./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/num_conversion_1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/num_conversion_1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P --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 bdb7543d1c240ce49edc036e26416805e34b577c5ba56fd044d3b26828ca42a8 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 00:56:11,336 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 00:56:11,338 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 00:56:11,395 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 00:56:11,396 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 00:56:11,400 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 00:56:11,402 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 00:56:11,407 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 00:56:11,410 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 00:56:11,413 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 00:56:11,414 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 00:56:11,415 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 00:56:11,416 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 00:56:11,417 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 00:56:11,419 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 00:56:11,421 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 00:56:11,422 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 00:56:11,423 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 00:56:11,426 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 00:56:11,429 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 00:56:11,431 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 00:56:11,433 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 00:56:11,435 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 00:56:11,436 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 00:56:11,440 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 00:56:11,440 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 00:56:11,441 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 00:56:11,442 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 00:56:11,442 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 00:56:11,444 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 00:56:11,444 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 00:56:11,445 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 00:56:11,446 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 00:56:11,448 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 00:56:11,449 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 00:56:11,450 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 00:56:11,451 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 00:56:11,451 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 00:56:11,451 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 00:56:11,452 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 00:56:11,453 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 00:56:11,457 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 00:56:11,490 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 00:56:11,490 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 00:56:11,491 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 00:56:11,491 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 00:56:11,491 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 00:56:11,492 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 00:56:11,492 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 00:56:11,492 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 00:56:11,492 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 00:56:11,493 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 00:56:11,493 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 00:56:11,493 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 00:56:11,493 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 00:56:11,494 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 00:56:11,494 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 00:56:11,494 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 00:56:11,494 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 00:56:11,495 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 00:56:11,495 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 00:56:11,496 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 00:56:11,496 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 00:56:11,496 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 00:56:11,496 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 00:56:11,497 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 00:56:11,497 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 00:56:11,497 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 00:56:11,497 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 00:56:11,498 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 00:56:11,498 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 00:56:11,498 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 00:56:11,498 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 00:56:11,499 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 00:56:11,499 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:56:11,499 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 00:56:11,499 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 00:56:11,500 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 00:56:11,500 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 00:56:11,500 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 00:56:11,500 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 00:56:11,500 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 00:56:11,501 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 00:56:11,501 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_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bdb7543d1c240ce49edc036e26416805e34b577c5ba56fd044d3b26828ca42a8 [2021-11-21 00:56:11,738 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 00:56:11,762 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 00:56:11,765 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 00:56:11,767 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 00:56:11,767 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 00:56:11,769 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/bitvector/num_conversion_1.c [2021-11-21 00:56:11,840 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/data/6f2935162/71851b2ff6974bb08b82ff80d3404b2a/FLAG72d7d1a66 [2021-11-21 00:56:12,336 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 00:56:12,337 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/sv-benchmarks/c/bitvector/num_conversion_1.c [2021-11-21 00:56:12,344 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/data/6f2935162/71851b2ff6974bb08b82ff80d3404b2a/FLAG72d7d1a66 [2021-11-21 00:56:12,732 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/data/6f2935162/71851b2ff6974bb08b82ff80d3404b2a [2021-11-21 00:56:12,736 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 00:56:12,738 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 00:56:12,744 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 00:56:12,744 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 00:56:12,748 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 00:56:12,749 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:56:12" (1/1) ... [2021-11-21 00:56:12,750 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37fac6b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:56:12, skipping insertion in model container [2021-11-21 00:56:12,751 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:56:12" (1/1) ... [2021-11-21 00:56:12,759 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 00:56:12,778 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 00:56:12,966 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_ed2dfded-0d06-4616-aa52-04ec74c44d35/sv-benchmarks/c/bitvector/num_conversion_1.c[673,686] [2021-11-21 00:56:12,992 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:56:13,000 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 00:56:13,011 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_ed2dfded-0d06-4616-aa52-04ec74c44d35/sv-benchmarks/c/bitvector/num_conversion_1.c[673,686] [2021-11-21 00:56:13,015 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:56:13,028 INFO L208 MainTranslator]: Completed translation [2021-11-21 00:56:13,029 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:56:13 WrapperNode [2021-11-21 00:56:13,029 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 00:56:13,030 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 00:56:13,031 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 00:56:13,031 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 00:56:13,038 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:56:13" (1/1) ... [2021-11-21 00:56:13,044 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:56:13" (1/1) ... [2021-11-21 00:56:13,061 INFO L137 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 34 [2021-11-21 00:56:13,061 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 00:56:13,062 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 00:56:13,062 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 00:56:13,063 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 00:56:13,069 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:56:13" (1/1) ... [2021-11-21 00:56:13,070 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:56:13" (1/1) ... [2021-11-21 00:56:13,071 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:56:13" (1/1) ... [2021-11-21 00:56:13,071 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:56:13" (1/1) ... [2021-11-21 00:56:13,074 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:56:13" (1/1) ... [2021-11-21 00:56:13,078 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:56:13" (1/1) ... [2021-11-21 00:56:13,079 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:56:13" (1/1) ... [2021-11-21 00:56:13,080 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 00:56:13,081 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 00:56:13,081 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 00:56:13,081 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 00:56:13,082 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:56:13" (1/1) ... [2021-11-21 00:56:13,090 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:56:13,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:56:13,111 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 00:56:13,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 00:56:13,149 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 00:56:13,149 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 00:56:13,149 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 00:56:13,149 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 00:56:13,205 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 00:56:13,207 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 00:56:13,280 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 00:56:13,306 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 00:56:13,306 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-21 00:56:13,309 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:56:13 BoogieIcfgContainer [2021-11-21 00:56:13,309 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 00:56:13,311 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 00:56:13,311 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 00:56:13,315 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 00:56:13,315 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 12:56:12" (1/3) ... [2021-11-21 00:56:13,316 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5afd9910 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:56:13, skipping insertion in model container [2021-11-21 00:56:13,316 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:56:13" (2/3) ... [2021-11-21 00:56:13,317 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5afd9910 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:56:13, skipping insertion in model container [2021-11-21 00:56:13,317 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:56:13" (3/3) ... [2021-11-21 00:56:13,318 INFO L111 eAbstractionObserver]: Analyzing ICFG num_conversion_1.c [2021-11-21 00:56:13,324 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 00:56:13,325 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 00:56:13,381 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 00:56:13,388 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 [2021-11-21 00:56:13,389 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 00:56:13,401 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:56:13,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-21 00:56:13,408 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:56:13,408 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-21 00:56:13,409 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:56:13,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:56:13,415 INFO L85 PathProgramCache]: Analyzing trace with hash 2098665, now seen corresponding path program 1 times [2021-11-21 00:56:13,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:56:13,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891927701] [2021-11-21 00:56:13,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:56:13,427 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:56:13,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:56:13,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:56:13,595 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:56:13,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891927701] [2021-11-21 00:56:13,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891927701] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:56:13,596 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:56:13,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 00:56:13,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254023458] [2021-11-21 00:56:13,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:56:13,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:56:13,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:56:13,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:56:13,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:56:13,636 INFO L87 Difference]: Start difference. First operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:56:13,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:56:13,662 INFO L93 Difference]: Finished difference Result 13 states and 15 transitions. [2021-11-21 00:56:13,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:56:13,665 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 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 4 [2021-11-21 00:56:13,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:56:13,672 INFO L225 Difference]: With dead ends: 13 [2021-11-21 00:56:13,673 INFO L226 Difference]: Without dead ends: 6 [2021-11-21 00:56:13,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:56:13,680 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:56:13,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:56:13,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2021-11-21 00:56:13,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2021-11-21 00:56:13,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:56:13,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2021-11-21 00:56:13,711 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2021-11-21 00:56:13,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:56:13,712 INFO L470 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2021-11-21 00:56:13,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:56:13,713 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2021-11-21 00:56:13,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-21 00:56:13,713 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:56:13,713 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-21 00:56:13,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 00:56:13,714 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:56:13,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:56:13,715 INFO L85 PathProgramCache]: Analyzing trace with hash 65017257, now seen corresponding path program 1 times [2021-11-21 00:56:13,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:56:13,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822689937] [2021-11-21 00:56:13,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:56:13,739 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:56:13,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:56:13,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:56:13,877 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:56:13,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822689937] [2021-11-21 00:56:13,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822689937] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:56:13,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016313864] [2021-11-21 00:56:13,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:56:13,879 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:56:13,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:56:13,881 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:56:13,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 00:56:13,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:56:13,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-21 00:56:13,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:56:13,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:56:13,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:56:14,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:56:14,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016313864] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:56:14,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [575778116] [2021-11-21 00:56:14,053 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-21 00:56:14,053 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:56:14,060 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:56:14,065 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:56:14,065 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:56:15,051 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:56:15,164 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:56:15,164 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:56:15,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2021-11-21 00:56:15,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523506405] [2021-11-21 00:56:15,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:56:15,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 00:56:15,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:56:15,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 00:56:15,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-21 00:56:15,168 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:56:15,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:56:15,207 INFO L93 Difference]: Finished difference Result 12 states and 14 transitions. [2021-11-21 00:56:15,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:56:15,208 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-21 00:56:15,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:56:15,208 INFO L225 Difference]: With dead ends: 12 [2021-11-21 00:56:15,208 INFO L226 Difference]: Without dead ends: 9 [2021-11-21 00:56:15,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-21 00:56:15,211 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:56:15,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 10 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:56:15,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-11-21 00:56:15,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-11-21 00:56:15,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:56:15,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2021-11-21 00:56:15,216 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 5 [2021-11-21 00:56:15,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:56:15,216 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2021-11-21 00:56:15,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:56:15,216 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2021-11-21 00:56:15,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-21 00:56:15,217 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:56:15,217 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1] [2021-11-21 00:56:15,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 00:56:15,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:56:15,432 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:56:15,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:56:15,433 INFO L85 PathProgramCache]: Analyzing trace with hash -142215703, now seen corresponding path program 2 times [2021-11-21 00:56:15,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:56:15,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705147416] [2021-11-21 00:56:15,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:56:15,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:56:15,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:56:15,620 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:56:15,620 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:56:15,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705147416] [2021-11-21 00:56:15,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705147416] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:56:15,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978091698] [2021-11-21 00:56:15,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:56:15,621 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:56:15,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:56:15,622 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:56:15,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 00:56:15,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-21 00:56:15,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:56:15,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-21 00:56:15,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:56:15,751 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:56:15,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:56:15,861 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:56:15,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978091698] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:56:15,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [407573144] [2021-11-21 00:56:15,865 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-21 00:56:15,865 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:56:15,865 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:56:15,865 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:56:15,866 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:56:16,572 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:56:16,726 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:56:16,726 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:56:16,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2021-11-21 00:56:16,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285920513] [2021-11-21 00:56:16,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:56:16,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-21 00:56:16,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:56:16,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-21 00:56:16,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-11-21 00:56:16,729 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 16 states, 16 states have (on average 1.1875) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:56:16,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:56:16,857 INFO L93 Difference]: Finished difference Result 16 states and 19 transitions. [2021-11-21 00:56:16,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-21 00:56:16,858 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.1875) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-21 00:56:16,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:56:16,858 INFO L225 Difference]: With dead ends: 16 [2021-11-21 00:56:16,859 INFO L226 Difference]: Without dead ends: 13 [2021-11-21 00:56:16,859 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2021-11-21 00:56:16,860 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:56:16,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:56:16,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-11-21 00:56:16,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-11-21 00:56:16,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 12 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:56:16,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2021-11-21 00:56:16,869 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 8 [2021-11-21 00:56:16,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:56:16,871 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2021-11-21 00:56:16,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.1875) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:56:16,872 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2021-11-21 00:56:16,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-21 00:56:16,872 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:56:16,872 INFO L514 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1] [2021-11-21 00:56:16,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-21 00:56:17,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:56:17,092 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:56:17,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:56:17,093 INFO L85 PathProgramCache]: Analyzing trace with hash -361503255, now seen corresponding path program 3 times [2021-11-21 00:56:17,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:56:17,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783734039] [2021-11-21 00:56:17,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:56:17,093 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:56:17,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-21 00:56:17,127 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-21 00:56:17,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-21 00:56:17,184 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-21 00:56:17,184 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-21 00:56:17,185 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-21 00:56:17,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-21 00:56:17,191 INFO L732 BasicCegarLoop]: Path program histogram: [3, 1] [2021-11-21 00:56:17,194 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-21 00:56:17,224 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.11 12:56:17 BoogieIcfgContainer [2021-11-21 00:56:17,224 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-21 00:56:17,225 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-21 00:56:17,225 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-21 00:56:17,225 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-21 00:56:17,226 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:56:13" (3/4) ... [2021-11-21 00:56:17,229 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-21 00:56:17,229 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-21 00:56:17,230 INFO L158 Benchmark]: Toolchain (without parser) took 4492.23ms. Allocated memory was 115.3MB in the beginning and 155.2MB in the end (delta: 39.8MB). Free memory was 85.1MB in the beginning and 104.6MB in the end (delta: -19.6MB). Peak memory consumption was 19.5MB. Max. memory is 16.1GB. [2021-11-21 00:56:17,230 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 115.3MB. Free memory is still 67.8MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-21 00:56:17,231 INFO L158 Benchmark]: CACSL2BoogieTranslator took 285.31ms. Allocated memory is still 115.3MB. Free memory was 84.8MB in the beginning and 89.3MB in the end (delta: -4.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-21 00:56:17,231 INFO L158 Benchmark]: Boogie Procedure Inliner took 31.33ms. Allocated memory is still 115.3MB. Free memory was 89.3MB in the beginning and 87.6MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-21 00:56:17,232 INFO L158 Benchmark]: Boogie Preprocessor took 18.04ms. Allocated memory is still 115.3MB. Free memory was 87.6MB in the beginning and 86.8MB in the end (delta: 832.4kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-21 00:56:17,232 INFO L158 Benchmark]: RCFGBuilder took 227.91ms. Allocated memory is still 115.3MB. Free memory was 86.8MB in the beginning and 77.6MB in the end (delta: 9.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-21 00:56:17,233 INFO L158 Benchmark]: TraceAbstraction took 3913.92ms. Allocated memory was 115.3MB in the beginning and 155.2MB in the end (delta: 39.8MB). Free memory was 76.8MB in the beginning and 104.6MB in the end (delta: -27.9MB). Peak memory consumption was 14.0MB. Max. memory is 16.1GB. [2021-11-21 00:56:17,233 INFO L158 Benchmark]: Witness Printer took 4.26ms. Allocated memory is still 155.2MB. Free memory is still 104.6MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-21 00:56:17,235 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 115.3MB. Free memory is still 67.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 285.31ms. Allocated memory is still 115.3MB. Free memory was 84.8MB in the beginning and 89.3MB in the end (delta: -4.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 31.33ms. Allocated memory is still 115.3MB. Free memory was 89.3MB in the beginning and 87.6MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 18.04ms. Allocated memory is still 115.3MB. Free memory was 87.6MB in the beginning and 86.8MB in the end (delta: 832.4kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 227.91ms. Allocated memory is still 115.3MB. Free memory was 86.8MB in the beginning and 77.6MB in the end (delta: 9.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 3913.92ms. Allocated memory was 115.3MB in the beginning and 155.2MB in the end (delta: 39.8MB). Free memory was 76.8MB in the beginning and 104.6MB in the end (delta: -27.9MB). Peak memory consumption was 14.0MB. Max. memory is 16.1GB. * Witness Printer took 4.26ms. Allocated memory is still 155.2MB. Free memory is still 104.6MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 16]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of shiftLeft at line 32, overapproximation of bitwiseAnd at line 33. Possible FailurePath: [L24] unsigned char x; [L25] unsigned char y; [L26] unsigned char c; [L28] x = 37 [L29] y = 0 [L30] c = 0 VAL [c=0, x=37, y=0] [L31] COND TRUE c < (unsigned char)8 [L32] unsigned char i = ((unsigned char)1) << c; [L33] unsigned char bit = x & i; [L34] COND FALSE !(bit != (unsigned char)0) [L37] c = c + ((unsigned char)1) VAL [bit=0, c=1, i=0, x=37, y=0] [L31] COND TRUE c < (unsigned char)8 [L32] unsigned char i = ((unsigned char)1) << c; [L33] unsigned char bit = x & i; [L34] COND TRUE bit != (unsigned char)0 [L35] y = y + i [L37] c = c + ((unsigned char)1) VAL [bit=1, c=2, i=0, x=37, y=0] [L31] COND TRUE c < (unsigned char)8 [L32] unsigned char i = ((unsigned char)1) << c; [L33] unsigned char bit = x & i; [L34] COND TRUE bit != (unsigned char)0 [L35] y = y + i [L37] c = c + ((unsigned char)1) VAL [bit=1, c=3, i=0, x=37, y=0] [L31] COND TRUE c < (unsigned char)8 [L32] unsigned char i = ((unsigned char)1) << c; [L33] unsigned char bit = x & i; [L34] COND TRUE bit != (unsigned char)0 [L35] y = y + i [L37] c = c + ((unsigned char)1) VAL [bit=1, c=4, i=0, x=37, y=0] [L31] COND TRUE c < (unsigned char)8 [L32] unsigned char i = ((unsigned char)1) << c; [L33] unsigned char bit = x & i; [L34] COND TRUE bit != (unsigned char)0 [L35] y = y + i [L37] c = c + ((unsigned char)1) VAL [bit=1, c=5, i=0, x=37, y=0] [L31] COND TRUE c < (unsigned char)8 [L32] unsigned char i = ((unsigned char)1) << c; [L33] unsigned char bit = x & i; [L34] COND TRUE bit != (unsigned char)0 [L35] y = y + i [L37] c = c + ((unsigned char)1) VAL [bit=1, c=6, i=0, x=37, y=0] [L31] COND TRUE c < (unsigned char)8 [L32] unsigned char i = ((unsigned char)1) << c; [L33] unsigned char bit = x & i; [L34] COND TRUE bit != (unsigned char)0 [L35] y = y + i [L37] c = c + ((unsigned char)1) VAL [bit=1, c=7, i=0, x=37, y=0] [L31] COND TRUE c < (unsigned char)8 [L32] unsigned char i = ((unsigned char)1) << c; [L33] unsigned char bit = x & i; [L34] COND FALSE !(bit != (unsigned char)0) [L37] c = c + ((unsigned char)1) VAL [bit=0, c=8, i=0, x=37, y=0] [L31] COND FALSE !(c < (unsigned char)8) [L39] CALL __VERIFIER_assert(x == y) [L15] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L16] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 3.8s, OverallIterations: 4, TraceHistogramMax: 8, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 0 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 32 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 26 mSDsCounter, 10 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 62 IncrementalHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 10 mSolverCounterUnsat, 7 mSDtfsCounter, 62 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=13occurred in iteration=3, InterpolantAutomatonStates: 19, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 42 NumberOfCodeBlocks, 42 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 36 ConstructedInterpolants, 0 QuantifiedInterpolants, 180 SizeOfPredicates, 3 NumberOfNonLiveVariables, 98 ConjunctsInSsa, 18 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 0/33 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-11-21 00:56:17,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/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_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/num_conversion_1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P --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 bdb7543d1c240ce49edc036e26416805e34b577c5ba56fd044d3b26828ca42a8 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 00:56:19,761 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 00:56:19,763 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 00:56:19,809 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 00:56:19,810 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 00:56:19,814 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 00:56:19,816 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 00:56:19,820 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 00:56:19,823 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 00:56:19,831 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 00:56:19,832 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 00:56:19,834 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 00:56:19,834 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 00:56:19,837 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 00:56:19,839 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 00:56:19,845 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 00:56:19,847 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 00:56:19,849 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 00:56:19,852 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 00:56:19,863 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 00:56:19,865 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 00:56:19,867 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 00:56:19,869 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 00:56:19,872 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 00:56:19,882 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 00:56:19,882 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 00:56:19,883 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 00:56:19,885 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 00:56:19,886 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 00:56:19,887 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 00:56:19,887 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 00:56:19,888 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 00:56:19,890 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 00:56:19,891 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 00:56:19,893 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 00:56:19,893 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 00:56:19,894 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 00:56:19,895 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 00:56:19,895 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 00:56:19,897 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 00:56:19,898 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 00:56:19,898 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-21 00:56:19,942 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 00:56:19,942 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 00:56:19,942 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 00:56:19,943 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 00:56:19,943 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 00:56:19,944 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 00:56:19,944 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 00:56:19,944 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 00:56:19,944 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 00:56:19,945 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 00:56:19,945 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 00:56:19,945 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 00:56:19,946 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 00:56:19,946 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 00:56:19,946 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 00:56:19,947 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 00:56:19,947 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 00:56:19,947 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 00:56:19,947 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 00:56:19,947 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-21 00:56:19,948 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-21 00:56:19,948 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 00:56:19,948 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 00:56:19,948 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 00:56:19,949 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 00:56:19,949 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 00:56:19,949 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-21 00:56:19,949 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 00:56:19,949 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:56:19,950 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 00:56:19,950 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 00:56:19,950 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 00:56:19,950 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-21 00:56:19,951 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-21 00:56:19,951 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 00:56:19,951 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 00:56:19,951 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 00:56:19,952 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_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bdb7543d1c240ce49edc036e26416805e34b577c5ba56fd044d3b26828ca42a8 [2021-11-21 00:56:20,332 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 00:56:20,360 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 00:56:20,363 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 00:56:20,365 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 00:56:20,366 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 00:56:20,367 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/bitvector/num_conversion_1.c [2021-11-21 00:56:20,432 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/data/c5bb7b701/15ed60dacc704b9989783dda9b46d3e6/FLAG3feb0b2b2 [2021-11-21 00:56:21,011 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 00:56:21,012 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/sv-benchmarks/c/bitvector/num_conversion_1.c [2021-11-21 00:56:21,019 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/data/c5bb7b701/15ed60dacc704b9989783dda9b46d3e6/FLAG3feb0b2b2 [2021-11-21 00:56:21,360 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/data/c5bb7b701/15ed60dacc704b9989783dda9b46d3e6 [2021-11-21 00:56:21,366 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 00:56:21,367 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 00:56:21,371 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 00:56:21,372 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 00:56:21,376 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 00:56:21,377 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:56:21" (1/1) ... [2021-11-21 00:56:21,380 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e8d9941 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:56:21, skipping insertion in model container [2021-11-21 00:56:21,381 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:56:21" (1/1) ... [2021-11-21 00:56:21,391 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 00:56:21,407 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 00:56:21,561 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_ed2dfded-0d06-4616-aa52-04ec74c44d35/sv-benchmarks/c/bitvector/num_conversion_1.c[673,686] [2021-11-21 00:56:21,590 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:56:21,604 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 00:56:21,664 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_ed2dfded-0d06-4616-aa52-04ec74c44d35/sv-benchmarks/c/bitvector/num_conversion_1.c[673,686] [2021-11-21 00:56:21,673 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:56:21,693 INFO L208 MainTranslator]: Completed translation [2021-11-21 00:56:21,693 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:56:21 WrapperNode [2021-11-21 00:56:21,694 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 00:56:21,695 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 00:56:21,695 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 00:56:21,695 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 00:56:21,702 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:56:21" (1/1) ... [2021-11-21 00:56:21,711 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:56:21" (1/1) ... [2021-11-21 00:56:21,731 INFO L137 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 34 [2021-11-21 00:56:21,732 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 00:56:21,733 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 00:56:21,733 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 00:56:21,734 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 00:56:21,743 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:56:21" (1/1) ... [2021-11-21 00:56:21,744 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:56:21" (1/1) ... [2021-11-21 00:56:21,764 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:56:21" (1/1) ... [2021-11-21 00:56:21,764 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:56:21" (1/1) ... [2021-11-21 00:56:21,770 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:56:21" (1/1) ... [2021-11-21 00:56:21,775 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:56:21" (1/1) ... [2021-11-21 00:56:21,785 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:56:21" (1/1) ... [2021-11-21 00:56:21,787 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 00:56:21,789 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 00:56:21,790 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 00:56:21,791 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 00:56:21,792 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:56:21" (1/1) ... [2021-11-21 00:56:21,804 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:56:21,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:56:21,837 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 00:56:21,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 00:56:21,890 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 00:56:21,890 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 00:56:21,890 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 00:56:21,891 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-21 00:56:21,973 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 00:56:21,975 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 00:56:22,130 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 00:56:22,138 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 00:56:22,139 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-21 00:56:22,141 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:56:22 BoogieIcfgContainer [2021-11-21 00:56:22,141 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 00:56:22,144 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 00:56:22,144 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 00:56:22,148 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 00:56:22,149 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 12:56:21" (1/3) ... [2021-11-21 00:56:22,150 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3aa500a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:56:22, skipping insertion in model container [2021-11-21 00:56:22,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:56:21" (2/3) ... [2021-11-21 00:56:22,151 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3aa500a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:56:22, skipping insertion in model container [2021-11-21 00:56:22,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:56:22" (3/3) ... [2021-11-21 00:56:22,153 INFO L111 eAbstractionObserver]: Analyzing ICFG num_conversion_1.c [2021-11-21 00:56:22,159 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 00:56:22,159 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 00:56:22,231 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 00:56:22,244 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 [2021-11-21 00:56:22,245 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 00:56:22,270 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:56:22,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-21 00:56:22,279 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:56:22,280 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-21 00:56:22,281 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:56:22,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:56:22,291 INFO L85 PathProgramCache]: Analyzing trace with hash 889968487, now seen corresponding path program 1 times [2021-11-21 00:56:22,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:56:22,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [853226374] [2021-11-21 00:56:22,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:56:22,305 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:56:22,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:56:22,308 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:56:22,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-21 00:56:22,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:56:22,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-21 00:56:22,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:56:22,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:56:22,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:56:22,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:56:22,506 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:56:22,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [853226374] [2021-11-21 00:56:22,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [853226374] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:56:22,512 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:56:22,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-21 00:56:22,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642666393] [2021-11-21 00:56:22,515 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:56:22,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-21 00:56:22,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:56:22,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-21 00:56:22,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-21 00:56:22,553 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 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 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:56:22,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:56:22,567 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2021-11-21 00:56:22,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-21 00:56:22,570 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2021-11-21 00:56:22,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:56:22,579 INFO L225 Difference]: With dead ends: 21 [2021-11-21 00:56:22,580 INFO L226 Difference]: Without dead ends: 9 [2021-11-21 00:56:22,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-21 00:56:22,591 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:56:22,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:56:22,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-11-21 00:56:22,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-11-21 00:56:22,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:56:22,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2021-11-21 00:56:22,635 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2021-11-21 00:56:22,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:56:22,637 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2021-11-21 00:56:22,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:56:22,637 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2021-11-21 00:56:22,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-21 00:56:22,638 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:56:22,639 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-21 00:56:22,656 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-21 00:56:22,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:56:22,849 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:56:22,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:56:22,850 INFO L85 PathProgramCache]: Analyzing trace with hash 889640786, now seen corresponding path program 1 times [2021-11-21 00:56:22,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:56:22,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1150581487] [2021-11-21 00:56:22,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:56:22,851 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:56:22,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:56:22,853 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:56:22,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-21 00:56:22,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:56:22,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-21 00:56:22,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:56:22,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:56:22,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:56:23,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:56:23,026 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:56:23,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1150581487] [2021-11-21 00:56:23,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1150581487] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:56:23,027 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:56:23,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-21 00:56:23,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697251772] [2021-11-21 00:56:23,028 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:56:23,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:56:23,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:56:23,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:56:23,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:56:23,031 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:56:23,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:56:23,054 INFO L93 Difference]: Finished difference Result 17 states and 20 transitions. [2021-11-21 00:56:23,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:56:23,055 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-21 00:56:23,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:56:23,056 INFO L225 Difference]: With dead ends: 17 [2021-11-21 00:56:23,056 INFO L226 Difference]: Without dead ends: 13 [2021-11-21 00:56:23,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:56:23,058 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 9 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:56:23,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 14 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:56:23,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-11-21 00:56:23,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-11-21 00:56:23,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:56:23,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2021-11-21 00:56:23,065 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 6 [2021-11-21 00:56:23,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:56:23,066 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2021-11-21 00:56:23,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:56:23,066 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2021-11-21 00:56:23,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-21 00:56:23,067 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:56:23,067 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-21 00:56:23,081 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-21 00:56:23,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:56:23,280 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:56:23,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:56:23,281 INFO L85 PathProgramCache]: Analyzing trace with hash -1950053902, now seen corresponding path program 1 times [2021-11-21 00:56:23,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:56:23,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2116272730] [2021-11-21 00:56:23,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:56:23,282 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:56:23,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:56:23,283 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:56:23,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-21 00:56:23,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:56:23,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 00:56:23,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:56:23,390 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 00:56:23,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:56:23,450 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 00:56:23,450 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:56:23,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2116272730] [2021-11-21 00:56:23,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2116272730] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:56:23,451 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:56:23,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-21 00:56:23,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219536305] [2021-11-21 00:56:23,452 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:56:23,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 00:56:23,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:56:23,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 00:56:23,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:56:23,454 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:56:23,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:56:23,503 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2021-11-21 00:56:23,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:56:23,504 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-21 00:56:23,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:56:23,504 INFO L225 Difference]: With dead ends: 28 [2021-11-21 00:56:23,505 INFO L226 Difference]: Without dead ends: 19 [2021-11-21 00:56:23,505 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-21 00:56:23,507 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 8 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:56:23,508 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 43 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:56:23,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-21 00:56:23,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 13. [2021-11-21 00:56:23,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:56:23,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-11-21 00:56:23,513 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 12 [2021-11-21 00:56:23,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:56:23,514 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-11-21 00:56:23,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:56:23,514 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2021-11-21 00:56:23,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-21 00:56:23,515 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:56:23,515 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:56:23,529 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-21 00:56:23,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:56:23,726 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:56:23,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:56:23,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1664855024, now seen corresponding path program 1 times [2021-11-21 00:56:23,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:56:23,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1846127278] [2021-11-21 00:56:23,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:56:23,729 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:56:23,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:56:23,730 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:56:23,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:56:23,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 00:56:23,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:56:23,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-21 00:56:23,854 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:56:23,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:56:23,954 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:56:23,954 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:56:23,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1846127278] [2021-11-21 00:56:23,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1846127278] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:56:23,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1816235797] [2021-11-21 00:56:23,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:56:23,955 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 00:56:23,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 00:56:23,958 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 00:56:23,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2021-11-21 00:56:24,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:56:24,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 00:56:24,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:56:24,072 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:56:24,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:56:24,138 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:56:24,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1816235797] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:56:24,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801434362] [2021-11-21 00:56:24,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:56:24,140 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:56:24,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:56:24,158 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:56:24,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-21 00:56:24,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:56:24,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 00:56:24,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:56:24,304 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:56:24,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:56:24,405 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:56:24,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801434362] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:56:24,406 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 00:56:24,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 6] total 10 [2021-11-21 00:56:24,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599041678] [2021-11-21 00:56:24,407 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 00:56:24,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-21 00:56:24,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:56:24,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-21 00:56:24,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-11-21 00:56:24,410 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:56:24,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:56:24,516 INFO L93 Difference]: Finished difference Result 29 states and 37 transitions. [2021-11-21 00:56:24,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-21 00:56:24,520 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-21 00:56:24,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:56:24,522 INFO L225 Difference]: With dead ends: 29 [2021-11-21 00:56:24,523 INFO L226 Difference]: Without dead ends: 25 [2021-11-21 00:56:24,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-11-21 00:56:24,532 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 43 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:56:24,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 42 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:56:24,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-21 00:56:24,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-11-21 00:56:24,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.25) internal successors, (30), 24 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:56:24,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2021-11-21 00:56:24,549 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 12 [2021-11-21 00:56:24,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:56:24,550 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2021-11-21 00:56:24,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:56:24,550 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2021-11-21 00:56:24,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-21 00:56:24,551 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:56:24,551 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:56:24,590 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-21 00:56:24,763 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-21 00:56:24,957 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (6)] Ended with exit code 0 [2021-11-21 00:56:25,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt [2021-11-21 00:56:25,153 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:56:25,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:56:25,154 INFO L85 PathProgramCache]: Analyzing trace with hash 2085526576, now seen corresponding path program 2 times [2021-11-21 00:56:25,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:56:25,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1250067858] [2021-11-21 00:56:25,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 00:56:25,155 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:56:25,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:56:25,162 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:56:25,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-21 00:56:25,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 00:56:25,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:56:25,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-21 00:56:25,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:56:25,336 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 29 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 00:56:25,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:56:25,491 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 29 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 00:56:25,492 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:56:25,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1250067858] [2021-11-21 00:56:25,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1250067858] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:56:25,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1792475645] [2021-11-21 00:56:25,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 00:56:25,493 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 00:56:25,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 00:56:25,496 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 00:56:25,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-21 00:56:25,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 00:56:25,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:56:25,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-21 00:56:25,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:56:25,702 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 29 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 00:56:25,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:56:25,795 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 29 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 00:56:25,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1792475645] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:56:25,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254128358] [2021-11-21 00:56:25,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 00:56:25,797 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:56:25,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:56:25,798 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:56:25,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-21 00:56:25,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 00:56:25,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:56:25,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 00:56:25,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:56:25,943 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 29 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 00:56:25,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:56:26,145 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 29 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 00:56:26,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254128358] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:56:26,146 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 00:56:26,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 13 [2021-11-21 00:56:26,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708804751] [2021-11-21 00:56:26,147 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 00:56:26,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-21 00:56:26,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:56:26,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-21 00:56:26,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-11-21 00:56:26,153 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:56:26,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:56:26,464 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2021-11-21 00:56:26,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-21 00:56:26,465 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-21 00:56:26,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:56:26,466 INFO L225 Difference]: With dead ends: 54 [2021-11-21 00:56:26,466 INFO L226 Difference]: Without dead ends: 39 [2021-11-21 00:56:26,467 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2021-11-21 00:56:26,467 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 25 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:56:26,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 51 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:56:26,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-11-21 00:56:26,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2021-11-21 00:56:26,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:56:26,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2021-11-21 00:56:26,482 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 24 [2021-11-21 00:56:26,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:56:26,482 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2021-11-21 00:56:26,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:56:26,483 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2021-11-21 00:56:26,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-21 00:56:26,485 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:56:26,486 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1] [2021-11-21 00:56:26,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-11-21 00:56:26,695 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-21 00:56:26,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-21 00:56:27,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:56:27,089 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:56:27,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:56:27,090 INFO L85 PathProgramCache]: Analyzing trace with hash -986835344, now seen corresponding path program 3 times [2021-11-21 00:56:27,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:56:27,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1032972452] [2021-11-21 00:56:27,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:56:27,090 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:56:27,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:56:27,095 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:56:27,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-21 00:56:27,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-21 00:56:27,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:56:27,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-21 00:56:27,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:56:27,297 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-21 00:56:27,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:56:27,687 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-21 00:56:27,687 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:56:27,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1032972452] [2021-11-21 00:56:27,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1032972452] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:56:27,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1785967409] [2021-11-21 00:56:27,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:56:27,697 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 00:56:27,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 00:56:27,700 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 00:56:27,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-21 00:56:27,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-21 00:56:27,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:56:27,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-21 00:56:27,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:56:27,900 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-21 00:56:27,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:56:28,169 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-21 00:56:28,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1785967409] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:56:28,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217160384] [2021-11-21 00:56:28,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:56:28,170 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:56:28,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:56:28,172 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:56:28,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-21 00:56:28,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-21 00:56:28,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:56:28,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-21 00:56:28,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:56:28,330 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-21 00:56:28,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:56:28,584 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-21 00:56:28,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217160384] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:56:28,584 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 00:56:28,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 10 [2021-11-21 00:56:28,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792369525] [2021-11-21 00:56:28,585 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 00:56:28,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-21 00:56:28,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:56:28,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-21 00:56:28,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-21 00:56:28,589 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:56:28,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:56:28,699 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2021-11-21 00:56:28,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 00:56:28,700 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-21 00:56:28,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:56:28,701 INFO L225 Difference]: With dead ends: 38 [2021-11-21 00:56:28,701 INFO L226 Difference]: Without dead ends: 34 [2021-11-21 00:56:28,701 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 130 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-11-21 00:56:28,702 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 16 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:56:28,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 13 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 17 Invalid, 0 Unknown, 4 Unchecked, 0.0s Time] [2021-11-21 00:56:28,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-11-21 00:56:28,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 28. [2021-11-21 00:56:28,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:56:28,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2021-11-21 00:56:28,713 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 24 [2021-11-21 00:56:28,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:56:28,713 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2021-11-21 00:56:28,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:56:28,716 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2021-11-21 00:56:28,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-21 00:56:28,717 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:56:28,717 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 4, 3, 1, 1, 1, 1, 1, 1] [2021-11-21 00:56:28,736 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-21 00:56:28,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-11-21 00:56:29,160 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-11-21 00:56:29,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:56:29,337 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:56:29,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:56:29,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1835661531, now seen corresponding path program 4 times [2021-11-21 00:56:29,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:56:29,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1682072763] [2021-11-21 00:56:29,338 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 00:56:29,338 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:56:29,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:56:29,339 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:56:29,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-21 00:56:29,370 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 00:56:29,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:56:29,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-21 00:56:29,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:56:29,494 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:56:29,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:56:29,708 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:56:29,708 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:56:29,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1682072763] [2021-11-21 00:56:29,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1682072763] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:56:29,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [634164487] [2021-11-21 00:56:29,709 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 00:56:29,709 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 00:56:29,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 00:56:29,710 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 00:56:29,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-21 00:56:29,788 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 00:56:29,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:56:29,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-21 00:56:29,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:56:29,866 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:56:29,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:56:29,952 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:56:29,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [634164487] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:56:29,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839789002] [2021-11-21 00:56:29,952 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 00:56:29,953 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:56:29,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:56:29,954 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:56:29,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-21 00:56:30,003 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 00:56:30,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:56:30,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-21 00:56:30,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:56:30,086 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:56:30,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:56:30,486 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:56:30,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839789002] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:56:30,490 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 00:56:30,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 10, 11] total 25 [2021-11-21 00:56:30,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467147514] [2021-11-21 00:56:30,491 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 00:56:30,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-21 00:56:30,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:56:30,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-21 00:56:30,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=440, Unknown=0, NotChecked=0, Total=600 [2021-11-21 00:56:30,494 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 25 states, 25 states have (on average 2.8) internal successors, (70), 25 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:56:30,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:56:30,704 INFO L93 Difference]: Finished difference Result 67 states and 84 transitions. [2021-11-21 00:56:30,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-21 00:56:30,705 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.8) internal successors, (70), 25 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-21 00:56:30,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:56:30,707 INFO L225 Difference]: With dead ends: 67 [2021-11-21 00:56:30,707 INFO L226 Difference]: Without dead ends: 63 [2021-11-21 00:56:30,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=171, Invalid=479, Unknown=0, NotChecked=0, Total=650 [2021-11-21 00:56:30,709 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 113 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:56:30,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 150 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:56:30,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-11-21 00:56:30,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 49. [2021-11-21 00:56:30,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.25) internal successors, (60), 48 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:56:30,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 60 transitions. [2021-11-21 00:56:30,721 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 60 transitions. Word has length 27 [2021-11-21 00:56:30,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:56:30,722 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 60 transitions. [2021-11-21 00:56:30,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.8) internal successors, (70), 25 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:56:30,723 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 60 transitions. [2021-11-21 00:56:30,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-21 00:56:30,724 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:56:30,724 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 5, 3, 1, 1, 1, 1, 1, 1] [2021-11-21 00:56:30,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-21 00:56:30,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-21 00:56:31,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-21 00:56:31,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt [2021-11-21 00:56:31,345 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:56:31,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:56:31,346 INFO L85 PathProgramCache]: Analyzing trace with hash -29656432, now seen corresponding path program 5 times [2021-11-21 00:56:31,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:56:31,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1441543758] [2021-11-21 00:56:31,346 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-21 00:56:31,346 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:56:31,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:56:31,347 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:56:31,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-21 00:56:31,404 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-11-21 00:56:31,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:56:31,406 WARN L261 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-21 00:56:31,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:56:33,184 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:56:33,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:56:38,076 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 7 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:56:38,076 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:56:38,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1441543758] [2021-11-21 00:56:38,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1441543758] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:56:38,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1016004832] [2021-11-21 00:56:38,077 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-21 00:56:38,077 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 00:56:38,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 00:56:38,087 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 00:56:38,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-21 00:56:38,179 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-11-21 00:56:38,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:56:38,183 WARN L261 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-21 00:56:38,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:56:38,886 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:56:38,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:56:39,875 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 7 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:56:39,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1016004832] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:56:39,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194812600] [2021-11-21 00:56:39,876 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-21 00:56:39,876 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:56:39,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:56:39,877 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:56:39,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-21 00:56:39,918 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-11-21 00:56:39,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:56:39,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-21 00:56:39,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:56:40,985 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:56:40,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:56:43,501 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 7 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:56:43,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194812600] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:56:43,501 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 00:56:43,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27, 27, 19, 23] total 86 [2021-11-21 00:56:43,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767046771] [2021-11-21 00:56:43,502 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 00:56:43,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2021-11-21 00:56:43,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:56:43,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-11-21 00:56:43,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1217, Invalid=6093, Unknown=0, NotChecked=0, Total=7310 [2021-11-21 00:56:43,508 INFO L87 Difference]: Start difference. First operand 49 states and 60 transitions. Second operand has 86 states, 86 states have (on average 1.2325581395348837) internal successors, (106), 86 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:56:45,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:56:45,969 INFO L93 Difference]: Finished difference Result 97 states and 122 transitions. [2021-11-21 00:56:45,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-21 00:56:45,970 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 1.2325581395348837) internal successors, (106), 86 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-21 00:56:45,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:56:45,970 INFO L225 Difference]: With dead ends: 97 [2021-11-21 00:56:45,970 INFO L226 Difference]: Without dead ends: 0 [2021-11-21 00:56:45,975 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 93 SyntacticMatches, 3 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3749 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=1877, Invalid=8425, Unknown=0, NotChecked=0, Total=10302 [2021-11-21 00:56:45,976 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 248 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 320 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 1002 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 320 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-21 00:56:45,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 33 Invalid, 1002 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [320 Valid, 669 Invalid, 0 Unknown, 13 Unchecked, 0.7s Time] [2021-11-21 00:56:45,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-21 00:56:45,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-21 00:56:45,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:56:45,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-21 00:56:45,978 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 30 [2021-11-21 00:56:45,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:56:45,978 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-21 00:56:45,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 1.2325581395348837) internal successors, (106), 86 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:56:45,979 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-21 00:56:45,979 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-21 00:56:45,981 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-21 00:56:45,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-11-21 00:56:46,206 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-21 00:56:46,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-21 00:56:46,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:56:46,585 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-21 00:56:47,391 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-11-21 00:56:47,391 INFO L854 garLoopResultBuilder]: At program point L31-2(lines 31 38) the Hoare annotation is: (let ((.cse9 ((_ zero_extend 24) |ULTIMATE.start_main_~x~0#1|)) (.cse14 ((_ zero_extend 24) |ULTIMATE.start_main_~c~0#1|))) (let ((.cse0 (= ((_ zero_extend 24) |ULTIMATE.start_main_~bit~0#1|) (_ bv0 32))) (.cse11 ((_ zero_extend 24) ((_ extract 7 0) (bvadd ((_ zero_extend 24) ((_ extract 7 0) (bvadd .cse14 (_ bv1 32)))) (_ bv1 32))))) (.cse12 (= |ULTIMATE.start_main_~y~0#1| (_ bv5 8))) (.cse8 ((_ extract 7 0) (bvand .cse9 ((_ zero_extend 24) ((_ extract 7 0) (bvshl (_ bv1 32) .cse14)))))) (.cse6 (= |ULTIMATE.start_main_~y~0#1| (_ bv37 8))) (.cse1 (= |ULTIMATE.start_main_~x~0#1| (_ bv37 8))) (.cse2 (= (_ bv1 8) |ULTIMATE.start_main_~y~0#1|))) (or (and .cse0 (= |ULTIMATE.start_main_~c~0#1| (_ bv2 8)) .cse1 .cse2) (let ((.cse7 ((_ zero_extend 24) ((_ extract 7 0) (bvadd .cse11 (_ bv1 32)))))) (let ((.cse10 ((_ zero_extend 24) ((_ extract 7 0) (bvadd .cse7 (_ bv1 32)))))) (let ((.cse4 ((_ zero_extend 24) ((_ extract 7 0) (bvadd .cse10 (_ bv1 32))))) (.cse5 (bvslt .cse10 (_ bv8 32)))) (and (let ((.cse3 ((_ zero_extend 24) ((_ extract 7 0) (bvadd .cse4 (_ bv1 32)))))) (or (not (bvslt .cse3 (_ bv8 32))) (bvslt ((_ zero_extend 24) ((_ extract 7 0) (bvadd .cse3 (_ bv1 32)))) (_ bv8 32)))) (or (not .cse5) (bvslt .cse4 (_ bv8 32))) .cse6 (or (not (bvslt .cse7 (_ bv8 32))) .cse5) (= ((_ zero_extend 24) .cse8) (_ bv0 32)) .cse1 (= |ULTIMATE.start_main_~bit~0#1| ((_ extract 7 0) (bvand .cse9 (_ bv128 32)))))))) (and .cse12 (= |ULTIMATE.start_main_~c~0#1| (_ bv5 8)) (or .cse0 (= ((_ zero_extend 24) ((_ extract 7 0) (bvadd ((_ zero_extend 24) |ULTIMATE.start_main_~y~0#1|) ((_ zero_extend 24) |ULTIMATE.start_main_~i~0#1|)))) .cse9)) .cse1) (and .cse12 (not (= ((_ zero_extend 24) ((_ extract 7 0) (bvand .cse9 ((_ zero_extend 24) ((_ extract 7 0) (bvshl (_ bv1 32) .cse11)))))) (_ bv0 32))) (exists ((|v_ULTIMATE.start_main_~c~0#1_54| (_ BitVec 8))) (let ((.cse13 ((_ zero_extend 24) |v_ULTIMATE.start_main_~c~0#1_54|))) (and (not (= ((_ zero_extend 24) ((_ extract 7 0) (bvand (_ bv37 32) ((_ zero_extend 24) ((_ extract 7 0) (bvshl (_ bv1 32) .cse13)))))) (_ bv0 32))) (= |ULTIMATE.start_main_~c~0#1| ((_ extract 7 0) (bvadd .cse13 (_ bv1 32))))))) (= (_ bv4 8) |ULTIMATE.start_main_~bit~0#1|) .cse1) (and (= |ULTIMATE.start_main_~y~0#1| (_ bv0 8)) (= |ULTIMATE.start_main_~c~0#1| (_ bv0 8)) .cse1) (and .cse12 (= |ULTIMATE.start_main_~bit~0#1| .cse8) (= |ULTIMATE.start_main_~c~0#1| (_ bv4 8)) .cse1) (and (= (_ bv6 8) |ULTIMATE.start_main_~c~0#1|) .cse6 .cse1) (and (= (_ bv1 8) |ULTIMATE.start_main_~c~0#1|) (= (_ bv1 8) |ULTIMATE.start_main_~bit~0#1|) .cse1 .cse2)))) [2021-11-21 00:56:47,391 INFO L858 garLoopResultBuilder]: For program point L31-3(lines 31 38) no Hoare annotation was computed. [2021-11-21 00:56:47,392 INFO L858 garLoopResultBuilder]: For program point L15(lines 15 17) no Hoare annotation was computed. [2021-11-21 00:56:47,392 INFO L861 garLoopResultBuilder]: At program point L15-2(lines 14 19) the Hoare annotation is: true [2021-11-21 00:56:47,392 INFO L858 garLoopResultBuilder]: For program point L34(lines 34 36) no Hoare annotation was computed. [2021-11-21 00:56:47,392 INFO L858 garLoopResultBuilder]: For program point L34-2(lines 34 36) no Hoare annotation was computed. [2021-11-21 00:56:47,392 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-11-21 00:56:47,392 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-11-21 00:56:47,392 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-11-21 00:56:47,392 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2021-11-21 00:56:47,392 INFO L858 garLoopResultBuilder]: For program point L16(line 16) no Hoare annotation was computed. [2021-11-21 00:56:47,392 INFO L861 garLoopResultBuilder]: At program point L41(lines 22 42) the Hoare annotation is: true [2021-11-21 00:56:47,395 INFO L732 BasicCegarLoop]: Path program histogram: [5, 1, 1, 1] [2021-11-21 00:56:47,396 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-21 00:56:47,405 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~c~0#1_54,QUANTIFIED] [2021-11-21 00:56:47,406 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~c~0#1_54,QUANTIFIED] [2021-11-21 00:56:47,415 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~c~0#1_54,QUANTIFIED] [2021-11-21 00:56:47,416 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~c~0#1_54,QUANTIFIED] [2021-11-21 00:56:47,418 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.11 12:56:47 BoogieIcfgContainer [2021-11-21 00:56:47,419 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-21 00:56:47,419 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-21 00:56:47,419 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-21 00:56:47,420 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-21 00:56:47,420 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:56:22" (3/4) ... [2021-11-21 00:56:47,423 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-21 00:56:47,432 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2021-11-21 00:56:47,432 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-11-21 00:56:47,432 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-11-21 00:56:47,432 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-21 00:56:47,455 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((((((((~zero_extendFrom8To32(bit) == 0bv32 && c == 2bv8) && x == 37bv8) && 1bv8 == y) || (((((((!~bvslt32(~zero_extendFrom8To32(~bvadd64(~zero_extendFrom8To32(~bvadd64(~zero_extendFrom8To32(~bvadd64(~zero_extendFrom8To32(~bvadd64(~zero_extendFrom8To32(~bvadd64(~zero_extendFrom8To32(~bvadd64(~zero_extendFrom8To32(c), 1bv32)[7:0]), 1bv32)[7:0]), 1bv32)[7:0]), 1bv32)[7:0]), 1bv32)[7:0]), 1bv32)[7:0]), 8bv32) || ~bvslt32(~zero_extendFrom8To32(~bvadd64(~zero_extendFrom8To32(~bvadd64(~zero_extendFrom8To32(~bvadd64(~zero_extendFrom8To32(~bvadd64(~zero_extendFrom8To32(~bvadd64(~zero_extendFrom8To32(~bvadd64(~zero_extendFrom8To32(~bvadd64(~zero_extendFrom8To32(c), 1bv32)[7:0]), 1bv32)[7:0]), 1bv32)[7:0]), 1bv32)[7:0]), 1bv32)[7:0]), 1bv32)[7:0]), 1bv32)[7:0]), 8bv32)) && (!~bvslt32(~zero_extendFrom8To32(~bvadd64(~zero_extendFrom8To32(~bvadd64(~zero_extendFrom8To32(~bvadd64(~zero_extendFrom8To32(~bvadd64(~zero_extendFrom8To32(c), 1bv32)[7:0]), 1bv32)[7:0]), 1bv32)[7:0]), 1bv32)[7:0]), 8bv32) || ~bvslt32(~zero_extendFrom8To32(~bvadd64(~zero_extendFrom8To32(~bvadd64(~zero_extendFrom8To32(~bvadd64(~zero_extendFrom8To32(~bvadd64(~zero_extendFrom8To32(~bvadd64(~zero_extendFrom8To32(c), 1bv32)[7:0]), 1bv32)[7:0]), 1bv32)[7:0]), 1bv32)[7:0]), 1bv32)[7:0]), 8bv32))) && y == 37bv8) && (!~bvslt32(~zero_extendFrom8To32(~bvadd64(~zero_extendFrom8To32(~bvadd64(~zero_extendFrom8To32(~bvadd64(~zero_extendFrom8To32(c), 1bv32)[7:0]), 1bv32)[7:0]), 1bv32)[7:0]), 8bv32) || ~bvslt32(~zero_extendFrom8To32(~bvadd64(~zero_extendFrom8To32(~bvadd64(~zero_extendFrom8To32(~bvadd64(~zero_extendFrom8To32(~bvadd64(~zero_extendFrom8To32(c), 1bv32)[7:0]), 1bv32)[7:0]), 1bv32)[7:0]), 1bv32)[7:0]), 8bv32))) && ~zero_extendFrom8To32(~bvand32(~zero_extendFrom8To32(x), ~zero_extendFrom8To32(~bvshl32(1bv32, ~zero_extendFrom8To32(c))[7:0]))[7:0]) == 0bv32) && x == 37bv8) && bit == ~bvand32(~zero_extendFrom8To32(x), 128bv32)[7:0])) || (((y == 5bv8 && c == 5bv8) && (~zero_extendFrom8To32(bit) == 0bv32 || ~zero_extendFrom8To32(~bvadd64(~zero_extendFrom8To32(y), ~zero_extendFrom8To32(i))[7:0]) == ~zero_extendFrom8To32(x))) && x == 37bv8)) || ((((y == 5bv8 && !(~zero_extendFrom8To32(~bvand32(~zero_extendFrom8To32(x), ~zero_extendFrom8To32(~bvshl32(1bv32, ~zero_extendFrom8To32(~bvadd64(~zero_extendFrom8To32(~bvadd64(~zero_extendFrom8To32(c), 1bv32)[7:0]), 1bv32)[7:0]))[7:0]))[7:0]) == 0bv32)) && (\exists v_ULTIMATE.start_main_~c~0#1_54 : bv8 :: !(~zero_extendFrom8To32(~bvand32(37bv32, ~zero_extendFrom8To32(~bvshl32(1bv32, ~zero_extendFrom8To32(v_ULTIMATE.start_main_~c~0#1_54))[7:0]))[7:0]) == 0bv32) && c == ~bvadd64(~zero_extendFrom8To32(v_ULTIMATE.start_main_~c~0#1_54), 1bv32)[7:0])) && 4bv8 == bit) && x == 37bv8)) || ((y == 0bv8 && c == 0bv8) && x == 37bv8)) || (((y == 5bv8 && bit == ~bvand32(~zero_extendFrom8To32(x), ~zero_extendFrom8To32(~bvshl32(1bv32, ~zero_extendFrom8To32(c))[7:0]))[7:0]) && c == 4bv8) && x == 37bv8)) || ((6bv8 == c && y == 37bv8) && x == 37bv8)) || (((1bv8 == c && 1bv8 == bit) && x == 37bv8) && 1bv8 == y) [2021-11-21 00:56:47,461 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/witness.graphml [2021-11-21 00:56:47,461 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-21 00:56:47,462 INFO L158 Benchmark]: Toolchain (without parser) took 26094.22ms. Allocated memory was 92.3MB in the beginning and 157.3MB in the end (delta: 65.0MB). Free memory was 57.8MB in the beginning and 120.0MB in the end (delta: -62.2MB). Peak memory consumption was 3.9MB. Max. memory is 16.1GB. [2021-11-21 00:56:47,462 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 92.3MB. Free memory is still 74.2MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-21 00:56:47,462 INFO L158 Benchmark]: CACSL2BoogieTranslator took 322.61ms. Allocated memory is still 92.3MB. Free memory was 57.7MB in the beginning and 76.4MB in the end (delta: -18.7MB). Peak memory consumption was 12.4MB. Max. memory is 16.1GB. [2021-11-21 00:56:47,463 INFO L158 Benchmark]: Boogie Procedure Inliner took 37.65ms. Allocated memory is still 92.3MB. Free memory was 76.4MB in the beginning and 74.8MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-21 00:56:47,463 INFO L158 Benchmark]: Boogie Preprocessor took 55.01ms. Allocated memory is still 92.3MB. Free memory was 74.8MB in the beginning and 73.8MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-21 00:56:47,463 INFO L158 Benchmark]: RCFGBuilder took 352.26ms. Allocated memory is still 92.3MB. Free memory was 73.8MB in the beginning and 65.1MB in the end (delta: 8.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-21 00:56:47,464 INFO L158 Benchmark]: TraceAbstraction took 25274.54ms. Allocated memory was 92.3MB in the beginning and 157.3MB in the end (delta: 65.0MB). Free memory was 64.6MB in the beginning and 123.2MB in the end (delta: -58.6MB). Peak memory consumption was 85.8MB. Max. memory is 16.1GB. [2021-11-21 00:56:47,464 INFO L158 Benchmark]: Witness Printer took 41.79ms. Allocated memory is still 157.3MB. Free memory was 123.2MB in the beginning and 120.0MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-21 00:56:47,466 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 92.3MB. Free memory is still 74.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 322.61ms. Allocated memory is still 92.3MB. Free memory was 57.7MB in the beginning and 76.4MB in the end (delta: -18.7MB). Peak memory consumption was 12.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 37.65ms. Allocated memory is still 92.3MB. Free memory was 76.4MB in the beginning and 74.8MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 55.01ms. Allocated memory is still 92.3MB. Free memory was 74.8MB in the beginning and 73.8MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 352.26ms. Allocated memory is still 92.3MB. Free memory was 73.8MB in the beginning and 65.1MB in the end (delta: 8.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 25274.54ms. Allocated memory was 92.3MB in the beginning and 157.3MB in the end (delta: 65.0MB). Free memory was 64.6MB in the beginning and 123.2MB in the end (delta: -58.6MB). Peak memory consumption was 85.8MB. Max. memory is 16.1GB. * Witness Printer took 41.79ms. Allocated memory is still 157.3MB. Free memory was 123.2MB in the beginning and 120.0MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~c~0#1_54,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~c~0#1_54,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~c~0#1_54,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~c~0#1_54,QUANTIFIED] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 16]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 25.2s, OverallIterations: 8, TraceHistogramMax: 8, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 3.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.8s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 462 SdHoareTripleChecker+Valid, 1.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 462 mSDsluCounter, 360 SdHoareTripleChecker+Invalid, 0.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 17 IncrementalHoareTripleChecker+Unchecked, 280 mSDsCounter, 374 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 966 IncrementalHoareTripleChecker+Invalid, 1357 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 374 mSolverCounterUnsat, 80 mSDtfsCounter, 966 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 757 GetRequests, 577 SyntacticMatches, 5 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3914 ImplicationChecksByTransitivity, 10.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=49occurred in iteration=7, InterpolantAutomatonStates: 81, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 39 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 22 NumberOfFragments, 324 HoareAnnotationTreeSize, 3 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 2621 FormulaSimplificationTreeSizeReductionInter, 0.8s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 15.9s InterpolantComputationTime, 375 NumberOfCodeBlocks, 339 NumberOfCodeBlocksAsserted, 51 NumberOfCheckSat, 714 ConstructedInterpolants, 53 QuantifiedInterpolants, 16100 SizeOfPredicates, 90 NumberOfNonLiveVariables, 811 ConjunctsInSsa, 218 ConjunctsInUnsatCore, 36 InterpolantComputations, 6 PerfectInterpolantSequences, 505/1624 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 31]: Loop Invariant [2021-11-21 00:56:47,476 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~c~0#1_54,QUANTIFIED] [2021-11-21 00:56:47,476 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~c~0#1_54,QUANTIFIED] [2021-11-21 00:56:47,478 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~c~0#1_54,QUANTIFIED] [2021-11-21 00:56:47,479 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_~c~0#1_54,QUANTIFIED] Derived loop invariant: (((((((((~zero_extendFrom8To32(bit) == 0bv32 && c == 2bv8) && x == 37bv8) && 1bv8 == y) || (((((((!~bvslt32(~zero_extendFrom8To32(~bvadd64(~zero_extendFrom8To32(~bvadd64(~zero_extendFrom8To32(~bvadd64(~zero_extendFrom8To32(~bvadd64(~zero_extendFrom8To32(~bvadd64(~zero_extendFrom8To32(~bvadd64(~zero_extendFrom8To32(c), 1bv32)[7:0]), 1bv32)[7:0]), 1bv32)[7:0]), 1bv32)[7:0]), 1bv32)[7:0]), 1bv32)[7:0]), 8bv32) || ~bvslt32(~zero_extendFrom8To32(~bvadd64(~zero_extendFrom8To32(~bvadd64(~zero_extendFrom8To32(~bvadd64(~zero_extendFrom8To32(~bvadd64(~zero_extendFrom8To32(~bvadd64(~zero_extendFrom8To32(~bvadd64(~zero_extendFrom8To32(~bvadd64(~zero_extendFrom8To32(c), 1bv32)[7:0]), 1bv32)[7:0]), 1bv32)[7:0]), 1bv32)[7:0]), 1bv32)[7:0]), 1bv32)[7:0]), 1bv32)[7:0]), 8bv32)) && (!~bvslt32(~zero_extendFrom8To32(~bvadd64(~zero_extendFrom8To32(~bvadd64(~zero_extendFrom8To32(~bvadd64(~zero_extendFrom8To32(~bvadd64(~zero_extendFrom8To32(c), 1bv32)[7:0]), 1bv32)[7:0]), 1bv32)[7:0]), 1bv32)[7:0]), 8bv32) || ~bvslt32(~zero_extendFrom8To32(~bvadd64(~zero_extendFrom8To32(~bvadd64(~zero_extendFrom8To32(~bvadd64(~zero_extendFrom8To32(~bvadd64(~zero_extendFrom8To32(~bvadd64(~zero_extendFrom8To32(c), 1bv32)[7:0]), 1bv32)[7:0]), 1bv32)[7:0]), 1bv32)[7:0]), 1bv32)[7:0]), 8bv32))) && y == 37bv8) && (!~bvslt32(~zero_extendFrom8To32(~bvadd64(~zero_extendFrom8To32(~bvadd64(~zero_extendFrom8To32(~bvadd64(~zero_extendFrom8To32(c), 1bv32)[7:0]), 1bv32)[7:0]), 1bv32)[7:0]), 8bv32) || ~bvslt32(~zero_extendFrom8To32(~bvadd64(~zero_extendFrom8To32(~bvadd64(~zero_extendFrom8To32(~bvadd64(~zero_extendFrom8To32(~bvadd64(~zero_extendFrom8To32(c), 1bv32)[7:0]), 1bv32)[7:0]), 1bv32)[7:0]), 1bv32)[7:0]), 8bv32))) && ~zero_extendFrom8To32(~bvand32(~zero_extendFrom8To32(x), ~zero_extendFrom8To32(~bvshl32(1bv32, ~zero_extendFrom8To32(c))[7:0]))[7:0]) == 0bv32) && x == 37bv8) && bit == ~bvand32(~zero_extendFrom8To32(x), 128bv32)[7:0])) || (((y == 5bv8 && c == 5bv8) && (~zero_extendFrom8To32(bit) == 0bv32 || ~zero_extendFrom8To32(~bvadd64(~zero_extendFrom8To32(y), ~zero_extendFrom8To32(i))[7:0]) == ~zero_extendFrom8To32(x))) && x == 37bv8)) || ((((y == 5bv8 && !(~zero_extendFrom8To32(~bvand32(~zero_extendFrom8To32(x), ~zero_extendFrom8To32(~bvshl32(1bv32, ~zero_extendFrom8To32(~bvadd64(~zero_extendFrom8To32(~bvadd64(~zero_extendFrom8To32(c), 1bv32)[7:0]), 1bv32)[7:0]))[7:0]))[7:0]) == 0bv32)) && (\exists v_ULTIMATE.start_main_~c~0#1_54 : bv8 :: !(~zero_extendFrom8To32(~bvand32(37bv32, ~zero_extendFrom8To32(~bvshl32(1bv32, ~zero_extendFrom8To32(v_ULTIMATE.start_main_~c~0#1_54))[7:0]))[7:0]) == 0bv32) && c == ~bvadd64(~zero_extendFrom8To32(v_ULTIMATE.start_main_~c~0#1_54), 1bv32)[7:0])) && 4bv8 == bit) && x == 37bv8)) || ((y == 0bv8 && c == 0bv8) && x == 37bv8)) || (((y == 5bv8 && bit == ~bvand32(~zero_extendFrom8To32(x), ~zero_extendFrom8To32(~bvshl32(1bv32, ~zero_extendFrom8To32(c))[7:0]))[7:0]) && c == 4bv8) && x == 37bv8)) || ((6bv8 == c && y == 37bv8) && x == 37bv8)) || (((1bv8 == c && 1bv8 == bit) && x == 37bv8) && 1bv8 == y) - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2021-11-21 00:56:47,522 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed2dfded-0d06-4616-aa52-04ec74c44d35/bin/utaipan-TEXQjIfE4P/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 Writing output log to file Ultimate.log Result: TRUE