./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem15_label36.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_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/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_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem15_label36.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/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_4095fd23-994a-48dd-9dad-6af5514e7b76/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 f8c7f180e45ffba5eb47ee4dc238e0b48ee8dddec8c88fb0da95366e7d605cc2 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:03:11,858 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:03:11,861 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:03:11,916 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:03:11,917 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:03:11,921 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:03:11,923 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:03:11,927 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:03:11,930 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:03:11,936 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:03:11,937 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:03:11,939 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:03:11,939 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:03:11,942 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:03:11,944 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:03:11,948 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:03:11,950 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:03:11,952 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:03:11,957 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:03:11,965 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:03:11,967 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:03:11,968 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:03:11,972 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:03:11,973 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:03:11,982 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:03:11,982 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:03:11,983 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:03:11,985 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:03:11,986 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:03:11,987 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:03:11,988 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:03:11,989 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:03:11,991 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:03:11,993 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:03:11,994 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:03:11,995 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:03:11,996 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:03:11,996 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:03:11,996 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:03:11,997 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:03:11,998 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:03:12,000 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 17:03:12,045 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:03:12,045 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:03:12,046 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:03:12,046 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:03:12,047 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:03:12,048 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:03:12,048 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:03:12,048 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:03:12,048 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:03:12,049 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 17:03:12,050 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:03:12,050 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:03:12,050 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 17:03:12,051 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 17:03:12,051 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:03:12,051 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 17:03:12,051 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 17:03:12,052 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 17:03:12,053 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:03:12,053 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:03:12,053 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 17:03:12,054 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:03:12,054 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:03:12,054 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:03:12,054 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:03:12,055 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:03:12,056 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:03:12,056 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:03:12,057 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:03:12,057 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:03:12,057 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:03:12,057 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:03:12,058 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:03:12,058 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:03:12,058 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:03:12,059 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:03:12,059 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 17:03:12,059 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 17:03:12,059 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:03:12,059 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:03:12,060 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:03:12,060 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_4095fd23-994a-48dd-9dad-6af5514e7b76/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f8c7f180e45ffba5eb47ee4dc238e0b48ee8dddec8c88fb0da95366e7d605cc2 [2021-11-23 17:03:12,357 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:03:12,381 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:03:12,385 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:03:12,386 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:03:12,387 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:03:12,388 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/eca-rers2012/Problem15_label36.c [2021-11-23 17:03:12,454 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/data/dc0541e38/fbe55486f1fe432589440989c0930bca/FLAGd76f0ba4c [2021-11-23 17:03:13,073 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:03:13,075 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/sv-benchmarks/c/eca-rers2012/Problem15_label36.c [2021-11-23 17:03:13,108 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/data/dc0541e38/fbe55486f1fe432589440989c0930bca/FLAGd76f0ba4c [2021-11-23 17:03:13,250 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/data/dc0541e38/fbe55486f1fe432589440989c0930bca [2021-11-23 17:03:13,253 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:03:13,255 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:03:13,258 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:03:13,258 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:03:13,261 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:03:13,261 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:03:13" (1/1) ... [2021-11-23 17:03:13,262 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50ad0c73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:03:13, skipping insertion in model container [2021-11-23 17:03:13,262 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:03:13" (1/1) ... [2021-11-23 17:03:13,270 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:03:13,363 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:03:13,759 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_4095fd23-994a-48dd-9dad-6af5514e7b76/sv-benchmarks/c/eca-rers2012/Problem15_label36.c[7434,7447] [2021-11-23 17:03:14,192 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:03:14,201 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:03:14,244 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_4095fd23-994a-48dd-9dad-6af5514e7b76/sv-benchmarks/c/eca-rers2012/Problem15_label36.c[7434,7447] [2021-11-23 17:03:14,511 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:03:14,527 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:03:14,528 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:03:14 WrapperNode [2021-11-23 17:03:14,528 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:03:14,529 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:03:14,529 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:03:14,529 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:03:14,537 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:03:14" (1/1) ... [2021-11-23 17:03:14,569 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:03:14" (1/1) ... [2021-11-23 17:03:14,785 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 1758 [2021-11-23 17:03:14,786 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:03:14,787 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:03:14,787 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:03:14,788 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:03:14,797 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:03:14" (1/1) ... [2021-11-23 17:03:14,797 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:03:14" (1/1) ... [2021-11-23 17:03:14,819 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:03:14" (1/1) ... [2021-11-23 17:03:14,819 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:03:14" (1/1) ... [2021-11-23 17:03:14,927 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:03:14" (1/1) ... [2021-11-23 17:03:14,944 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:03:14" (1/1) ... [2021-11-23 17:03:14,957 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:03:14" (1/1) ... [2021-11-23 17:03:14,987 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:03:14,988 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:03:14,988 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:03:14,988 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:03:14,989 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:03:14" (1/1) ... [2021-11-23 17:03:14,997 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:03:15,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:03:15,021 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:03:15,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:03:15,071 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:03:15,071 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 17:03:15,071 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:03:15,071 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:03:15,137 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:03:15,139 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:03:18,452 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:03:18,519 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 17:03:18,529 INFO L158 Benchmark]: Toolchain (without parser) took 5272.20ms. Allocated memory was 98.6MB in the beginning and 249.6MB in the end (delta: 151.0MB). Free memory was 75.7MB in the beginning and 116.8MB in the end (delta: -41.2MB). Peak memory consumption was 115.4MB. Max. memory is 16.1GB. [2021-11-23 17:03:18,531 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 81.8MB. Free memory was 53.8MB in the beginning and 53.8MB in the end (delta: 30.2kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:03:18,532 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1270.66ms. Allocated memory is still 98.6MB. Free memory was 75.4MB in the beginning and 59.2MB in the end (delta: 16.1MB). Peak memory consumption was 45.0MB. Max. memory is 16.1GB. [2021-11-23 17:03:18,534 INFO L158 Benchmark]: Boogie Procedure Inliner took 257.29ms. Allocated memory was 98.6MB in the beginning and 125.8MB in the end (delta: 27.3MB). Free memory was 59.2MB in the beginning and 65.8MB in the end (delta: -6.6MB). Peak memory consumption was 37.7MB. Max. memory is 16.1GB. [2021-11-23 17:03:18,535 INFO L158 Benchmark]: Boogie Preprocessor took 200.16ms. Allocated memory is still 125.8MB. Free memory was 65.8MB in the beginning and 59.0MB in the end (delta: 6.8MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2021-11-23 17:03:18,536 INFO L158 Benchmark]: RCFGBuilder took 3538.16ms. Allocated memory was 125.8MB in the beginning and 249.6MB in the end (delta: 123.7MB). Free memory was 59.0MB in the beginning and 116.8MB in the end (delta: -57.8MB). Peak memory consumption was 70.5MB. Max. memory is 16.1GB. [2021-11-23 17:03:18,546 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25ms. Allocated memory is still 81.8MB. Free memory was 53.8MB in the beginning and 53.8MB in the end (delta: 30.2kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1270.66ms. Allocated memory is still 98.6MB. Free memory was 75.4MB in the beginning and 59.2MB in the end (delta: 16.1MB). Peak memory consumption was 45.0MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 257.29ms. Allocated memory was 98.6MB in the beginning and 125.8MB in the end (delta: 27.3MB). Free memory was 59.2MB in the beginning and 65.8MB in the end (delta: -6.6MB). Peak memory consumption was 37.7MB. Max. memory is 16.1GB. * Boogie Preprocessor took 200.16ms. Allocated memory is still 125.8MB. Free memory was 65.8MB in the beginning and 59.0MB in the end (delta: 6.8MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * RCFGBuilder took 3538.16ms. Allocated memory was 125.8MB in the beginning and 249.6MB in the end (delta: 123.7MB). Free memory was 59.0MB in the beginning and 116.8MB in the end (delta: -57.8MB). Peak memory consumption was 70.5MB. 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 17:03:18,576 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/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_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem15_label36.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/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_4095fd23-994a-48dd-9dad-6af5514e7b76/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 f8c7f180e45ffba5eb47ee4dc238e0b48ee8dddec8c88fb0da95366e7d605cc2 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:03:20,981 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:03:20,985 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:03:21,054 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:03:21,055 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:03:21,058 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:03:21,061 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:03:21,067 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:03:21,070 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:03:21,078 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:03:21,080 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:03:21,082 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:03:21,082 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:03:21,086 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:03:21,088 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:03:21,091 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:03:21,092 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:03:21,093 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:03:21,095 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:03:21,097 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:03:21,099 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:03:21,100 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:03:21,102 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:03:21,103 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:03:21,111 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:03:21,112 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:03:21,112 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:03:21,113 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:03:21,114 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:03:21,120 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:03:21,120 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:03:21,121 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:03:21,123 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:03:21,124 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:03:21,126 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:03:21,126 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:03:21,127 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:03:21,127 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:03:21,128 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:03:21,130 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:03:21,130 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:03:21,131 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 17:03:21,178 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:03:21,178 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:03:21,179 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:03:21,179 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:03:21,180 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:03:21,180 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:03:21,180 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:03:21,181 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:03:21,181 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:03:21,181 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:03:21,182 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:03:21,182 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:03:21,184 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:03:21,184 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:03:21,184 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:03:21,184 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:03:21,185 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:03:21,185 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:03:21,185 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:03:21,185 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 17:03:21,185 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 17:03:21,186 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 17:03:21,186 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:03:21,186 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:03:21,186 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:03:21,186 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:03:21,187 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:03:21,187 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 17:03:21,187 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:03:21,187 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:03:21,187 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:03:21,187 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:03:21,188 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:03:21,188 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 17:03:21,189 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 17:03:21,189 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:03:21,189 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:03:21,189 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:03:21,189 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_4095fd23-994a-48dd-9dad-6af5514e7b76/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f8c7f180e45ffba5eb47ee4dc238e0b48ee8dddec8c88fb0da95366e7d605cc2 [2021-11-23 17:03:21,628 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:03:21,659 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:03:21,662 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:03:21,664 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:03:21,665 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:03:21,666 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/eca-rers2012/Problem15_label36.c [2021-11-23 17:03:21,749 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/data/f7674d9cf/25bf931c68d34bdba4d9acb6f7fb5cfb/FLAGc63801afa [2021-11-23 17:03:22,505 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:03:22,506 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/sv-benchmarks/c/eca-rers2012/Problem15_label36.c [2021-11-23 17:03:22,530 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/data/f7674d9cf/25bf931c68d34bdba4d9acb6f7fb5cfb/FLAGc63801afa [2021-11-23 17:03:22,661 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/data/f7674d9cf/25bf931c68d34bdba4d9acb6f7fb5cfb [2021-11-23 17:03:22,663 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:03:22,665 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:03:22,666 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:03:22,666 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:03:22,670 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:03:22,672 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:03:22" (1/1) ... [2021-11-23 17:03:22,673 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3cba3845 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:03:22, skipping insertion in model container [2021-11-23 17:03:22,674 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:03:22" (1/1) ... [2021-11-23 17:03:22,691 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:03:22,792 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:03:23,149 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_4095fd23-994a-48dd-9dad-6af5514e7b76/sv-benchmarks/c/eca-rers2012/Problem15_label36.c[7434,7447] [2021-11-23 17:03:23,760 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:03:23,772 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:03:23,802 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_4095fd23-994a-48dd-9dad-6af5514e7b76/sv-benchmarks/c/eca-rers2012/Problem15_label36.c[7434,7447] [2021-11-23 17:03:24,068 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:03:24,095 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:03:24,096 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:03:24 WrapperNode [2021-11-23 17:03:24,096 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:03:24,097 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:03:24,097 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:03:24,098 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:03:24,104 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:03:24" (1/1) ... [2021-11-23 17:03:24,153 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:03:24" (1/1) ... [2021-11-23 17:03:24,249 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 1755 [2021-11-23 17:03:24,249 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:03:24,250 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:03:24,250 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:03:24,250 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:03:24,259 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:03:24" (1/1) ... [2021-11-23 17:03:24,259 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:03:24" (1/1) ... [2021-11-23 17:03:24,267 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:03:24" (1/1) ... [2021-11-23 17:03:24,268 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:03:24" (1/1) ... [2021-11-23 17:03:24,322 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:03:24" (1/1) ... [2021-11-23 17:03:24,358 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:03:24" (1/1) ... [2021-11-23 17:03:24,380 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:03:24" (1/1) ... [2021-11-23 17:03:24,433 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:03:24,436 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:03:24,437 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:03:24,438 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:03:24,442 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:03:24" (1/1) ... [2021-11-23 17:03:24,454 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:03:24,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:03:24,484 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:03:24,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:03:24,537 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:03:24,537 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 17:03:24,542 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:03:24,542 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:03:24,625 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:03:24,626 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:03:41,907 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:03:41,922 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 17:03:41,922 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 17:03:41,926 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:03:41 BoogieIcfgContainer [2021-11-23 17:03:41,926 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 17:03:41,928 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 17:03:41,928 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 17:03:41,931 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 17:03:41,931 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 05:03:22" (1/3) ... [2021-11-23 17:03:41,932 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15eec034 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:03:41, skipping insertion in model container [2021-11-23 17:03:41,932 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:03:24" (2/3) ... [2021-11-23 17:03:41,933 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15eec034 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:03:41, skipping insertion in model container [2021-11-23 17:03:41,933 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:03:41" (3/3) ... [2021-11-23 17:03:41,934 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem15_label36.c [2021-11-23 17:03:41,940 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 17:03:41,940 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 17:03:41,992 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 17:03:42,000 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 17:03:42,000 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 17:03:42,033 INFO L276 IsEmpty]: Start isEmpty. Operand has 424 states, 422 states have (on average 1.7772511848341233) internal successors, (750), 423 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:03:42,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-23 17:03:42,042 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:03:42,043 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:03:42,043 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:03:42,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:03:42,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1818267785, now seen corresponding path program 1 times [2021-11-23 17:03:42,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:03:42,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [741925817] [2021-11-23 17:03:42,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:03:42,063 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:03:42,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:03:42,072 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:03:42,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 17:03:42,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:03:42,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:03:42,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:42,634 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 17:03:42,635 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:03:42,635 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:03:42,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [741925817] [2021-11-23 17:03:42,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [741925817] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:03:42,636 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:03:42,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:03:42,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102808468] [2021-11-23 17:03:42,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:03:42,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:03:42,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:03:42,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:03:42,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:03:42,684 INFO L87 Difference]: Start difference. First operand has 424 states, 422 states have (on average 1.7772511848341233) internal successors, (750), 423 states have internal predecessors, (750), 0 states have call successors, (0), 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 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:04:03,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:04:03,094 INFO L93 Difference]: Finished difference Result 1153 states and 2105 transitions. [2021-11-23 17:04:03,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:04:03,096 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-23 17:04:03,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:04:03,113 INFO L225 Difference]: With dead ends: 1153 [2021-11-23 17:04:03,113 INFO L226 Difference]: Without dead ends: 664 [2021-11-23 17:04:03,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:04:03,122 INFO L933 BasicCegarLoop]: 334 mSDtfsCounter, 259 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 991 mSolverCounterSat, 239 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 1230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 239 IncrementalHoareTripleChecker+Valid, 991 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:04:03,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 383 Invalid, 1230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [239 Valid, 991 Invalid, 0 Unknown, 0 Unchecked, 20.3s Time] [2021-11-23 17:04:03,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2021-11-23 17:04:03,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 662. [2021-11-23 17:04:03,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 661 states have (on average 1.4826021180030258) internal successors, (980), 661 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:04:03,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 980 transitions. [2021-11-23 17:04:03,206 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 980 transitions. Word has length 61 [2021-11-23 17:04:03,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:04:03,206 INFO L470 AbstractCegarLoop]: Abstraction has 662 states and 980 transitions. [2021-11-23 17:04:03,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:04:03,207 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 980 transitions. [2021-11-23 17:04:03,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-23 17:04:03,218 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:04:03,219 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, 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] [2021-11-23 17:04:03,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 17:04:03,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:04:03,431 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:04:03,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:04:03,433 INFO L85 PathProgramCache]: Analyzing trace with hash 13242671, now seen corresponding path program 1 times [2021-11-23 17:04:03,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:04:03,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [888665123] [2021-11-23 17:04:03,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:04:03,436 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:04:03,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:04:03,438 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:04:03,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 17:04:03,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:04:03,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:04:03,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:04:04,031 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:04:04,031 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:04:04,032 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:04:04,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [888665123] [2021-11-23 17:04:04,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [888665123] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:04:04,032 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:04:04,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:04:04,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789214111] [2021-11-23 17:04:04,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:04:04,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:04:04,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:04:04,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:04:04,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:04:04,036 INFO L87 Difference]: Start difference. First operand 662 states and 980 transitions. Second operand has 3 states, 3 states have (on average 42.0) internal successors, (126), 2 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:04:23,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:04:23,638 INFO L93 Difference]: Finished difference Result 1927 states and 2854 transitions. [2021-11-23 17:04:23,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:04:23,639 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 2 states have internal predecessors, (126), 0 states have call successors, (0), 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 126 [2021-11-23 17:04:23,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:04:23,646 INFO L225 Difference]: With dead ends: 1927 [2021-11-23 17:04:23,647 INFO L226 Difference]: Without dead ends: 1267 [2021-11-23 17:04:23,648 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:04:23,650 INFO L933 BasicCegarLoop]: 279 mSDtfsCounter, 261 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 839 mSolverCounterSat, 285 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 1124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 285 IncrementalHoareTripleChecker+Valid, 839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.5s IncrementalHoareTripleChecker+Time [2021-11-23 17:04:23,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 318 Invalid, 1124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [285 Valid, 839 Invalid, 0 Unknown, 0 Unchecked, 19.5s Time] [2021-11-23 17:04:23,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2021-11-23 17:04:23,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 1265. [2021-11-23 17:04:23,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1265 states, 1264 states have (on average 1.3045886075949367) internal successors, (1649), 1264 states have internal predecessors, (1649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:04:23,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1265 states to 1265 states and 1649 transitions. [2021-11-23 17:04:23,700 INFO L78 Accepts]: Start accepts. Automaton has 1265 states and 1649 transitions. Word has length 126 [2021-11-23 17:04:23,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:04:23,700 INFO L470 AbstractCegarLoop]: Abstraction has 1265 states and 1649 transitions. [2021-11-23 17:04:23,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 2 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:04:23,701 INFO L276 IsEmpty]: Start isEmpty. Operand 1265 states and 1649 transitions. [2021-11-23 17:04:23,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2021-11-23 17:04:23,706 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:04:23,706 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:04:23,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 17:04:23,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:04:23,920 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:04:23,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:04:23,921 INFO L85 PathProgramCache]: Analyzing trace with hash -327362278, now seen corresponding path program 1 times [2021-11-23 17:04:23,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:04:23,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [290053806] [2021-11-23 17:04:23,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:04:23,924 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:04:23,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:04:23,925 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:04:23,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 17:04:24,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:04:24,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:04:24,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:04:26,998 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 133 proven. 32 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-23 17:04:26,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:04:29,653 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 133 proven. 32 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-23 17:04:29,654 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:04:29,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [290053806] [2021-11-23 17:04:29,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [290053806] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:04:29,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1475937791] [2021-11-23 17:04:29,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:04:29,655 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:04:29,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:04:29,661 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:04:29,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-11-23 17:04:29,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:04:29,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:04:29,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:04:32,108 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 183 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 17:04:32,108 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:04:32,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1475937791] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:04:32,109 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 17:04:32,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [3, 3] total 11 [2021-11-23 17:04:32,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625933151] [2021-11-23 17:04:32,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:04:32,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 17:04:32,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:04:32,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 17:04:32,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-11-23 17:04:32,112 INFO L87 Difference]: Start difference. First operand 1265 states and 1649 transitions. Second operand has 7 states, 7 states have (on average 31.428571428571427) internal successors, (220), 7 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:05:11,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:05:11,732 INFO L93 Difference]: Finished difference Result 2633 states and 3623 transitions. [2021-11-23 17:05:11,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 17:05:11,748 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 31.428571428571427) internal successors, (220), 7 states have internal predecessors, (220), 0 states have call successors, (0), 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 227 [2021-11-23 17:05:11,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:05:11,760 INFO L225 Difference]: With dead ends: 2633 [2021-11-23 17:05:11,760 INFO L226 Difference]: Without dead ends: 1970 [2021-11-23 17:05:11,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 678 GetRequests, 669 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-11-23 17:05:11,763 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 1206 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 1525 mSolverCounterSat, 680 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1206 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 2205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 680 IncrementalHoareTripleChecker+Valid, 1525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 39.5s IncrementalHoareTripleChecker+Time [2021-11-23 17:05:11,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1206 Valid, 115 Invalid, 2205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [680 Valid, 1525 Invalid, 0 Unknown, 0 Unchecked, 39.5s Time] [2021-11-23 17:05:11,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1970 states. [2021-11-23 17:05:11,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1970 to 1870. [2021-11-23 17:05:11,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1870 states, 1869 states have (on average 1.3242375601926164) internal successors, (2475), 1869 states have internal predecessors, (2475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:05:11,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1870 states to 1870 states and 2475 transitions. [2021-11-23 17:05:11,822 INFO L78 Accepts]: Start accepts. Automaton has 1870 states and 2475 transitions. Word has length 227 [2021-11-23 17:05:11,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:05:11,823 INFO L470 AbstractCegarLoop]: Abstraction has 1870 states and 2475 transitions. [2021-11-23 17:05:11,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 31.428571428571427) internal successors, (220), 7 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:05:11,824 INFO L276 IsEmpty]: Start isEmpty. Operand 1870 states and 2475 transitions. [2021-11-23 17:05:11,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2021-11-23 17:05:11,827 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:05:11,827 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:05:11,840 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-23 17:05:12,041 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2021-11-23 17:05:12,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:05:12,241 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:05:12,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:05:12,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1978174500, now seen corresponding path program 1 times [2021-11-23 17:05:12,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:05:12,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1036378032] [2021-11-23 17:05:12,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:05:12,243 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:05:12,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:05:12,245 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:05:12,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 17:05:12,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:05:12,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:05:12,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:05:14,760 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 137 proven. 32 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-23 17:05:14,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:05:16,871 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 137 proven. 32 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-23 17:05:16,872 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:05:16,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1036378032] [2021-11-23 17:05:16,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1036378032] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:05:16,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1114876422] [2021-11-23 17:05:16,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:05:16,873 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:05:16,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:05:16,891 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:05:16,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-23 17:05:17,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:05:17,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:05:17,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:05:17,489 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 195 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:05:17,489 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:05:17,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1114876422] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:05:17,489 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 17:05:17,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 7 [2021-11-23 17:05:17,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143395607] [2021-11-23 17:05:17,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:05:17,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:05:17,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:05:17,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:05:17,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:05:17,492 INFO L87 Difference]: Start difference. First operand 1870 states and 2475 transitions. Second operand has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:05:36,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:05:36,730 INFO L93 Difference]: Finished difference Result 3736 states and 5168 transitions. [2021-11-23 17:05:36,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:05:36,736 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 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 231 [2021-11-23 17:05:36,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:05:36,752 INFO L225 Difference]: With dead ends: 3736 [2021-11-23 17:05:36,753 INFO L226 Difference]: Without dead ends: 2468 [2021-11-23 17:05:36,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 690 GetRequests, 685 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:05:36,756 INFO L933 BasicCegarLoop]: 268 mSDtfsCounter, 269 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 744 mSolverCounterSat, 344 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 1088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 344 IncrementalHoareTripleChecker+Valid, 744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:05:36,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [269 Valid, 333 Invalid, 1088 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [344 Valid, 744 Invalid, 0 Unknown, 0 Unchecked, 19.2s Time] [2021-11-23 17:05:36,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2468 states. [2021-11-23 17:05:36,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2468 to 2468. [2021-11-23 17:05:36,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2468 states, 2467 states have (on average 1.272800972841508) internal successors, (3140), 2467 states have internal predecessors, (3140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:05:36,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2468 states to 2468 states and 3140 transitions. [2021-11-23 17:05:36,821 INFO L78 Accepts]: Start accepts. Automaton has 2468 states and 3140 transitions. Word has length 231 [2021-11-23 17:05:36,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:05:36,822 INFO L470 AbstractCegarLoop]: Abstraction has 2468 states and 3140 transitions. [2021-11-23 17:05:36,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:05:36,823 INFO L276 IsEmpty]: Start isEmpty. Operand 2468 states and 3140 transitions. [2021-11-23 17:05:36,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2021-11-23 17:05:36,830 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:05:36,831 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:05:36,836 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-11-23 17:05:37,041 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-23 17:05:37,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:05:37,233 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:05:37,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:05:37,234 INFO L85 PathProgramCache]: Analyzing trace with hash -985073555, now seen corresponding path program 1 times [2021-11-23 17:05:37,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:05:37,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1151697919] [2021-11-23 17:05:37,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:05:37,237 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:05:37,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:05:37,237 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:05:37,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-23 17:05:37,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:05:37,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:05:37,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:05:40,021 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 149 proven. 32 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-23 17:05:40,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:05:42,404 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 149 proven. 32 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-23 17:05:42,404 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:05:42,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1151697919] [2021-11-23 17:05:42,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1151697919] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:05:42,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [451602700] [2021-11-23 17:05:42,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:05:42,405 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:05:42,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:05:42,407 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:05:42,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-23 17:05:42,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:05:42,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 17:05:42,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:05:45,246 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 116 proven. 58 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-23 17:05:45,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:05:46,238 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 117 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-23 17:05:46,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [451602700] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 17:05:46,239 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-23 17:05:46,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3, 7] total 12 [2021-11-23 17:05:46,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101982744] [2021-11-23 17:05:46,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:05:46,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:05:46,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:05:46,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:05:46,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-11-23 17:05:46,242 INFO L87 Difference]: Start difference. First operand 2468 states and 3140 transitions. Second operand has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:05:54,979 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:05:58,943 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:06:04,217 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:06:27,096 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:06:31,758 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:06:31,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:06:31,759 INFO L93 Difference]: Finished difference Result 3976 states and 5171 transitions. [2021-11-23 17:06:31,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:06:31,772 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 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 348 [2021-11-23 17:06:31,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:06:31,797 INFO L225 Difference]: With dead ends: 3976 [2021-11-23 17:06:31,797 INFO L226 Difference]: Without dead ends: 3974 [2021-11-23 17:06:31,799 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1388 GetRequests, 1378 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-11-23 17:06:31,800 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 332 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 937 mSolverCounterSat, 358 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 41.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 1295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 358 IncrementalHoareTripleChecker+Valid, 937 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 45.5s IncrementalHoareTripleChecker+Time [2021-11-23 17:06:31,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [332 Valid, 83 Invalid, 1295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [358 Valid, 937 Invalid, 0 Unknown, 0 Unchecked, 45.5s Time] [2021-11-23 17:06:31,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3974 states. [2021-11-23 17:06:31,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3974 to 2466. [2021-11-23 17:06:31,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2466 states, 2465 states have (on average 1.3626774847870182) internal successors, (3359), 2465 states have internal predecessors, (3359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:06:31,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2466 states to 2466 states and 3359 transitions. [2021-11-23 17:06:31,891 INFO L78 Accepts]: Start accepts. Automaton has 2466 states and 3359 transitions. Word has length 348 [2021-11-23 17:06:31,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:06:31,892 INFO L470 AbstractCegarLoop]: Abstraction has 2466 states and 3359 transitions. [2021-11-23 17:06:31,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:06:31,893 INFO L276 IsEmpty]: Start isEmpty. Operand 2466 states and 3359 transitions. [2021-11-23 17:06:31,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2021-11-23 17:06:31,901 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:06:31,902 INFO L514 BasicCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:06:31,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-11-23 17:06:32,121 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-23 17:06:32,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:06:32,304 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:06:32,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:06:32,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1295190555, now seen corresponding path program 1 times [2021-11-23 17:06:32,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:06:32,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1691109678] [2021-11-23 17:06:32,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:06:32,307 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:06:32,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:06:32,308 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:06:32,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-23 17:06:32,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:06:32,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:06:32,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:06:34,577 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 199 proven. 0 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2021-11-23 17:06:34,577 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:06:34,577 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:06:34,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1691109678] [2021-11-23 17:06:34,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1691109678] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:06:34,578 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:06:34,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:06:34,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686424228] [2021-11-23 17:06:34,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:06:34,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:06:34,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:06:34,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:06:34,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:06:34,580 INFO L87 Difference]: Start difference. First operand 2466 states and 3359 transitions. Second operand has 3 states, 3 states have (on average 92.66666666666667) internal successors, (278), 2 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:06:51,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:06:51,784 INFO L93 Difference]: Finished difference Result 5229 states and 7027 transitions. [2021-11-23 17:06:51,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:06:51,804 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 92.66666666666667) internal successors, (278), 2 states have internal predecessors, (278), 0 states have call successors, (0), 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 402 [2021-11-23 17:06:51,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:06:51,821 INFO L225 Difference]: With dead ends: 5229 [2021-11-23 17:06:51,822 INFO L226 Difference]: Without dead ends: 2765 [2021-11-23 17:06:51,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 400 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 17:06:51,826 INFO L933 BasicCegarLoop]: 323 mSDtfsCounter, 105 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 887 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:06:51,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 358 Invalid, 892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 887 Invalid, 0 Unknown, 0 Unchecked, 17.2s Time] [2021-11-23 17:06:51,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2765 states. [2021-11-23 17:06:51,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2765 to 2765. [2021-11-23 17:06:51,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2765 states, 2764 states have (on average 1.32561505065123) internal successors, (3664), 2764 states have internal predecessors, (3664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:06:51,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2765 states to 2765 states and 3664 transitions. [2021-11-23 17:06:51,892 INFO L78 Accepts]: Start accepts. Automaton has 2765 states and 3664 transitions. Word has length 402 [2021-11-23 17:06:51,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:06:51,893 INFO L470 AbstractCegarLoop]: Abstraction has 2765 states and 3664 transitions. [2021-11-23 17:06:51,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 92.66666666666667) internal successors, (278), 2 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:06:51,893 INFO L276 IsEmpty]: Start isEmpty. Operand 2765 states and 3664 transitions. [2021-11-23 17:06:51,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2021-11-23 17:06:51,904 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:06:51,905 INFO L514 BasicCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:06:51,924 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-23 17:06:52,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:06:52,121 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:06:52,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:06:52,122 INFO L85 PathProgramCache]: Analyzing trace with hash -1842576009, now seen corresponding path program 1 times [2021-11-23 17:06:52,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:06:52,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2128660305] [2021-11-23 17:06:52,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:06:52,126 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:06:52,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:06:52,127 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:06:52,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-23 17:06:52,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:06:52,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:06:52,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:06:53,393 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 325 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-11-23 17:06:53,393 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:06:53,393 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:06:53,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2128660305] [2021-11-23 17:06:53,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2128660305] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:06:53,393 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:06:53,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:06:53,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930483901] [2021-11-23 17:06:53,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:06:53,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:06:53,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:06:53,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:06:53,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:06:53,395 INFO L87 Difference]: Start difference. First operand 2765 states and 3664 transitions. Second operand has 3 states, 3 states have (on average 139.33333333333334) internal successors, (418), 3 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:07:17,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:07:17,647 INFO L93 Difference]: Finished difference Result 6435 states and 8755 transitions. [2021-11-23 17:07:17,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:07:17,664 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 139.33333333333334) internal successors, (418), 3 states have internal predecessors, (418), 0 states have call successors, (0), 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 17:07:17,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:07:17,686 INFO L225 Difference]: With dead ends: 6435 [2021-11-23 17:07:17,686 INFO L226 Difference]: Without dead ends: 3971 [2021-11-23 17:07:17,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 474 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 17:07:17,691 INFO L933 BasicCegarLoop]: 623 mSDtfsCounter, 242 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 945 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 662 SdHoareTripleChecker+Invalid, 1163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:07:17,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 662 Invalid, 1163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 945 Invalid, 0 Unknown, 0 Unchecked, 24.2s Time] [2021-11-23 17:07:17,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3971 states. [2021-11-23 17:07:17,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3971 to 3669. [2021-11-23 17:07:17,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3669 states, 3668 states have (on average 1.2805343511450382) internal successors, (4697), 3668 states have internal predecessors, (4697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:07:17,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3669 states to 3669 states and 4697 transitions. [2021-11-23 17:07:17,794 INFO L78 Accepts]: Start accepts. Automaton has 3669 states and 4697 transitions. Word has length 476 [2021-11-23 17:07:17,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:07:17,795 INFO L470 AbstractCegarLoop]: Abstraction has 3669 states and 4697 transitions. [2021-11-23 17:07:17,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 139.33333333333334) internal successors, (418), 3 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:07:17,795 INFO L276 IsEmpty]: Start isEmpty. Operand 3669 states and 4697 transitions. [2021-11-23 17:07:17,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2021-11-23 17:07:17,806 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:07:17,807 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:07:17,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-23 17:07:18,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:07:18,020 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:07:18,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:07:18,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1397553072, now seen corresponding path program 1 times [2021-11-23 17:07:18,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:07:18,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [263257977] [2021-11-23 17:07:18,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:07:18,024 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:07:18,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:07:18,024 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:07:18,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-23 17:07:18,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:07:18,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 562 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:07:18,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:07:20,859 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 356 proven. 32 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2021-11-23 17:07:20,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:07:23,213 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 356 proven. 32 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2021-11-23 17:07:23,213 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:07:23,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [263257977] [2021-11-23 17:07:23,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [263257977] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:07:23,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1111693658] [2021-11-23 17:07:23,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:07:23,214 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:07:23,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:07:23,215 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:07:23,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-23 17:07:23,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:07:23,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 562 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 17:07:23,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:07:25,935 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 235 proven. 0 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2021-11-23 17:07:25,935 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:07:25,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1111693658] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:07:25,936 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 17:07:25,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [3, 3] total 9 [2021-11-23 17:07:25,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108237500] [2021-11-23 17:07:25,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:07:25,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 17:07:25,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:07:25,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 17:07:25,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:07:25,938 INFO L87 Difference]: Start difference. First operand 3669 states and 4697 transitions. Second operand has 5 states, 5 states have (on average 52.6) internal successors, (263), 5 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:07:39,513 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:08:01,445 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:08:02,701 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:08:02,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:08:02,798 INFO L93 Difference]: Finished difference Result 8338 states and 10914 transitions. [2021-11-23 17:08:02,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 17:08:02,817 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 52.6) internal successors, (263), 5 states have internal predecessors, (263), 0 states have call successors, (0), 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 493 [2021-11-23 17:08:02,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:08:02,837 INFO L225 Difference]: With dead ends: 8338 [2021-11-23 17:08:02,837 INFO L226 Difference]: Without dead ends: 4970 [2021-11-23 17:08:02,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1476 GetRequests, 1469 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:08:02,841 INFO L933 BasicCegarLoop]: 567 mSDtfsCounter, 634 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 1467 mSolverCounterSat, 305 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 634 SdHoareTripleChecker+Valid, 651 SdHoareTripleChecker+Invalid, 1772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 305 IncrementalHoareTripleChecker+Valid, 1467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36.8s IncrementalHoareTripleChecker+Time [2021-11-23 17:08:02,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [634 Valid, 651 Invalid, 1772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [305 Valid, 1467 Invalid, 0 Unknown, 0 Unchecked, 36.8s Time] [2021-11-23 17:08:02,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4970 states. [2021-11-23 17:08:02,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4970 to 4565. [2021-11-23 17:08:02,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4565 states, 4564 states have (on average 1.2486853637160387) internal successors, (5699), 4564 states have internal predecessors, (5699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:08:02,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4565 states to 4565 states and 5699 transitions. [2021-11-23 17:08:02,968 INFO L78 Accepts]: Start accepts. Automaton has 4565 states and 5699 transitions. Word has length 493 [2021-11-23 17:08:02,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:08:02,969 INFO L470 AbstractCegarLoop]: Abstraction has 4565 states and 5699 transitions. [2021-11-23 17:08:02,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 52.6) internal successors, (263), 5 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:08:02,970 INFO L276 IsEmpty]: Start isEmpty. Operand 4565 states and 5699 transitions. [2021-11-23 17:08:02,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 589 [2021-11-23 17:08:02,978 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:08:02,979 INFO L514 BasicCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:08:03,000 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-23 17:08:03,197 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-23 17:08:03,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:08:03,397 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:08:03,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:08:03,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1264853762, now seen corresponding path program 1 times [2021-11-23 17:08:03,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:08:03,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [342196044] [2021-11-23 17:08:03,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:08:03,401 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:08:03,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:08:03,402 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:08:03,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-23 17:08:03,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:08:03,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 649 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:08:03,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:08:05,927 INFO L134 CoverageAnalysis]: Checked inductivity of 538 backedges. 373 proven. 106 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-11-23 17:08:05,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:08:18,061 INFO L134 CoverageAnalysis]: Checked inductivity of 538 backedges. 373 proven. 106 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-11-23 17:08:18,062 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:08:18,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [342196044] [2021-11-23 17:08:18,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [342196044] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:08:18,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [996260297] [2021-11-23 17:08:18,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:08:18,063 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:08:18,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:08:18,088 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:08:18,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-23 17:08:18,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:08:18,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 649 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 17:08:18,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:08:20,552 INFO L134 CoverageAnalysis]: Checked inductivity of 538 backedges. 176 proven. 0 refuted. 0 times theorem prover too weak. 362 trivial. 0 not checked. [2021-11-23 17:08:20,553 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:08:20,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [996260297] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:08:20,553 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 17:08:20,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [3, 3] total 9 [2021-11-23 17:08:20,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614552001] [2021-11-23 17:08:20,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:08:20,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 17:08:20,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:08:20,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 17:08:20,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:08:20,556 INFO L87 Difference]: Start difference. First operand 4565 states and 5699 transitions. Second operand has 5 states, 5 states have (on average 66.8) internal successors, (334), 5 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:08:53,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:08:53,488 INFO L93 Difference]: Finished difference Result 10192 states and 12978 transitions. [2021-11-23 17:08:53,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 17:08:53,508 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 66.8) internal successors, (334), 5 states have internal predecessors, (334), 0 states have call successors, (0), 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 588 [2021-11-23 17:08:53,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:08:53,537 INFO L225 Difference]: With dead ends: 10192 [2021-11-23 17:08:53,537 INFO L226 Difference]: Without dead ends: 5928 [2021-11-23 17:08:53,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1761 GetRequests, 1754 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:08:53,542 INFO L933 BasicCegarLoop]: 617 mSDtfsCounter, 358 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 2147 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 734 SdHoareTripleChecker+Invalid, 2374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 2147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.8s IncrementalHoareTripleChecker+Time [2021-11-23 17:08:53,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [358 Valid, 734 Invalid, 2374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 2147 Invalid, 0 Unknown, 0 Unchecked, 32.8s Time] [2021-11-23 17:08:53,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5928 states. [2021-11-23 17:08:53,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5928 to 5466. [2021-11-23 17:08:53,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5466 states, 5465 states have (on average 1.2252516010978958) internal successors, (6696), 5465 states have internal predecessors, (6696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:08:53,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5466 states to 5466 states and 6696 transitions. [2021-11-23 17:08:53,651 INFO L78 Accepts]: Start accepts. Automaton has 5466 states and 6696 transitions. Word has length 588 [2021-11-23 17:08:53,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:08:53,653 INFO L470 AbstractCegarLoop]: Abstraction has 5466 states and 6696 transitions. [2021-11-23 17:08:53,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 66.8) internal successors, (334), 5 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:08:53,653 INFO L276 IsEmpty]: Start isEmpty. Operand 5466 states and 6696 transitions. [2021-11-23 17:08:53,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 658 [2021-11-23 17:08:53,692 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:08:53,693 INFO L514 BasicCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:08:53,699 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-23 17:08:53,906 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-23 17:08:54,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:08:54,096 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:08:54,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:08:54,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1143050440, now seen corresponding path program 1 times [2021-11-23 17:08:54,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:08:54,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1175490676] [2021-11-23 17:08:54,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:08:54,101 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:08:54,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:08:54,101 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:08:54,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-23 17:08:54,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:08:54,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 719 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:08:54,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:08:57,017 INFO L134 CoverageAnalysis]: Checked inductivity of 607 backedges. 442 proven. 106 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-11-23 17:08:57,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:09:09,141 INFO L134 CoverageAnalysis]: Checked inductivity of 607 backedges. 442 proven. 106 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-11-23 17:09:09,142 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:09:09,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1175490676] [2021-11-23 17:09:09,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1175490676] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:09:09,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1820103083] [2021-11-23 17:09:09,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:09:09,143 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:09:09,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:09:09,144 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:09:09,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-23 17:09:10,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:09:10,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 719 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:09:10,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:09:12,523 INFO L134 CoverageAnalysis]: Checked inductivity of 607 backedges. 442 proven. 106 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-11-23 17:09:12,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:09:24,639 INFO L134 CoverageAnalysis]: Checked inductivity of 607 backedges. 442 proven. 106 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-11-23 17:09:24,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1820103083] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:09:24,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941192062] [2021-11-23 17:09:24,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:09:24,640 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:09:24,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:09:24,641 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:09:24,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-23 17:09:24,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:09:24,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 719 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:09:24,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:09:27,295 INFO L134 CoverageAnalysis]: Checked inductivity of 607 backedges. 176 proven. 325 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-11-23 17:09:27,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:09:29,611 INFO L134 CoverageAnalysis]: Checked inductivity of 607 backedges. 501 proven. 0 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-11-23 17:09:29,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941192062] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 17:09:29,612 INFO L186 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2021-11-23 17:09:29,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3, 3, 3, 3] total 9 [2021-11-23 17:09:29,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301694446] [2021-11-23 17:09:29,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:09:29,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:09:29,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:09:29,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:09:29,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:09:29,633 INFO L87 Difference]: Start difference. First operand 5466 states and 6696 transitions. Second operand has 3 states, 3 states have (on average 184.0) internal successors, (552), 3 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:09:44,947 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 17:09:55,797 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:10:00,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:10:00,825 INFO L93 Difference]: Finished difference Result 13919 states and 16884 transitions. [2021-11-23 17:10:00,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:10:00,842 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 184.0) internal successors, (552), 3 states have internal predecessors, (552), 0 states have call successors, (0), 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 657 [2021-11-23 17:10:00,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:10:00,860 INFO L225 Difference]: With dead ends: 13919 [2021-11-23 17:10:00,861 INFO L226 Difference]: Without dead ends: 8754 [2021-11-23 17:10:00,866 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3936 GetRequests, 3929 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:10:00,867 INFO L933 BasicCegarLoop]: 140 mSDtfsCounter, 158 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 871 mSolverCounterSat, 324 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 1196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 324 IncrementalHoareTripleChecker+Valid, 871 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:10:00,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 170 Invalid, 1196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [324 Valid, 871 Invalid, 1 Unknown, 0 Unchecked, 31.1s Time] [2021-11-23 17:10:00,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8754 states. [2021-11-23 17:10:01,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8754 to 6960. [2021-11-23 17:10:01,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6960 states, 6959 states have (on average 1.1998850409541602) internal successors, (8350), 6959 states have internal predecessors, (8350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:10:01,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6960 states to 6960 states and 8350 transitions. [2021-11-23 17:10:01,067 INFO L78 Accepts]: Start accepts. Automaton has 6960 states and 8350 transitions. Word has length 657 [2021-11-23 17:10:01,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:10:01,068 INFO L470 AbstractCegarLoop]: Abstraction has 6960 states and 8350 transitions. [2021-11-23 17:10:01,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 184.0) internal successors, (552), 3 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:10:01,068 INFO L276 IsEmpty]: Start isEmpty. Operand 6960 states and 8350 transitions. [2021-11-23 17:10:01,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 726 [2021-11-23 17:10:01,113 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:10:01,114 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, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:10:01,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-23 17:10:01,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-23 17:10:01,527 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-23 17:10:01,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:10:01,724 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:10:01,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:10:01,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1557810584, now seen corresponding path program 1 times [2021-11-23 17:10:01,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:10:01,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [948330675] [2021-11-23 17:10:01,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:10:01,729 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:10:01,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:10:01,730 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:10:01,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-23 17:10:02,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:10:02,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 793 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:10:02,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:10:05,052 INFO L134 CoverageAnalysis]: Checked inductivity of 941 backedges. 395 proven. 32 refuted. 0 times theorem prover too weak. 514 trivial. 0 not checked. [2021-11-23 17:10:05,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:10:07,887 INFO L134 CoverageAnalysis]: Checked inductivity of 941 backedges. 395 proven. 32 refuted. 0 times theorem prover too weak. 514 trivial. 0 not checked. [2021-11-23 17:10:07,887 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:10:07,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [948330675] [2021-11-23 17:10:07,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [948330675] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:10:07,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [258804220] [2021-11-23 17:10:07,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:10:07,888 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:10:07,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:10:07,889 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:10:07,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-23 17:10:08,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:10:08,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 793 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:10:08,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:10:13,687 INFO L134 CoverageAnalysis]: Checked inductivity of 941 backedges. 641 proven. 0 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2021-11-23 17:10:13,687 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:10:13,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [258804220] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:10:13,687 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 17:10:13,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 3] total 8 [2021-11-23 17:10:13,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321497441] [2021-11-23 17:10:13,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:10:13,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:10:13,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:10:13,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:10:13,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:10:13,690 INFO L87 Difference]: Start difference. First operand 6960 states and 8350 transitions. Second operand has 4 states, 4 states have (on average 129.25) internal successors, (517), 4 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:10:49,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:10:49,108 INFO L93 Difference]: Finished difference Result 18484 states and 22200 transitions. [2021-11-23 17:10:49,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 17:10:49,109 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 129.25) internal successors, (517), 4 states have internal predecessors, (517), 0 states have call successors, (0), 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 725 [2021-11-23 17:10:49,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:10:49,129 INFO L225 Difference]: With dead ends: 18484 [2021-11-23 17:10:49,129 INFO L226 Difference]: Without dead ends: 11825 [2021-11-23 17:10:49,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2174 GetRequests, 2167 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:10:49,136 INFO L933 BasicCegarLoop]: 536 mSDtfsCounter, 341 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 1430 mSolverCounterSat, 496 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 1926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 496 IncrementalHoareTripleChecker+Valid, 1430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:10:49,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [341 Valid, 579 Invalid, 1926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [496 Valid, 1430 Invalid, 0 Unknown, 0 Unchecked, 35.2s Time] [2021-11-23 17:10:49,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11825 states. [2021-11-23 17:10:49,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11825 to 11448. [2021-11-23 17:10:49,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11448 states, 11447 states have (on average 1.155062461780379) internal successors, (13222), 11447 states have internal predecessors, (13222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:10:49,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11448 states to 11448 states and 13222 transitions. [2021-11-23 17:10:49,404 INFO L78 Accepts]: Start accepts. Automaton has 11448 states and 13222 transitions. Word has length 725 [2021-11-23 17:10:49,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:10:49,405 INFO L470 AbstractCegarLoop]: Abstraction has 11448 states and 13222 transitions. [2021-11-23 17:10:49,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 129.25) internal successors, (517), 4 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:10:49,406 INFO L276 IsEmpty]: Start isEmpty. Operand 11448 states and 13222 transitions. [2021-11-23 17:10:49,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 802 [2021-11-23 17:10:49,428 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:10:49,431 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:10:49,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-23 17:10:49,672 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (20)] Ended with exit code 0 [2021-11-23 17:10:49,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:10:49,868 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:10:49,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:10:49,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1612056653, now seen corresponding path program 1 times [2021-11-23 17:10:49,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:10:49,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [732291682] [2021-11-23 17:10:49,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:10:49,873 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:10:49,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:10:49,874 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:10:49,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-23 17:10:50,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:10:50,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 871 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:10:50,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:10:53,395 INFO L134 CoverageAnalysis]: Checked inductivity of 1095 backedges. 395 proven. 32 refuted. 0 times theorem prover too weak. 668 trivial. 0 not checked. [2021-11-23 17:10:53,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:10:56,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1095 backedges. 395 proven. 32 refuted. 0 times theorem prover too weak. 668 trivial. 0 not checked. [2021-11-23 17:10:56,391 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:10:56,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [732291682] [2021-11-23 17:10:56,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [732291682] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:10:56,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1551613067] [2021-11-23 17:10:56,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:10:56,393 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:10:56,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:10:56,402 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:10:56,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-11-23 17:10:57,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:10:58,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 871 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:10:58,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:11:02,045 INFO L134 CoverageAnalysis]: Checked inductivity of 1095 backedges. 660 proven. 232 refuted. 0 times theorem prover too weak. 203 trivial. 0 not checked. [2021-11-23 17:11:02,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:11:06,315 INFO L134 CoverageAnalysis]: Checked inductivity of 1095 backedges. 660 proven. 232 refuted. 0 times theorem prover too weak. 203 trivial. 0 not checked. [2021-11-23 17:11:06,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1551613067] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:11:06,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85504833] [2021-11-23 17:11:06,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:11:06,316 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:11:06,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:11:06,317 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:11:06,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4095fd23-994a-48dd-9dad-6af5514e7b76/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-23 17:11:06,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:11:06,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 871 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:11:06,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:11:09,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1095 backedges. 689 proven. 90 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2021-11-23 17:11:09,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:11:12,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1095 backedges. 689 proven. 90 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2021-11-23 17:11:12,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85504833] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:11:12,736 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:11:12,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 4, 4, 4, 4] total 15 [2021-11-23 17:11:12,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422027071] [2021-11-23 17:11:12,738 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:11:12,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 17:11:12,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:11:12,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 17:11:12,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-11-23 17:11:12,744 INFO L87 Difference]: Start difference. First operand 11448 states and 13222 transitions. Second operand has 16 states, 16 states have (on average 89.25) internal successors, (1428), 15 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:11:19,243 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:11:48,810 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:12:11,406 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:12:14,725 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:12:17,944 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:12:46,377 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:12:50,309 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:13:22,498 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:14:59,079 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:15:28,663 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:15:38,994 WARN L534 Checker$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 17:16:23,343 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:16:29,977 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:16:41,178 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers []