecessors, (145), 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 16:52:22,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:52:22,737 INFO L93 Difference]: Finished difference Result 349 states and 395 transitions. [2021-11-23 16:52:22,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-23 16:52:22,738 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.196969696969697) internal successors, (145), 66 states have internal predecessors, (145), 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 38 [2021-11-23 16:52:22,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:52:22,740 INFO L225 Difference]: With dead ends: 349 [2021-11-23 16:52:22,740 INFO L226 Difference]: Without dead ends: 336 [2021-11-23 16:52:22,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 160 SyntacticMatches, 9 SemanticMatches, 88 ConstructedPredicates, 3 IntricatePredicates, 3 DeprecatedPredicates, 2314 ImplicationChecksByTransitivity, 17.2s TimeCoverageRelationStatistics Valid=828, Invalid=6663, Unknown=3, NotChecked=516, Total=8010 [2021-11-23 16:52:22,741 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 222 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 1072 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 624 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-23 16:52:22,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 545 Invalid, 1072 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 416 Invalid, 0 Unknown, 624 Unchecked, 0.9s Time] [2021-11-23 16:52:22,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-11-23 16:52:22,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 294. [2021-11-23 16:52:22,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 290 states have (on average 1.1620689655172414) internal successors, (337), 293 states have internal predecessors, (337), 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 16:52:22,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 337 transitions. [2021-11-23 16:52:22,747 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 337 transitions. Word has length 38 [2021-11-23 16:52:22,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:52:22,747 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 337 transitions. [2021-11-23 16:52:22,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.196969696969697) internal successors, (145), 66 states have internal predecessors, (145), 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 16:52:22,747 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 337 transitions. [2021-11-23 16:52:22,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-23 16:52:22,748 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:52:22,748 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:52:22,760 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (98)] Forceful destruction successful, exit code 0 [2021-11-23 16:52:22,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2021-11-23 16:52:23,174 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (99)] Ended with exit code 0 [2021-11-23 16:52:23,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,100 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,99 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 16:52:23,372 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 16:52:23,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:52:23,373 INFO L85 PathProgramCache]: Analyzing trace with hash -2078988342, now seen corresponding path program 2 times [2021-11-23 16:52:23,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:52:23,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1758981013] [2021-11-23 16:52:23,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 16:52:23,373 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:52:23,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:52:23,374 INFO L229 MonitoredProcess]: Starting monitored process 101 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:52:23,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (101)] Waiting until timeout for monitored process [2021-11-23 16:52:23,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 16:52:23,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:52:23,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-23 16:52:23,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:52:23,612 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 16:52:23,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 16:52:24,330 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:52:24,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:52:26,570 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:52:26,570 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:52:26,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1758981013] [2021-11-23 16:52:26,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1758981013] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:52:26,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [941332603] [2021-11-23 16:52:26,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 16:52:26,571 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:52:26,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:52:26,572 INFO L229 MonitoredProcess]: Starting monitored process 102 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:52:26,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (102)] Waiting until timeout for monitored process [2021-11-23 16:52:26,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 16:52:26,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:52:26,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-23 16:52:26,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:52:26,870 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 16:52:26,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 16:52:28,537 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:52:28,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:52:32,218 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:52:32,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [941332603] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:52:32,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863272127] [2021-11-23 16:52:32,218 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 16:52:32,218 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:52:32,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:52:32,219 INFO L229 MonitoredProcess]: Starting monitored process 103 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:52:32,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2021-11-23 16:52:32,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 16:52:32,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:52:32,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-23 16:52:32,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:52:32,391 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 16:52:32,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 16:52:33,603 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:52:33,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:52:39,376 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:52:39,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863272127] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:52:39,376 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:52:39,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 15, 15, 16, 17] total 64 [2021-11-23 16:52:39,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610185868] [2021-11-23 16:52:39,377 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:52:39,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-11-23 16:52:39,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:52:39,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-11-23 16:52:39,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=611, Invalid=3549, Unknown=0, NotChecked=0, Total=4160 [2021-11-23 16:52:39,379 INFO L87 Difference]: Start difference. First operand 294 states and 337 transitions. Second operand has 65 states, 64 states have (on average 2.8125) internal successors, (180), 65 states have internal predecessors, (180), 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 16:52:55,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:52:55,222 INFO L93 Difference]: Finished difference Result 445 states and 488 transitions. [2021-11-23 16:52:55,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-11-23 16:52:55,224 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 64 states have (on average 2.8125) internal successors, (180), 65 states have internal predecessors, (180), 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 41 [2021-11-23 16:52:55,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:52:55,225 INFO L225 Difference]: With dead ends: 445 [2021-11-23 16:52:55,226 INFO L226 Difference]: Without dead ends: 422 [2021-11-23 16:52:55,227 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3360 ImplicationChecksByTransitivity, 21.4s TimeCoverageRelationStatistics Valid=2328, Invalid=9662, Unknown=0, NotChecked=0, Total=11990 [2021-11-23 16:52:55,227 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 1193 mSDsluCounter, 587 mSDsCounter, 0 mSdLazyCounter, 1615 mSolverCounterSat, 288 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1193 SdHoareTripleChecker+Valid, 617 SdHoareTripleChecker+Invalid, 1903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 288 IncrementalHoareTripleChecker+Valid, 1615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2021-11-23 16:52:55,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1193 Valid, 617 Invalid, 1903 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [288 Valid, 1615 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2021-11-23 16:52:55,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2021-11-23 16:52:55,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 361. [2021-11-23 16:52:55,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 357 states have (on average 1.1512605042016806) internal successors, (411), 360 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:52:55,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 411 transitions. [2021-11-23 16:52:55,235 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 411 transitions. Word has length 41 [2021-11-23 16:52:55,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:52:55,236 INFO L470 AbstractCegarLoop]: Abstraction has 361 states and 411 transitions. [2021-11-23 16:52:55,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 64 states have (on average 2.8125) internal successors, (180), 65 states have internal predecessors, (180), 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 16:52:55,236 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 411 transitions. [2021-11-23 16:52:55,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-23 16:52:55,237 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:52:55,237 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:52:55,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (102)] Forceful destruction successful, exit code 0 [2021-11-23 16:52:55,465 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2021-11-23 16:52:55,649 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (101)] Forceful destruction successful, exit code 0 [2021-11-23 16:52:55,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,103 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,101 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:52:55,841 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 16:52:55,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:52:55,842 INFO L85 PathProgramCache]: Analyzing trace with hash -783098450, now seen corresponding path program 1 times [2021-11-23 16:52:55,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:52:55,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [21660191] [2021-11-23 16:52:55,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:52:55,842 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:52:55,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:52:55,843 INFO L229 MonitoredProcess]: Starting monitored process 104 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:52:55,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (104)] Waiting until timeout for monitored process [2021-11-23 16:52:56,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:52:56,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-23 16:52:56,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:52:56,126 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 16:52:56,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 16:52:57,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-23 16:52:59,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:52:59,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:52:59,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:52:59,412 INFO L354 Elim1Store]: treesize reduction 14, result has 60.0 percent of original size [2021-11-23 16:52:59,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 41 [2021-11-23 16:53:01,240 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:53:01,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:53:03,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 47 [2021-11-23 16:53:03,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:53:03,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:53:03,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:53:03,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 87 [2021-11-23 16:53:10,815 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 11 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:53:10,816 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:53:10,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [21660191] [2021-11-23 16:53:10,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [21660191] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:53:10,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1036085970] [2021-11-23 16:53:10,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:53:10,816 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:53:10,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:53:10,817 INFO L229 MonitoredProcess]: Starting monitored process 105 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:53:10,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (105)] Waiting until timeout for monitored process [2021-11-23 16:53:11,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:53:11,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-23 16:53:11,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:53:16,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-23 16:53:19,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:53:19,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:53:19,567 INFO L354 Elim1Store]: treesize reduction 21, result has 36.4 percent of original size [2021-11-23 16:53:19,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 32 [2021-11-23 16:53:20,098 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 15 proven. 35 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 16:53:20,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:53:22,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 47 [2021-11-23 16:53:22,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:53:22,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:53:22,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:53:22,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 87 [2021-11-23 16:53:33,249 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 21 proven. 29 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 16:53:33,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1036085970] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:53:33,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127178899] [2021-11-23 16:53:33,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:53:33,250 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:53:33,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:53:33,250 INFO L229 MonitoredProcess]: Starting monitored process 106 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:53:33,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2021-11-23 16:53:33,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:53:33,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-23 16:53:33,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:53:33,484 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 16:53:33,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 16:53:40,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-23 16:53:45,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-11-23 16:53:45,188 INFO L354 Elim1Store]: treesize reduction 19, result has 38.7 percent of original size [2021-11-23 16:53:45,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 32 [2021-11-23 16:53:45,466 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 15 proven. 35 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 16:53:45,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:53:49,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 47 [2021-11-23 16:53:49,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:53:49,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:53:49,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:53:49,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 87 [2021-11-23 16:54:05,492 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 17 proven. 33 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 16:54:05,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127178899] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:54:05,492 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:54:05,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 23, 22, 23, 22] total 118 [2021-11-23 16:54:05,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15151686] [2021-11-23 16:54:05,493 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:54:05,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2021-11-23 16:54:05,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:54:05,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2021-11-23 16:54:05,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1136, Invalid=12670, Unknown=0, NotChecked=0, Total=13806 [2021-11-23 16:54:05,496 INFO L87 Difference]: Start difference. First operand 361 states and 411 transitions. Second operand has 118 states, 118 states have (on average 1.8728813559322033) internal successors, (221), 118 states have internal predecessors, (221), 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 16:56:19,120 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 16:56:21,181 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 16:57:36,078 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 16:57:38,087 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 16:58:39,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:58:39,574 INFO L93 Difference]: Finished difference Result 712 states and 792 transitions. [2021-11-23 16:58:39,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2021-11-23 16:58:39,578 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 1.8728813559322033) internal successors, (221), 118 states have internal predecessors, (221), 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 43 [2021-11-23 16:58:39,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:58:39,582 INFO L225 Difference]: With dead ends: 712 [2021-11-23 16:58:39,582 INFO L226 Difference]: Without dead ends: 703 [2021-11-23 16:58:39,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 148 SyntacticMatches, 8 SemanticMatches, 248 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19897 ImplicationChecksByTransitivity, 294.6s TimeCoverageRelationStatistics Valid=8471, Invalid=53779, Unknown=0, NotChecked=0, Total=62250 [2021-11-23 16:58:39,586 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 1822 mSDsluCounter, 994 mSDsCounter, 0 mSdLazyCounter, 3326 mSolverCounterSat, 809 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1822 SdHoareTripleChecker+Valid, 1021 SdHoareTripleChecker+Invalid, 6814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 809 IncrementalHoareTripleChecker+Valid, 3326 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 2675 IncrementalHoareTripleChecker+Unchecked, 33.7s IncrementalHoareTripleChecker+Time [2021-11-23 16:58:39,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1822 Valid, 1021 Invalid, 6814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [809 Valid, 3326 Invalid, 4 Unknown, 2675 Unchecked, 33.7s Time] [2021-11-23 16:58:39,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2021-11-23 16:58:39,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 382. [2021-11-23 16:58:39,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 378 states have (on average 1.156084656084656) internal successors, (437), 381 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:58:39,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 437 transitions. [2021-11-23 16:58:39,614 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 437 transitions. Word has length 43 [2021-11-23 16:58:39,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:58:39,615 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 437 transitions. [2021-11-23 16:58:39,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 1.8728813559322033) internal successors, (221), 118 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:58:39,615 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 437 transitions. [2021-11-23 16:58:39,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-23 16:58:39,617 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:58:39,617 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:58:39,647 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2021-11-23 16:58:39,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (105)] Forceful destruction successful, exit code 0 [2021-11-23 16:58:40,037 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (104)] Ended with exit code 0 [2021-11-23 16:58:40,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,105 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,104 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:58:40,229 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 16:58:40,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:58:40,229 INFO L85 PathProgramCache]: Analyzing trace with hash -756973992, now seen corresponding path program 2 times [2021-11-23 16:58:40,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:58:40,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2122625202] [2021-11-23 16:58:40,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 16:58:40,230 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:58:40,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:58:40,231 INFO L229 MonitoredProcess]: Starting monitored process 107 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:58:40,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (107)] Waiting until timeout for monitored process [2021-11-23 16:58:40,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 16:58:40,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:58:40,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-23 16:58:40,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:58:40,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:58:40,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-23 16:58:40,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2021-11-23 16:58:41,313 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-23 16:58:41,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:58:43,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:58:43,592 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-23 16:58:43,592 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:58:43,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2122625202] [2021-11-23 16:58:43,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2122625202] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:58:43,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2041899285] [2021-11-23 16:58:43,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 16:58:43,593 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:58:43,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:58:43,594 INFO L229 MonitoredProcess]: Starting monitored process 108 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:58:43,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (108)] Waiting until timeout for monitored process [2021-11-23 16:58:43,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 16:58:43,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:58:43,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-23 16:58:43,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:58:44,016 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 16:58:44,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 16:58:44,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-11-23 16:58:45,822 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-23 16:58:45,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:58:48,215 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-23 16:58:48,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2041899285] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:58:48,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289990405] [2021-11-23 16:58:48,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 16:58:48,216 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:58:48,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:58:48,217 INFO L229 MonitoredProcess]: Starting monitored process 109 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:58:48,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95a64f07-c549-4cad-b9b3-ed18e14ce19f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2021-11-23 16:58:48,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 16:58:48,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:58:48,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-23 16:58:48,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:58:50,620 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-23 16:58:50,620 INFO L328 TraceCheckSpWp]: Computing backward predicates...