./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/count_up_down-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_d2fa9f26-3187-4da7-ae4d-880d2d046756/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2fa9f26-3187-4da7-ae4d-880d2d046756/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_d2fa9f26-3187-4da7-ae4d-880d2d046756/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2fa9f26-3187-4da7-ae4d-880d2d046756/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops/count_up_down-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2fa9f26-3187-4da7-ae4d-880d2d046756/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_d2fa9f26-3187-4da7-ae4d-880d2d046756/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 5879e48447fc7f125bd26345b332bcb57cae00365c3de30b5785162154970826 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:20:51,376 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:20:51,379 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:20:51,413 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:20:51,414 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:20:51,415 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:20:51,417 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:20:51,419 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:20:51,421 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:20:51,422 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:20:51,424 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:20:51,425 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:20:51,426 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:20:51,427 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:20:51,428 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:20:51,430 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:20:51,431 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:20:51,432 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:20:51,435 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:20:51,438 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:20:51,440 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:20:51,441 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:20:51,443 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:20:51,444 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:20:51,448 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:20:51,448 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:20:51,449 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:20:51,450 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:20:51,451 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:20:51,452 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:20:51,452 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:20:51,453 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:20:51,454 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:20:51,455 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:20:51,457 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:20:51,457 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:20:51,458 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:20:51,459 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:20:51,459 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:20:51,460 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:20:51,461 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:20:51,462 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2fa9f26-3187-4da7-ae4d-880d2d046756/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 01:20:51,489 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:20:51,490 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:20:51,490 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:20:51,491 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:20:51,491 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:20:51,492 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:20:51,492 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:20:51,492 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:20:51,492 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:20:51,493 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 01:20:51,493 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:20:51,493 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:20:51,493 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 01:20:51,494 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 01:20:51,494 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:20:51,494 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 01:20:51,494 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 01:20:51,495 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 01:20:51,495 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:20:51,496 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 01:20:51,496 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:20:51,496 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 01:20:51,496 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:20:51,496 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 01:20:51,497 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:20:51,497 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 01:20:51,497 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 01:20:51,497 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 01:20:51,498 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:20:51,498 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 01:20:51,498 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:20:51,498 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:20:51,498 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:20:51,499 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:20:51,499 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:20:51,499 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 01:20:51,499 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 01:20:51,500 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 01:20:51,500 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 01:20:51,500 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:20:51,500 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:20:51,500 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_d2fa9f26-3187-4da7-ae4d-880d2d046756/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2fa9f26-3187-4da7-ae4d-880d2d046756/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5879e48447fc7f125bd26345b332bcb57cae00365c3de30b5785162154970826 [2021-11-21 01:20:51,753 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:20:51,774 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:20:51,777 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:20:51,778 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:20:51,779 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:20:51,780 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2fa9f26-3187-4da7-ae4d-880d2d046756/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/loops/count_up_down-1.c [2021-11-21 01:20:51,857 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2fa9f26-3187-4da7-ae4d-880d2d046756/bin/utaipan-TEXQjIfE4P/data/499623663/486b97288b9e4bdbb136be7dfda78683/FLAGe7fd345ff [2021-11-21 01:20:52,279 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:20:52,280 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2fa9f26-3187-4da7-ae4d-880d2d046756/sv-benchmarks/c/loops/count_up_down-1.c [2021-11-21 01:20:52,286 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2fa9f26-3187-4da7-ae4d-880d2d046756/bin/utaipan-TEXQjIfE4P/data/499623663/486b97288b9e4bdbb136be7dfda78683/FLAGe7fd345ff [2021-11-21 01:20:52,674 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2fa9f26-3187-4da7-ae4d-880d2d046756/bin/utaipan-TEXQjIfE4P/data/499623663/486b97288b9e4bdbb136be7dfda78683 [2021-11-21 01:20:52,676 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:20:52,678 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:20:52,680 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:20:52,680 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:20:52,683 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:20:52,684 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:20:52" (1/1) ... [2021-11-21 01:20:52,685 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b6156c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:20:52, skipping insertion in model container [2021-11-21 01:20:52,685 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:20:52" (1/1) ... [2021-11-21 01:20:52,692 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:20:52,703 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:20:52,854 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_d2fa9f26-3187-4da7-ae4d-880d2d046756/sv-benchmarks/c/loops/count_up_down-1.c[327,340] [2021-11-21 01:20:52,872 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:20:52,885 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:20:52,897 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_d2fa9f26-3187-4da7-ae4d-880d2d046756/sv-benchmarks/c/loops/count_up_down-1.c[327,340] [2021-11-21 01:20:52,899 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:20:52,912 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:20:52,913 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:20:52 WrapperNode [2021-11-21 01:20:52,913 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:20:52,914 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:20:52,914 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:20:52,915 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:20:52,922 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:20:52" (1/1) ... [2021-11-21 01:20:52,928 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:20:52" (1/1) ... [2021-11-21 01:20:52,944 INFO L137 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 31 [2021-11-21 01:20:52,944 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:20:52,945 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:20:52,945 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:20:52,945 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:20:52,953 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:20:52" (1/1) ... [2021-11-21 01:20:52,953 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:20:52" (1/1) ... [2021-11-21 01:20:52,954 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:20:52" (1/1) ... [2021-11-21 01:20:52,954 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:20:52" (1/1) ... [2021-11-21 01:20:52,957 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:20:52" (1/1) ... [2021-11-21 01:20:52,960 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:20:52" (1/1) ... [2021-11-21 01:20:52,961 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:20:52" (1/1) ... [2021-11-21 01:20:52,962 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:20:52,963 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:20:52,964 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:20:52,964 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:20:52,965 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:20:52" (1/1) ... [2021-11-21 01:20:52,972 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:20:52,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2fa9f26-3187-4da7-ae4d-880d2d046756/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:20:52,996 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2fa9f26-3187-4da7-ae4d-880d2d046756/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:20:53,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2fa9f26-3187-4da7-ae4d-880d2d046756/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:20:53,048 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:20:53,048 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:20:53,048 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:20:53,049 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 01:20:53,103 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:20:53,104 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:20:53,185 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:20:53,200 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:20:53,200 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-21 01:20:53,203 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:20:53 BoogieIcfgContainer [2021-11-21 01:20:53,203 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:20:53,205 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:20:53,205 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:20:53,208 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:20:53,208 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:20:52" (1/3) ... [2021-11-21 01:20:53,209 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36311665 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:20:53, skipping insertion in model container [2021-11-21 01:20:53,209 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:20:52" (2/3) ... [2021-11-21 01:20:53,210 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36311665 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:20:53, skipping insertion in model container [2021-11-21 01:20:53,210 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:20:53" (3/3) ... [2021-11-21 01:20:53,211 INFO L111 eAbstractionObserver]: Analyzing ICFG count_up_down-1.c [2021-11-21 01:20:53,216 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:20:53,217 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 01:20:53,269 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:20:53,279 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 01:20:53,279 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 01:20:53,293 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 01:20:53,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-21 01:20:53,298 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:20:53,298 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-21 01:20:53,299 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:20:53,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:20:53,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1880294, now seen corresponding path program 1 times [2021-11-21 01:20:53,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:20:53,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394632004] [2021-11-21 01:20:53,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:20:53,317 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:20:53,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:20:53,519 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 01:20:53,519 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:20:53,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394632004] [2021-11-21 01:20:53,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394632004] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:20:53,521 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:20:53,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:20:53,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577311066] [2021-11-21 01:20:53,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:20:53,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:20:53,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:20:53,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:20:53,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:20:53,556 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 4 states, 4 states have (on average 1.0) internal successors, (4), 3 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 01:20:53,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:20:53,603 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2021-11-21 01:20:53,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:20:53,606 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 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 01:20:53,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:20:53,613 INFO L225 Difference]: With dead ends: 15 [2021-11-21 01:20:53,613 INFO L226 Difference]: Without dead ends: 6 [2021-11-21 01:20:53,616 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:20:53,633 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 6 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:20:53,634 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 6 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:20:53,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2021-11-21 01:20:53,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2021-11-21 01:20:53,678 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 01:20:53,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2021-11-21 01:20:53,679 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2021-11-21 01:20:53,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:20:53,680 INFO L470 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2021-11-21 01:20:53,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 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 01:20:53,680 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2021-11-21 01:20:53,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-21 01:20:53,681 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:20:53,681 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-21 01:20:53,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 01:20:53,681 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:20:53,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:20:53,698 INFO L85 PathProgramCache]: Analyzing trace with hash 57619255, now seen corresponding path program 1 times [2021-11-21 01:20:53,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:20:53,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992019153] [2021-11-21 01:20:53,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:20:53,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:20:53,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:20:54,031 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 01:20:54,031 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:20:54,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992019153] [2021-11-21 01:20:54,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992019153] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:20:54,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215039624] [2021-11-21 01:20:54,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:20:54,033 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:20:54,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2fa9f26-3187-4da7-ae4d-880d2d046756/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:20:54,035 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2fa9f26-3187-4da7-ae4d-880d2d046756/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:20:54,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2fa9f26-3187-4da7-ae4d-880d2d046756/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 01:20:54,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:20:54,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-21 01:20:54,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:20:54,411 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 01:20:54,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:20:54,516 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 01:20:54,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215039624] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:20:54,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1663923606] [2021-11-21 01:20:54,548 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-21 01:20:54,548 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:20:54,554 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:20:54,559 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:20:54,560 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:20:55,059 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:20:55,167 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:20:55,167 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:20:55,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2021-11-21 01:20:55,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814524677] [2021-11-21 01:20:55,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:20:55,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-21 01:20:55,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:20:55,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-21 01:20:55,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-11-21 01:20:55,170 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand has 9 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states 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 01:20:55,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:20:55,298 INFO L93 Difference]: Finished difference Result 13 states and 15 transitions. [2021-11-21 01:20:55,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-21 01:20:55,299 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 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 01:20:55,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:20:55,300 INFO L225 Difference]: With dead ends: 13 [2021-11-21 01:20:55,300 INFO L226 Difference]: Without dead ends: 9 [2021-11-21 01:20:55,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-11-21 01:20:55,302 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 9 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:20:55,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 6 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:20:55,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-11-21 01:20:55,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-11-21 01:20:55,306 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 01:20:55,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2021-11-21 01:20:55,306 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 5 [2021-11-21 01:20:55,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:20:55,309 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2021-11-21 01:20:55,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states 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 01:20:55,310 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2021-11-21 01:20:55,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-21 01:20:55,310 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:20:55,311 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1] [2021-11-21 01:20:55,348 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2fa9f26-3187-4da7-ae4d-880d2d046756/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 01:20:55,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2fa9f26-3187-4da7-ae4d-880d2d046756/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:20:55,512 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:20:55,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:20:55,512 INFO L85 PathProgramCache]: Analyzing trace with hash -2116862682, now seen corresponding path program 2 times [2021-11-21 01:20:55,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:20:55,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738316219] [2021-11-21 01:20:55,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:20:55,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:20:55,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:20:56,219 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 01:20:56,219 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:20:56,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738316219] [2021-11-21 01:20:56,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738316219] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:20:56,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334169555] [2021-11-21 01:20:56,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:20:56,220 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:20:56,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2fa9f26-3187-4da7-ae4d-880d2d046756/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:20:56,223 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2fa9f26-3187-4da7-ae4d-880d2d046756/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:20:56,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2fa9f26-3187-4da7-ae4d-880d2d046756/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 01:20:56,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-21 01:20:56,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:20:56,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-21 01:20:56,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:21:00,177 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 01:21:00,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:21:01,000 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 01:21:01,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334169555] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:21:01,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [797424792] [2021-11-21 01:21:01,002 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-21 01:21:01,002 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:21:01,003 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:21:01,003 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:21:01,003 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:21:01,372 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:21:01,501 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:21:01,502 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:21:01,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2021-11-21 01:21:01,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429021830] [2021-11-21 01:21:01,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:21:01,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-21 01:21:01,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:21:01,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-21 01:21:01,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=287, Unknown=1, NotChecked=0, Total=380 [2021-11-21 01:21:01,504 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 17 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 16 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 01:21:17,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:21:17,429 INFO L93 Difference]: Finished difference Result 20 states and 25 transitions. [2021-11-21 01:21:17,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-21 01:21:17,431 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 16 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 01:21:17,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:21:17,431 INFO L225 Difference]: With dead ends: 20 [2021-11-21 01:21:17,431 INFO L226 Difference]: Without dead ends: 15 [2021-11-21 01:21:17,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 19.3s TimeCoverageRelationStatistics Valid=223, Invalid=584, Unknown=5, NotChecked=0, Total=812 [2021-11-21 01:21:17,433 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 27 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:21:17,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 13 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-21 01:21:17,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-21 01:21:17,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-11-21 01:21:17,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 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 01:21:17,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2021-11-21 01:21:17,439 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 8 [2021-11-21 01:21:17,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:21:17,439 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2021-11-21 01:21:17,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 16 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 01:21:17,440 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2021-11-21 01:21:17,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-21 01:21:17,440 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:21:17,440 INFO L514 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1] [2021-11-21 01:21:17,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2fa9f26-3187-4da7-ae4d-880d2d046756/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-21 01:21:17,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2fa9f26-3187-4da7-ae4d-880d2d046756/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:21:17,641 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:21:17,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:21:17,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1541264262, now seen corresponding path program 3 times [2021-11-21 01:21:17,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:21:17,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89563489] [2021-11-21 01:21:17,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:21:17,643 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:21:17,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:21:18,481 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:21:18,482 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:21:18,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89563489] [2021-11-21 01:21:18,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89563489] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:21:18,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955247545] [2021-11-21 01:21:18,483 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 01:21:18,483 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:21:18,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2fa9f26-3187-4da7-ae4d-880d2d046756/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:21:18,486 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2fa9f26-3187-4da7-ae4d-880d2d046756/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:21:18,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2fa9f26-3187-4da7-ae4d-880d2d046756/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 01:21:18,885 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 01:21:18,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:21:18,887 WARN L261 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-21 01:21:18,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:21:23,801 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:21:23,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:21:28,997 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:21:28,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955247545] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:21:28,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [829816645] [2021-11-21 01:21:28,999 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-21 01:21:29,000 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:21:29,000 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:21:29,000 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:21:29,001 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:21:29,337 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:21:29,475 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:21:29,475 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:21:29,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 32 [2021-11-21 01:21:29,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333502741] [2021-11-21 01:21:29,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:21:29,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-21 01:21:29,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:21:29,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-21 01:21:29,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=957, Unknown=0, NotChecked=0, Total=1260 [2021-11-21 01:21:29,479 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 33 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 32 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:23:04,100 WARN L227 SmtUtils]: Spent 5.32s on a formula simplification that was a NOOP. DAG size: 104 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 01:25:31,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:25:31,216 INFO L93 Difference]: Finished difference Result 32 states and 43 transitions. [2021-11-21 01:25:31,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-21 01:25:31,217 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 32 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-21 01:25:31,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:25:31,218 INFO L225 Difference]: With dead ends: 32 [2021-11-21 01:25:31,218 INFO L226 Difference]: Without dead ends: 27 [2021-11-21 01:25:31,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 246.2s TimeCoverageRelationStatistics Valid=692, Invalid=1804, Unknown=54, NotChecked=0, Total=2550 [2021-11-21 01:25:31,221 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 88 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:25:31,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 30 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2021-11-21 01:25:31,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-21 01:25:31,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-11-21 01:25:31,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 0 states have call successors, (0), 0 states 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 01:25:31,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2021-11-21 01:25:31,229 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 14 [2021-11-21 01:25:31,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:25:31,229 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2021-11-21 01:25:31,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 32 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:31,230 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2021-11-21 01:25:31,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-21 01:25:31,231 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:25:31,231 INFO L514 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1] [2021-11-21 01:25:31,236 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2fa9f26-3187-4da7-ae4d-880d2d046756/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-21 01:25:31,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2fa9f26-3187-4da7-ae4d-880d2d046756/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:25:31,435 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:25:31,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:25:31,436 INFO L85 PathProgramCache]: Analyzing trace with hash 359802950, now seen corresponding path program 4 times [2021-11-21 01:25:31,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:25:31,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31586196] [2021-11-21 01:25:31,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:25:31,437 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:25:31,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:25:34,460 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:25:34,460 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:25:34,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31586196] [2021-11-21 01:25:34,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31586196] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:25:34,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065981772] [2021-11-21 01:25:34,460 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 01:25:34,460 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:25:34,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2fa9f26-3187-4da7-ae4d-880d2d046756/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:25:34,461 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2fa9f26-3187-4da7-ae4d-880d2d046756/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:25:34,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2fa9f26-3187-4da7-ae4d-880d2d046756/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-21 01:25:35,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:25:35,128 WARN L261 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 97 conjunts are in the unsatisfiable core [2021-11-21 01:25:35,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:25:54,728 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:25:54,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:26:30,093 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:26:30,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065981772] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:26:30,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1916097349] [2021-11-21 01:26:30,096 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-21 01:26:30,096 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:26:30,096 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:26:30,096 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:26:30,096 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:26:30,411 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:26:30,654 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:26:30,658 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:26:30,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 70 [2021-11-21 01:26:30,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89154888] [2021-11-21 01:26:30,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:26:30,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-11-21 01:26:30,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:26:30,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-11-21 01:26:30,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1242, Invalid=4154, Unknown=6, NotChecked=0, Total=5402 [2021-11-21 01:26:30,670 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand has 71 states, 71 states have (on average 1.028169014084507) internal successors, (73), 70 states have internal predecessors, (73), 0 states have call successors, (0), 0 states 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 01:26:36,502 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-21 01:26:39,743 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-21 01:26:43,903 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-21 01:26:47,079 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-21 01:30:50,364 WARN L227 SmtUtils]: Spent 1.86m on a formula simplification that was a NOOP. DAG size: 224 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 01:30:55,935 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse6 (div |c_ULTIMATE.start_main_~y~0#1| 4294967296))) (let ((.cse5 (* 4294967296 .cse6)) (.cse4 (* 4294967296 (div |c_ULTIMATE.start_main_~n~0#1| 4294967296)))) (let ((.cse1 (* 4294967296 (div |c_ULTIMATE.start_main_~x~0#1| 4294967296))) (.cse2 (+ |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~y~0#1| .cse4)) (.cse3 (+ |c_ULTIMATE.start_main_~n~0#1| .cse5)) (.cse0 (mod |c_ULTIMATE.start_main_~n~0#1| 4294967296))) (and (or (< 0 (mod (+ 4294967292 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (= .cse0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4) 4294967296))) (or (= .cse0 (mod (+ 16 |c_ULTIMATE.start_main_~y~0#1|) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967280) 4294967296))) (or (< 0 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967278) 4294967296)) (= .cse0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 18) 4294967296))) (or (< 0 (mod (+ 4294967275 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (= (mod (+ 21 |c_ULTIMATE.start_main_~y~0#1|) 4294967296) .cse0)) (or (< 0 (mod (+ 4294967294 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (= .cse0 (mod (+ 2 |c_ULTIMATE.start_main_~y~0#1|) 4294967296))) (or (< 0 (mod (+ 4294967295 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (= .cse0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 1) 4294967296))) (or (= .cse0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 10) 4294967296)) (< 0 (mod (+ 4294967286 |c_ULTIMATE.start_main_~x~0#1|) 4294967296))) (<= 1 |c_ULTIMATE.start___VERIFIER_assert_~cond#1|) (or (= (mod (+ 22 |c_ULTIMATE.start_main_~y~0#1|) 4294967296) .cse0) (< 0 (mod (+ 4294967274 |c_ULTIMATE.start_main_~x~0#1|) 4294967296))) (or (<= (+ |c_ULTIMATE.start_main_~n~0#1| .cse1) .cse2) (< .cse3 (+ |c_ULTIMATE.start_main_~y~0#1| .cse4 1))) (or (= .cse0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 12) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967284) 4294967296))) (or (= .cse0 (mod (+ 14 |c_ULTIMATE.start_main_~y~0#1|) 4294967296)) (< 0 (mod (+ 4294967282 |c_ULTIMATE.start_main_~x~0#1|) 4294967296))) (or (<= (+ |c_ULTIMATE.start_main_~n~0#1| .cse5 4294967296 .cse1) .cse2) (<= (+ |c_ULTIMATE.start_main_~y~0#1| .cse4) .cse3)) (or (= .cse0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 20) 4294967296)) (< 0 (mod (+ 4294967276 |c_ULTIMATE.start_main_~x~0#1|) 4294967296))) (or (< 0 (mod (+ 4294967288 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (= .cse0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 8) 4294967296))) (or (= .cse0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 15) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967281) 4294967296))) (or (< 0 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967287) 4294967296)) (= .cse0 (mod (+ 9 |c_ULTIMATE.start_main_~y~0#1|) 4294967296))) (<= .cse6 0) (or (= .cse0 (mod (+ 5 |c_ULTIMATE.start_main_~y~0#1|) 4294967296)) (< 0 (mod (+ 4294967291 |c_ULTIMATE.start_main_~x~0#1|) 4294967296))) (or (< 0 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967277) 4294967296)) (= .cse0 (mod (+ 19 |c_ULTIMATE.start_main_~y~0#1|) 4294967296))) (or (= .cse0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 11) 4294967296)) (< 0 (mod (+ 4294967285 |c_ULTIMATE.start_main_~x~0#1|) 4294967296))) (or (= .cse0 (mod (+ 6 |c_ULTIMATE.start_main_~y~0#1|) 4294967296)) (< 0 (mod (+ 4294967290 |c_ULTIMATE.start_main_~x~0#1|) 4294967296))) (or (< 0 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967293) 4294967296)) (= .cse0 (mod (+ 3 |c_ULTIMATE.start_main_~y~0#1|) 4294967296))) (or (= .cse0 (mod (+ 7 |c_ULTIMATE.start_main_~y~0#1|) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967289) 4294967296))) (or (< 0 (mod (+ 4294967279 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (= .cse0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 17) 4294967296))) (or (= .cse0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 13) 4294967296)) (< 0 (mod (+ 4294967283 |c_ULTIMATE.start_main_~x~0#1|) 4294967296))))))) is different from false [2021-11-21 01:34:32,496 WARN L227 SmtUtils]: Spent 1.61m on a formula simplification that was a NOOP. DAG size: 201 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)