./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem14_label48.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6a47aea7 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/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_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem14_label48.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8261a53c19f43c038d6c9bf7efdae8a565c27af3d0b11334f16494326c28bf76 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:16:52,889 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:16:52,891 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:16:52,926 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:16:52,927 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:16:52,929 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:16:52,931 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:16:52,934 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:16:52,937 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:16:52,938 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:16:52,940 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:16:52,941 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:16:52,942 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:16:52,944 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:16:52,946 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:16:52,947 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:16:52,949 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:16:52,950 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:16:52,953 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:16:52,956 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:16:52,959 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:16:52,961 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:16:52,963 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:16:52,964 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:16:52,969 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:16:52,970 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:16:52,970 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:16:52,972 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:16:52,973 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:16:52,974 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:16:52,975 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:16:52,976 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:16:52,977 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:16:52,978 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:16:52,980 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:16:52,981 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:16:52,982 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:16:52,983 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:16:52,983 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:16:52,985 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:16:52,986 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:16:52,987 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 17:16:53,025 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:16:53,026 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:16:53,026 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:16:53,027 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:16:53,027 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:16:53,028 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:16:53,028 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:16:53,029 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:16:53,029 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:16:53,029 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 17:16:53,030 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:16:53,030 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:16:53,030 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 17:16:53,031 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 17:16:53,031 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:16:53,031 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 17:16:53,032 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 17:16:53,032 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 17:16:53,033 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:16:53,033 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:16:53,033 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 17:16:53,034 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:16:53,034 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:16:53,034 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:16:53,035 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:16:53,035 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:16:53,035 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:16:53,036 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:16:53,036 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:16:53,036 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:16:53,037 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:16:53,037 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:16:53,037 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:16:53,038 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:16:53,038 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:16:53,038 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:16:53,039 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 17:16:53,039 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 17:16:53,039 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:16:53,039 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:16:53,040 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:16:53,040 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_eb304892-f04e-4fcc-909f-caed848a8ff7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8261a53c19f43c038d6c9bf7efdae8a565c27af3d0b11334f16494326c28bf76 [2021-11-23 17:16:53,302 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:16:53,328 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:16:53,331 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:16:53,333 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:16:53,334 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:16:53,335 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/eca-rers2012/Problem14_label48.c [2021-11-23 17:16:53,416 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/data/975fcdd30/c8170af656d145889998f7a1f80553e0/FLAGd6cf3444a [2021-11-23 17:16:54,099 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:16:54,100 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/sv-benchmarks/c/eca-rers2012/Problem14_label48.c [2021-11-23 17:16:54,114 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/data/975fcdd30/c8170af656d145889998f7a1f80553e0/FLAGd6cf3444a [2021-11-23 17:16:54,313 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/data/975fcdd30/c8170af656d145889998f7a1f80553e0 [2021-11-23 17:16:54,315 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:16:54,318 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:16:54,323 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:16:54,325 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:16:54,328 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:16:54,329 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:16:54" (1/1) ... [2021-11-23 17:16:54,331 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e3f0e28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:16:54, skipping insertion in model container [2021-11-23 17:16:54,333 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:16:54" (1/1) ... [2021-11-23 17:16:54,339 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:16:54,442 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:16:54,793 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/sv-benchmarks/c/eca-rers2012/Problem14_label48.c[4040,4053] [2021-11-23 17:16:55,083 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:16:55,093 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:16:55,115 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/sv-benchmarks/c/eca-rers2012/Problem14_label48.c[4040,4053] [2021-11-23 17:16:55,251 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:16:55,270 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:16:55,271 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:16:55 WrapperNode [2021-11-23 17:16:55,271 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:16:55,273 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:16:55,273 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:16:55,273 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:16:55,280 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:16:55" (1/1) ... [2021-11-23 17:16:55,306 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:16:55" (1/1) ... [2021-11-23 17:16:55,415 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 858 [2021-11-23 17:16:55,416 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:16:55,417 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:16:55,417 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:16:55,417 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:16:55,427 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:16:55" (1/1) ... [2021-11-23 17:16:55,427 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:16:55" (1/1) ... [2021-11-23 17:16:55,435 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:16:55" (1/1) ... [2021-11-23 17:16:55,436 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:16:55" (1/1) ... [2021-11-23 17:16:55,522 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:16:55" (1/1) ... [2021-11-23 17:16:55,548 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:16:55" (1/1) ... [2021-11-23 17:16:55,579 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:16:55" (1/1) ... [2021-11-23 17:16:55,621 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:16:55,623 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:16:55,623 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:16:55,623 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:16:55,625 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:16:55" (1/1) ... [2021-11-23 17:16:55,646 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:16:55,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:16:55,682 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:16:55,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:16:55,748 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:16:55,748 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 17:16:55,749 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:16:55,749 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:16:55,834 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:16:55,836 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:16:57,334 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:16:57,406 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder has thrown an exception: java.lang.UnsupportedOperationException: Set is immutable at de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaBuilder.addBranchEncoders(TransFormulaBuilder.java:170) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.parallelComposition(TransFormulaUtils.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.ParallelComposition.(ParallelComposition.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CodeBlockFactory.constructParallelComposition(CodeBlockFactory.java:109) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.composeParallel(CfgBuilder.java:1792) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.(CfgBuilder.java:1653) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder.createIcfg(CfgBuilder.java:280) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.RCFGBuilderObserver.process(RCFGBuilderObserver.java:88) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.DFSTreeWalker.runObserver(DFSTreeWalker.java:65) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.runObserver(BaseWalker.java:93) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.run(BaseWalker.java:86) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-23 17:16:57,419 INFO L158 Benchmark]: Toolchain (without parser) took 3098.46ms. Allocated memory was 94.4MB in the beginning and 113.2MB in the end (delta: 18.9MB). Free memory was 57.7MB in the beginning and 45.3MB in the end (delta: 12.4MB). Peak memory consumption was 37.9MB. Max. memory is 16.1GB. [2021-11-23 17:16:57,421 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 94.4MB. Free memory was 63.4MB in the beginning and 63.3MB in the end (delta: 32.2kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:16:57,422 INFO L158 Benchmark]: CACSL2BoogieTranslator took 949.20ms. Allocated memory is still 94.4MB. Free memory was 57.6MB in the beginning and 49.1MB in the end (delta: 8.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-23 17:16:57,424 INFO L158 Benchmark]: Boogie Procedure Inliner took 143.62ms. Allocated memory is still 94.4MB. Free memory was 49.1MB in the beginning and 39.6MB in the end (delta: 9.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-23 17:16:57,425 INFO L158 Benchmark]: Boogie Preprocessor took 204.61ms. Allocated memory was 94.4MB in the beginning and 113.2MB in the end (delta: 18.9MB). Free memory was 39.6MB in the beginning and 83.7MB in the end (delta: -44.1MB). Peak memory consumption was 10.9MB. Max. memory is 16.1GB. [2021-11-23 17:16:57,426 INFO L158 Benchmark]: RCFGBuilder took 1792.90ms. Allocated memory is still 113.2MB. Free memory was 83.7MB in the beginning and 45.3MB in the end (delta: 38.3MB). Peak memory consumption was 43.8MB. Max. memory is 16.1GB. [2021-11-23 17:16:57,437 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 94.4MB. Free memory was 63.4MB in the beginning and 63.3MB in the end (delta: 32.2kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 949.20ms. Allocated memory is still 94.4MB. Free memory was 57.6MB in the beginning and 49.1MB in the end (delta: 8.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 143.62ms. Allocated memory is still 94.4MB. Free memory was 49.1MB in the beginning and 39.6MB in the end (delta: 9.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 204.61ms. Allocated memory was 94.4MB in the beginning and 113.2MB in the end (delta: 18.9MB). Free memory was 39.6MB in the beginning and 83.7MB in the end (delta: -44.1MB). Peak memory consumption was 10.9MB. Max. memory is 16.1GB. * RCFGBuilder took 1792.90ms. Allocated memory is still 113.2MB. Free memory was 83.7MB in the beginning and 45.3MB in the end (delta: 38.3MB). Peak memory consumption was 43.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: - ExceptionOrErrorResult: UnsupportedOperationException: Set is immutable de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: UnsupportedOperationException: Set is immutable: de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-23 17:16:57,466 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/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_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem14_label48.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8261a53c19f43c038d6c9bf7efdae8a565c27af3d0b11334f16494326c28bf76 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:17:00,082 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:17:00,084 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:17:00,122 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:17:00,123 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:17:00,127 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:17:00,129 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:17:00,138 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:17:00,141 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:17:00,150 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:17:00,151 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:17:00,154 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:17:00,154 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:17:00,157 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:17:00,160 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:17:00,165 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:17:00,167 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:17:00,169 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:17:00,171 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:17:00,179 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:17:00,181 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:17:00,183 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:17:00,185 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:17:00,188 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:17:00,197 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:17:00,198 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:17:00,198 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:17:00,200 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:17:00,201 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:17:00,203 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:17:00,204 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:17:00,205 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:17:00,207 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:17:00,209 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:17:00,210 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:17:00,211 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:17:00,221 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:17:00,221 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:17:00,222 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:17:00,224 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:17:00,225 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:17:00,230 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 17:17:00,280 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:17:00,282 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:17:00,283 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:17:00,283 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:17:00,284 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:17:00,284 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:17:00,284 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:17:00,285 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:17:00,285 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:17:00,285 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:17:00,286 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:17:00,287 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:17:00,288 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:17:00,289 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:17:00,289 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:17:00,289 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:17:00,289 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:17:00,290 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:17:00,290 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:17:00,290 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 17:17:00,290 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 17:17:00,291 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 17:17:00,291 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:17:00,291 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:17:00,291 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:17:00,292 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:17:00,292 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:17:00,292 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 17:17:00,292 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:17:00,293 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:17:00,293 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:17:00,293 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:17:00,294 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:17:00,294 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 17:17:00,294 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 17:17:00,295 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:17:00,295 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:17:00,295 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:17:00,296 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_eb304892-f04e-4fcc-909f-caed848a8ff7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8261a53c19f43c038d6c9bf7efdae8a565c27af3d0b11334f16494326c28bf76 [2021-11-23 17:17:00,721 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:17:00,739 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:17:00,742 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:17:00,743 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:17:00,744 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:17:00,746 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/eca-rers2012/Problem14_label48.c [2021-11-23 17:17:00,818 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/data/dae7cb7e4/d5ef8ce004c046858722f64053f297f3/FLAG01bfd2fdd [2021-11-23 17:17:01,433 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:17:01,435 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/sv-benchmarks/c/eca-rers2012/Problem14_label48.c [2021-11-23 17:17:01,451 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/data/dae7cb7e4/d5ef8ce004c046858722f64053f297f3/FLAG01bfd2fdd [2021-11-23 17:17:01,677 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/data/dae7cb7e4/d5ef8ce004c046858722f64053f297f3 [2021-11-23 17:17:01,681 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:17:01,684 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:17:01,687 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:17:01,688 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:17:01,691 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:17:01,693 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:17:01" (1/1) ... [2021-11-23 17:17:01,695 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c7c9177 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:17:01, skipping insertion in model container [2021-11-23 17:17:01,695 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:17:01" (1/1) ... [2021-11-23 17:17:01,703 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:17:01,779 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:17:02,057 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/sv-benchmarks/c/eca-rers2012/Problem14_label48.c[4040,4053] [2021-11-23 17:17:02,385 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:17:02,397 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:17:02,439 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/sv-benchmarks/c/eca-rers2012/Problem14_label48.c[4040,4053] [2021-11-23 17:17:02,631 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:17:02,648 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:17:02,649 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:17:02 WrapperNode [2021-11-23 17:17:02,649 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:17:02,651 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:17:02,651 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:17:02,651 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:17:02,659 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:17:02" (1/1) ... [2021-11-23 17:17:02,698 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:17:02" (1/1) ... [2021-11-23 17:17:02,775 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 856 [2021-11-23 17:17:02,775 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:17:02,776 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:17:02,776 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:17:02,776 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:17:02,785 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:17:02" (1/1) ... [2021-11-23 17:17:02,786 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:17:02" (1/1) ... [2021-11-23 17:17:02,793 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:17:02" (1/1) ... [2021-11-23 17:17:02,793 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:17:02" (1/1) ... [2021-11-23 17:17:02,858 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:17:02" (1/1) ... [2021-11-23 17:17:02,892 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:17:02" (1/1) ... [2021-11-23 17:17:02,901 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:17:02" (1/1) ... [2021-11-23 17:17:02,926 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:17:02,930 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:17:02,931 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:17:02,931 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:17:02,935 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:17:02" (1/1) ... [2021-11-23 17:17:02,943 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:17:02,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:17:02,967 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:17:02,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:17:03,027 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:17:03,028 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 17:17:03,028 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:17:03,028 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:17:03,119 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:17:03,121 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:17:06,660 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:17:06,678 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 17:17:06,678 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 17:17:06,681 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:17:06 BoogieIcfgContainer [2021-11-23 17:17:06,681 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 17:17:06,684 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 17:17:06,685 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 17:17:06,688 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 17:17:06,688 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 05:17:01" (1/3) ... [2021-11-23 17:17:06,689 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7181071b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:17:06, skipping insertion in model container [2021-11-23 17:17:06,690 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:17:02" (2/3) ... [2021-11-23 17:17:06,690 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7181071b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:17:06, skipping insertion in model container [2021-11-23 17:17:06,690 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:17:06" (3/3) ... [2021-11-23 17:17:06,692 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem14_label48.c [2021-11-23 17:17:06,701 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 17:17:06,701 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 17:17:06,776 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 17:17:06,786 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 17:17:06,786 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 17:17:06,813 INFO L276 IsEmpty]: Start isEmpty. Operand has 245 states, 243 states have (on average 1.7366255144032923) internal successors, (422), 244 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:17:06,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-23 17:17:06,824 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:17:06,825 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:17:06,826 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:17:06,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:17:06,833 INFO L85 PathProgramCache]: Analyzing trace with hash 323974986, now seen corresponding path program 1 times [2021-11-23 17:17:06,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:17:06,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [497460931] [2021-11-23 17:17:06,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:17:06,851 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:17:06,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:17:06,856 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:17:06,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 17:17:06,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:17:06,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:17:06,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:17:07,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:17:07,184 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:17:07,185 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:17:07,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [497460931] [2021-11-23 17:17:07,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [497460931] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:17:07,186 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:17:07,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:17:07,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17751747] [2021-11-23 17:17:07,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:17:07,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:17:07,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:17:07,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:17:07,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:17:07,239 INFO L87 Difference]: Start difference. First operand has 245 states, 243 states have (on average 1.7366255144032923) internal successors, (422), 244 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 2 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:17:10,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:17:10,805 INFO L93 Difference]: Finished difference Result 669 states and 1200 transitions. [2021-11-23 17:17:10,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:17:10,807 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 2 states have internal predecessors, (38), 0 states have call successors, (0), 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 17:17:10,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:17:10,822 INFO L225 Difference]: With dead ends: 669 [2021-11-23 17:17:10,822 INFO L226 Difference]: Without dead ends: 360 [2021-11-23 17:17:10,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:17:10,830 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 157 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-11-23 17:17:10,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 131 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2021-11-23 17:17:10,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-11-23 17:17:10,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 360. [2021-11-23 17:17:10,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 359 states have (on average 1.4874651810584958) internal successors, (534), 359 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:17:10,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 534 transitions. [2021-11-23 17:17:10,899 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 534 transitions. Word has length 38 [2021-11-23 17:17:10,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:17:10,899 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 534 transitions. [2021-11-23 17:17:10,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 2 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:17:10,900 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 534 transitions. [2021-11-23 17:17:10,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-23 17:17:10,905 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:17:10,905 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:17:10,918 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 17:17:11,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:17:11,119 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:17:11,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:17:11,120 INFO L85 PathProgramCache]: Analyzing trace with hash -679683616, now seen corresponding path program 1 times [2021-11-23 17:17:11,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:17:11,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [975732922] [2021-11-23 17:17:11,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:17:11,122 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:17:11,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:17:11,132 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:17:11,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 17:17:11,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:17:11,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:17:11,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:17:11,576 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:17:11,576 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:17:11,577 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:17:11,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [975732922] [2021-11-23 17:17:11,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [975732922] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:17:11,577 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:17:11,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:17:11,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031445737] [2021-11-23 17:17:11,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:17:11,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:17:11,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:17:11,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:17:11,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:17:11,581 INFO L87 Difference]: Start difference. First operand 360 states and 534 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 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 17:17:14,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:17:14,978 INFO L93 Difference]: Finished difference Result 1074 states and 1597 transitions. [2021-11-23 17:17:14,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:17:14,978 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 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 103 [2021-11-23 17:17:14,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:17:14,984 INFO L225 Difference]: With dead ends: 1074 [2021-11-23 17:17:14,985 INFO L226 Difference]: Without dead ends: 716 [2021-11-23 17:17:14,987 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:17:14,988 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 115 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-11-23 17:17:14,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 102 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 532 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2021-11-23 17:17:14,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2021-11-23 17:17:15,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 716. [2021-11-23 17:17:15,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 1.3454545454545455) internal successors, (962), 715 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:17:15,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 962 transitions. [2021-11-23 17:17:15,084 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 962 transitions. Word has length 103 [2021-11-23 17:17:15,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:17:15,090 INFO L470 AbstractCegarLoop]: Abstraction has 716 states and 962 transitions. [2021-11-23 17:17:15,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 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 17:17:15,090 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 962 transitions. [2021-11-23 17:17:15,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-23 17:17:15,094 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:17:15,095 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:17:15,110 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 17:17:15,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:17:15,305 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:17:15,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:17:15,306 INFO L85 PathProgramCache]: Analyzing trace with hash -562951020, now seen corresponding path program 1 times [2021-11-23 17:17:15,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:17:15,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1457065133] [2021-11-23 17:17:15,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:17:15,308 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:17:15,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:17:15,309 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:17:15,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 17:17:15,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:17:15,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:17:15,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:17:15,697 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:17:15,697 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:17:15,697 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:17:15,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1457065133] [2021-11-23 17:17:15,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1457065133] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:17:15,698 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:17:15,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:17:15,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817496742] [2021-11-23 17:17:15,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:17:15,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:17:15,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:17:15,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:17:15,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:17:15,700 INFO L87 Difference]: Start difference. First operand 716 states and 962 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 2 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:17:18,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:17:18,653 INFO L93 Difference]: Finished difference Result 1964 states and 2655 transitions. [2021-11-23 17:17:18,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:17:18,661 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 2 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-11-23 17:17:18,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:17:18,669 INFO L225 Difference]: With dead ends: 1964 [2021-11-23 17:17:18,670 INFO L226 Difference]: Without dead ends: 1250 [2021-11-23 17:17:18,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:17:18,672 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 129 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-11-23 17:17:18,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 89 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-11-23 17:17:18,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1250 states. [2021-11-23 17:17:18,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1250 to 1250. [2021-11-23 17:17:18,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1250 states, 1249 states have (on average 1.245796637309848) internal successors, (1556), 1249 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:17:18,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1250 states to 1250 states and 1556 transitions. [2021-11-23 17:17:18,717 INFO L78 Accepts]: Start accepts. Automaton has 1250 states and 1556 transitions. Word has length 106 [2021-11-23 17:17:18,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:17:18,717 INFO L470 AbstractCegarLoop]: Abstraction has 1250 states and 1556 transitions. [2021-11-23 17:17:18,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 2 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:17:18,718 INFO L276 IsEmpty]: Start isEmpty. Operand 1250 states and 1556 transitions. [2021-11-23 17:17:18,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-11-23 17:17:18,736 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:17:18,737 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:17:18,749 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-23 17:17:18,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:17:18,945 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:17:18,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:17:18,946 INFO L85 PathProgramCache]: Analyzing trace with hash -697356182, now seen corresponding path program 1 times [2021-11-23 17:17:18,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:17:18,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1278002680] [2021-11-23 17:17:18,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:17:18,963 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:17:18,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:17:18,964 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:17:18,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-23 17:17:19,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:17:19,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:17:19,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:17:20,057 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 28 proven. 104 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 17:17:20,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:17:20,922 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 28 proven. 104 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 17:17:20,922 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:17:20,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1278002680] [2021-11-23 17:17:20,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1278002680] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:17:20,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1660113694] [2021-11-23 17:17:20,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:17:20,923 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:17:20,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:17:20,934 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:17:20,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2021-11-23 17:17:21,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:17:21,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:17:21,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:17:21,790 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 103 proven. 29 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 17:17:21,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:17:22,373 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 103 proven. 29 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 17:17:22,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1660113694] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:17:22,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778938224] [2021-11-23 17:17:22,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:17:22,382 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:17:22,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:17:22,386 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:17:22,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 17:17:22,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:17:22,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:17:22,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:17:23,356 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 132 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 17:17:23,356 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:17:23,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778938224] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:17:23,356 INFO L186 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2021-11-23 17:17:23,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4, 4, 4] total 9 [2021-11-23 17:17:23,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425113781] [2021-11-23 17:17:23,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:17:23,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:17:23,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:17:23,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:17:23,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:17:23,359 INFO L87 Difference]: Start difference. First operand 1250 states and 1556 transitions. Second operand has 4 states, 4 states have (on average 45.25) internal successors, (181), 3 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:17:29,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:17:29,052 INFO L93 Difference]: Finished difference Result 2378 states and 3063 transitions. [2021-11-23 17:17:29,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:17:29,052 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 45.25) internal successors, (181), 3 states have internal predecessors, (181), 0 states have call successors, (0), 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 187 [2021-11-23 17:17:29,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:17:29,059 INFO L225 Difference]: With dead ends: 2378 [2021-11-23 17:17:29,059 INFO L226 Difference]: Without dead ends: 1250 [2021-11-23 17:17:29,061 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 930 GetRequests, 923 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:17:29,062 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 211 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 725 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2021-11-23 17:17:29,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 16 Invalid, 955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 725 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2021-11-23 17:17:29,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1250 states. [2021-11-23 17:17:29,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1250 to 1072. [2021-11-23 17:17:29,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1072 states, 1071 states have (on average 1.0999066293183941) internal successors, (1178), 1071 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:17:29,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1072 states to 1072 states and 1178 transitions. [2021-11-23 17:17:29,092 INFO L78 Accepts]: Start accepts. Automaton has 1072 states and 1178 transitions. Word has length 187 [2021-11-23 17:17:29,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:17:29,093 INFO L470 AbstractCegarLoop]: Abstraction has 1072 states and 1178 transitions. [2021-11-23 17:17:29,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.25) internal successors, (181), 3 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:17:29,093 INFO L276 IsEmpty]: Start isEmpty. Operand 1072 states and 1178 transitions. [2021-11-23 17:17:29,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2021-11-23 17:17:29,096 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:17:29,097 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:17:29,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-23 17:17:29,330 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 17:17:29,513 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2021-11-23 17:17:29,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:17:29,710 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:17:29,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:17:29,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1641047083, now seen corresponding path program 1 times [2021-11-23 17:17:29,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:17:29,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [335208022] [2021-11-23 17:17:29,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:17:29,713 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:17:29,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:17:29,714 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:17:29,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-23 17:17:29,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:17:29,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:17:29,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:17:31,003 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-23 17:17:31,003 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:17:31,003 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:17:31,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [335208022] [2021-11-23 17:17:31,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [335208022] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:17:31,004 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:17:31,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:17:31,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393283844] [2021-11-23 17:17:31,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:17:31,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:17:31,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:17:31,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:17:31,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:17:31,006 INFO L87 Difference]: Start difference. First operand 1072 states and 1178 transitions. Second operand has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 2 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:17:32,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:17:32,573 INFO L93 Difference]: Finished difference Result 1786 states and 1991 transitions. [2021-11-23 17:17:32,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:17:32,573 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 2 states have internal predecessors, (146), 0 states have call successors, (0), 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 213 [2021-11-23 17:17:32,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:17:32,580 INFO L225 Difference]: With dead ends: 1786 [2021-11-23 17:17:32,580 INFO L226 Difference]: Without dead ends: 1072 [2021-11-23 17:17:32,581 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:17:32,582 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 73 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-23 17:17:32,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 67 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 411 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-23 17:17:32,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072 states. [2021-11-23 17:17:32,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072 to 1072. [2021-11-23 17:17:32,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1072 states, 1071 states have (on average 1.096171802054155) internal successors, (1174), 1071 states have internal predecessors, (1174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:17:32,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1072 states to 1072 states and 1174 transitions. [2021-11-23 17:17:32,611 INFO L78 Accepts]: Start accepts. Automaton has 1072 states and 1174 transitions. Word has length 213 [2021-11-23 17:17:32,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:17:32,612 INFO L470 AbstractCegarLoop]: Abstraction has 1072 states and 1174 transitions. [2021-11-23 17:17:32,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 2 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:17:32,612 INFO L276 IsEmpty]: Start isEmpty. Operand 1072 states and 1174 transitions. [2021-11-23 17:17:32,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-11-23 17:17:32,621 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:17:32,622 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-23 17:17:32,637 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-23 17:17:32,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:17:32,837 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:17:32,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:17:32,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1718395196, now seen corresponding path program 1 times [2021-11-23 17:17:32,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:17:32,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2047475542] [2021-11-23 17:17:32,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:17:32,841 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:17:32,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:17:32,846 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:17:32,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-23 17:17:33,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:17:33,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:17:33,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:17:34,296 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 313 proven. 210 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2021-11-23 17:17:34,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:17:35,673 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 523 proven. 0 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2021-11-23 17:17:35,674 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:17:35,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2047475542] [2021-11-23 17:17:35,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2047475542] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 17:17:35,674 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 17:17:35,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-23 17:17:35,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749315945] [2021-11-23 17:17:35,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:17:35,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:17:35,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:17:35,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:17:35,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:17:35,676 INFO L87 Difference]: Start difference. First operand 1072 states and 1174 transitions. Second operand has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:17:40,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:17:40,765 INFO L93 Difference]: Finished difference Result 2320 states and 2617 transitions. [2021-11-23 17:17:40,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:17:40,766 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 0 states have call successors, (0), 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 424 [2021-11-23 17:17:40,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:17:40,773 INFO L225 Difference]: With dead ends: 2320 [2021-11-23 17:17:40,773 INFO L226 Difference]: Without dead ends: 1606 [2021-11-23 17:17:40,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 846 GetRequests, 843 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:17:40,776 INFO L933 BasicCegarLoop]: 226 mSDtfsCounter, 76 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:17:40,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 230 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2021-11-23 17:17:40,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1606 states. [2021-11-23 17:17:40,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1606 to 1606. [2021-11-23 17:17:40,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1606 states, 1605 states have (on average 1.1190031152647975) internal successors, (1796), 1605 states have internal predecessors, (1796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:17:40,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1606 states to 1606 states and 1796 transitions. [2021-11-23 17:17:40,818 INFO L78 Accepts]: Start accepts. Automaton has 1606 states and 1796 transitions. Word has length 424 [2021-11-23 17:17:40,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:17:40,819 INFO L470 AbstractCegarLoop]: Abstraction has 1606 states and 1796 transitions. [2021-11-23 17:17:40,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:17:40,820 INFO L276 IsEmpty]: Start isEmpty. Operand 1606 states and 1796 transitions. [2021-11-23 17:17:40,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 432 [2021-11-23 17:17:40,829 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:17:40,830 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:17:40,844 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-11-23 17:17:41,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:17:41,044 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:17:41,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:17:41,045 INFO L85 PathProgramCache]: Analyzing trace with hash -637848513, now seen corresponding path program 1 times [2021-11-23 17:17:41,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:17:41,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [509132633] [2021-11-23 17:17:41,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:17:41,050 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:17:41,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:17:41,051 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:17:41,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-23 17:17:41,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:17:41,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:17:41,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:17:43,191 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 143 proven. 347 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2021-11-23 17:17:43,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:17:46,613 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 490 proven. 0 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2021-11-23 17:17:46,613 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:17:46,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [509132633] [2021-11-23 17:17:46,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [509132633] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 17:17:46,613 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 17:17:46,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-23 17:17:46,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311969860] [2021-11-23 17:17:46,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:17:46,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:17:46,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:17:46,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:17:46,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:17:46,616 INFO L87 Difference]: Start difference. First operand 1606 states and 1796 transitions. Second operand has 3 states, 3 states have (on average 86.66666666666667) internal successors, (260), 3 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:17:50,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:17:50,630 INFO L93 Difference]: Finished difference Result 3210 states and 3663 transitions. [2021-11-23 17:17:50,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:17:50,631 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 86.66666666666667) internal successors, (260), 3 states have internal predecessors, (260), 0 states have call successors, (0), 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 431 [2021-11-23 17:17:50,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:17:50,642 INFO L225 Difference]: With dead ends: 3210 [2021-11-23 17:17:50,642 INFO L226 Difference]: Without dead ends: 1962 [2021-11-23 17:17:50,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 860 GetRequests, 857 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:17:50,646 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 77 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:17:50,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 20 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2021-11-23 17:17:50,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1962 states. [2021-11-23 17:17:50,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1962 to 1962. [2021-11-23 17:17:50,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1962 states, 1961 states have (on average 1.1147373788883224) internal successors, (2186), 1961 states have internal predecessors, (2186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:17:50,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1962 states to 1962 states and 2186 transitions. [2021-11-23 17:17:50,694 INFO L78 Accepts]: Start accepts. Automaton has 1962 states and 2186 transitions. Word has length 431 [2021-11-23 17:17:50,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:17:50,695 INFO L470 AbstractCegarLoop]: Abstraction has 1962 states and 2186 transitions. [2021-11-23 17:17:50,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.66666666666667) internal successors, (260), 3 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:17:50,696 INFO L276 IsEmpty]: Start isEmpty. Operand 1962 states and 2186 transitions. [2021-11-23 17:17:50,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2021-11-23 17:17:50,700 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:17:50,700 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:17:50,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-23 17:17:50,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:17:50,914 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:17:50,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:17:50,915 INFO L85 PathProgramCache]: Analyzing trace with hash 655566790, now seen corresponding path program 1 times [2021-11-23 17:17:50,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:17:50,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2068781633] [2021-11-23 17:17:50,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:17:50,917 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:17:50,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:17:50,923 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:17:50,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-23 17:17:51,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:17:51,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 17:17:51,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:17:58,917 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 143 proven. 416 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-11-23 17:17:58,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:18:20,367 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 490 proven. 69 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-11-23 17:18:20,367 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:18:20,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2068781633] [2021-11-23 17:18:20,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2068781633] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:18:20,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2107872028] [2021-11-23 17:18:20,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:18:20,368 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:18:20,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:18:20,369 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:18:20,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-23 17:18:20,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:18:20,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 17:18:20,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:18:21,600 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 143 proven. 0 refuted. 0 times theorem prover too weak. 520 trivial. 0 not checked. [2021-11-23 17:18:21,601 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:18:21,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2107872028] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:18:21,601 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 17:18:21,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 10] total 20 [2021-11-23 17:18:21,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583920897] [2021-11-23 17:18:21,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:18:21,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:18:21,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:18:21,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:18:21,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2021-11-23 17:18:21,604 INFO L87 Difference]: Start difference. First operand 1962 states and 2186 transitions. Second operand has 4 states, 4 states have (on average 50.0) internal successors, (200), 4 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:23,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:18:23,992 INFO L93 Difference]: Finished difference Result 3970 states and 4509 transitions. [2021-11-23 17:18:23,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:18:23,992 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 50.0) internal successors, (200), 4 states have internal predecessors, (200), 0 states have call successors, (0), 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 476 [2021-11-23 17:18:23,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:18:24,004 INFO L225 Difference]: With dead ends: 3970 [2021-11-23 17:18:24,005 INFO L226 Difference]: Without dead ends: 2366 [2021-11-23 17:18:24,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1425 GetRequests, 1407 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2021-11-23 17:18:24,008 INFO L933 BasicCegarLoop]: 240 mSDtfsCounter, 321 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:18:24,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [321 Valid, 248 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-11-23 17:18:24,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2366 states. [2021-11-23 17:18:24,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2366 to 2140. [2021-11-23 17:18:24,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2140 states, 2139 states have (on average 1.1079943899018232) internal successors, (2370), 2139 states have internal predecessors, (2370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:24,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2140 states to 2140 states and 2370 transitions. [2021-11-23 17:18:24,058 INFO L78 Accepts]: Start accepts. Automaton has 2140 states and 2370 transitions. Word has length 476 [2021-11-23 17:18:24,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:18:24,059 INFO L470 AbstractCegarLoop]: Abstraction has 2140 states and 2370 transitions. [2021-11-23 17:18:24,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 50.0) internal successors, (200), 4 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:24,060 INFO L276 IsEmpty]: Start isEmpty. Operand 2140 states and 2370 transitions. [2021-11-23 17:18:24,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 556 [2021-11-23 17:18:24,065 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:18:24,065 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:18:24,086 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-23 17:18:24,283 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-11-23 17:18:24,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:18:24,483 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:18:24,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:18:24,483 INFO L85 PathProgramCache]: Analyzing trace with hash 354438529, now seen corresponding path program 1 times [2021-11-23 17:18:24,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:18:24,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1927635580] [2021-11-23 17:18:24,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:18:24,485 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:18:24,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:18:24,486 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:18:24,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-23 17:18:24,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:18:24,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 625 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 17:18:24,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:18:32,294 INFO L134 CoverageAnalysis]: Checked inductivity of 1004 backedges. 448 proven. 416 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2021-11-23 17:18:32,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:18:53,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1004 backedges. 795 proven. 69 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2021-11-23 17:18:53,386 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:18:53,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1927635580] [2021-11-23 17:18:53,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1927635580] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:18:53,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [702897242] [2021-11-23 17:18:53,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:18:53,387 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:18:53,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:18:53,389 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:18:53,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-23 17:18:53,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:18:53,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 625 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:18:53,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:18:55,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1004 backedges. 484 proven. 0 refuted. 0 times theorem prover too weak. 520 trivial. 0 not checked. [2021-11-23 17:18:55,055 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:18:55,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [702897242] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:18:55,056 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 17:18:55,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10, 10] total 22 [2021-11-23 17:18:55,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804243712] [2021-11-23 17:18:55,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:18:55,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 17:18:55,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:18:55,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 17:18:55,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2021-11-23 17:18:55,058 INFO L87 Difference]: Start difference. First operand 2140 states and 2370 transitions. Second operand has 6 states, 6 states have (on average 46.5) internal successors, (279), 6 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:57,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:18:57,476 INFO L93 Difference]: Finished difference Result 3972 states and 4429 transitions. [2021-11-23 17:18:57,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 17:18:57,477 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 46.5) internal successors, (279), 6 states have internal predecessors, (279), 0 states have call successors, (0), 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 555 [2021-11-23 17:18:57,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:18:57,485 INFO L225 Difference]: With dead ends: 3972 [2021-11-23 17:18:57,485 INFO L226 Difference]: Without dead ends: 2140 [2021-11-23 17:18:57,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1662 GetRequests, 1642 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2021-11-23 17:18:57,492 INFO L933 BasicCegarLoop]: 243 mSDtfsCounter, 26 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 1061 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 1069 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1061 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-23 17:18:57,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 272 Invalid, 1069 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1061 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-11-23 17:18:57,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2140 states. [2021-11-23 17:18:57,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2140 to 2140. [2021-11-23 17:18:57,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2140 states, 2139 states have (on average 1.099111734455353) internal successors, (2351), 2139 states have internal predecessors, (2351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:57,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2140 states to 2140 states and 2351 transitions. [2021-11-23 17:18:57,540 INFO L78 Accepts]: Start accepts. Automaton has 2140 states and 2351 transitions. Word has length 555 [2021-11-23 17:18:57,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:18:57,541 INFO L470 AbstractCegarLoop]: Abstraction has 2140 states and 2351 transitions. [2021-11-23 17:18:57,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 46.5) internal successors, (279), 6 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:57,542 INFO L276 IsEmpty]: Start isEmpty. Operand 2140 states and 2351 transitions. [2021-11-23 17:18:57,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 583 [2021-11-23 17:18:57,547 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:18:57,547 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:18:57,572 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-23 17:18:57,772 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (14)] Ended with exit code 0 [2021-11-23 17:18:57,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:18:57,971 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:18:57,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:18:57,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1283480061, now seen corresponding path program 1 times [2021-11-23 17:18:57,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:18:57,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [253120373] [2021-11-23 17:18:57,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:18:57,974 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:18:57,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:18:57,975 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:18:57,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-23 17:18:58,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:18:58,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 646 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 17:18:58,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:19:03,189 INFO L134 CoverageAnalysis]: Checked inductivity of 825 backedges. 470 proven. 210 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-11-23 17:19:03,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:19:26,184 INFO L134 CoverageAnalysis]: Checked inductivity of 825 backedges. 680 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-11-23 17:19:26,185 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:19:26,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [253120373] [2021-11-23 17:19:26,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [253120373] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 17:19:26,185 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 17:19:26,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 17 [2021-11-23 17:19:26,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507484729] [2021-11-23 17:19:26,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:19:26,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 17:19:26,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:19:26,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 17:19:26,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-11-23 17:19:26,188 INFO L87 Difference]: Start difference. First operand 2140 states and 2351 transitions. Second operand has 9 states, 9 states have (on average 48.888888888888886) internal successors, (440), 9 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:30,169 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:19:32,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:19:32,002 INFO L93 Difference]: Finished difference Result 3897 states and 4314 transitions. [2021-11-23 17:19:32,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 17:19:32,002 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 48.888888888888886) internal successors, (440), 9 states have internal predecessors, (440), 0 states have call successors, (0), 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 582 [2021-11-23 17:19:32,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:19:32,011 INFO L225 Difference]: With dead ends: 3897 [2021-11-23 17:19:32,012 INFO L226 Difference]: Without dead ends: 2075 [2021-11-23 17:19:32,014 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1162 GetRequests, 1147 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-11-23 17:19:32,015 INFO L933 BasicCegarLoop]: 233 mSDtfsCounter, 215 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 981 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 981 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2021-11-23 17:19:32,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 248 Invalid, 984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 981 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2021-11-23 17:19:32,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2075 states. [2021-11-23 17:19:32,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2075 to 2075. [2021-11-23 17:19:32,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2075 states, 2074 states have (on average 1.100771456123433) internal successors, (2283), 2074 states have internal predecessors, (2283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:32,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2075 states to 2075 states and 2283 transitions. [2021-11-23 17:19:32,062 INFO L78 Accepts]: Start accepts. Automaton has 2075 states and 2283 transitions. Word has length 582 [2021-11-23 17:19:32,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:19:32,063 INFO L470 AbstractCegarLoop]: Abstraction has 2075 states and 2283 transitions. [2021-11-23 17:19:32,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 48.888888888888886) internal successors, (440), 9 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:32,063 INFO L276 IsEmpty]: Start isEmpty. Operand 2075 states and 2283 transitions. [2021-11-23 17:19:32,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 610 [2021-11-23 17:19:32,088 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:19:32,088 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:19:32,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-23 17:19:32,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:19:32,302 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:19:32,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:19:32,302 INFO L85 PathProgramCache]: Analyzing trace with hash -460294602, now seen corresponding path program 1 times [2021-11-23 17:19:32,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:19:32,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [33245551] [2021-11-23 17:19:32,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:19:32,305 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:19:32,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:19:32,305 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:19:32,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-23 17:19:32,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:19:32,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 684 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:19:32,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:19:33,695 INFO L134 CoverageAnalysis]: Checked inductivity of 1103 backedges. 538 proven. 353 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2021-11-23 17:19:33,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:19:35,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1103 backedges. 891 proven. 0 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2021-11-23 17:19:35,234 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:19:35,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [33245551] [2021-11-23 17:19:35,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [33245551] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 17:19:35,235 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 17:19:35,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-23 17:19:35,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493186618] [2021-11-23 17:19:35,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:19:35,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:19:35,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:19:35,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:19:35,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:19:35,238 INFO L87 Difference]: Start difference. First operand 2075 states and 2283 transitions. Second operand has 3 states, 3 states have (on average 133.33333333333334) internal successors, (400), 3 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:38,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:19:38,971 INFO L93 Difference]: Finished difference Result 4504 states and 5066 transitions. [2021-11-23 17:19:38,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:19:38,972 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 133.33333333333334) internal successors, (400), 3 states have internal predecessors, (400), 0 states have call successors, (0), 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 609 [2021-11-23 17:19:38,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:19:38,981 INFO L225 Difference]: With dead ends: 4504 [2021-11-23 17:19:38,982 INFO L226 Difference]: Without dead ends: 2787 [2021-11-23 17:19:38,984 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1216 GetRequests, 1213 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 17:19:38,985 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 70 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2021-11-23 17:19:38,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 53 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2021-11-23 17:19:38,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2787 states. [2021-11-23 17:19:39,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2787 to 2787. [2021-11-23 17:19:39,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2787 states, 2786 states have (on average 1.096913137114142) internal successors, (3056), 2786 states have internal predecessors, (3056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:39,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2787 states to 2787 states and 3056 transitions. [2021-11-23 17:19:39,044 INFO L78 Accepts]: Start accepts. Automaton has 2787 states and 3056 transitions. Word has length 609 [2021-11-23 17:19:39,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:19:39,045 INFO L470 AbstractCegarLoop]: Abstraction has 2787 states and 3056 transitions. [2021-11-23 17:19:39,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 133.33333333333334) internal successors, (400), 3 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:39,045 INFO L276 IsEmpty]: Start isEmpty. Operand 2787 states and 3056 transitions. [2021-11-23 17:19:39,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 765 [2021-11-23 17:19:39,052 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:19:39,053 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:19:39,069 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-23 17:19:39,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:19:39,266 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:19:39,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:19:39,267 INFO L85 PathProgramCache]: Analyzing trace with hash 762718895, now seen corresponding path program 1 times [2021-11-23 17:19:39,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:19:39,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1056476516] [2021-11-23 17:19:39,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:19:39,269 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:19:39,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:19:39,271 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:19:39,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-23 17:19:39,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:19:39,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 849 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:19:39,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:19:40,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1689 backedges. 1016 proven. 0 refuted. 0 times theorem prover too weak. 673 trivial. 0 not checked. [2021-11-23 17:19:40,538 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:19:40,539 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:19:40,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1056476516] [2021-11-23 17:19:40,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1056476516] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:19:40,539 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:19:40,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:19:40,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681150464] [2021-11-23 17:19:40,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:19:40,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:19:40,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:19:40,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:19:40,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:19:40,541 INFO L87 Difference]: Start difference. First operand 2787 states and 3056 transitions. Second operand has 3 states, 3 states have (on average 136.33333333333334) internal successors, (409), 3 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:42,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:19:42,670 INFO L93 Difference]: Finished difference Result 6106 states and 6767 transitions. [2021-11-23 17:19:42,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:19:42,677 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 136.33333333333334) internal successors, (409), 3 states have internal predecessors, (409), 0 states have call successors, (0), 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 764 [2021-11-23 17:19:42,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:19:42,690 INFO L225 Difference]: With dead ends: 6106 [2021-11-23 17:19:42,691 INFO L226 Difference]: Without dead ends: 3677 [2021-11-23 17:19:42,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 763 GetRequests, 762 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:19:42,693 INFO L933 BasicCegarLoop]: 218 mSDtfsCounter, 107 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:19:42,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 223 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 411 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-23 17:19:42,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3677 states. [2021-11-23 17:19:42,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3677 to 3677. [2021-11-23 17:19:42,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3677 states, 3676 states have (on average 1.0750816104461371) internal successors, (3952), 3676 states have internal predecessors, (3952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:42,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3677 states to 3677 states and 3952 transitions. [2021-11-23 17:19:42,769 INFO L78 Accepts]: Start accepts. Automaton has 3677 states and 3952 transitions. Word has length 764 [2021-11-23 17:19:42,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:19:42,770 INFO L470 AbstractCegarLoop]: Abstraction has 3677 states and 3952 transitions. [2021-11-23 17:19:42,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 136.33333333333334) internal successors, (409), 3 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:19:42,771 INFO L276 IsEmpty]: Start isEmpty. Operand 3677 states and 3952 transitions. [2021-11-23 17:19:42,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 858 [2021-11-23 17:19:42,780 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:19:42,780 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:19:42,805 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-23 17:19:43,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:19:43,002 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:19:43,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:19:43,002 INFO L85 PathProgramCache]: Analyzing trace with hash 104828821, now seen corresponding path program 1 times [2021-11-23 17:19:43,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:19:43,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2118442021] [2021-11-23 17:19:43,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:19:43,006 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:19:43,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:19:43,007 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:19:43,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-23 17:19:43,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:19:43,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 948 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 17:19:43,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:19:49,520 INFO L134 CoverageAnalysis]: Checked inductivity of 2189 backedges. 1329 proven. 420 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2021-11-23 17:19:49,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:20:11,142 INFO L134 CoverageAnalysis]: Checked inductivity of 2189 backedges. 1749 proven. 0 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2021-11-23 17:20:11,143 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:20:11,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2118442021] [2021-11-23 17:20:11,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2118442021] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 17:20:11,143 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 17:20:11,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10] total 19 [2021-11-23 17:20:11,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481419555] [2021-11-23 17:20:11,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:20:11,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 17:20:11,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:20:11,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 17:20:11,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2021-11-23 17:20:11,146 INFO L87 Difference]: Start difference. First operand 3677 states and 3952 transitions. Second operand has 10 states, 10 states have (on average 56.6) internal successors, (566), 10 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:20:15,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:20:15,052 INFO L93 Difference]: Finished difference Result 7160 states and 7710 transitions. [2021-11-23 17:20:15,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 17:20:15,053 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 56.6) internal successors, (566), 10 states have internal predecessors, (566), 0 states have call successors, (0), 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 857 [2021-11-23 17:20:15,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:20:15,069 INFO L225 Difference]: With dead ends: 7160 [2021-11-23 17:20:15,069 INFO L226 Difference]: Without dead ends: 3832 [2021-11-23 17:20:15,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1712 GetRequests, 1695 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2021-11-23 17:20:15,073 INFO L933 BasicCegarLoop]: 233 mSDtfsCounter, 335 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 1103 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 1122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2021-11-23 17:20:15,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [335 Valid, 247 Invalid, 1122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1103 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2021-11-23 17:20:15,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3832 states. [2021-11-23 17:20:15,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3832 to 3832. [2021-11-23 17:20:15,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3832 states, 3831 states have (on average 1.0707387105194466) internal successors, (4102), 3831 states have internal predecessors, (4102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:20:15,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3832 states to 3832 states and 4102 transitions. [2021-11-23 17:20:15,155 INFO L78 Accepts]: Start accepts. Automaton has 3832 states and 4102 transitions. Word has length 857 [2021-11-23 17:20:15,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:20:15,157 INFO L470 AbstractCegarLoop]: Abstraction has 3832 states and 4102 transitions. [2021-11-23 17:20:15,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 56.6) internal successors, (566), 10 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:20:15,158 INFO L276 IsEmpty]: Start isEmpty. Operand 3832 states and 4102 transitions. [2021-11-23 17:20:15,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 935 [2021-11-23 17:20:15,168 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:20:15,169 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:20:15,186 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-23 17:20:15,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:20:15,382 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:20:15,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:20:15,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1704151531, now seen corresponding path program 1 times [2021-11-23 17:20:15,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:20:15,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [106328302] [2021-11-23 17:20:15,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:20:15,388 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:20:15,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:20:15,389 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:20:15,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-23 17:20:15,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:20:15,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 1034 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:20:15,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:20:18,201 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 287 proven. 2098 refuted. 0 times theorem prover too weak. 371 trivial. 0 not checked. [2021-11-23 17:20:18,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:20:22,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 1737 proven. 75 refuted. 0 times theorem prover too weak. 944 trivial. 0 not checked. [2021-11-23 17:20:22,592 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:20:22,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [106328302] [2021-11-23 17:20:22,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [106328302] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:20:22,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1223639802] [2021-11-23 17:20:22,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:20:22,593 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:20:22,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:20:22,594 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:20:22,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-23 17:20:22,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:20:22,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 1034 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:20:22,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:20:24,780 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 793 proven. 15 refuted. 0 times theorem prover too weak. 1948 trivial. 0 not checked. [2021-11-23 17:20:24,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:20:26,385 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 793 proven. 15 refuted. 0 times theorem prover too weak. 1948 trivial. 0 not checked. [2021-11-23 17:20:26,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1223639802] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:20:26,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086787884] [2021-11-23 17:20:26,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:20:26,385 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:20:26,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:20:26,387 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:20:26,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-23 17:20:26,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:20:26,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 1034 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:20:26,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:20:29,182 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 125 proven. 683 refuted. 0 times theorem prover too weak. 1948 trivial. 0 not checked. [2021-11-23 17:20:29,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:20:31,856 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 125 proven. 683 refuted. 0 times theorem prover too weak. 1948 trivial. 0 not checked. [2021-11-23 17:20:31,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086787884] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:20:31,857 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:20:31,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5, 5] total 17 [2021-11-23 17:20:31,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700982137] [2021-11-23 17:20:31,859 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:20:31,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-23 17:20:31,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:20:31,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-23 17:20:31,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-11-23 17:20:31,867 INFO L87 Difference]: Start difference. First operand 3832 states and 4102 transitions. Second operand has 17 states, 17 states have (on average 91.41176470588235) internal successors, (1554), 17 states have internal predecessors, (1554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:20:44,582 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:21:06,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:21:06,667 INFO L93 Difference]: Finished difference Result 10259 states and 11118 transitions. [2021-11-23 17:21:06,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-23 17:21:06,668 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 91.41176470588235) internal successors, (1554), 17 states have internal predecessors, (1554), 0 states have call successors, (0), 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 934 [2021-11-23 17:21:06,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:21:06,699 INFO L225 Difference]: With dead ends: 10259 [2021-11-23 17:21:06,699 INFO L226 Difference]: Without dead ends: 6785 [2021-11-23 17:21:06,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5630 GetRequests, 5599 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=285, Invalid=771, Unknown=0, NotChecked=0, Total=1056 [2021-11-23 17:21:06,703 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 5846 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 8186 mSolverCounterSat, 781 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5846 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 8967 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 781 IncrementalHoareTripleChecker+Valid, 8186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 34.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:21:06,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5846 Valid, 149 Invalid, 8967 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [781 Valid, 8186 Invalid, 0 Unknown, 0 Unchecked, 34.1s Time] [2021-11-23 17:21:06,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6785 states. [2021-11-23 17:21:06,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6785 to 6514. [2021-11-23 17:21:06,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6514 states, 6513 states have (on average 1.0647934899431906) internal successors, (6935), 6513 states have internal predecessors, (6935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:21:06,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6514 states to 6514 states and 6935 transitions. [2021-11-23 17:21:06,800 INFO L78 Accepts]: Start accepts. Automaton has 6514 states and 6935 transitions. Word has length 934 [2021-11-23 17:21:06,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:21:06,802 INFO L470 AbstractCegarLoop]: Abstraction has 6514 states and 6935 transitions. [2021-11-23 17:21:06,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 91.41176470588235) internal successors, (1554), 17 states have internal predecessors, (1554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:21:06,802 INFO L276 IsEmpty]: Start isEmpty. Operand 6514 states and 6935 transitions. [2021-11-23 17:21:06,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 959 [2021-11-23 17:21:06,814 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:21:06,815 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:21:06,856 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-23 17:21:07,043 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (20)] Ended with exit code 0 [2021-11-23 17:21:07,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-23 17:21:07,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:21:07,442 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:21:07,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:21:07,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1159822111, now seen corresponding path program 1 times [2021-11-23 17:21:07,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:21:07,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [304437628] [2021-11-23 17:21:07,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:21:07,446 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:21:07,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:21:07,448 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:21:07,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-23 17:21:07,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:21:07,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 1054 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-23 17:21:07,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:21:16,866 INFO L134 CoverageAnalysis]: Checked inductivity of 2594 backedges. 113 proven. 2341 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2021-11-23 17:21:16,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:22:27,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2594 backedges. 1217 proven. 1237 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2021-11-23 17:22:27,394 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:22:27,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [304437628] [2021-11-23 17:22:27,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [304437628] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:22:27,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [681959140] [2021-11-23 17:22:27,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:22:27,394 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:22:27,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:22:27,396 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:22:27,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-23 17:22:27,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:22:27,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 1054 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 17:22:27,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:22:33,418 INFO L134 CoverageAnalysis]: Checked inductivity of 2594 backedges. 1655 proven. 266 refuted. 0 times theorem prover too weak. 673 trivial. 0 not checked. [2021-11-23 17:22:33,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:22:45,387 INFO L134 CoverageAnalysis]: Checked inductivity of 2594 backedges. 1583 proven. 338 refuted. 0 times theorem prover too weak. 673 trivial. 0 not checked. [2021-11-23 17:22:45,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [681959140] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:22:45,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219803211] [2021-11-23 17:22:45,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:22:45,388 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:22:45,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:22:45,389 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:22:45,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-23 17:22:45,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:22:45,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 1054 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:22:45,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:22:48,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2594 backedges. 62 proven. 189 refuted. 0 times theorem prover too weak. 2343 trivial. 0 not checked. [2021-11-23 17:22:48,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:22:51,972 INFO L134 CoverageAnalysis]: Checked inductivity of 2594 backedges. 62 proven. 189 refuted. 0 times theorem prover too weak. 2343 trivial. 0 not checked. [2021-11-23 17:22:51,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219803211] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:22:51,973 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:22:51,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 9, 10, 4, 4] total 37 [2021-11-23 17:22:51,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543019151] [2021-11-23 17:22:51,975 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:22:51,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-23 17:22:51,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:22:51,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-23 17:22:51,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=1041, Unknown=0, NotChecked=0, Total=1332 [2021-11-23 17:22:51,981 INFO L87 Difference]: Start difference. First operand 6514 states and 6935 transitions. Second operand has 37 states, 37 states have (on average 61.86486486486486) internal successors, (2289), 37 states have internal predecessors, (2289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:23:42,979 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:23:44,826 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:24:38,990 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:24:55,298 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:25:09,330 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:25:11,400 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:25:17,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:25:17,552 INFO L93 Difference]: Finished difference Result 14983 states and 16041 transitions. [2021-11-23 17:25:17,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-23 17:25:17,556 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 61.86486486486486) internal successors, (2289), 37 states have internal predecessors, (2289), 0 states have call successors, (0), 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 958 [2021-11-23 17:25:17,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:25:17,575 INFO L225 Difference]: With dead ends: 14983 [2021-11-23 17:25:17,575 INFO L226 Difference]: Without dead ends: 7897 [2021-11-23 17:25:17,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5811 GetRequests, 5734 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1783 ImplicationChecksByTransitivity, 57.2s TimeCoverageRelationStatistics Valid=1109, Invalid=5053, Unknown=0, NotChecked=0, Total=6162 [2021-11-23 17:25:17,584 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 4741 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 11137 mSolverCounterSat, 656 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 84.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4741 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 11794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 656 IncrementalHoareTripleChecker+Valid, 11137 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 93.8s IncrementalHoareTripleChecker+Time [2021-11-23 17:25:17,584 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4741 Valid, 205 Invalid, 11794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [656 Valid, 11137 Invalid, 1 Unknown, 0 Unchecked, 93.8s Time] [2021-11-23 17:25:17,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7897 states. [2021-11-23 17:25:17,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7897 to 5960. [2021-11-23 17:25:17,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5960 states, 5959 states have (on average 1.0422889746601778) internal successors, (6211), 5959 states have internal predecessors, (6211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:17,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5960 states to 5960 states and 6211 transitions. [2021-11-23 17:25:17,706 INFO L78 Accepts]: Start accepts. Automaton has 5960 states and 6211 transitions. Word has length 958 [2021-11-23 17:25:17,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:25:17,707 INFO L470 AbstractCegarLoop]: Abstraction has 5960 states and 6211 transitions. [2021-11-23 17:25:17,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 61.86486486486486) internal successors, (2289), 37 states have internal predecessors, (2289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:17,708 INFO L276 IsEmpty]: Start isEmpty. Operand 5960 states and 6211 transitions. [2021-11-23 17:25:17,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1151 [2021-11-23 17:25:17,725 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:25:17,727 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:25:17,736 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (23)] Ended with exit code 0 [2021-11-23 17:25:17,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-23 17:25:18,162 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-11-23 17:25:18,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:25:18,334 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:25:18,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:25:18,334 INFO L85 PathProgramCache]: Analyzing trace with hash 167745923, now seen corresponding path program 1 times [2021-11-23 17:25:18,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:25:18,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [808287167] [2021-11-23 17:25:18,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:18,339 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:25:18,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:25:18,340 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:25:18,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb304892-f04e-4fcc-909f-caed848a8ff7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-23 17:25:18,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:18,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 1260 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 17:25:18,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:30,400 INFO L134 CoverageAnalysis]: Checked inductivity of 3975 backedges. 1127 proven. 2492 refuted. 0 times theorem prover too weak. 356 trivial. 0 not checked. [2021-11-23 17:25:30,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:26:23,204 WARN L860 $PredicateComparison]: unable to prove that (bvslt (_ bv11 32) (bvadd (_ bv42 32) (bvsrem (bvadd (_ bv464909 32) (bvsdiv (bvsdiv (bvadd (_ bv4294967295 32) (bvsrem c_~a12~0 (_ bv26 32))) (_ bv5 32)) (_ bv5 32))) (_ bv34 32)))) is different from true