./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem11_label50.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_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/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_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem11_label50.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/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_bfefa254-d94e-4263-830d-04341de2c3f8/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 56e7a4db9e890bad4c6ba22e9e20439c94d0afdecfe3e8cad4ffb71abf5e0a33 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:25:02,380 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:25:02,383 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:25:02,442 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:25:02,443 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:25:02,444 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:25:02,446 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:25:02,449 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:25:02,452 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:25:02,453 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:25:02,455 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:25:02,456 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:25:02,457 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:25:02,458 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:25:02,460 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:25:02,462 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:25:02,464 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:25:02,465 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:25:02,468 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:25:02,471 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:25:02,473 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:25:02,475 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:25:02,477 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:25:02,478 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:25:02,483 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:25:02,483 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:25:02,484 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:25:02,485 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:25:02,486 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:25:02,487 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:25:02,488 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:25:02,489 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:25:02,490 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:25:02,491 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:25:02,493 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:25:02,493 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:25:02,494 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:25:02,494 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:25:02,494 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:25:02,496 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:25:02,496 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:25:02,497 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 17:25:02,527 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:25:02,527 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:25:02,527 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:25:02,528 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:25:02,528 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:25:02,529 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:25:02,529 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:25:02,529 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:25:02,530 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:25:02,530 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 17:25:02,530 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:25:02,530 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:25:02,530 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 17:25:02,531 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 17:25:02,531 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:25:02,531 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 17:25:02,531 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 17:25:02,532 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 17:25:02,532 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:25:02,533 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:25:02,533 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 17:25:02,533 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:25:02,533 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:25:02,534 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:25:02,534 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:25:02,534 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:25:02,534 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:25:02,534 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:25:02,535 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:25:02,535 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:25:02,535 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:25:02,535 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:25:02,536 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:25:02,536 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:25:02,536 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:25:02,536 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:25:02,537 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 17:25:02,537 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 17:25:02,537 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:25:02,537 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:25:02,537 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:25:02,538 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_bfefa254-d94e-4263-830d-04341de2c3f8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 56e7a4db9e890bad4c6ba22e9e20439c94d0afdecfe3e8cad4ffb71abf5e0a33 [2021-11-23 17:25:02,809 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:25:02,831 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:25:02,833 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:25:02,835 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:25:02,836 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:25:02,837 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/eca-rers2012/Problem11_label50.c [2021-11-23 17:25:02,909 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/data/0dab7db22/cc38a578d2454ffaa1deac804b82f5c3/FLAG636f97c27 [2021-11-23 17:25:03,511 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:25:03,512 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/sv-benchmarks/c/eca-rers2012/Problem11_label50.c [2021-11-23 17:25:03,528 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/data/0dab7db22/cc38a578d2454ffaa1deac804b82f5c3/FLAG636f97c27 [2021-11-23 17:25:03,722 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/data/0dab7db22/cc38a578d2454ffaa1deac804b82f5c3 [2021-11-23 17:25:03,725 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:25:03,726 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:25:03,728 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:25:03,728 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:25:03,732 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:25:03,733 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:25:03" (1/1) ... [2021-11-23 17:25:03,737 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46467c85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:25:03, skipping insertion in model container [2021-11-23 17:25:03,737 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:25:03" (1/1) ... [2021-11-23 17:25:03,746 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:25:03,820 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:25:04,082 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_bfefa254-d94e-4263-830d-04341de2c3f8/sv-benchmarks/c/eca-rers2012/Problem11_label50.c[5287,5300] [2021-11-23 17:25:04,448 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:25:04,457 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:25:04,482 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_bfefa254-d94e-4263-830d-04341de2c3f8/sv-benchmarks/c/eca-rers2012/Problem11_label50.c[5287,5300] [2021-11-23 17:25:04,736 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:25:04,753 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:25:04,753 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:25:04 WrapperNode [2021-11-23 17:25:04,754 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:25:04,755 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:25:04,755 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:25:04,756 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:25:04,763 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:25:04" (1/1) ... [2021-11-23 17:25:04,811 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:25:04" (1/1) ... [2021-11-23 17:25:04,916 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 999 [2021-11-23 17:25:04,917 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:25:04,918 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:25:04,918 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:25:04,918 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:25:04,928 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:25:04" (1/1) ... [2021-11-23 17:25:04,929 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:25:04" (1/1) ... [2021-11-23 17:25:04,940 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:25:04" (1/1) ... [2021-11-23 17:25:04,940 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:25:04" (1/1) ... [2021-11-23 17:25:04,996 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:25:04" (1/1) ... [2021-11-23 17:25:05,018 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:25:04" (1/1) ... [2021-11-23 17:25:05,046 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:25:04" (1/1) ... [2021-11-23 17:25:05,069 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:25:05,070 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:25:05,070 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:25:05,070 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:25:05,072 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:25:04" (1/1) ... [2021-11-23 17:25:05,080 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:25:05,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:25:05,111 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:25:05,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:25:05,177 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:25:05,178 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 17:25:05,178 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:25:05,178 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:25:05,253 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:25:05,255 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:25:07,059 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:25:07,122 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 17:25:07,128 INFO L158 Benchmark]: Toolchain (without parser) took 3399.22ms. Allocated memory was 98.6MB in the beginning and 218.1MB in the end (delta: 119.5MB). Free memory was 53.8MB in the beginning and 154.8MB in the end (delta: -101.0MB). Peak memory consumption was 39.9MB. Max. memory is 16.1GB. [2021-11-23 17:25:07,128 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 98.6MB. Free memory is still 73.1MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:25:07,130 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1026.15ms. Allocated memory was 98.6MB in the beginning and 127.9MB in the end (delta: 29.4MB). Free memory was 53.5MB in the beginning and 97.7MB in the end (delta: -44.2MB). Peak memory consumption was 21.7MB. Max. memory is 16.1GB. [2021-11-23 17:25:07,131 INFO L158 Benchmark]: Boogie Procedure Inliner took 161.79ms. Allocated memory is still 127.9MB. Free memory was 97.7MB in the beginning and 80.9MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2021-11-23 17:25:07,132 INFO L158 Benchmark]: Boogie Preprocessor took 151.22ms. Allocated memory is still 127.9MB. Free memory was 80.5MB in the beginning and 71.1MB in the end (delta: 9.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-23 17:25:07,133 INFO L158 Benchmark]: RCFGBuilder took 2054.44ms. Allocated memory was 127.9MB in the beginning and 218.1MB in the end (delta: 90.2MB). Free memory was 71.1MB in the beginning and 154.8MB in the end (delta: -83.7MB). Peak memory consumption was 28.7MB. Max. memory is 16.1GB. [2021-11-23 17:25:07,143 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 98.6MB. Free memory is still 73.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1026.15ms. Allocated memory was 98.6MB in the beginning and 127.9MB in the end (delta: 29.4MB). Free memory was 53.5MB in the beginning and 97.7MB in the end (delta: -44.2MB). Peak memory consumption was 21.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 161.79ms. Allocated memory is still 127.9MB. Free memory was 97.7MB in the beginning and 80.9MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Preprocessor took 151.22ms. Allocated memory is still 127.9MB. Free memory was 80.5MB in the beginning and 71.1MB in the end (delta: 9.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * RCFGBuilder took 2054.44ms. Allocated memory was 127.9MB in the beginning and 218.1MB in the end (delta: 90.2MB). Free memory was 71.1MB in the beginning and 154.8MB in the end (delta: -83.7MB). Peak memory consumption was 28.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: - ExceptionOrErrorResult: UnsupportedOperationException: Set is immutable de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: UnsupportedOperationException: Set is immutable: de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-23 17:25:07,169 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/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_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/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_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem11_label50.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/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_bfefa254-d94e-4263-830d-04341de2c3f8/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 56e7a4db9e890bad4c6ba22e9e20439c94d0afdecfe3e8cad4ffb71abf5e0a33 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:25:09,862 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:25:09,864 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:25:09,914 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:25:09,915 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:25:09,921 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:25:09,923 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:25:09,928 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:25:09,932 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:25:09,945 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:25:09,946 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:25:09,947 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:25:09,948 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:25:09,949 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:25:09,951 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:25:09,953 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:25:09,954 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:25:09,955 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:25:09,957 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:25:09,960 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:25:09,963 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:25:09,967 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:25:09,972 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:25:09,973 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:25:09,978 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:25:09,978 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:25:09,979 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:25:09,980 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:25:09,981 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:25:09,982 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:25:09,983 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:25:09,984 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:25:09,985 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:25:09,994 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:25:09,997 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:25:09,998 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:25:09,999 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:25:09,999 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:25:10,007 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:25:10,010 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:25:10,011 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:25:10,012 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 17:25:10,063 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:25:10,063 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:25:10,064 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:25:10,064 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:25:10,065 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:25:10,065 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:25:10,065 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:25:10,066 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:25:10,066 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:25:10,067 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:25:10,068 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:25:10,068 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:25:10,070 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:25:10,070 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:25:10,070 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:25:10,070 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:25:10,070 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:25:10,071 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:25:10,071 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:25:10,071 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 17:25:10,071 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 17:25:10,071 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 17:25:10,072 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:25:10,072 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:25:10,072 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:25:10,072 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:25:10,073 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:25:10,073 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 17:25:10,073 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:25:10,073 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:25:10,073 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:25:10,074 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:25:10,074 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:25:10,074 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 17:25:10,075 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 17:25:10,075 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:25:10,075 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:25:10,076 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:25:10,076 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_bfefa254-d94e-4263-830d-04341de2c3f8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 56e7a4db9e890bad4c6ba22e9e20439c94d0afdecfe3e8cad4ffb71abf5e0a33 [2021-11-23 17:25:10,503 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:25:10,535 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:25:10,538 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:25:10,540 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:25:10,540 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:25:10,542 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/eca-rers2012/Problem11_label50.c [2021-11-23 17:25:10,625 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/data/76f014722/5be71c3f60e84f2ba659dd4c7e6f4a45/FLAGf40fd271e [2021-11-23 17:25:11,463 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:25:11,464 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/sv-benchmarks/c/eca-rers2012/Problem11_label50.c [2021-11-23 17:25:11,478 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/data/76f014722/5be71c3f60e84f2ba659dd4c7e6f4a45/FLAGf40fd271e [2021-11-23 17:25:11,582 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/data/76f014722/5be71c3f60e84f2ba659dd4c7e6f4a45 [2021-11-23 17:25:11,585 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:25:11,587 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:25:11,589 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:25:11,589 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:25:11,593 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:25:11,595 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:25:11" (1/1) ... [2021-11-23 17:25:11,596 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@201d049c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:25:11, skipping insertion in model container [2021-11-23 17:25:11,596 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:25:11" (1/1) ... [2021-11-23 17:25:11,605 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:25:11,689 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:25:11,924 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_bfefa254-d94e-4263-830d-04341de2c3f8/sv-benchmarks/c/eca-rers2012/Problem11_label50.c[5287,5300] [2021-11-23 17:25:12,338 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:25:12,360 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:25:12,413 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_bfefa254-d94e-4263-830d-04341de2c3f8/sv-benchmarks/c/eca-rers2012/Problem11_label50.c[5287,5300] [2021-11-23 17:25:12,594 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:25:12,611 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:25:12,612 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:25:12 WrapperNode [2021-11-23 17:25:12,612 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:25:12,613 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:25:12,622 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:25:12,623 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:25:12,631 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:25:12" (1/1) ... [2021-11-23 17:25:12,673 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:25:12" (1/1) ... [2021-11-23 17:25:12,755 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 997 [2021-11-23 17:25:12,756 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:25:12,757 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:25:12,757 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:25:12,757 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:25:12,767 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:25:12" (1/1) ... [2021-11-23 17:25:12,767 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:25:12" (1/1) ... [2021-11-23 17:25:12,774 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:25:12" (1/1) ... [2021-11-23 17:25:12,781 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:25:12" (1/1) ... [2021-11-23 17:25:12,829 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:25:12" (1/1) ... [2021-11-23 17:25:12,858 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:25:12" (1/1) ... [2021-11-23 17:25:12,871 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:25:12" (1/1) ... [2021-11-23 17:25:12,885 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:25:12,886 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:25:12,886 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:25:12,887 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:25:12,888 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:25:12" (1/1) ... [2021-11-23 17:25:12,896 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:25:12,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:25:12,922 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:25:12,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:25:12,980 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:25:12,980 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 17:25:12,980 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:25:12,981 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:25:13,056 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:25:13,058 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:25:21,424 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:25:21,436 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 17:25:21,436 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 17:25:21,439 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:25:21 BoogieIcfgContainer [2021-11-23 17:25:21,439 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 17:25:21,441 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 17:25:21,441 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 17:25:21,444 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 17:25:21,445 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 05:25:11" (1/3) ... [2021-11-23 17:25:21,445 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76661a66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:25:21, skipping insertion in model container [2021-11-23 17:25:21,446 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:25:12" (2/3) ... [2021-11-23 17:25:21,446 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76661a66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:25:21, skipping insertion in model container [2021-11-23 17:25:21,446 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:25:21" (3/3) ... [2021-11-23 17:25:21,448 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem11_label50.c [2021-11-23 17:25:21,454 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 17:25:21,454 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 17:25:21,505 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 17:25:21,520 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 17:25:21,522 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 17:25:21,556 INFO L276 IsEmpty]: Start isEmpty. Operand has 283 states, 281 states have (on average 1.7153024911032029) internal successors, (482), 282 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:21,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-23 17:25:21,564 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:25:21,565 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] [2021-11-23 17:25:21,566 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:25:21,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:25:21,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1318097310, now seen corresponding path program 1 times [2021-11-23 17:25:21,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:25:21,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [374364924] [2021-11-23 17:25:21,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:21,590 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:25:21,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:25:21,597 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:25:21,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 17:25:21,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:21,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:25:21,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:22,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:25:22,044 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:25:22,044 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:25:22,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [374364924] [2021-11-23 17:25:22,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [374364924] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:25:22,046 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:25:22,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:25:22,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807437489] [2021-11-23 17:25:22,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:25:22,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:25:22,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:25:22,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:25:22,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:25:22,091 INFO L87 Difference]: Start difference. First operand has 283 states, 281 states have (on average 1.7153024911032029) internal successors, (482), 282 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 2 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:31,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:25:31,212 INFO L93 Difference]: Finished difference Result 758 states and 1342 transitions. [2021-11-23 17:25:31,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:25:31,223 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 2 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-23 17:25:31,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:25:31,257 INFO L225 Difference]: With dead ends: 758 [2021-11-23 17:25:31,257 INFO L226 Difference]: Without dead ends: 410 [2021-11-23 17:25:31,273 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 34 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 17:25:31,280 INFO L933 BasicCegarLoop]: 188 mSDtfsCounter, 189 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:25:31,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 220 Invalid, 750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 618 Invalid, 0 Unknown, 0 Unchecked, 9.0s Time] [2021-11-23 17:25:31,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-11-23 17:25:31,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 410. [2021-11-23 17:25:31,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 1.4572127139364304) internal successors, (596), 409 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:31,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 596 transitions. [2021-11-23 17:25:31,409 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 596 transitions. Word has length 36 [2021-11-23 17:25:31,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:25:31,410 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 596 transitions. [2021-11-23 17:25:31,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 2 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:31,413 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 596 transitions. [2021-11-23 17:25:31,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-23 17:25:31,421 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:25:31,423 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:25:31,441 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 17:25:31,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:25:31,641 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:25:31,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:25:31,642 INFO L85 PathProgramCache]: Analyzing trace with hash -464053414, now seen corresponding path program 1 times [2021-11-23 17:25:31,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:25:31,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [726576651] [2021-11-23 17:25:31,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:31,644 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:25:31,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:25:31,648 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:25:31,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 17:25:31,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:31,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:25:31,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:32,240 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:25:32,240 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:25:32,241 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:25:32,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [726576651] [2021-11-23 17:25:32,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [726576651] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:25:32,241 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:25:32,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:25:32,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493304021] [2021-11-23 17:25:32,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:25:32,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:25:32,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:25:32,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:25:32,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:25:32,245 INFO L87 Difference]: Start difference. First operand 410 states and 596 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:42,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:25:42,406 INFO L93 Difference]: Finished difference Result 1202 states and 1754 transitions. [2021-11-23 17:25:42,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:25:42,414 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 0 states have call successors, (0), 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 104 [2021-11-23 17:25:42,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:25:42,420 INFO L225 Difference]: With dead ends: 1202 [2021-11-23 17:25:42,420 INFO L226 Difference]: Without dead ends: 794 [2021-11-23 17:25:42,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 102 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 17:25:42,424 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 133 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:25:42,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 186 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 10.1s Time] [2021-11-23 17:25:42,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2021-11-23 17:25:42,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 782. [2021-11-23 17:25:42,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 782 states, 781 states have (on average 1.3482714468629962) internal successors, (1053), 781 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:42,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 782 states to 782 states and 1053 transitions. [2021-11-23 17:25:42,466 INFO L78 Accepts]: Start accepts. Automaton has 782 states and 1053 transitions. Word has length 104 [2021-11-23 17:25:42,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:25:42,467 INFO L470 AbstractCegarLoop]: Abstraction has 782 states and 1053 transitions. [2021-11-23 17:25:42,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:42,467 INFO L276 IsEmpty]: Start isEmpty. Operand 782 states and 1053 transitions. [2021-11-23 17:25:42,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-23 17:25:42,470 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:25:42,470 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:25:42,486 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-23 17:25:42,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:25:42,683 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:25:42,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:25:42,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1917234118, now seen corresponding path program 1 times [2021-11-23 17:25:42,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:25:42,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [654395623] [2021-11-23 17:25:42,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:42,686 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:25:42,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:25:42,687 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:25:42,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 17:25:42,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:42,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:25:42,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:43,180 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:25:43,181 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:25:43,181 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:25:43,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [654395623] [2021-11-23 17:25:43,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [654395623] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:25:43,182 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:25:43,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:25:43,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65053940] [2021-11-23 17:25:43,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:25:43,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:25:43,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:25:43,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:25:43,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:25:43,184 INFO L87 Difference]: Start difference. First operand 782 states and 1053 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 2 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:51,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:25:51,092 INFO L93 Difference]: Finished difference Result 1931 states and 2546 transitions. [2021-11-23 17:25:51,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:25:51,112 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 2 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-11-23 17:25:51,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:25:51,119 INFO L225 Difference]: With dead ends: 1931 [2021-11-23 17:25:51,119 INFO L226 Difference]: Without dead ends: 1151 [2021-11-23 17:25:51,120 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 110 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 17:25:51,122 INFO L933 BasicCegarLoop]: 168 mSDtfsCounter, 112 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 541 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2021-11-23 17:25:51,122 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 194 Invalid, 570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 541 Invalid, 0 Unknown, 0 Unchecked, 7.9s Time] [2021-11-23 17:25:51,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1151 states. [2021-11-23 17:25:51,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1151 to 1150. [2021-11-23 17:25:51,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1150 states, 1149 states have (on average 1.257615317667537) internal successors, (1445), 1149 states have internal predecessors, (1445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:51,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 1445 transitions. [2021-11-23 17:25:51,155 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 1445 transitions. Word has length 112 [2021-11-23 17:25:51,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:25:51,156 INFO L470 AbstractCegarLoop]: Abstraction has 1150 states and 1445 transitions. [2021-11-23 17:25:51,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 2 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:51,156 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 1445 transitions. [2021-11-23 17:25:51,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-11-23 17:25:51,160 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:25:51,160 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:25:51,181 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-23 17:25:51,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:25:51,372 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:25:51,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:25:51,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1754552329, now seen corresponding path program 1 times [2021-11-23 17:25:51,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:25:51,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [11235967] [2021-11-23 17:25:51,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:51,380 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:25:51,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:25:51,381 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:25:51,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-23 17:25:51,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:51,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:25:51,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:51,930 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:25:51,930 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:25:51,930 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:25:51,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [11235967] [2021-11-23 17:25:51,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [11235967] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:25:51,931 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:25:51,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:25:51,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910881299] [2021-11-23 17:25:51,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:25:51,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:25:51,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:25:51,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:25:51,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:25:51,933 INFO L87 Difference]: Start difference. First operand 1150 states and 1445 transitions. Second operand has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:26:00,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:26:00,378 INFO L93 Difference]: Finished difference Result 2314 states and 3057 transitions. [2021-11-23 17:26:00,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:26:00,384 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 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 163 [2021-11-23 17:26:00,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:26:00,393 INFO L225 Difference]: With dead ends: 2314 [2021-11-23 17:26:00,393 INFO L226 Difference]: Without dead ends: 1534 [2021-11-23 17:26:00,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 161 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 17:26:00,396 INFO L933 BasicCegarLoop]: 316 mSDtfsCounter, 169 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2021-11-23 17:26:00,397 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 337 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 8.4s Time] [2021-11-23 17:26:00,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1534 states. [2021-11-23 17:26:00,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1534 to 1526. [2021-11-23 17:26:00,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1526 states, 1525 states have (on average 1.2452459016393442) internal successors, (1899), 1525 states have internal predecessors, (1899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:26:00,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1526 states to 1526 states and 1899 transitions. [2021-11-23 17:26:00,437 INFO L78 Accepts]: Start accepts. Automaton has 1526 states and 1899 transitions. Word has length 163 [2021-11-23 17:26:00,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:26:00,438 INFO L470 AbstractCegarLoop]: Abstraction has 1526 states and 1899 transitions. [2021-11-23 17:26:00,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:26:00,438 INFO L276 IsEmpty]: Start isEmpty. Operand 1526 states and 1899 transitions. [2021-11-23 17:26:00,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2021-11-23 17:26:00,442 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:26:00,443 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-23 17:26:00,458 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-23 17:26:00,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:26:00,654 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:26:00,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:26:00,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1223784736, now seen corresponding path program 1 times [2021-11-23 17:26:00,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:26:00,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1436111266] [2021-11-23 17:26:00,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:26:00,659 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:26:00,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:26:00,663 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:26:00,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 17:26:00,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:26:00,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:26:00,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:26:02,998 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 67 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:26:02,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:26:07,122 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 135 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:26:07,123 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:26:07,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1436111266] [2021-11-23 17:26:07,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1436111266] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 17:26:07,124 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 17:26:07,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-23 17:26:07,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040439031] [2021-11-23 17:26:07,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:26:07,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:26:07,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:26:07,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:26:07,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:26:07,126 INFO L87 Difference]: Start difference. First operand 1526 states and 1899 transitions. Second operand has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:26:25,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:26:25,813 INFO L93 Difference]: Finished difference Result 2677 states and 3524 transitions. [2021-11-23 17:26:25,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:26:25,820 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 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 217 [2021-11-23 17:26:25,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:26:25,835 INFO L225 Difference]: With dead ends: 2677 [2021-11-23 17:26:25,836 INFO L226 Difference]: Without dead ends: 2079 [2021-11-23 17:26:25,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:26:25,839 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 150 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 239 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 239 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.6s IncrementalHoareTripleChecker+Time [2021-11-23 17:26:25,839 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 49 Invalid, 746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [239 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 18.6s Time] [2021-11-23 17:26:25,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2079 states. [2021-11-23 17:26:25,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2079 to 2079. [2021-11-23 17:26:25,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2079 states, 2078 states have (on average 1.269971126082772) internal successors, (2639), 2078 states have internal predecessors, (2639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:26:25,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2079 states to 2079 states and 2639 transitions. [2021-11-23 17:26:25,912 INFO L78 Accepts]: Start accepts. Automaton has 2079 states and 2639 transitions. Word has length 217 [2021-11-23 17:26:25,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:26:25,913 INFO L470 AbstractCegarLoop]: Abstraction has 2079 states and 2639 transitions. [2021-11-23 17:26:25,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:26:25,914 INFO L276 IsEmpty]: Start isEmpty. Operand 2079 states and 2639 transitions. [2021-11-23 17:26:25,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2021-11-23 17:26:25,919 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:26:25,919 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:26:25,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-23 17:26:26,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:26:26,134 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:26:26,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:26:26,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1136364984, now seen corresponding path program 1 times [2021-11-23 17:26:26,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:26:26,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [511380925] [2021-11-23 17:26:26,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:26:26,137 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:26:26,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:26:26,138 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:26:26,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 17:26:26,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:26:26,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 17:26:26,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:26:30,769 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 46 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:26:30,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:27:13,442 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 125 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:27:13,443 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:27:13,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [511380925] [2021-11-23 17:27:13,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [511380925] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:27:13,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [549834060] [2021-11-23 17:27:13,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:27:13,444 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:27:13,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:27:13,450 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:27:13,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-23 17:27:13,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:27:13,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 17:27:13,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:27:14,932 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-11-23 17:27:14,932 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:27:14,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [549834060] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:27:14,932 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 17:27:14,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 10 [2021-11-23 17:27:14,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942259078] [2021-11-23 17:27:14,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:27:14,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:27:14,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:27:14,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:27:14,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-23 17:27:14,935 INFO L87 Difference]: Start difference. First operand 2079 states and 2639 transitions. Second operand has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:27:22,333 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 17:27:35,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:27:35,381 INFO L93 Difference]: Finished difference Result 4910 states and 6441 transitions. [2021-11-23 17:27:35,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 17:27:35,392 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 0 states have call successors, (0), 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 228 [2021-11-23 17:27:35,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:27:35,410 INFO L225 Difference]: With dead ends: 4910 [2021-11-23 17:27:35,411 INFO L226 Difference]: Without dead ends: 3201 [2021-11-23 17:27:35,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 683 GetRequests, 674 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-11-23 17:27:35,415 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 397 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 1108 mSolverCounterSat, 322 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 397 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 1430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 322 IncrementalHoareTripleChecker+Valid, 1108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:27:35,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [397 Valid, 66 Invalid, 1430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [322 Valid, 1108 Invalid, 0 Unknown, 0 Unchecked, 20.3s Time] [2021-11-23 17:27:35,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3201 states. [2021-11-23 17:27:35,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3201 to 2817. [2021-11-23 17:27:35,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2817 states, 2816 states have (on average 1.2862215909090908) internal successors, (3622), 2816 states have internal predecessors, (3622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:27:35,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2817 states to 2817 states and 3622 transitions. [2021-11-23 17:27:35,488 INFO L78 Accepts]: Start accepts. Automaton has 2817 states and 3622 transitions. Word has length 228 [2021-11-23 17:27:35,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:27:35,489 INFO L470 AbstractCegarLoop]: Abstraction has 2817 states and 3622 transitions. [2021-11-23 17:27:35,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:27:35,490 INFO L276 IsEmpty]: Start isEmpty. Operand 2817 states and 3622 transitions. [2021-11-23 17:27:35,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2021-11-23 17:27:35,494 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:27:35,494 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-23 17:27:35,507 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-11-23 17:27:35,715 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-23 17:27:35,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:27:35,906 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:27:35,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:27:35,906 INFO L85 PathProgramCache]: Analyzing trace with hash 818847857, now seen corresponding path program 1 times [2021-11-23 17:27:35,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:27:35,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [195053561] [2021-11-23 17:27:35,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:27:35,908 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:27:35,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:27:35,911 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:27:35,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-23 17:27:36,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:27:36,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:27:36,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:27:36,565 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 134 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:27:36,565 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:27:36,565 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:27:36,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [195053561] [2021-11-23 17:27:36,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [195053561] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:27:36,566 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:27:36,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:27:36,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269498395] [2021-11-23 17:27:36,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:27:36,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:27:36,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:27:36,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:27:36,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:27:36,568 INFO L87 Difference]: Start difference. First operand 2817 states and 3622 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 17:27:45,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:27:45,339 INFO L93 Difference]: Finished difference Result 6734 states and 8873 transitions. [2021-11-23 17:27:45,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:27:45,344 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 17:27:45,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:27:45,369 INFO L225 Difference]: With dead ends: 6734 [2021-11-23 17:27:45,369 INFO L226 Difference]: Without dead ends: 4102 [2021-11-23 17:27:45,373 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 229 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 17:27:45,374 INFO L933 BasicCegarLoop]: 329 mSDtfsCounter, 152 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2021-11-23 17:27:45,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 349 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 8.7s Time] [2021-11-23 17:27:45,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4102 states. [2021-11-23 17:27:45,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4102 to 3918. [2021-11-23 17:27:45,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3918 states, 3917 states have (on average 1.2754659177942302) internal successors, (4996), 3917 states have internal predecessors, (4996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:27:45,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3918 states to 3918 states and 4996 transitions. [2021-11-23 17:27:45,489 INFO L78 Accepts]: Start accepts. Automaton has 3918 states and 4996 transitions. Word has length 231 [2021-11-23 17:27:45,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:27:45,490 INFO L470 AbstractCegarLoop]: Abstraction has 3918 states and 4996 transitions. [2021-11-23 17:27:45,490 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 17:27:45,490 INFO L276 IsEmpty]: Start isEmpty. Operand 3918 states and 4996 transitions. [2021-11-23 17:27:45,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2021-11-23 17:27:45,495 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:27:45,495 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-23 17:27:45,513 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-23 17:27:45,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:27:45,713 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:27:45,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:27:45,714 INFO L85 PathProgramCache]: Analyzing trace with hash -2015150127, now seen corresponding path program 1 times [2021-11-23 17:27:45,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:27:45,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2334301] [2021-11-23 17:27:45,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:27:45,716 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:27:45,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:27:45,718 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:27:45,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-23 17:27:45,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:27:45,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:27:45,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:27:46,549 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 134 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:27:46,550 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:27:46,550 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:27:46,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2334301] [2021-11-23 17:27:46,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2334301] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:27:46,550 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:27:46,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:27:46,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399771538] [2021-11-23 17:27:46,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:27:46,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:27:46,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:27:46,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:27:46,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:27:46,552 INFO L87 Difference]: Start difference. First operand 3918 states and 4996 transitions. Second operand has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:27:55,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:27:55,280 INFO L93 Difference]: Finished difference Result 8396 states and 10926 transitions. [2021-11-23 17:27:55,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:27:55,281 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 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 247 [2021-11-23 17:27:55,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:27:55,371 INFO L225 Difference]: With dead ends: 8396 [2021-11-23 17:27:55,371 INFO L226 Difference]: Without dead ends: 4848 [2021-11-23 17:27:55,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 245 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 17:27:55,377 INFO L933 BasicCegarLoop]: 337 mSDtfsCounter, 130 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2021-11-23 17:27:55,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 358 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 8.7s Time] [2021-11-23 17:27:55,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4848 states. [2021-11-23 17:27:55,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4848 to 4654. [2021-11-23 17:27:55,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4654 states, 4653 states have (on average 1.2342574683000216) internal successors, (5743), 4653 states have internal predecessors, (5743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:27:55,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4654 states to 4654 states and 5743 transitions. [2021-11-23 17:27:55,513 INFO L78 Accepts]: Start accepts. Automaton has 4654 states and 5743 transitions. Word has length 247 [2021-11-23 17:27:55,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:27:55,514 INFO L470 AbstractCegarLoop]: Abstraction has 4654 states and 5743 transitions. [2021-11-23 17:27:55,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:27:55,515 INFO L276 IsEmpty]: Start isEmpty. Operand 4654 states and 5743 transitions. [2021-11-23 17:27:55,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2021-11-23 17:27:55,526 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:27:55,527 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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 17:27:55,543 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-23 17:27:55,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:27:55,744 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:27:55,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:27:55,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1512775141, now seen corresponding path program 1 times [2021-11-23 17:27:55,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:27:55,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2082139117] [2021-11-23 17:27:55,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:27:55,747 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:27:55,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:27:55,748 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:27:55,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-23 17:27:56,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:27:56,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 17:27:56,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:28:00,157 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 246 proven. 96 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-23 17:28:00,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:28:06,161 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 325 proven. 17 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-23 17:28:06,161 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:28:06,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2082139117] [2021-11-23 17:28:06,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2082139117] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:28:06,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1301575847] [2021-11-23 17:28:06,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:28:06,162 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:28:06,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:28:06,163 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:28:06,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-23 17:28:06,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:28:06,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 17:28:06,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:28:11,744 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 246 proven. 96 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-23 17:28:11,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:28:16,665 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 342 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-23 17:28:16,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1301575847] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 17:28:16,666 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-23 17:28:16,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 4, 7] total 16 [2021-11-23 17:28:16,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800351097] [2021-11-23 17:28:16,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:28:16,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 17:28:16,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:28:16,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 17:28:16,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-11-23 17:28:16,668 INFO L87 Difference]: Start difference. First operand 4654 states and 5743 transitions. Second operand has 5 states, 5 states have (on average 60.4) internal successors, (302), 5 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:28:38,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:28:38,380 INFO L93 Difference]: Finished difference Result 11364 states and 14094 transitions. [2021-11-23 17:28:38,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 17:28:38,380 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 60.4) internal successors, (302), 5 states have internal predecessors, (302), 0 states have call successors, (0), 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 335 [2021-11-23 17:28:38,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:28:38,410 INFO L225 Difference]: With dead ends: 11364 [2021-11-23 17:28:38,410 INFO L226 Difference]: Without dead ends: 5784 [2021-11-23 17:28:38,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1338 GetRequests, 1323 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-11-23 17:28:38,417 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 430 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 1203 mSolverCounterSat, 391 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 1594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 391 IncrementalHoareTripleChecker+Valid, 1203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.5s IncrementalHoareTripleChecker+Time [2021-11-23 17:28:38,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [430 Valid, 136 Invalid, 1594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [391 Valid, 1203 Invalid, 0 Unknown, 0 Unchecked, 21.5s Time] [2021-11-23 17:28:38,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5784 states. [2021-11-23 17:28:38,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5784 to 5198. [2021-11-23 17:28:38,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5198 states, 5197 states have (on average 1.2243602078121993) internal successors, (6363), 5197 states have internal predecessors, (6363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:28:38,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5198 states to 5198 states and 6363 transitions. [2021-11-23 17:28:38,573 INFO L78 Accepts]: Start accepts. Automaton has 5198 states and 6363 transitions. Word has length 335 [2021-11-23 17:28:38,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:28:38,574 INFO L470 AbstractCegarLoop]: Abstraction has 5198 states and 6363 transitions. [2021-11-23 17:28:38,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 60.4) internal successors, (302), 5 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:28:38,574 INFO L276 IsEmpty]: Start isEmpty. Operand 5198 states and 6363 transitions. [2021-11-23 17:28:38,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2021-11-23 17:28:38,587 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:28:38,588 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:28:38,598 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-11-23 17:28:38,805 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Ended with exit code 0 [2021-11-23 17:28:38,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:28:38,994 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:28:38,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:28:38,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1638131916, now seen corresponding path program 1 times [2021-11-23 17:28:38,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:28:38,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [921612463] [2021-11-23 17:28:38,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:28:38,997 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:28:38,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:28:38,999 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:28:39,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-23 17:28:39,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:28:39,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 17:28:39,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:28:44,035 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 231 proven. 127 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-23 17:28:44,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:30:44,669 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 342 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-23 17:30:44,669 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:30:44,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [921612463] [2021-11-23 17:30:44,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [921612463] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:30:44,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2133310903] [2021-11-23 17:30:44,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:30:44,670 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:30:44,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:30:44,671 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:30:44,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-23 17:30:45,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:30:45,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:30:45,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:30:47,398 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 101 proven. 179 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-11-23 17:30:47,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:30:51,440 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 280 proven. 0 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-11-23 17:30:51,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2133310903] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 17:30:51,440 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-23 17:30:51,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4, 3] total 11 [2021-11-23 17:30:51,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7169463] [2021-11-23 17:30:51,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:30:51,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:30:51,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:30:51,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:30:51,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-23 17:30:51,442 INFO L87 Difference]: Start difference. First operand 5198 states and 6363 transitions. Second operand has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:01,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:31:01,981 INFO L93 Difference]: Finished difference Result 9661 states and 12125 transitions. [2021-11-23 17:31:01,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:31:01,981 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 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 345 [2021-11-23 17:31:01,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:31:02,010 INFO L225 Difference]: With dead ends: 9661 [2021-11-23 17:31:02,011 INFO L226 Difference]: Without dead ends: 6124 [2021-11-23 17:31:02,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1376 GetRequests, 1367 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-23 17:31:02,016 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 126 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.5s IncrementalHoareTripleChecker+Time [2021-11-23 17:31:02,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 64 Invalid, 709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 524 Invalid, 0 Unknown, 0 Unchecked, 10.5s Time] [2021-11-23 17:31:02,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6124 states. [2021-11-23 17:31:02,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6124 to 5382. [2021-11-23 17:31:02,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5382 states, 5381 states have (on average 1.2423341386359412) internal successors, (6685), 5381 states have internal predecessors, (6685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:02,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5382 states to 5382 states and 6685 transitions. [2021-11-23 17:31:02,156 INFO L78 Accepts]: Start accepts. Automaton has 5382 states and 6685 transitions. Word has length 345 [2021-11-23 17:31:02,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:31:02,157 INFO L470 AbstractCegarLoop]: Abstraction has 5382 states and 6685 transitions. [2021-11-23 17:31:02,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:02,157 INFO L276 IsEmpty]: Start isEmpty. Operand 5382 states and 6685 transitions. [2021-11-23 17:31:02,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2021-11-23 17:31:02,165 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:31:02,166 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:31:02,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-23 17:31:02,370 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-23 17:31:02,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:31:02,567 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:31:02,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:31:02,568 INFO L85 PathProgramCache]: Analyzing trace with hash -2105666786, now seen corresponding path program 1 times [2021-11-23 17:31:02,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:31:02,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [940154148] [2021-11-23 17:31:02,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:31:02,571 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:31:02,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:31:02,573 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:31:02,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-23 17:31:02,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:31:02,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:31:02,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:31:03,662 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 246 proven. 97 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-23 17:31:03,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:31:04,809 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 343 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-23 17:31:04,810 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:31:04,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [940154148] [2021-11-23 17:31:04,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [940154148] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 17:31:04,810 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 17:31:04,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-23 17:31:04,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153151789] [2021-11-23 17:31:04,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:31:04,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:31:04,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:31:04,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:31:04,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:31:04,813 INFO L87 Difference]: Start difference. First operand 5382 states and 6685 transitions. Second operand has 3 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:17,251 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:31:24,166 WARN L534 Checker$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 17:31:29,411 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:31:29,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:31:29,438 INFO L93 Difference]: Finished difference Result 12233 states and 15260 transitions. [2021-11-23 17:31:29,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:31:29,439 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 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 351 [2021-11-23 17:31:29,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:31:29,457 INFO L225 Difference]: With dead ends: 12233 [2021-11-23 17:31:29,457 INFO L226 Difference]: Without dead ends: 7221 [2021-11-23 17:31:29,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 700 GetRequests, 697 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:31:29,465 INFO L933 BasicCegarLoop]: 294 mSDtfsCounter, 111 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 142 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.5s IncrementalHoareTripleChecker+Time [2021-11-23 17:31:29,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 314 Invalid, 630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 487 Invalid, 1 Unknown, 0 Unchecked, 24.5s Time] [2021-11-23 17:31:29,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7221 states. [2021-11-23 17:31:29,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7221 to 7037. [2021-11-23 17:31:29,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7037 states, 7036 states have (on average 1.1981239340534395) internal successors, (8430), 7036 states have internal predecessors, (8430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:29,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7037 states to 7037 states and 8430 transitions. [2021-11-23 17:31:29,679 INFO L78 Accepts]: Start accepts. Automaton has 7037 states and 8430 transitions. Word has length 351 [2021-11-23 17:31:29,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:31:29,680 INFO L470 AbstractCegarLoop]: Abstraction has 7037 states and 8430 transitions. [2021-11-23 17:31:29,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:29,681 INFO L276 IsEmpty]: Start isEmpty. Operand 7037 states and 8430 transitions. [2021-11-23 17:31:29,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 399 [2021-11-23 17:31:29,696 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:31:29,697 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 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 17:31:29,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-23 17:31:29,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:31:29,902 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:31:29,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:31:29,902 INFO L85 PathProgramCache]: Analyzing trace with hash 184986994, now seen corresponding path program 1 times [2021-11-23 17:31:29,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:31:29,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [741362375] [2021-11-23 17:31:29,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:31:29,906 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:31:29,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:31:29,907 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:31:29,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-23 17:31:30,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:31:30,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 17:31:30,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:31:33,649 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 101 proven. 314 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:31:33,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:32:32,061 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 212 proven. 203 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:32:32,061 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:32:32,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [741362375] [2021-11-23 17:32:32,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [741362375] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:32:32,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [815591095] [2021-11-23 17:32:32,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:32:32,062 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:32:32,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:32:32,063 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:32:32,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-23 17:32:32,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:32:32,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:32:32,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:32:33,440 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 319 proven. 0 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-11-23 17:32:33,440 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:32:33,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [815591095] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:32:33,440 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 17:32:33,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 5] total 10 [2021-11-23 17:32:33,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452762653] [2021-11-23 17:32:33,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:32:33,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:32:33,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:32:33,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:32:33,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-23 17:32:33,443 INFO L87 Difference]: Start difference. First operand 7037 states and 8430 transitions. Second operand has 3 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:32:40,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:32:40,320 INFO L93 Difference]: Finished difference Result 12228 states and 14828 transitions. [2021-11-23 17:32:40,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:32:40,321 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 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 398 [2021-11-23 17:32:40,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:32:40,331 INFO L225 Difference]: With dead ends: 12228 [2021-11-23 17:32:40,332 INFO L226 Difference]: Without dead ends: 6852 [2021-11-23 17:32:40,337 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1191 GetRequests, 1183 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-23 17:32:40,338 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 94 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2021-11-23 17:32:40,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 140 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2021-11-23 17:32:40,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6852 states. [2021-11-23 17:32:40,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6852 to 6483. [2021-11-23 17:32:40,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6483 states, 6482 states have (on average 1.1195618636223388) internal successors, (7257), 6482 states have internal predecessors, (7257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:32:40,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6483 states to 6483 states and 7257 transitions. [2021-11-23 17:32:40,514 INFO L78 Accepts]: Start accepts. Automaton has 6483 states and 7257 transitions. Word has length 398 [2021-11-23 17:32:40,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:32:40,515 INFO L470 AbstractCegarLoop]: Abstraction has 6483 states and 7257 transitions. [2021-11-23 17:32:40,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:32:40,515 INFO L276 IsEmpty]: Start isEmpty. Operand 6483 states and 7257 transitions. [2021-11-23 17:32:40,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2021-11-23 17:32:40,527 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:32:40,528 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 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 17:32:40,553 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-23 17:32:40,743 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (17)] Ended with exit code 0 [2021-11-23 17:32:40,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:32:40,942 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:32:40,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:32:40,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1040683667, now seen corresponding path program 1 times [2021-11-23 17:32:40,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:32:40,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [133457380] [2021-11-23 17:32:40,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:32:40,946 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:32:40,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:32:40,947 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:32:40,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-23 17:32:41,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:32:41,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:32:41,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:32:42,292 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 294 proven. 102 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-23 17:32:42,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:32:43,443 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 396 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-23 17:32:43,444 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:32:43,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [133457380] [2021-11-23 17:32:43,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [133457380] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 17:32:43,444 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 17:32:43,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-23 17:32:43,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176292713] [2021-11-23 17:32:43,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:32:43,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:32:43,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:32:43,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:32:43,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:32:43,446 INFO L87 Difference]: Start difference. First operand 6483 states and 7257 transitions. Second operand has 3 states, 3 states have (on average 125.33333333333333) internal successors, (376), 3 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:33:18,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:33:18,772 INFO L93 Difference]: Finished difference Result 14623 states and 16388 transitions. [2021-11-23 17:33:18,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:33:18,773 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 125.33333333333333) internal successors, (376), 3 states have internal predecessors, (376), 0 states have call successors, (0), 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 409 [2021-11-23 17:33:18,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:33:18,788 INFO L225 Difference]: With dead ends: 14623 [2021-11-23 17:33:18,788 INFO L226 Difference]: Without dead ends: 8510 [2021-11-23 17:33:18,793 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 816 GetRequests, 813 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:33:18,794 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 129 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:33:18,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 61 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 528 Invalid, 0 Unknown, 0 Unchecked, 35.2s Time] [2021-11-23 17:33:18,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8510 states. [2021-11-23 17:33:18,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8510 to 7771. [2021-11-23 17:33:18,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7771 states, 7770 states have (on average 1.112998712998713) internal successors, (8648), 7770 states have internal predecessors, (8648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:33:19,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7771 states to 7771 states and 8648 transitions. [2021-11-23 17:33:19,003 INFO L78 Accepts]: Start accepts. Automaton has 7771 states and 8648 transitions. Word has length 409 [2021-11-23 17:33:19,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:33:19,004 INFO L470 AbstractCegarLoop]: Abstraction has 7771 states and 8648 transitions. [2021-11-23 17:33:19,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 125.33333333333333) internal successors, (376), 3 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:33:19,005 INFO L276 IsEmpty]: Start isEmpty. Operand 7771 states and 8648 transitions. [2021-11-23 17:33:19,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 429 [2021-11-23 17:33:19,016 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:33:19,016 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, 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, 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] [2021-11-23 17:33:19,049 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-23 17:33:19,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:33:19,237 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:33:19,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:33:19,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1768098881, now seen corresponding path program 1 times [2021-11-23 17:33:19,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:33:19,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [642806540] [2021-11-23 17:33:19,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:33:19,241 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:33:19,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:33:19,243 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:33:19,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-23 17:33:19,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:33:19,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 17:33:19,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:33:22,534 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 362 proven. 260 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-23 17:33:22,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:33:49,765 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 443 proven. 179 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-23 17:33:49,765 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:33:49,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [642806540] [2021-11-23 17:33:49,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [642806540] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:33:49,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [997368963] [2021-11-23 17:33:49,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:33:49,766 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:33:49,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:33:49,768 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:33:49,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-23 17:33:50,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:33:50,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 17:33:50,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:34:14,011 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 374 proven. 46 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2021-11-23 17:34:14,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:34:28,031 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 370 proven. 36 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2021-11-23 17:34:28,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [997368963] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:34:28,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44544980] [2021-11-23 17:34:28,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:34:28,032 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:34:28,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:34:28,033 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:34:28,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-23 17:34:28,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:34:28,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:34:28,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:34:48,098 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 541 proven. 0 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2021-11-23 17:34:48,098 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:34:48,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44544980] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:34:48,099 INFO L186 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2021-11-23 17:34:48,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 5, 6, 5] total 18 [2021-11-23 17:34:48,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186736681] [2021-11-23 17:34:48,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:34:48,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:34:48,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:34:48,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:34:48,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-11-23 17:34:48,102 INFO L87 Difference]: Start difference. First operand 7771 states and 8648 transitions. Second operand has 3 states, 3 states have (on average 105.0) internal successors, (315), 3 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:34:48,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:34:48,180 INFO L93 Difference]: Finished difference Result 13612 states and 15187 transitions. [2021-11-23 17:34:48,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:34:48,180 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 105.0) internal successors, (315), 3 states have internal predecessors, (315), 0 states have call successors, (0), 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 428 [2021-11-23 17:34:48,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:34:48,237 INFO L225 Difference]: With dead ends: 13612 [2021-11-23 17:34:48,237 INFO L226 Difference]: Without dead ends: 7869 [2021-11-23 17:34:48,257 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2135 GetRequests, 2119 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-11-23 17:34:48,258 INFO L933 BasicCegarLoop]: 343 mSDtfsCounter, 0 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 415 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:34:48,258 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 368 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 415 Unchecked, 0.0s Time] [2021-11-23 17:34:48,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7869 states. [2021-11-23 17:34:48,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7869 to 7869. [2021-11-23 17:34:48,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7869 states, 7868 states have (on average 1.112353838332486) internal successors, (8752), 7868 states have internal predecessors, (8752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:34:48,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7869 states to 7869 states and 8752 transitions. [2021-11-23 17:34:48,580 INFO L78 Accepts]: Start accepts. Automaton has 7869 states and 8752 transitions. Word has length 428 [2021-11-23 17:34:48,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:34:48,581 INFO L470 AbstractCegarLoop]: Abstraction has 7869 states and 8752 transitions. [2021-11-23 17:34:48,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.0) internal successors, (315), 3 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:34:48,582 INFO L276 IsEmpty]: Start isEmpty. Operand 7869 states and 8752 transitions. [2021-11-23 17:34:48,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 440 [2021-11-23 17:34:48,595 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:34:48,595 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:34:48,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2021-11-23 17:34:48,848 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-23 17:34:49,013 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-23 17:34:49,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:34:49,201 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:34:49,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:34:49,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1723619292, now seen corresponding path program 1 times [2021-11-23 17:34:49,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:34:49,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [234060950] [2021-11-23 17:34:49,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:34:49,205 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:34:49,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:34:49,206 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:34:49,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-23 17:34:49,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:34:49,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:34:49,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:34:51,077 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 362 proven. 269 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-23 17:34:51,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:34:59,601 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 631 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-23 17:34:59,601 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:34:59,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [234060950] [2021-11-23 17:34:59,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [234060950] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 17:34:59,601 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 17:34:59,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2021-11-23 17:34:59,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067764349] [2021-11-23 17:34:59,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:34:59,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:34:59,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:34:59,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:34:59,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:34:59,603 INFO L87 Difference]: Start difference. First operand 7869 states and 8752 transitions. Second operand has 4 states, 4 states have (on average 101.5) internal successors, (406), 4 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:35:15,459 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 17:35:30,776 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:35:38,625 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:35:40,345 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:35:52,519 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:35:54,065 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:36:00,457 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:36:08,227 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:36:09,614 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:36:15,080 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:36:17,744 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:36:21,218 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:36:24,750 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:36:26,958 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:36:30,683 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:36:32,573 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:36:48,371 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:36:52,036 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:36:52,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:36:52,273 INFO L93 Difference]: Finished difference Result 18687 states and 20893 transitions. [2021-11-23 17:36:52,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:36:52,288 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 101.5) internal successors, (406), 4 states have internal predecessors, (406), 0 states have call successors, (0), 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 439 [2021-11-23 17:36:52,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:36:52,307 INFO L225 Difference]: With dead ends: 18687 [2021-11-23 17:36:52,307 INFO L226 Difference]: Without dead ends: 11004 [2021-11-23 17:36:52,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 876 GetRequests, 871 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:36:52,314 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 373 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 828 mSolverCounterSat, 299 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 105.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 1127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 299 IncrementalHoareTripleChecker+Valid, 828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 112.5s IncrementalHoareTripleChecker+Time [2021-11-23 17:36:52,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [373 Valid, 51 Invalid, 1127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [299 Valid, 828 Invalid, 0 Unknown, 0 Unchecked, 112.5s Time] [2021-11-23 17:36:52,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11004 states. [2021-11-23 17:36:52,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11004 to 8322. [2021-11-23 17:36:52,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8322 states, 8321 states have (on average 1.1008292272563394) internal successors, (9160), 8321 states have internal predecessors, (9160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:36:52,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8322 states to 8322 states and 9160 transitions. [2021-11-23 17:36:52,557 INFO L78 Accepts]: Start accepts. Automaton has 8322 states and 9160 transitions. Word has length 439 [2021-11-23 17:36:52,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:36:52,557 INFO L470 AbstractCegarLoop]: Abstraction has 8322 states and 9160 transitions. [2021-11-23 17:36:52,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 101.5) internal successors, (406), 4 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:36:52,558 INFO L276 IsEmpty]: Start isEmpty. Operand 8322 states and 9160 transitions. [2021-11-23 17:36:52,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 449 [2021-11-23 17:36:52,569 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:36:52,569 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:36:52,589 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-23 17:36:52,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:36:52,786 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:36:52,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:36:52,786 INFO L85 PathProgramCache]: Analyzing trace with hash 823734312, now seen corresponding path program 1 times [2021-11-23 17:36:52,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:36:52,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [634753891] [2021-11-23 17:36:52,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:36:52,793 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:36:52,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:36:52,795 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:36:52,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfefa254-d94e-4263-830d-04341de2c3f8/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-23 17:36:53,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:36:53,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 17:36:53,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:36:57,688 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 0 proven. 280 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2021-11-23 17:36:57,688 INFO L328 TraceCheckSpWp]: Computing backward predicates...