./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/square_8+soft_float_4-2a.c.cil.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_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/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_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/square_8+soft_float_4-2a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/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_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/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 2e745a133311e60f1a9e202bf4fcb9b524a944d790f4c1df2987f4b8dfd5e08b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:00:12,346 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:00:12,348 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:00:12,381 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:00:12,381 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:00:12,383 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:00:12,384 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:00:12,387 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:00:12,389 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:00:12,391 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:00:12,392 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:00:12,394 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:00:12,394 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:00:12,396 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:00:12,398 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:00:12,400 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:00:12,401 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:00:12,402 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:00:12,404 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:00:12,407 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:00:12,409 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:00:12,418 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:00:12,419 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:00:12,422 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:00:12,425 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:00:12,436 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:00:12,437 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:00:12,438 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:00:12,438 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:00:12,440 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:00:12,440 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:00:12,441 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:00:12,442 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:00:12,443 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:00:12,444 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:00:12,445 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:00:12,446 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:00:12,446 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:00:12,447 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:00:12,448 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:00:12,449 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:00:12,450 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 01:00:12,478 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:00:12,479 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:00:12,479 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:00:12,479 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:00:12,480 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:00:12,481 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:00:12,481 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:00:12,481 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:00:12,482 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:00:12,482 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 01:00:12,482 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:00:12,483 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:00:12,483 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 01:00:12,483 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 01:00:12,484 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:00:12,484 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 01:00:12,484 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 01:00:12,485 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 01:00:12,486 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:00:12,486 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 01:00:12,486 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:00:12,487 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 01:00:12,487 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:00:12,487 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 01:00:12,487 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:00:12,488 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 01:00:12,488 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 01:00:12,488 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 01:00:12,489 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:00:12,489 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 01:00:12,489 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:00:12,490 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:00:12,490 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:00:12,490 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:00:12,490 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:00:12,490 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 01:00:12,491 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 01:00:12,491 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 01:00:12,491 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 01:00:12,491 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:00:12,492 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:00:12,492 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_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2e745a133311e60f1a9e202bf4fcb9b524a944d790f4c1df2987f4b8dfd5e08b [2021-11-21 01:00:12,785 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:00:12,820 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:00:12,824 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:00:12,825 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:00:12,826 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:00:12,827 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/combinations/square_8+soft_float_4-2a.c.cil.c [2021-11-21 01:00:12,901 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/data/62929e7ef/f694af0821e1497ab054194e40569885/FLAGb01548117 [2021-11-21 01:00:13,452 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:00:13,452 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/sv-benchmarks/c/combinations/square_8+soft_float_4-2a.c.cil.c [2021-11-21 01:00:13,467 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/data/62929e7ef/f694af0821e1497ab054194e40569885/FLAGb01548117 [2021-11-21 01:00:13,814 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/data/62929e7ef/f694af0821e1497ab054194e40569885 [2021-11-21 01:00:13,817 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:00:13,819 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:00:13,821 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:00:13,821 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:00:13,825 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:00:13,826 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:00:13" (1/1) ... [2021-11-21 01:00:13,827 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e1e06ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:00:13, skipping insertion in model container [2021-11-21 01:00:13,827 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:00:13" (1/1) ... [2021-11-21 01:00:13,834 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:00:13,860 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:00:14,079 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_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/sv-benchmarks/c/combinations/square_8+soft_float_4-2a.c.cil.c[1995,2008] [2021-11-21 01:00:14,085 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_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/sv-benchmarks/c/combinations/square_8+soft_float_4-2a.c.cil.c[2389,2402] [2021-11-21 01:00:14,141 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:00:14,149 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:00:14,164 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_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/sv-benchmarks/c/combinations/square_8+soft_float_4-2a.c.cil.c[1995,2008] [2021-11-21 01:00:14,165 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_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/sv-benchmarks/c/combinations/square_8+soft_float_4-2a.c.cil.c[2389,2402] [2021-11-21 01:00:14,193 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:00:14,207 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:00:14,207 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:00:14 WrapperNode [2021-11-21 01:00:14,207 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:00:14,209 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:00:14,209 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:00:14,209 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:00:14,227 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:00:14" (1/1) ... [2021-11-21 01:00:14,244 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:00:14" (1/1) ... [2021-11-21 01:00:14,263 INFO L137 Inliner]: procedures = 27, calls = 19, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 74 [2021-11-21 01:00:14,264 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:00:14,265 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:00:14,265 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:00:14,265 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:00:14,272 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:00:14" (1/1) ... [2021-11-21 01:00:14,272 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:00:14" (1/1) ... [2021-11-21 01:00:14,275 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:00:14" (1/1) ... [2021-11-21 01:00:14,275 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:00:14" (1/1) ... [2021-11-21 01:00:14,283 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:00:14" (1/1) ... [2021-11-21 01:00:14,288 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:00:14" (1/1) ... [2021-11-21 01:00:14,290 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:00:14" (1/1) ... [2021-11-21 01:00:14,293 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:00:14,294 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:00:14,294 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:00:14,294 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:00:14,295 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:00:14" (1/1) ... [2021-11-21 01:00:14,315 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:00:14,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:00:14,342 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:00:14,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:00:14,384 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:00:14,384 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2021-11-21 01:00:14,385 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2021-11-21 01:00:14,385 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2021-11-21 01:00:14,385 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2021-11-21 01:00:14,385 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 01:00:14,385 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:00:14,385 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:00:14,386 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-21 01:00:14,386 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-21 01:00:14,503 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:00:14,505 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:00:14,752 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:00:14,853 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:00:14,853 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-21 01:00:14,855 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:00:14 BoogieIcfgContainer [2021-11-21 01:00:14,855 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:00:14,857 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:00:14,857 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:00:14,867 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:00:14,868 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:00:13" (1/3) ... [2021-11-21 01:00:14,869 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a50740c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:00:14, skipping insertion in model container [2021-11-21 01:00:14,869 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:00:14" (2/3) ... [2021-11-21 01:00:14,869 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a50740c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:00:14, skipping insertion in model container [2021-11-21 01:00:14,869 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:00:14" (3/3) ... [2021-11-21 01:00:14,872 INFO L111 eAbstractionObserver]: Analyzing ICFG square_8+soft_float_4-2a.c.cil.c [2021-11-21 01:00:14,878 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:00:14,879 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-21 01:00:14,954 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:00:14,963 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 01:00:14,963 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-21 01:00:14,993 INFO L276 IsEmpty]: Start isEmpty. Operand has 49 states, 35 states have (on average 1.4857142857142858) internal successors, (52), 37 states have internal predecessors, (52), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-21 01:00:15,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-21 01:00:15,008 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:00:15,008 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-21 01:00:15,009 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:00:15,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:00:15,016 INFO L85 PathProgramCache]: Analyzing trace with hash 6807338, now seen corresponding path program 1 times [2021-11-21 01:00:15,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:00:15,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268163467] [2021-11-21 01:00:15,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:00:15,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:00:15,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-21 01:00:15,161 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-21 01:00:15,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-21 01:00:15,226 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-21 01:00:15,229 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-21 01:00:15,230 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2021-11-21 01:00:15,234 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2021-11-21 01:00:15,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 01:00:15,241 INFO L732 BasicCegarLoop]: Path program histogram: [1] [2021-11-21 01:00:15,244 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-21 01:00:15,274 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.11 01:00:15 BoogieIcfgContainer [2021-11-21 01:00:15,274 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-21 01:00:15,278 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-21 01:00:15,278 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-21 01:00:15,279 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-21 01:00:15,279 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:00:14" (3/4) ... [2021-11-21 01:00:15,283 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-21 01:00:15,283 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-21 01:00:15,286 INFO L158 Benchmark]: Toolchain (without parser) took 1465.19ms. Allocated memory was 96.5MB in the beginning and 117.4MB in the end (delta: 21.0MB). Free memory was 62.9MB in the beginning and 86.0MB in the end (delta: -23.0MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-21 01:00:15,286 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 96.5MB. Free memory was 51.0MB in the beginning and 50.9MB in the end (delta: 40.1kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-21 01:00:15,288 INFO L158 Benchmark]: CACSL2BoogieTranslator took 386.70ms. Allocated memory is still 96.5MB. Free memory was 62.8MB in the beginning and 68.3MB in the end (delta: -5.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-21 01:00:15,289 INFO L158 Benchmark]: Boogie Procedure Inliner took 55.59ms. Allocated memory is still 96.5MB. Free memory was 68.3MB in the beginning and 66.5MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-21 01:00:15,295 INFO L158 Benchmark]: Boogie Preprocessor took 28.33ms. Allocated memory is still 96.5MB. Free memory was 66.5MB in the beginning and 65.3MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-21 01:00:15,297 INFO L158 Benchmark]: RCFGBuilder took 561.77ms. Allocated memory is still 96.5MB. Free memory was 65.0MB in the beginning and 50.1MB in the end (delta: 15.0MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-21 01:00:15,298 INFO L158 Benchmark]: TraceAbstraction took 417.32ms. Allocated memory was 96.5MB in the beginning and 117.4MB in the end (delta: 21.0MB). Free memory was 49.5MB in the beginning and 86.4MB in the end (delta: -36.9MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-21 01:00:15,298 INFO L158 Benchmark]: Witness Printer took 5.05ms. Allocated memory is still 117.4MB. Free memory was 86.4MB in the beginning and 86.0MB in the end (delta: 416.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-21 01:00:15,309 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 96.5MB. Free memory was 51.0MB in the beginning and 50.9MB in the end (delta: 40.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 386.70ms. Allocated memory is still 96.5MB. Free memory was 62.8MB in the beginning and 68.3MB in the end (delta: -5.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 55.59ms. Allocated memory is still 96.5MB. Free memory was 68.3MB in the beginning and 66.5MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 28.33ms. Allocated memory is still 96.5MB. Free memory was 66.5MB in the beginning and 65.3MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 561.77ms. Allocated memory is still 96.5MB. Free memory was 65.0MB in the beginning and 50.1MB in the end (delta: 15.0MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 417.32ms. Allocated memory was 96.5MB in the beginning and 117.4MB in the end (delta: 21.0MB). Free memory was 49.5MB in the beginning and 86.4MB in the end (delta: -36.9MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 5.05ms. Allocated memory is still 117.4MB. Free memory was 86.4MB in the beginning and 86.0MB in the end (delta: 416.9kB). 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: 48]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 47, overapproximation of someBinaryArithmeticFLOAToperation at line 45. Possible FailurePath: [L310] COND TRUE __VERIFIER_nondet_int() [L311] CALL main1() [L39] float IN = __VERIFIER_nondet_float(); [L40] CALL assume_abort_if_not(IN >= 0.0f && IN < 1.0f) [L34] COND FALSE !(!cond) [L40] RET assume_abort_if_not(IN >= 0.0f && IN < 1.0f) [L42] float x = IN; [L44-L45] float result = 1.0f + 0.5f*x - 0.125f*x*x + 0.0625f*x*x*x - 0.0390625f*x*x*x*x; VAL [IN=49, x=49] [L47] COND TRUE !(result >= 0.0f && result < 1.5f) VAL [IN=49, x=49] [L48] reach_error() VAL [IN=49, x=49] - UnprovableResult [Line: 61]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 49 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 0.3s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=49occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 4 NumberOfCodeBlocks, 4 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 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 01:00:15,381 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/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_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/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_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/square_8+soft_float_4-2a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/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_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/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 2e745a133311e60f1a9e202bf4fcb9b524a944d790f4c1df2987f4b8dfd5e08b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:00:18,243 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:00:18,247 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:00:18,298 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:00:18,298 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:00:18,305 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:00:18,309 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:00:18,315 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:00:18,319 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:00:18,329 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:00:18,330 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:00:18,331 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:00:18,332 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:00:18,333 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:00:18,335 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:00:18,337 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:00:18,338 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:00:18,339 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:00:18,348 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:00:18,360 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:00:18,363 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:00:18,366 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:00:18,370 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:00:18,372 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:00:18,376 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:00:18,376 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:00:18,377 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:00:18,378 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:00:18,378 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:00:18,379 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:00:18,380 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:00:18,381 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:00:18,382 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:00:18,383 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:00:18,384 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:00:18,384 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:00:18,395 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:00:18,395 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:00:18,396 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:00:18,397 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:00:18,399 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:00:18,400 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-21 01:00:18,448 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:00:18,448 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:00:18,449 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:00:18,449 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:00:18,451 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:00:18,451 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:00:18,451 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:00:18,451 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:00:18,452 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:00:18,452 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:00:18,453 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:00:18,454 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:00:18,456 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:00:18,456 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 01:00:18,456 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 01:00:18,457 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:00:18,457 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 01:00:18,457 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:00:18,458 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 01:00:18,458 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-21 01:00:18,458 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-21 01:00:18,458 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 01:00:18,459 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 01:00:18,459 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:00:18,459 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 01:00:18,460 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:00:18,460 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-21 01:00:18,460 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:00:18,461 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:00:18,461 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:00:18,461 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:00:18,462 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 01:00:18,462 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-21 01:00:18,462 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-21 01:00:18,463 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 01:00:18,463 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:00:18,463 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:00:18,464 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_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2e745a133311e60f1a9e202bf4fcb9b524a944d790f4c1df2987f4b8dfd5e08b [2021-11-21 01:00:18,983 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:00:19,015 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:00:19,020 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:00:19,022 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:00:19,023 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:00:19,025 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/combinations/square_8+soft_float_4-2a.c.cil.c [2021-11-21 01:00:19,108 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/data/33d5b1fba/d96764f676104bcc910dcd963d314696/FLAG909b79eaa [2021-11-21 01:00:19,757 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:00:19,757 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/sv-benchmarks/c/combinations/square_8+soft_float_4-2a.c.cil.c [2021-11-21 01:00:19,776 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/data/33d5b1fba/d96764f676104bcc910dcd963d314696/FLAG909b79eaa [2021-11-21 01:00:20,026 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/data/33d5b1fba/d96764f676104bcc910dcd963d314696 [2021-11-21 01:00:20,031 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:00:20,035 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:00:20,038 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:00:20,038 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:00:20,043 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:00:20,044 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:00:20" (1/1) ... [2021-11-21 01:00:20,047 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b07cbe5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:00:20, skipping insertion in model container [2021-11-21 01:00:20,048 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:00:20" (1/1) ... [2021-11-21 01:00:20,057 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:00:20,123 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:00:20,354 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_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/sv-benchmarks/c/combinations/square_8+soft_float_4-2a.c.cil.c[1995,2008] [2021-11-21 01:00:20,362 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_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/sv-benchmarks/c/combinations/square_8+soft_float_4-2a.c.cil.c[2389,2402] [2021-11-21 01:00:20,466 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:00:20,486 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:00:20,515 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_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/sv-benchmarks/c/combinations/square_8+soft_float_4-2a.c.cil.c[1995,2008] [2021-11-21 01:00:20,525 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_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/sv-benchmarks/c/combinations/square_8+soft_float_4-2a.c.cil.c[2389,2402] [2021-11-21 01:00:20,567 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:00:20,600 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:00:20,601 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:00:20 WrapperNode [2021-11-21 01:00:20,601 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:00:20,602 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:00:20,602 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:00:20,603 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:00:20,611 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:00:20" (1/1) ... [2021-11-21 01:00:20,639 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:00:20" (1/1) ... [2021-11-21 01:00:20,685 INFO L137 Inliner]: procedures = 28, calls = 19, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 70 [2021-11-21 01:00:20,685 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:00:20,686 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:00:20,687 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:00:20,687 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:00:20,697 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:00:20" (1/1) ... [2021-11-21 01:00:20,698 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:00:20" (1/1) ... [2021-11-21 01:00:20,723 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:00:20" (1/1) ... [2021-11-21 01:00:20,724 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:00:20" (1/1) ... [2021-11-21 01:00:20,734 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:00:20" (1/1) ... [2021-11-21 01:00:20,755 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:00:20" (1/1) ... [2021-11-21 01:00:20,758 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:00:20" (1/1) ... [2021-11-21 01:00:20,763 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:00:20,764 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:00:20,764 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:00:20,764 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:00:20,773 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:00:20" (1/1) ... [2021-11-21 01:00:20,782 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:00:20,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:00:20,815 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:00:20,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:00:20,877 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:00:20,877 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-21 01:00:20,878 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2021-11-21 01:00:20,878 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2021-11-21 01:00:20,878 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2021-11-21 01:00:20,878 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2021-11-21 01:00:20,878 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:00:20,878 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:00:20,879 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-21 01:00:20,879 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-21 01:00:21,013 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:00:21,015 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:00:23,547 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:00:23,556 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:00:23,556 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-21 01:00:23,559 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:00:23 BoogieIcfgContainer [2021-11-21 01:00:23,559 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:00:23,561 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:00:23,561 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:00:23,565 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:00:23,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:00:20" (1/3) ... [2021-11-21 01:00:23,566 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3daebbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:00:23, skipping insertion in model container [2021-11-21 01:00:23,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:00:20" (2/3) ... [2021-11-21 01:00:23,567 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3daebbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:00:23, skipping insertion in model container [2021-11-21 01:00:23,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:00:23" (3/3) ... [2021-11-21 01:00:23,569 INFO L111 eAbstractionObserver]: Analyzing ICFG square_8+soft_float_4-2a.c.cil.c [2021-11-21 01:00:23,576 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:00:23,591 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-21 01:00:23,649 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:00:23,657 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 01:00:23,658 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-21 01:00:23,678 INFO L276 IsEmpty]: Start isEmpty. Operand has 63 states, 49 states have (on average 1.489795918367347) internal successors, (73), 51 states have internal predecessors, (73), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-21 01:00:23,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-21 01:00:23,684 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:00:23,684 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:00:23,685 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:00:23,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:00:23,692 INFO L85 PathProgramCache]: Analyzing trace with hash -548115930, now seen corresponding path program 1 times [2021-11-21 01:00:23,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:00:23,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [564597010] [2021-11-21 01:00:23,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:00:23,708 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:00:23,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:00:23,712 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:00:23,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-21 01:00:24,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:00:24,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-21 01:00:24,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:00:24,392 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 01:00:24,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:00:24,431 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 01:00:24,433 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:00:24,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [564597010] [2021-11-21 01:00:24,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [564597010] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:00:24,434 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:00:24,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-21 01:00:24,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217021082] [2021-11-21 01:00:24,437 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:00:24,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-21 01:00:24,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:00:24,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-21 01:00:24,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-21 01:00:24,477 INFO L87 Difference]: Start difference. First operand has 63 states, 49 states have (on average 1.489795918367347) internal successors, (73), 51 states have internal predecessors, (73), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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 01:00:24,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:00:24,528 INFO L93 Difference]: Finished difference Result 121 states and 178 transitions. [2021-11-21 01:00:24,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-21 01:00:24,532 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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 7 [2021-11-21 01:00:24,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:00:24,543 INFO L225 Difference]: With dead ends: 121 [2021-11-21 01:00:24,543 INFO L226 Difference]: Without dead ends: 56 [2021-11-21 01:00:24,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 12 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 01:00:24,553 INFO L933 BasicCegarLoop]: 81 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, 81 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 01:00:24,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:00:24,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-21 01:00:24,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-11-21 01:00:24,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 43 states have (on average 1.3488372093023255) internal successors, (58), 45 states have internal predecessors, (58), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-21 01:00:24,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 73 transitions. [2021-11-21 01:00:24,606 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 73 transitions. Word has length 7 [2021-11-21 01:00:24,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:00:24,607 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 73 transitions. [2021-11-21 01:00:24,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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 01:00:24,608 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 73 transitions. [2021-11-21 01:00:24,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-21 01:00:24,609 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:00:24,609 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:00:24,638 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-21 01:00:24,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:00:24,834 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:00:24,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:00:24,835 INFO L85 PathProgramCache]: Analyzing trace with hash -548056348, now seen corresponding path program 1 times [2021-11-21 01:00:24,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:00:24,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1345628826] [2021-11-21 01:00:24,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:00:24,836 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:00:24,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:00:24,838 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:00:24,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-21 01:00:43,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:00:43,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-21 01:00:43,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:00:57,754 WARN L838 $PredicateComparison]: unable to prove that (and (exists ((|ULTIMATE.start_main1_~IN~0#1| (_ FloatingPoint 8 24))) (let ((.cse0 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (and (fp.geq |ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24)) (fp.lt |ULTIMATE.start_main1_~IN~0#1| .cse0) (= |c_ULTIMATE.start_main1_~result~0#1| (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode .cse0 (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 2.0)) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 8.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 16.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 128.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)))))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from false [2021-11-21 01:01:48,166 WARN L838 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_main1_~IN~0#1| (_ FloatingPoint 8 24))) (let ((.cse1 ((_ to_fp 8 24) roundNearestTiesToEven 1.0))) (and (let ((.cse0 (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven .cse1 (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 2.0)) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 8.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 16.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 5.0 128.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)))) (or (not (fp.lt .cse0 ((_ to_fp 8 24) roundNearestTiesToEven (/ 3.0 2.0)))) (not (fp.geq .cse0 (_ +zero 8 24))))) (fp.geq |ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24)) (fp.lt |ULTIMATE.start_main1_~IN~0#1| .cse1)))) is different from false [2021-11-21 01:01:50,211 WARN L860 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_main1_~IN~0#1| (_ FloatingPoint 8 24))) (let ((.cse1 ((_ to_fp 8 24) roundNearestTiesToEven 1.0))) (and (let ((.cse0 (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven .cse1 (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 2.0)) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 8.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 16.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 5.0 128.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)))) (or (not (fp.lt .cse0 ((_ to_fp 8 24) roundNearestTiesToEven (/ 3.0 2.0)))) (not (fp.geq .cse0 (_ +zero 8 24))))) (fp.geq |ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24)) (fp.lt |ULTIMATE.start_main1_~IN~0#1| .cse1)))) is different from true [2021-11-21 01:01:50,212 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 01:01:50,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:02:00,831 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode 1.0) (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 2.0)) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 8.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 16.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 128.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)))) (and (fp.geq .cse0 (_ +zero 8 24)) (fp.lt .cse0 ((_ to_fp 8 24) c_currentRoundingMode (/ 3.0 2.0))))) is different from false [2021-11-21 01:02:02,899 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode 1.0) (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 2.0)) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 8.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 16.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 128.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)))) (and (fp.geq .cse0 (_ +zero 8 24)) (fp.lt .cse0 ((_ to_fp 8 24) c_currentRoundingMode (/ 3.0 2.0))))) is different from true [2021-11-21 01:02:17,656 WARN L838 $PredicateComparison]: unable to prove that (or (= |c_ULTIMATE.start_assume_abort_if_not_~cond#1| (_ bv0 32)) (let ((.cse0 (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode 1.0) (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 2.0)) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 8.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 16.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 128.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)))) (and (fp.geq .cse0 (_ +zero 8 24)) (fp.lt .cse0 ((_ to_fp 8 24) c_currentRoundingMode (/ 3.0 2.0)))))) is different from false [2021-11-21 01:02:19,732 WARN L860 $PredicateComparison]: unable to prove that (or (= |c_ULTIMATE.start_assume_abort_if_not_~cond#1| (_ bv0 32)) (let ((.cse0 (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode 1.0) (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 2.0)) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 8.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 16.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 128.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)))) (and (fp.geq .cse0 (_ +zero 8 24)) (fp.lt .cse0 ((_ to_fp 8 24) c_currentRoundingMode (/ 3.0 2.0)))))) is different from true [2021-11-21 01:03:04,257 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main1_~IN~0#1_4| (_ FloatingPoint 8 24))) (let ((.cse0 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (or (not (fp.lt |v_ULTIMATE.start_main1_~IN~0#1_4| .cse0)) (not (fp.geq |v_ULTIMATE.start_main1_~IN~0#1_4| (_ +zero 8 24))) (let ((.cse1 (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode .cse0 (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 2.0)) |v_ULTIMATE.start_main1_~IN~0#1_4|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 8.0)) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 16.0)) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 128.0)) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|)))) (and (fp.lt .cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 3.0 2.0))) (fp.geq .cse1 (_ +zero 8 24))))))) is different from false [2021-11-21 01:03:06,325 WARN L860 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main1_~IN~0#1_4| (_ FloatingPoint 8 24))) (let ((.cse0 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (or (not (fp.lt |v_ULTIMATE.start_main1_~IN~0#1_4| .cse0)) (not (fp.geq |v_ULTIMATE.start_main1_~IN~0#1_4| (_ +zero 8 24))) (let ((.cse1 (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode .cse0 (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 2.0)) |v_ULTIMATE.start_main1_~IN~0#1_4|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 8.0)) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 16.0)) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 128.0)) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|)))) (and (fp.lt .cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 3.0 2.0))) (fp.geq .cse1 (_ +zero 8 24))))))) is different from true [2021-11-21 01:03:48,612 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 01:03:48,613 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:03:48,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1345628826] [2021-11-21 01:03:48,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1345628826] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:03:48,613 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:03:48,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 10 [2021-11-21 01:03:48,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854332964] [2021-11-21 01:03:48,614 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:03:48,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-21 01:03:48,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:03:48,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-21 01:03:48,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=20, Unknown=9, NotChecked=60, Total=110 [2021-11-21 01:03:48,617 INFO L87 Difference]: Start difference. First operand 56 states and 73 transitions. Second operand has 11 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 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 01:03:50,689 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_main1_~IN~0#1_4| (_ FloatingPoint 8 24))) (let ((.cse0 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (or (not (fp.lt |v_ULTIMATE.start_main1_~IN~0#1_4| .cse0)) (not (fp.geq |v_ULTIMATE.start_main1_~IN~0#1_4| (_ +zero 8 24))) (let ((.cse1 (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode .cse0 (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 2.0)) |v_ULTIMATE.start_main1_~IN~0#1_4|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 8.0)) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 16.0)) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 128.0)) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|)))) (and (fp.lt .cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 3.0 2.0))) (fp.geq .cse1 (_ +zero 8 24))))))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from false [2021-11-21 01:03:52,762 WARN L860 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_main1_~IN~0#1_4| (_ FloatingPoint 8 24))) (let ((.cse0 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (or (not (fp.lt |v_ULTIMATE.start_main1_~IN~0#1_4| .cse0)) (not (fp.geq |v_ULTIMATE.start_main1_~IN~0#1_4| (_ +zero 8 24))) (let ((.cse1 (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode .cse0 (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 2.0)) |v_ULTIMATE.start_main1_~IN~0#1_4|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 8.0)) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 16.0)) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 128.0)) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|)))) (and (fp.lt .cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 3.0 2.0))) (fp.geq .cse1 (_ +zero 8 24))))))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from true [2021-11-21 01:03:54,829 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse2 (= |c_ULTIMATE.start_assume_abort_if_not_~cond#1| (_ bv0 32))) (.cse3 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (and (= c_currentRoundingMode roundNearestTiesToEven) (let ((.cse0 (fp.geq |c_ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24))) (.cse1 (fp.lt |c_ULTIMATE.start_main1_~IN~0#1| .cse3))) (or (and .cse0 .cse1 (= |c_ULTIMATE.start_assume_abort_if_not_~cond#1| (_ bv1 32))) (and .cse2 (or (not .cse0) (not .cse1))))) (or .cse2 (let ((.cse4 (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode .cse3 (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 2.0)) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 8.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 16.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 128.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)))) (and (fp.geq .cse4 (_ +zero 8 24)) (fp.lt .cse4 ((_ to_fp 8 24) c_currentRoundingMode (/ 3.0 2.0)))))))) is different from false [2021-11-21 01:03:56,904 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse2 (= |c_ULTIMATE.start_assume_abort_if_not_~cond#1| (_ bv0 32))) (.cse3 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (and (= c_currentRoundingMode roundNearestTiesToEven) (let ((.cse0 (fp.geq |c_ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24))) (.cse1 (fp.lt |c_ULTIMATE.start_main1_~IN~0#1| .cse3))) (or (and .cse0 .cse1 (= |c_ULTIMATE.start_assume_abort_if_not_~cond#1| (_ bv1 32))) (and .cse2 (or (not .cse0) (not .cse1))))) (or .cse2 (let ((.cse4 (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode .cse3 (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 2.0)) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 8.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 16.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 128.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)))) (and (fp.geq .cse4 (_ +zero 8 24)) (fp.lt .cse4 ((_ to_fp 8 24) c_currentRoundingMode (/ 3.0 2.0)))))))) is different from true [2021-11-21 01:03:58,983 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (let ((.cse0 (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode .cse1 (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 2.0)) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 8.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 16.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 128.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)))) (and (fp.geq .cse0 (_ +zero 8 24)) (fp.geq |c_ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24)) (fp.lt |c_ULTIMATE.start_main1_~IN~0#1| .cse1) (fp.lt .cse0 ((_ to_fp 8 24) c_currentRoundingMode (/ 3.0 2.0))) (= c_currentRoundingMode roundNearestTiesToEven)))) is different from false [2021-11-21 01:04:01,055 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (let ((.cse0 (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode .cse1 (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 2.0)) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 8.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 16.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 128.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)))) (and (fp.geq .cse0 (_ +zero 8 24)) (fp.geq |c_ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24)) (fp.lt |c_ULTIMATE.start_main1_~IN~0#1| .cse1) (fp.lt .cse0 ((_ to_fp 8 24) c_currentRoundingMode (/ 3.0 2.0))) (= c_currentRoundingMode roundNearestTiesToEven)))) is different from true [2021-11-21 01:04:03,142 WARN L838 $PredicateComparison]: unable to prove that (and (fp.geq |c_ULTIMATE.start_main1_~result~0#1| (_ +zero 8 24)) (exists ((|ULTIMATE.start_main1_~IN~0#1| (_ FloatingPoint 8 24))) (let ((.cse0 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (and (fp.geq |ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24)) (fp.lt |ULTIMATE.start_main1_~IN~0#1| .cse0) (= |c_ULTIMATE.start_main1_~result~0#1| (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode .cse0 (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 2.0)) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 8.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 16.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 128.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)))))) (fp.lt |c_ULTIMATE.start_main1_~result~0#1| ((_ to_fp 8 24) c_currentRoundingMode (/ 3.0 2.0))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from false [2021-11-21 01:04:03,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:04:03,175 INFO L93 Difference]: Finished difference Result 56 states and 73 transitions. [2021-11-21 01:04:03,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:04:03,175 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 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 7 [2021-11-21 01:04:03,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:04:03,177 INFO L225 Difference]: With dead ends: 56 [2021-11-21 01:04:03,177 INFO L226 Difference]: Without dead ends: 51 [2021-11-21 01:04:03,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 9 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 33.3s TimeCoverageRelationStatistics Valid=29, Invalid=21, Unknown=16, NotChecked=144, Total=210 [2021-11-21 01:04:03,180 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 0 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 269 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:04:03,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 261 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 269 Unchecked, 0.0s Time] [2021-11-21 01:04:03,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-11-21 01:04:03,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-11-21 01:04:03,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 39 states have (on average 1.358974358974359) internal successors, (53), 40 states have internal predecessors, (53), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-21 01:04:03,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 68 transitions. [2021-11-21 01:04:03,191 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 68 transitions. Word has length 7 [2021-11-21 01:04:03,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:04:03,191 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 68 transitions. [2021-11-21 01:04:03,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 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 01:04:03,192 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 68 transitions. [2021-11-21 01:04:03,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-21 01:04:03,193 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:04:03,194 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:04:03,212 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-21 01:04:03,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:04:03,397 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:04:03,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:04:03,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1078958274, now seen corresponding path program 1 times [2021-11-21 01:04:03,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:04:03,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [81750500] [2021-11-21 01:04:03,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:04:03,400 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:04:03,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:04:03,401 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:04:03,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-21 01:04:03,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:04:03,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-21 01:04:03,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:04:03,819 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-21 01:04:03,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:04:04,117 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-21 01:04:04,118 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:04:04,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [81750500] [2021-11-21 01:04:04,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [81750500] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:04:04,118 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:04:04,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 8 [2021-11-21 01:04:04,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781840965] [2021-11-21 01:04:04,119 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:04:04,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 01:04:04,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:04:04,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 01:04:04,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:04:04,121 INFO L87 Difference]: Start difference. First operand 51 states and 68 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-21 01:04:04,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:04:04,485 INFO L93 Difference]: Finished difference Result 100 states and 135 transitions. [2021-11-21 01:04:04,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-21 01:04:04,486 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 32 [2021-11-21 01:04:04,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:04:04,490 INFO L225 Difference]: With dead ends: 100 [2021-11-21 01:04:04,490 INFO L226 Difference]: Without dead ends: 72 [2021-11-21 01:04:04,491 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-21 01:04:04,493 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 20 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:04:04,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 438 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:04:04,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-11-21 01:04:04,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 62. [2021-11-21 01:04:04,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 47 states have (on average 1.297872340425532) internal successors, (61), 49 states have internal predecessors, (61), 9 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) [2021-11-21 01:04:04,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 81 transitions. [2021-11-21 01:04:04,510 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 81 transitions. Word has length 32 [2021-11-21 01:04:04,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:04:04,510 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 81 transitions. [2021-11-21 01:04:04,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-21 01:04:04,511 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 81 transitions. [2021-11-21 01:04:04,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-21 01:04:04,513 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:04:04,513 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:04:04,528 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-21 01:04:04,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:04:04,721 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:04:04,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:04:04,722 INFO L85 PathProgramCache]: Analyzing trace with hash 452521591, now seen corresponding path program 1 times [2021-11-21 01:04:04,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:04:04,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1844607051] [2021-11-21 01:04:04,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:04:04,723 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:04:04,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:04:04,724 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:04:04,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-21 01:04:04,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:04:04,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-21 01:04:04,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:04:05,243 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-21 01:04:05,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:04:05,529 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-21 01:04:05,529 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:04:05,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1844607051] [2021-11-21 01:04:05,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1844607051] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:04:05,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [876713370] [2021-11-21 01:04:05,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:04:05,530 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:04:05,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:04:05,538 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:04:05,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2021-11-21 01:04:05,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:04:05,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-21 01:04:05,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:04:05,749 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-21 01:04:05,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:04:06,039 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-21 01:04:06,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [876713370] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:04:06,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315060823] [2021-11-21 01:04:06,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:04:06,041 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:04:06,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:04:06,057 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:04:06,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-21 01:04:06,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:04:06,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-21 01:04:06,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:04:06,296 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-21 01:04:06,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:04:06,622 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-21 01:04:06,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315060823] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:04:06,623 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:04:06,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 9 [2021-11-21 01:04:06,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560394316] [2021-11-21 01:04:06,623 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:04:06,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-21 01:04:06,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:04:06,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-21 01:04:06,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-21 01:04:06,625 INFO L87 Difference]: Start difference. First operand 62 states and 81 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-21 01:04:07,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:04:07,167 INFO L93 Difference]: Finished difference Result 122 states and 160 transitions. [2021-11-21 01:04:07,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-21 01:04:07,170 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2021-11-21 01:04:07,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:04:07,173 INFO L225 Difference]: With dead ends: 122 [2021-11-21 01:04:07,173 INFO L226 Difference]: Without dead ends: 94 [2021-11-21 01:04:07,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-21 01:04:07,175 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 26 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:04:07,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 508 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 01:04:07,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-11-21 01:04:07,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 72. [2021-11-21 01:04:07,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 56 states have internal predecessors, (69), 11 states have call successors, (11), 5 states have call predecessors, (11), 6 states have return successors, (14), 10 states have call predecessors, (14), 10 states have call successors, (14) [2021-11-21 01:04:07,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 94 transitions. [2021-11-21 01:04:07,201 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 94 transitions. Word has length 36 [2021-11-21 01:04:07,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:04:07,202 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 94 transitions. [2021-11-21 01:04:07,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-21 01:04:07,202 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 94 transitions. [2021-11-21 01:04:07,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-21 01:04:07,205 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:04:07,205 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:04:07,245 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-21 01:04:07,428 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-21 01:04:07,622 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2021-11-21 01:04:07,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt [2021-11-21 01:04:07,821 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:04:07,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:04:07,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1328087799, now seen corresponding path program 1 times [2021-11-21 01:04:07,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:04:07,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1362775850] [2021-11-21 01:04:07,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:04:07,822 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:04:07,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:04:07,822 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:04:07,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-21 01:04:07,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:04:07,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-21 01:04:07,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:04:08,272 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-21 01:04:08,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:04:08,583 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-21 01:04:08,584 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:04:08,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1362775850] [2021-11-21 01:04:08,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1362775850] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:04:08,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1333412806] [2021-11-21 01:04:08,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:04:08,585 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:04:08,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:04:08,589 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:04:08,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-21 01:04:08,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:04:08,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-21 01:04:08,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:04:09,159 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-21 01:04:09,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:04:09,452 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-21 01:04:09,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1333412806] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:04:09,453 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-21 01:04:09,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [8, 8] total 12 [2021-11-21 01:04:09,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65770928] [2021-11-21 01:04:09,453 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:04:09,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-21 01:04:09,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:04:09,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-21 01:04:09,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-11-21 01:04:09,455 INFO L87 Difference]: Start difference. First operand 72 states and 94 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 7 states have internal predecessors, (25), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-21 01:04:10,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:04:10,030 INFO L93 Difference]: Finished difference Result 115 states and 149 transitions. [2021-11-21 01:04:10,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-21 01:04:10,032 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 7 states have internal predecessors, (25), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 40 [2021-11-21 01:04:10,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:04:10,035 INFO L225 Difference]: With dead ends: 115 [2021-11-21 01:04:10,035 INFO L226 Difference]: Without dead ends: 92 [2021-11-21 01:04:10,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-11-21 01:04:10,037 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 19 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:04:10,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 531 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 01:04:10,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-11-21 01:04:10,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 80. [2021-11-21 01:04:10,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 60 states have (on average 1.2666666666666666) internal successors, (76), 62 states have internal predecessors, (76), 12 states have call successors, (12), 6 states have call predecessors, (12), 7 states have return successors, (15), 11 states have call predecessors, (15), 11 states have call successors, (15) [2021-11-21 01:04:10,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 103 transitions. [2021-11-21 01:04:10,052 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 103 transitions. Word has length 40 [2021-11-21 01:04:10,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:04:10,053 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 103 transitions. [2021-11-21 01:04:10,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 7 states have internal predecessors, (25), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-21 01:04:10,053 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 103 transitions. [2021-11-21 01:04:10,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-21 01:04:10,056 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:04:10,056 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:04:10,071 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-21 01:04:10,270 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-11-21 01:04:10,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt [2021-11-21 01:04:10,470 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:04:10,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:04:10,471 INFO L85 PathProgramCache]: Analyzing trace with hash 78255138, now seen corresponding path program 2 times [2021-11-21 01:04:10,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:04:10,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1266740535] [2021-11-21 01:04:10,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 01:04:10,472 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:04:10,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:04:10,473 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:04:10,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-21 01:04:10,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-21 01:04:10,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:04:10,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-21 01:04:10,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:04:11,018 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-21 01:04:11,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:04:11,421 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-21 01:04:11,421 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:04:11,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1266740535] [2021-11-21 01:04:11,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1266740535] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:04:11,422 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:04:11,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2021-11-21 01:04:11,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848589699] [2021-11-21 01:04:11,423 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:04:11,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-21 01:04:11,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:04:11,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-21 01:04:11,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-21 01:04:11,424 INFO L87 Difference]: Start difference. First operand 80 states and 103 transitions. Second operand has 10 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-21 01:04:12,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:04:12,079 INFO L93 Difference]: Finished difference Result 115 states and 147 transitions. [2021-11-21 01:04:12,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-21 01:04:12,080 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2021-11-21 01:04:12,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:04:12,082 INFO L225 Difference]: With dead ends: 115 [2021-11-21 01:04:12,082 INFO L226 Difference]: Without dead ends: 113 [2021-11-21 01:04:12,083 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-11-21 01:04:12,084 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 38 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:04:12,084 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 468 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 74 Invalid, 0 Unknown, 8 Unchecked, 0.4s Time] [2021-11-21 01:04:12,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-11-21 01:04:12,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 84. [2021-11-21 01:04:12,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 63 states have (on average 1.253968253968254) internal successors, (79), 65 states have internal predecessors, (79), 12 states have call successors, (12), 7 states have call predecessors, (12), 8 states have return successors, (15), 11 states have call predecessors, (15), 11 states have call successors, (15) [2021-11-21 01:04:12,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 106 transitions. [2021-11-21 01:04:12,102 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 106 transitions. Word has length 40 [2021-11-21 01:04:12,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:04:12,103 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 106 transitions. [2021-11-21 01:04:12,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-21 01:04:12,103 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 106 transitions. [2021-11-21 01:04:12,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-21 01:04:12,106 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:04:12,106 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:04:12,132 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-11-21 01:04:12,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:04:12,320 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:04:12,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:04:12,320 INFO L85 PathProgramCache]: Analyzing trace with hash 463941786, now seen corresponding path program 1 times [2021-11-21 01:04:12,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:04:12,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [475130725] [2021-11-21 01:04:12,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:04:12,321 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:04:12,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:04:12,321 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:04:12,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-21 01:04:12,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:04:12,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-21 01:04:12,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:04:12,808 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-21 01:04:12,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:04:13,322 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-21 01:04:13,322 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:04:13,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [475130725] [2021-11-21 01:04:13,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [475130725] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:04:13,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [948274696] [2021-11-21 01:04:13,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:04:13,323 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:04:13,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:04:13,325 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:04:13,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-21 01:04:13,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:04:13,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-21 01:04:13,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:04:13,611 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-21 01:04:13,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:04:14,060 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-21 01:04:14,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [948274696] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:04:14,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080888802] [2021-11-21 01:04:14,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:04:14,061 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:04:14,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:04:14,069 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:04:14,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-21 01:04:14,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:04:14,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-21 01:04:14,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:04:14,350 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-21 01:04:14,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:04:14,774 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-21 01:04:14,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080888802] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:04:14,774 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:04:14,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 9 [2021-11-21 01:04:14,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861535341] [2021-11-21 01:04:14,775 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:04:14,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-21 01:04:14,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:04:14,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-21 01:04:14,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-21 01:04:14,777 INFO L87 Difference]: Start difference. First operand 84 states and 106 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 01:04:15,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:04:15,358 INFO L93 Difference]: Finished difference Result 130 states and 169 transitions. [2021-11-21 01:04:15,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-21 01:04:15,359 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 45 [2021-11-21 01:04:15,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:04:15,361 INFO L225 Difference]: With dead ends: 130 [2021-11-21 01:04:15,361 INFO L226 Difference]: Without dead ends: 119 [2021-11-21 01:04:15,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-11-21 01:04:15,363 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 53 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:04:15,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 457 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-21 01:04:15,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-11-21 01:04:15,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 98. [2021-11-21 01:04:15,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 72 states have (on average 1.2361111111111112) internal successors, (89), 76 states have internal predecessors, (89), 15 states have call successors, (15), 7 states have call predecessors, (15), 10 states have return successors, (21), 14 states have call predecessors, (21), 14 states have call successors, (21) [2021-11-21 01:04:15,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 125 transitions. [2021-11-21 01:04:15,384 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 125 transitions. Word has length 45 [2021-11-21 01:04:15,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:04:15,385 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 125 transitions. [2021-11-21 01:04:15,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 01:04:15,386 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 125 transitions. [2021-11-21 01:04:15,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-21 01:04:15,388 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:04:15,389 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:04:15,400 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-11-21 01:04:15,614 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-21 01:04:15,800 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-21 01:04:15,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:04:15,992 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:04:15,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:04:15,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1165006364, now seen corresponding path program 1 times [2021-11-21 01:04:15,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:04:15,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1003027476] [2021-11-21 01:04:15,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:04:15,993 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:04:15,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:04:15,994 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:04:15,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-21 01:04:16,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:04:16,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-21 01:04:16,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:04:16,635 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-21 01:04:16,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:04:17,519 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-21 01:04:17,520 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:04:17,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1003027476] [2021-11-21 01:04:17,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1003027476] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:04:17,521 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:04:17,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11, 11] imperfect sequences [] total 14 [2021-11-21 01:04:17,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30366939] [2021-11-21 01:04:17,521 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:04:17,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-21 01:04:17,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:04:17,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-21 01:04:17,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-11-21 01:04:17,523 INFO L87 Difference]: Start difference. First operand 98 states and 125 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 12 states have internal predecessors, (34), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-21 01:04:18,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:04:18,870 INFO L93 Difference]: Finished difference Result 134 states and 171 transitions. [2021-11-21 01:04:18,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-21 01:04:18,871 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 12 states have internal predecessors, (34), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) Word has length 45 [2021-11-21 01:04:18,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:04:18,873 INFO L225 Difference]: With dead ends: 134 [2021-11-21 01:04:18,873 INFO L226 Difference]: Without dead ends: 127 [2021-11-21 01:04:18,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-11-21 01:04:18,875 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 50 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 641 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-21 01:04:18,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 641 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-21 01:04:18,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-11-21 01:04:18,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 100. [2021-11-21 01:04:18,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 74 states have (on average 1.2297297297297298) internal successors, (91), 77 states have internal predecessors, (91), 15 states have call successors, (15), 7 states have call predecessors, (15), 10 states have return successors, (21), 15 states have call predecessors, (21), 14 states have call successors, (21) [2021-11-21 01:04:18,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 127 transitions. [2021-11-21 01:04:18,895 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 127 transitions. Word has length 45 [2021-11-21 01:04:18,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:04:18,896 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 127 transitions. [2021-11-21 01:04:18,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 12 states have internal predecessors, (34), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-21 01:04:18,896 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 127 transitions. [2021-11-21 01:04:18,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-21 01:04:18,899 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:04:18,899 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:04:18,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-21 01:04:19,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:04:19,109 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:04:19,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:04:19,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1862719454, now seen corresponding path program 1 times [2021-11-21 01:04:19,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:04:19,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1206056587] [2021-11-21 01:04:19,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:04:19,110 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:04:19,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:04:19,111 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:04:19,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-21 01:04:19,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:04:19,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-21 01:04:19,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:04:19,796 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-21 01:04:19,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:04:20,637 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-21 01:04:20,637 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:04:20,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1206056587] [2021-11-21 01:04:20,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1206056587] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:04:20,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1097879707] [2021-11-21 01:04:20,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:04:20,638 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:04:20,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:04:20,645 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:04:20,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-21 01:04:20,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:04:20,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-21 01:04:20,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:04:21,340 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-21 01:04:21,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:04:22,307 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-21 01:04:22,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1097879707] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:04:22,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545790256] [2021-11-21 01:04:22,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:04:22,308 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:04:22,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:04:22,313 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:04:22,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-21 01:04:22,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:04:22,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-21 01:04:22,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:04:22,578 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-21 01:04:22,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:04:23,100 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-21 01:04:23,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545790256] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:04:23,101 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:04:23,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10, 10, 11, 11] total 21 [2021-11-21 01:04:23,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454714729] [2021-11-21 01:04:23,101 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:04:23,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-21 01:04:23,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:04:23,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-21 01:04:23,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2021-11-21 01:04:23,103 INFO L87 Difference]: Start difference. First operand 100 states and 127 transitions. Second operand has 21 states, 19 states have (on average 2.526315789473684) internal successors, (48), 17 states have internal predecessors, (48), 6 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (12), 7 states have call predecessors, (12), 5 states have call successors, (12) [2021-11-21 01:04:26,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:04:26,007 INFO L93 Difference]: Finished difference Result 178 states and 230 transitions. [2021-11-21 01:04:26,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-21 01:04:26,008 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.526315789473684) internal successors, (48), 17 states have internal predecessors, (48), 6 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (12), 7 states have call predecessors, (12), 5 states have call successors, (12) Word has length 47 [2021-11-21 01:04:26,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:04:26,010 INFO L225 Difference]: With dead ends: 178 [2021-11-21 01:04:26,011 INFO L226 Difference]: Without dead ends: 149 [2021-11-21 01:04:26,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=132, Invalid=798, Unknown=0, NotChecked=0, Total=930 [2021-11-21 01:04:26,013 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 91 mSDsluCounter, 1119 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 1194 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-21 01:04:26,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 1194 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 446 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-11-21 01:04:26,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-11-21 01:04:26,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 124. [2021-11-21 01:04:26,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 93 states have (on average 1.2043010752688172) internal successors, (112), 95 states have internal predecessors, (112), 18 states have call successors, (18), 9 states have call predecessors, (18), 12 states have return successors, (29), 19 states have call predecessors, (29), 17 states have call successors, (29) [2021-11-21 01:04:26,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 159 transitions. [2021-11-21 01:04:26,029 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 159 transitions. Word has length 47 [2021-11-21 01:04:26,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:04:26,030 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 159 transitions. [2021-11-21 01:04:26,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.526315789473684) internal successors, (48), 17 states have internal predecessors, (48), 6 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (12), 7 states have call predecessors, (12), 5 states have call successors, (12) [2021-11-21 01:04:26,030 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 159 transitions. [2021-11-21 01:04:26,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-21 01:04:26,033 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:04:26,033 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:04:26,061 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-21 01:04:26,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-21 01:04:26,465 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2021-11-21 01:04:26,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt [2021-11-21 01:04:26,664 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:04:26,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:04:26,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1805461152, now seen corresponding path program 1 times [2021-11-21 01:04:26,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:04:26,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1511210870] [2021-11-21 01:04:26,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:04:26,665 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:04:26,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:04:26,666 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:04:26,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-21 01:04:26,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:04:26,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 01:04:26,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:04:26,977 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-21 01:04:26,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:04:27,167 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-21 01:04:27,167 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:04:27,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1511210870] [2021-11-21 01:04:27,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1511210870] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:04:27,167 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:04:27,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2021-11-21 01:04:27,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022202852] [2021-11-21 01:04:27,168 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:04:27,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 01:04:27,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:04:27,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 01:04:27,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:04:27,169 INFO L87 Difference]: Start difference. First operand 124 states and 159 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-21 01:04:27,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:04:27,413 INFO L93 Difference]: Finished difference Result 132 states and 166 transitions. [2021-11-21 01:04:27,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 01:04:27,414 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 47 [2021-11-21 01:04:27,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:04:27,416 INFO L225 Difference]: With dead ends: 132 [2021-11-21 01:04:27,416 INFO L226 Difference]: Without dead ends: 111 [2021-11-21 01:04:27,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-21 01:04:27,418 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 9 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:04:27,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 380 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:04:27,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-11-21 01:04:27,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2021-11-21 01:04:27,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 83 states have (on average 1.1927710843373494) internal successors, (99), 86 states have internal predecessors, (99), 16 states have call successors, (16), 8 states have call predecessors, (16), 11 states have return successors, (25), 16 states have call predecessors, (25), 15 states have call successors, (25) [2021-11-21 01:04:27,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 140 transitions. [2021-11-21 01:04:27,430 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 140 transitions. Word has length 47 [2021-11-21 01:04:27,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:04:27,430 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 140 transitions. [2021-11-21 01:04:27,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-21 01:04:27,431 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 140 transitions. [2021-11-21 01:04:27,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-21 01:04:27,432 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:04:27,433 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:04:27,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-21 01:04:27,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:04:27,646 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:04:27,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:04:27,646 INFO L85 PathProgramCache]: Analyzing trace with hash 2144611077, now seen corresponding path program 1 times [2021-11-21 01:04:27,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:04:27,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [679489450] [2021-11-21 01:04:27,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:04:27,647 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:04:27,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:04:27,648 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:04:27,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-21 01:04:27,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:04:27,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-21 01:04:27,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:04:28,505 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-21 01:04:28,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:04:30,348 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-21 01:04:30,348 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:04:30,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [679489450] [2021-11-21 01:04:30,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [679489450] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:04:30,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [913119586] [2021-11-21 01:04:30,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:04:30,349 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:04:30,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:04:30,349 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:04:30,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-21 01:04:30,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:04:30,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-21 01:04:30,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:04:30,622 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-21 01:04:30,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:04:31,162 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-21 01:04:31,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [913119586] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:04:31,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095927130] [2021-11-21 01:04:31,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:04:31,163 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:04:31,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:04:31,168 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:04:31,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-21 01:04:31,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:04:31,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-21 01:04:31,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:04:31,452 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-21 01:04:31,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:04:32,120 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-21 01:04:32,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095927130] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:04:32,121 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:04:32,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 13, 13] total 24 [2021-11-21 01:04:32,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777940507] [2021-11-21 01:04:32,122 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:04:32,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-21 01:04:32,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:04:32,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-21 01:04:32,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2021-11-21 01:04:32,123 INFO L87 Difference]: Start difference. First operand 111 states and 140 transitions. Second operand has 24 states, 22 states have (on average 2.0) internal successors, (44), 20 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-21 01:04:36,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:04:36,591 INFO L93 Difference]: Finished difference Result 157 states and 214 transitions. [2021-11-21 01:04:36,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-21 01:04:36,594 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.0) internal successors, (44), 20 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 49 [2021-11-21 01:04:36,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:04:36,596 INFO L225 Difference]: With dead ends: 157 [2021-11-21 01:04:36,596 INFO L226 Difference]: Without dead ends: 123 [2021-11-21 01:04:36,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=199, Invalid=1361, Unknown=0, NotChecked=0, Total=1560 [2021-11-21 01:04:36,598 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 120 mSDsluCounter, 1075 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 1147 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:04:36,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 1147 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 510 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-11-21 01:04:36,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-11-21 01:04:36,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 100. [2021-11-21 01:04:36,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 74 states have (on average 1.2027027027027026) internal successors, (89), 79 states have internal predecessors, (89), 14 states have call successors, (14), 6 states have call predecessors, (14), 11 states have return successors, (32), 14 states have call predecessors, (32), 13 states have call successors, (32) [2021-11-21 01:04:36,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 135 transitions. [2021-11-21 01:04:36,614 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 135 transitions. Word has length 49 [2021-11-21 01:04:36,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:04:36,615 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 135 transitions. [2021-11-21 01:04:36,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 2.0) internal successors, (44), 20 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-21 01:04:36,616 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 135 transitions. [2021-11-21 01:04:36,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-21 01:04:36,617 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:04:36,617 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:04:36,630 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2021-11-21 01:04:36,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-21 01:04:37,038 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-21 01:04:37,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:04:37,231 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:04:37,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:04:37,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1400781647, now seen corresponding path program 2 times [2021-11-21 01:04:37,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:04:37,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1650379385] [2021-11-21 01:04:37,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 01:04:37,232 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:04:37,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:04:37,233 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:04:37,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-21 01:04:37,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 01:04:37,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:04:37,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-21 01:04:37,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:04:38,089 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-21 01:04:38,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:04:40,037 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-21 01:04:40,037 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:04:40,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1650379385] [2021-11-21 01:04:40,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1650379385] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:04:40,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1343491808] [2021-11-21 01:04:40,037 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 01:04:40,037 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:04:40,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:04:40,038 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:04:40,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-21 01:04:40,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 01:04:40,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:04:40,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-21 01:04:40,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:04:40,300 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-21 01:04:40,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:04:40,832 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-21 01:04:40,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1343491808] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:04:40,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943648591] [2021-11-21 01:04:40,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 01:04:40,833 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:04:40,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:04:40,841 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:04:40,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-21 01:04:40,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 01:04:40,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:04:40,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-21 01:04:40,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:04:41,134 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-21 01:04:41,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:04:41,674 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-21 01:04:41,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943648591] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:04:41,674 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:04:41,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 13, 13] total 24 [2021-11-21 01:04:41,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674010254] [2021-11-21 01:04:41,675 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:04:41,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-21 01:04:41,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:04:41,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-21 01:04:41,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2021-11-21 01:04:41,677 INFO L87 Difference]: Start difference. First operand 100 states and 135 transitions. Second operand has 24 states, 22 states have (on average 2.0) internal successors, (44), 20 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-21 01:04:45,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:04:45,870 INFO L93 Difference]: Finished difference Result 138 states and 187 transitions. [2021-11-21 01:04:45,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-21 01:04:45,870 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.0) internal successors, (44), 20 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 49 [2021-11-21 01:04:45,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:04:45,872 INFO L225 Difference]: With dead ends: 138 [2021-11-21 01:04:45,873 INFO L226 Difference]: Without dead ends: 111 [2021-11-21 01:04:45,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=184, Invalid=1298, Unknown=0, NotChecked=0, Total=1482 [2021-11-21 01:04:45,875 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 158 mSDsluCounter, 1008 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 1080 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:04:45,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 1080 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-11-21 01:04:45,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-11-21 01:04:45,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 84. [2021-11-21 01:04:45,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 62 states have (on average 1.2419354838709677) internal successors, (77), 67 states have internal predecessors, (77), 12 states have call successors, (12), 4 states have call predecessors, (12), 9 states have return successors, (28), 12 states have call predecessors, (28), 11 states have call successors, (28) [2021-11-21 01:04:45,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 117 transitions. [2021-11-21 01:04:45,890 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 117 transitions. Word has length 49 [2021-11-21 01:04:45,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:04:45,891 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 117 transitions. [2021-11-21 01:04:45,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 2.0) internal successors, (44), 20 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-21 01:04:45,891 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 117 transitions. [2021-11-21 01:04:45,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-21 01:04:45,892 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:04:45,893 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:04:45,911 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-21 01:04:46,127 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-11-21 01:04:46,308 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-11-21 01:04:46,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt [2021-11-21 01:04:46,507 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:04:46,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:04:46,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1227181886, now seen corresponding path program 1 times [2021-11-21 01:04:46,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:04:46,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [721077358] [2021-11-21 01:04:46,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:04:46,508 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:04:46,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:04:46,510 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:04:46,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-21 01:04:46,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:04:46,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 01:04:46,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:04:48,137 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-21 01:04:48,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:04:49,112 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-21 01:04:49,112 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:04:49,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [721077358] [2021-11-21 01:04:49,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [721077358] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:04:49,113 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:04:49,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 14 [2021-11-21 01:04:49,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928955042] [2021-11-21 01:04:49,114 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:04:49,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-21 01:04:49,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:04:49,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-21 01:04:49,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-11-21 01:04:49,115 INFO L87 Difference]: Start difference. First operand 84 states and 117 transitions. Second operand has 14 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 5 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-21 01:04:49,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:04:49,278 INFO L93 Difference]: Finished difference Result 91 states and 124 transitions. [2021-11-21 01:04:49,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-21 01:04:49,279 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 5 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 50 [2021-11-21 01:04:49,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:04:49,280 INFO L225 Difference]: With dead ends: 91 [2021-11-21 01:04:49,280 INFO L226 Difference]: Without dead ends: 89 [2021-11-21 01:04:49,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-11-21 01:04:49,281 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 8 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:04:49,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 462 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 14 Unchecked, 0.1s Time] [2021-11-21 01:04:49,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-11-21 01:04:49,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-11-21 01:04:49,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 65 states have (on average 1.2307692307692308) internal successors, (80), 71 states have internal predecessors, (80), 13 states have call successors, (13), 5 states have call predecessors, (13), 10 states have return successors, (29), 12 states have call predecessors, (29), 12 states have call successors, (29) [2021-11-21 01:04:49,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 122 transitions. [2021-11-21 01:04:49,295 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 122 transitions. Word has length 50 [2021-11-21 01:04:49,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:04:49,295 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 122 transitions. [2021-11-21 01:04:49,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 5 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-21 01:04:49,296 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 122 transitions. [2021-11-21 01:04:49,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-21 01:04:49,297 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:04:49,298 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:04:49,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-21 01:04:49,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:04:49,513 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:04:49,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:04:49,514 INFO L85 PathProgramCache]: Analyzing trace with hash 381005423, now seen corresponding path program 1 times [2021-11-21 01:04:49,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:04:49,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1768020633] [2021-11-21 01:04:49,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:04:49,515 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:04:49,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:04:49,516 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:04:49,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-21 01:04:49,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:04:49,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 01:04:49,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:04:56,390 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-21 01:04:56,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:04:57,108 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-21 01:04:57,108 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:04:57,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1768020633] [2021-11-21 01:04:57,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1768020633] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:04:57,109 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:04:57,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 14 [2021-11-21 01:04:57,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320719824] [2021-11-21 01:04:57,109 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:04:57,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-21 01:04:57,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:04:57,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-21 01:04:57,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=135, Unknown=3, NotChecked=0, Total=182 [2021-11-21 01:04:57,111 INFO L87 Difference]: Start difference. First operand 89 states and 122 transitions. Second operand has 14 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 5 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-21 01:04:57,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:04:57,227 INFO L93 Difference]: Finished difference Result 95 states and 127 transitions. [2021-11-21 01:04:57,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-21 01:04:57,228 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 5 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 51 [2021-11-21 01:04:57,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:04:57,229 INFO L225 Difference]: With dead ends: 95 [2021-11-21 01:04:57,229 INFO L226 Difference]: Without dead ends: 91 [2021-11-21 01:04:57,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=50, Invalid=157, Unknown=3, NotChecked=0, Total=210 [2021-11-21 01:04:57,231 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 16 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:04:57,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 377 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 16 Unchecked, 0.0s Time] [2021-11-21 01:04:57,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-11-21 01:04:57,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 86. [2021-11-21 01:04:57,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 64 states have (on average 1.21875) internal successors, (78), 68 states have internal predecessors, (78), 12 states have call successors, (12), 5 states have call predecessors, (12), 9 states have return successors, (28), 12 states have call predecessors, (28), 11 states have call successors, (28) [2021-11-21 01:04:57,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 118 transitions. [2021-11-21 01:04:57,243 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 118 transitions. Word has length 51 [2021-11-21 01:04:57,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:04:57,243 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 118 transitions. [2021-11-21 01:04:57,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 5 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-21 01:04:57,244 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 118 transitions. [2021-11-21 01:04:57,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-21 01:04:57,245 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:04:57,245 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:04:57,259 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2021-11-21 01:04:57,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:04:57,457 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:04:57,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:04:57,457 INFO L85 PathProgramCache]: Analyzing trace with hash 57968830, now seen corresponding path program 1 times [2021-11-21 01:04:57,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:04:57,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [638359002] [2021-11-21 01:04:57,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:04:57,458 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:04:57,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:04:57,459 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:04:57,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-21 01:04:57,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:04:57,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 01:04:57,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:04:57,932 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-21 01:04:57,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:04:58,645 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-21 01:04:58,645 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:04:58,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [638359002] [2021-11-21 01:04:58,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [638359002] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:04:58,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [809650146] [2021-11-21 01:04:58,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:04:58,646 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:04:58,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:04:58,647 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:04:58,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-11-21 01:04:58,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:04:58,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-21 01:04:58,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:04:59,199 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-21 01:04:59,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:05:00,137 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-21 01:05:00,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [809650146] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:05:00,137 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-21 01:05:00,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 7] imperfect sequences [8, 8] total 18 [2021-11-21 01:05:00,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493555643] [2021-11-21 01:05:00,138 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:05:00,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-21 01:05:00,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:05:00,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-21 01:05:00,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-11-21 01:05:00,140 INFO L87 Difference]: Start difference. First operand 86 states and 118 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-21 01:05:00,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:05:00,467 INFO L93 Difference]: Finished difference Result 118 states and 176 transitions. [2021-11-21 01:05:00,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:05:00,468 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 55 [2021-11-21 01:05:00,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:05:00,470 INFO L225 Difference]: With dead ends: 118 [2021-11-21 01:05:00,470 INFO L226 Difference]: Without dead ends: 107 [2021-11-21 01:05:00,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-11-21 01:05:00,472 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 90 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:05:00,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 234 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 01:05:00,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-11-21 01:05:00,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 100. [2021-11-21 01:05:00,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 73 states have (on average 1.2191780821917808) internal successors, (89), 79 states have internal predecessors, (89), 15 states have call successors, (15), 5 states have call predecessors, (15), 11 states have return successors, (44), 15 states have call predecessors, (44), 14 states have call successors, (44) [2021-11-21 01:05:00,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 148 transitions. [2021-11-21 01:05:00,485 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 148 transitions. Word has length 55 [2021-11-21 01:05:00,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:05:00,486 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 148 transitions. [2021-11-21 01:05:00,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-21 01:05:00,486 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 148 transitions. [2021-11-21 01:05:00,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-21 01:05:00,488 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:05:00,489 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:05:00,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2021-11-21 01:05:00,700 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2021-11-21 01:05:00,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:05:00,891 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:05:00,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:05:00,891 INFO L85 PathProgramCache]: Analyzing trace with hash -571789227, now seen corresponding path program 1 times [2021-11-21 01:05:00,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:05:00,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2137269556] [2021-11-21 01:05:00,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:05:00,892 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:05:00,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:05:00,893 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:05:00,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-21 01:05:00,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:05:00,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 01:05:00,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:05:01,464 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-21 01:05:01,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:05:02,351 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-21 01:05:02,351 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:05:02,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2137269556] [2021-11-21 01:05:02,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2137269556] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:05:02,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1662400832] [2021-11-21 01:05:02,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:05:02,352 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:05:02,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:05:02,353 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:05:02,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-11-21 01:05:02,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:05:02,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 01:05:02,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:05:02,735 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-21 01:05:02,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:05:03,345 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-21 01:05:03,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1662400832] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:05:03,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264856814] [2021-11-21 01:05:03,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:05:03,346 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:05:03,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:05:03,351 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:05:03,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-21 01:05:03,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:05:03,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 01:05:03,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:05:03,673 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-21 01:05:03,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:05:04,226 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-21 01:05:04,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264856814] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:05:04,226 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:05:04,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 11 [2021-11-21 01:05:04,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137087669] [2021-11-21 01:05:04,227 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:05:04,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-21 01:05:04,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:05:04,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-21 01:05:04,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-11-21 01:05:04,229 INFO L87 Difference]: Start difference. First operand 100 states and 148 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-21 01:05:04,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:05:04,985 INFO L93 Difference]: Finished difference Result 114 states and 166 transitions. [2021-11-21 01:05:04,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 01:05:04,986 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 64 [2021-11-21 01:05:04,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:05:04,988 INFO L225 Difference]: With dead ends: 114 [2021-11-21 01:05:04,988 INFO L226 Difference]: Without dead ends: 103 [2021-11-21 01:05:04,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 369 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-11-21 01:05:04,990 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 128 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:05:04,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 395 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-21 01:05:04,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-11-21 01:05:05,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2021-11-21 01:05:05,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 75 states have (on average 1.2133333333333334) internal successors, (91), 82 states have internal predecessors, (91), 15 states have call successors, (15), 5 states have call predecessors, (15), 12 states have return successors, (46), 15 states have call predecessors, (46), 14 states have call successors, (46) [2021-11-21 01:05:05,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 152 transitions. [2021-11-21 01:05:05,010 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 152 transitions. Word has length 64 [2021-11-21 01:05:05,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:05:05,010 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 152 transitions. [2021-11-21 01:05:05,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-21 01:05:05,011 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 152 transitions. [2021-11-21 01:05:05,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-21 01:05:05,013 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:05:05,013 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:05:05,064 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-21 01:05:05,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-21 01:05:05,438 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (30)] Ended with exit code 0 [2021-11-21 01:05:05,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt [2021-11-21 01:05:05,636 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:05:05,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:05:05,637 INFO L85 PathProgramCache]: Analyzing trace with hash -768011691, now seen corresponding path program 2 times [2021-11-21 01:05:05,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:05:05,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [550051076] [2021-11-21 01:05:05,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 01:05:05,637 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:05:05,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:05:05,638 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:05:05,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-21 01:05:05,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 01:05:05,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:05:05,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 01:05:05,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:05:06,152 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-21 01:05:06,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:05:07,044 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-21 01:05:07,045 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:05:07,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [550051076] [2021-11-21 01:05:07,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [550051076] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:05:07,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [497579837] [2021-11-21 01:05:07,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 01:05:07,046 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:05:07,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:05:07,057 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:05:07,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2021-11-21 01:05:07,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 01:05:07,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:05:07,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-21 01:05:07,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:05:07,432 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-21 01:05:07,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:05:07,974 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-21 01:05:07,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [497579837] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:05:07,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176821255] [2021-11-21 01:05:07,975 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 01:05:07,975 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:05:07,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:05:07,976 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:05:07,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-21 01:05:08,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 01:05:08,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:05:08,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 01:05:08,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:05:08,296 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-21 01:05:08,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:05:08,918 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-21 01:05:08,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176821255] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:05:08,919 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:05:08,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 11 [2021-11-21 01:05:08,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919733948] [2021-11-21 01:05:08,919 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:05:08,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-21 01:05:08,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:05:08,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-21 01:05:08,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-11-21 01:05:08,921 INFO L87 Difference]: Start difference. First operand 103 states and 152 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-21 01:05:09,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:05:09,801 INFO L93 Difference]: Finished difference Result 116 states and 170 transitions. [2021-11-21 01:05:09,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-21 01:05:09,802 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 64 [2021-11-21 01:05:09,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:05:09,804 INFO L225 Difference]: With dead ends: 116 [2021-11-21 01:05:09,805 INFO L226 Difference]: Without dead ends: 103 [2021-11-21 01:05:09,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 369 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-11-21 01:05:09,806 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 125 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:05:09,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 459 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-21 01:05:09,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-11-21 01:05:09,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2021-11-21 01:05:09,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 75 states have (on average 1.2133333333333334) internal successors, (91), 82 states have internal predecessors, (91), 15 states have call successors, (15), 5 states have call predecessors, (15), 12 states have return successors, (45), 15 states have call predecessors, (45), 14 states have call successors, (45) [2021-11-21 01:05:09,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 151 transitions. [2021-11-21 01:05:09,820 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 151 transitions. Word has length 64 [2021-11-21 01:05:09,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:05:09,821 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 151 transitions. [2021-11-21 01:05:09,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-21 01:05:09,821 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 151 transitions. [2021-11-21 01:05:09,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-21 01:05:09,823 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:05:09,823 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:05:09,840 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-11-21 01:05:10,041 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2021-11-21 01:05:10,266 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-11-21 01:05:10,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:05:10,440 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:05:10,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:05:10,441 INFO L85 PathProgramCache]: Analyzing trace with hash 336770129, now seen corresponding path program 1 times [2021-11-21 01:05:10,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:05:10,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1547223729] [2021-11-21 01:05:10,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:05:10,442 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:05:10,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:05:10,442 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:05:10,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-21 01:05:10,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:05:10,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 01:05:10,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:05:11,024 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-21 01:05:11,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:05:11,882 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-21 01:05:11,882 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:05:11,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1547223729] [2021-11-21 01:05:11,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1547223729] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:05:11,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1861612056] [2021-11-21 01:05:11,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:05:11,883 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:05:11,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:05:11,886 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:05:11,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2021-11-21 01:05:11,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:05:11,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 01:05:11,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:05:12,233 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-21 01:05:12,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:05:12,861 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-21 01:05:12,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1861612056] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:05:12,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421976777] [2021-11-21 01:05:12,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:05:12,862 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:05:12,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:05:12,863 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:05:12,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-21 01:05:12,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:05:12,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 01:05:12,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:05:13,255 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-21 01:05:13,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:05:13,877 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-21 01:05:13,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421976777] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:05:13,878 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:05:13,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 11 [2021-11-21 01:05:13,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870173052] [2021-11-21 01:05:13,878 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:05:13,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-21 01:05:13,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:05:13,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-21 01:05:13,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-11-21 01:05:13,880 INFO L87 Difference]: Start difference. First operand 103 states and 151 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 11 states have internal predecessors, (48), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-21 01:05:14,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:05:14,647 INFO L93 Difference]: Finished difference Result 114 states and 162 transitions. [2021-11-21 01:05:14,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-21 01:05:14,647 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 11 states have internal predecessors, (48), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 66 [2021-11-21 01:05:14,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:05:14,649 INFO L225 Difference]: With dead ends: 114 [2021-11-21 01:05:14,649 INFO L226 Difference]: Without dead ends: 100 [2021-11-21 01:05:14,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 381 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-11-21 01:05:14,651 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 115 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:05:14,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 501 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 01:05:14,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-11-21 01:05:14,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2021-11-21 01:05:14,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 73 states have (on average 1.2054794520547945) internal successors, (88), 79 states have internal predecessors, (88), 15 states have call successors, (15), 5 states have call predecessors, (15), 11 states have return successors, (41), 15 states have call predecessors, (41), 14 states have call successors, (41) [2021-11-21 01:05:14,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 144 transitions. [2021-11-21 01:05:14,664 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 144 transitions. Word has length 66 [2021-11-21 01:05:14,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:05:14,665 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 144 transitions. [2021-11-21 01:05:14,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 11 states have internal predecessors, (48), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-21 01:05:14,665 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 144 transitions. [2021-11-21 01:05:14,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-21 01:05:14,668 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:05:14,668 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:05:14,680 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (35)] Ended with exit code 0 [2021-11-21 01:05:14,874 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (36)] Forceful destruction successful, exit code 0 [2021-11-21 01:05:15,099 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2021-11-21 01:05:15,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:05:15,273 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:05:15,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:05:15,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1198335757, now seen corresponding path program 2 times [2021-11-21 01:05:15,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:05:15,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [414151654] [2021-11-21 01:05:15,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 01:05:15,275 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:05:15,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:05:15,276 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:05:15,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-11-21 01:05:15,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 01:05:15,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:05:15,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 01:05:15,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:05:15,921 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-21 01:05:15,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:05:16,794 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-21 01:05:16,794 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:05:16,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [414151654] [2021-11-21 01:05:16,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [414151654] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:05:16,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [863538890] [2021-11-21 01:05:16,795 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 01:05:16,795 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:05:16,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:05:16,796 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:05:16,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2021-11-21 01:05:16,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 01:05:16,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:05:16,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 01:05:16,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:05:17,195 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-21 01:05:17,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:05:17,837 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-21 01:05:17,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [863538890] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:05:17,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133930911] [2021-11-21 01:05:17,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 01:05:17,838 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:05:17,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:05:17,839 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:05:17,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-21 01:05:17,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 01:05:17,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:05:17,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 01:05:17,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:05:18,179 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-21 01:05:18,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:05:18,763 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-21 01:05:18,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133930911] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:05:18,763 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:05:18,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 11 [2021-11-21 01:05:18,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880305922] [2021-11-21 01:05:18,764 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:05:18,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-21 01:05:18,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:05:18,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-21 01:05:18,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-11-21 01:05:18,766 INFO L87 Difference]: Start difference. First operand 100 states and 144 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 11 states have internal predecessors, (48), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-21 01:05:19,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:05:19,461 INFO L93 Difference]: Finished difference Result 111 states and 155 transitions. [2021-11-21 01:05:19,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 01:05:19,462 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 11 states have internal predecessors, (48), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 66 [2021-11-21 01:05:19,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:05:19,463 INFO L225 Difference]: With dead ends: 111 [2021-11-21 01:05:19,464 INFO L226 Difference]: Without dead ends: 97 [2021-11-21 01:05:19,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 381 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-11-21 01:05:19,465 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 110 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:05:19,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 473 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 01:05:19,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-11-21 01:05:19,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2021-11-21 01:05:19,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 71 states have (on average 1.1971830985915493) internal successors, (85), 76 states have internal predecessors, (85), 15 states have call successors, (15), 5 states have call predecessors, (15), 10 states have return successors, (39), 15 states have call predecessors, (39), 14 states have call successors, (39) [2021-11-21 01:05:19,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 139 transitions. [2021-11-21 01:05:19,478 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 139 transitions. Word has length 66 [2021-11-21 01:05:19,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:05:19,479 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 139 transitions. [2021-11-21 01:05:19,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 11 states have internal predecessors, (48), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-21 01:05:19,479 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 139 transitions. [2021-11-21 01:05:19,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-21 01:05:19,481 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:05:19,482 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:05:19,517 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2021-11-21 01:05:19,721 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-11-21 01:05:19,898 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (39)] Forceful destruction successful, exit code 0 [2021-11-21 01:05:20,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt [2021-11-21 01:05:20,096 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:05:20,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:05:20,097 INFO L85 PathProgramCache]: Analyzing trace with hash -425811905, now seen corresponding path program 1 times [2021-11-21 01:05:20,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:05:20,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [835078542] [2021-11-21 01:05:20,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:05:20,098 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:05:20,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:05:20,100 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:05:20,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-11-21 01:05:20,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:05:20,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-21 01:05:20,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:05:21,870 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-21 01:05:21,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:05:25,769 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-21 01:05:25,770 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:05:25,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [835078542] [2021-11-21 01:05:25,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [835078542] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:05:25,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1214950693] [2021-11-21 01:05:25,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:05:25,770 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:05:25,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:05:25,771 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:05:25,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (42)] Waiting until timeout for monitored process [2021-11-21 01:05:25,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:05:25,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-21 01:05:25,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:05:29,239 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-21 01:05:29,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:05:36,649 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-21 01:05:36,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1214950693] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:05:36,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098822328] [2021-11-21 01:05:36,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:05:36,650 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:05:36,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:05:36,651 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:05:36,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-11-21 01:05:36,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:05:36,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-21 01:05:36,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:05:41,038 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-21 01:05:41,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:05:51,323 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-21 01:05:51,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098822328] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:05:51,323 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:05:51,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 16, 16, 17, 17] total 65 [2021-11-21 01:05:51,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927835674] [2021-11-21 01:05:51,324 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:05:51,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-11-21 01:05:51,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:05:51,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-11-21 01:05:51,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=447, Invalid=3713, Unknown=0, NotChecked=0, Total=4160 [2021-11-21 01:05:51,328 INFO L87 Difference]: Start difference. First operand 97 states and 139 transitions. Second operand has 65 states, 65 states have (on average 1.8153846153846154) internal successors, (118), 65 states have internal predecessors, (118), 15 states have call successors, (18), 2 states have call predecessors, (18), 8 states have return successors, (21), 15 states have call predecessors, (21), 14 states have call successors, (21) [2021-11-21 01:06:20,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:06:20,969 INFO L93 Difference]: Finished difference Result 170 states and 236 transitions. [2021-11-21 01:06:20,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-21 01:06:20,972 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.8153846153846154) internal successors, (118), 65 states have internal predecessors, (118), 15 states have call successors, (18), 2 states have call predecessors, (18), 8 states have return successors, (21), 15 states have call predecessors, (21), 14 states have call successors, (21) Word has length 73 [2021-11-21 01:06:20,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:06:20,988 INFO L225 Difference]: With dead ends: 170 [2021-11-21 01:06:20,988 INFO L226 Difference]: Without dead ends: 121 [2021-11-21 01:06:20,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 463 GetRequests, 369 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2290 ImplicationChecksByTransitivity, 39.3s TimeCoverageRelationStatistics Valid=1543, Invalid=7577, Unknown=0, NotChecked=0, Total=9120 [2021-11-21 01:06:20,993 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 368 mSDsluCounter, 1646 mSDsCounter, 0 mSdLazyCounter, 1291 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 1730 SdHoareTripleChecker+Invalid, 1539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 1291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.6s IncrementalHoareTripleChecker+Time [2021-11-21 01:06:20,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [374 Valid, 1730 Invalid, 1539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 1291 Invalid, 0 Unknown, 0 Unchecked, 11.6s Time] [2021-11-21 01:06:20,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-11-21 01:06:21,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 102. [2021-11-21 01:06:21,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 74 states have (on average 1.1891891891891893) internal successors, (88), 80 states have internal predecessors, (88), 16 states have call successors, (16), 5 states have call predecessors, (16), 11 states have return successors, (43), 16 states have call predecessors, (43), 15 states have call successors, (43) [2021-11-21 01:06:21,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 147 transitions. [2021-11-21 01:06:21,011 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 147 transitions. Word has length 73 [2021-11-21 01:06:21,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:06:21,011 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 147 transitions. [2021-11-21 01:06:21,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.8153846153846154) internal successors, (118), 65 states have internal predecessors, (118), 15 states have call successors, (18), 2 states have call predecessors, (18), 8 states have return successors, (21), 15 states have call predecessors, (21), 14 states have call successors, (21) [2021-11-21 01:06:21,012 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 147 transitions. [2021-11-21 01:06:21,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-21 01:06:21,014 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:06:21,014 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:06:21,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (42)] Forceful destruction successful, exit code 0 [2021-11-21 01:06:21,243 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-11-21 01:06:21,429 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2021-11-21 01:06:21,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:06:21,618 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:06:21,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:06:21,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1804933507, now seen corresponding path program 2 times [2021-11-21 01:06:21,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:06:21,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2059309350] [2021-11-21 01:06:21,619 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 01:06:21,619 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:06:21,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:06:21,620 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:06:21,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2021-11-21 01:06:21,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 01:06:21,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:06:21,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-21 01:06:21,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:06:23,368 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-21 01:06:23,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:06:27,188 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-21 01:06:27,188 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:06:27,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2059309350] [2021-11-21 01:06:27,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2059309350] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:06:27,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1348344363] [2021-11-21 01:06:27,189 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 01:06:27,189 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:06:27,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:06:27,192 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:06:27,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (45)] Waiting until timeout for monitored process [2021-11-21 01:06:27,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 01:06:27,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:06:27,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-21 01:06:27,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:06:30,495 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-21 01:06:30,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:06:37,395 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-21 01:06:37,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1348344363] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:06:37,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805302246] [2021-11-21 01:06:37,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 01:06:37,396 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:06:37,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:06:37,397 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:06:37,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-11-21 01:06:37,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 01:06:37,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:06:37,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-21 01:06:37,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:06:41,822 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-21 01:06:41,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:06:52,872 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-21 01:06:52,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805302246] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:06:52,873 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:06:52,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 15, 16, 17, 17] total 64 [2021-11-21 01:06:52,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994113647] [2021-11-21 01:06:52,873 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:06:52,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-11-21 01:06:52,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:06:52,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-11-21 01:06:52,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=420, Invalid=3612, Unknown=0, NotChecked=0, Total=4032 [2021-11-21 01:06:52,877 INFO L87 Difference]: Start difference. First operand 102 states and 147 transitions. Second operand has 64 states, 64 states have (on average 1.84375) internal successors, (118), 64 states have internal predecessors, (118), 15 states have call successors, (18), 2 states have call predecessors, (18), 8 states have return successors, (21), 15 states have call predecessors, (21), 14 states have call successors, (21) [2021-11-21 01:07:26,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:07:26,775 INFO L93 Difference]: Finished difference Result 180 states and 243 transitions. [2021-11-21 01:07:26,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-21 01:07:26,776 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.84375) internal successors, (118), 64 states have internal predecessors, (118), 15 states have call successors, (18), 2 states have call predecessors, (18), 8 states have return successors, (21), 15 states have call predecessors, (21), 14 states have call successors, (21) Word has length 73 [2021-11-21 01:07:26,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:07:26,782 INFO L225 Difference]: With dead ends: 180 [2021-11-21 01:07:26,782 INFO L226 Difference]: Without dead ends: 124 [2021-11-21 01:07:26,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 463 GetRequests, 370 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2216 ImplicationChecksByTransitivity, 45.0s TimeCoverageRelationStatistics Valid=1519, Invalid=7411, Unknown=0, NotChecked=0, Total=8930 [2021-11-21 01:07:26,788 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 463 mSDsluCounter, 1762 mSDsCounter, 0 mSdLazyCounter, 1212 mSolverCounterSat, 282 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 467 SdHoareTripleChecker+Valid, 1836 SdHoareTripleChecker+Invalid, 1494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 282 IncrementalHoareTripleChecker+Valid, 1212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:07:26,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [467 Valid, 1836 Invalid, 1494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [282 Valid, 1212 Invalid, 0 Unknown, 0 Unchecked, 10.5s Time] [2021-11-21 01:07:26,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-11-21 01:07:26,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 100. [2021-11-21 01:07:26,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 73 states have (on average 1.1917808219178083) internal successors, (87), 79 states have internal predecessors, (87), 15 states have call successors, (15), 5 states have call predecessors, (15), 11 states have return successors, (39), 15 states have call predecessors, (39), 14 states have call successors, (39) [2021-11-21 01:07:26,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 141 transitions. [2021-11-21 01:07:26,810 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 141 transitions. Word has length 73 [2021-11-21 01:07:26,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:07:26,810 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 141 transitions. [2021-11-21 01:07:26,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.84375) internal successors, (118), 64 states have internal predecessors, (118), 15 states have call successors, (18), 2 states have call predecessors, (18), 8 states have return successors, (21), 15 states have call predecessors, (21), 14 states have call successors, (21) [2021-11-21 01:07:26,811 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 141 transitions. [2021-11-21 01:07:26,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-21 01:07:26,813 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:07:26,813 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:07:26,830 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2021-11-21 01:07:27,032 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (45)] Ended with exit code 0 [2021-11-21 01:07:27,257 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-11-21 01:07:27,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:07:27,430 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:07:27,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:07:27,431 INFO L85 PathProgramCache]: Analyzing trace with hash 774759652, now seen corresponding path program 1 times [2021-11-21 01:07:27,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:07:27,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [653183426] [2021-11-21 01:07:27,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:07:27,432 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:07:27,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:07:27,433 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:07:27,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2021-11-21 01:07:27,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:07:27,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-21 01:07:27,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:07:28,103 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-21 01:07:28,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:07:28,719 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-21 01:07:28,720 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:07:28,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [653183426] [2021-11-21 01:07:28,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [653183426] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-21 01:07:28,720 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:07:28,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 10 [2021-11-21 01:07:28,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190252885] [2021-11-21 01:07:28,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:07:28,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 01:07:28,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:07:28,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 01:07:28,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-21 01:07:28,722 INFO L87 Difference]: Start difference. First operand 100 states and 141 transitions. Second operand has 8 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-21 01:07:28,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:07:28,983 INFO L93 Difference]: Finished difference Result 114 states and 156 transitions. [2021-11-21 01:07:28,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 01:07:28,984 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 75 [2021-11-21 01:07:28,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:07:28,986 INFO L225 Difference]: With dead ends: 114 [2021-11-21 01:07:28,986 INFO L226 Difference]: Without dead ends: 105 [2021-11-21 01:07:28,987 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 139 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-21 01:07:28,988 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 7 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:07:28,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 390 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:07:28,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-11-21 01:07:29,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 100. [2021-11-21 01:07:29,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 73 states have (on average 1.1917808219178083) internal successors, (87), 79 states have internal predecessors, (87), 15 states have call successors, (15), 5 states have call predecessors, (15), 11 states have return successors, (36), 15 states have call predecessors, (36), 14 states have call successors, (36) [2021-11-21 01:07:29,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 138 transitions. [2021-11-21 01:07:29,005 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 138 transitions. Word has length 75 [2021-11-21 01:07:29,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:07:29,005 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 138 transitions. [2021-11-21 01:07:29,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-21 01:07:29,006 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 138 transitions. [2021-11-21 01:07:29,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-21 01:07:29,008 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:07:29,008 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:07:29,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2021-11-21 01:07:29,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:07:29,217 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:07:29,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:07:29,218 INFO L85 PathProgramCache]: Analyzing trace with hash 700030255, now seen corresponding path program 1 times [2021-11-21 01:07:29,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:07:29,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [670109772] [2021-11-21 01:07:29,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:07:29,218 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:07:29,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:07:29,219 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:07:29,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2021-11-21 01:07:29,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:07:29,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-21 01:07:29,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:07:31,096 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-21 01:07:31,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:07:34,844 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-21 01:07:34,845 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:07:34,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [670109772] [2021-11-21 01:07:34,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [670109772] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:07:34,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [380162815] [2021-11-21 01:07:34,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:07:34,846 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:07:34,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:07:34,853 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:07:34,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (49)] Waiting until timeout for monitored process [2021-11-21 01:07:35,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:07:35,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-21 01:07:35,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:07:37,815 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-21 01:07:37,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:07:45,397 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-21 01:07:45,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [380162815] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:07:45,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793950485] [2021-11-21 01:07:45,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:07:45,398 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:07:45,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:07:45,398 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:07:45,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-11-21 01:07:45,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:07:45,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-21 01:07:45,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:07:46,260 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-21 01:07:46,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:07:48,973 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-21 01:07:48,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793950485] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:07:48,974 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:07:48,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 15, 16, 15, 16] total 43 [2021-11-21 01:07:48,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166682559] [2021-11-21 01:07:48,975 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:07:48,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-21 01:07:48,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:07:48,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-21 01:07:48,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=1560, Unknown=0, NotChecked=0, Total=1806 [2021-11-21 01:07:48,978 INFO L87 Difference]: Start difference. First operand 100 states and 138 transitions. Second operand has 43 states, 43 states have (on average 2.13953488372093) internal successors, (92), 43 states have internal predecessors, (92), 11 states have call successors, (14), 2 states have call predecessors, (14), 6 states have return successors, (15), 11 states have call predecessors, (15), 10 states have call successors, (15) [2021-11-21 01:08:03,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:08:03,239 INFO L93 Difference]: Finished difference Result 139 states and 184 transitions. [2021-11-21 01:08:03,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-21 01:08:03,240 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.13953488372093) internal successors, (92), 43 states have internal predecessors, (92), 11 states have call successors, (14), 2 states have call predecessors, (14), 6 states have return successors, (15), 11 states have call predecessors, (15), 10 states have call successors, (15) Word has length 75 [2021-11-21 01:08:03,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:08:03,242 INFO L225 Difference]: With dead ends: 139 [2021-11-21 01:08:03,242 INFO L226 Difference]: Without dead ends: 116 [2021-11-21 01:08:03,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 402 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 795 ImplicationChecksByTransitivity, 20.9s TimeCoverageRelationStatistics Valid=650, Invalid=3010, Unknown=0, NotChecked=0, Total=3660 [2021-11-21 01:08:03,245 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 308 mSDsluCounter, 871 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 948 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:08:03,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [315 Valid, 948 Invalid, 668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2021-11-21 01:08:03,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-11-21 01:08:03,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 99. [2021-11-21 01:08:03,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 73 states have (on average 1.178082191780822) internal successors, (86), 77 states have internal predecessors, (86), 15 states have call successors, (15), 6 states have call predecessors, (15), 10 states have return successors, (31), 15 states have call predecessors, (31), 14 states have call successors, (31) [2021-11-21 01:08:03,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 132 transitions. [2021-11-21 01:08:03,273 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 132 transitions. Word has length 75 [2021-11-21 01:08:03,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:08:03,273 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 132 transitions. [2021-11-21 01:08:03,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.13953488372093) internal successors, (92), 43 states have internal predecessors, (92), 11 states have call successors, (14), 2 states have call predecessors, (14), 6 states have return successors, (15), 11 states have call predecessors, (15), 10 states have call successors, (15) [2021-11-21 01:08:03,274 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 132 transitions. [2021-11-21 01:08:03,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-21 01:08:03,275 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:08:03,276 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:08:03,279 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (49)] Forceful destruction successful, exit code 0 [2021-11-21 01:08:03,524 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-11-21 01:08:03,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2021-11-21 01:08:03,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:08:03,889 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:08:03,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:08:03,890 INFO L85 PathProgramCache]: Analyzing trace with hash 904822259, now seen corresponding path program 2 times [2021-11-21 01:08:03,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:08:03,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1365491039] [2021-11-21 01:08:03,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 01:08:03,890 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:08:03,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:08:03,891 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:08:03,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2021-11-21 01:08:03,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 01:08:03,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:08:03,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-21 01:08:03,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:08:05,541 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-21 01:08:05,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:08:09,122 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-21 01:08:09,122 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:08:09,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1365491039] [2021-11-21 01:08:09,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1365491039] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:08:09,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [788547283] [2021-11-21 01:08:09,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 01:08:09,123 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:08:09,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:08:09,128 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:08:09,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (52)] Waiting until timeout for monitored process [2021-11-21 01:08:09,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 01:08:09,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:08:09,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-21 01:08:09,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:08:12,394 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-21 01:08:12,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:08:19,671 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-21 01:08:19,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [788547283] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:08:19,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928920881] [2021-11-21 01:08:19,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 01:08:19,672 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:08:19,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:08:19,687 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:08:19,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-11-21 01:08:19,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 01:08:19,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:08:19,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-21 01:08:19,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:08:20,570 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-21 01:08:20,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:08:22,847 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-21 01:08:22,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928920881] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:08:22,848 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:08:22,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 15, 16, 15, 16] total 43 [2021-11-21 01:08:22,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953245505] [2021-11-21 01:08:22,849 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:08:22,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-21 01:08:22,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:08:22,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-21 01:08:22,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=1569, Unknown=0, NotChecked=0, Total=1806 [2021-11-21 01:08:22,852 INFO L87 Difference]: Start difference. First operand 99 states and 132 transitions. Second operand has 43 states, 43 states have (on average 2.13953488372093) internal successors, (92), 43 states have internal predecessors, (92), 11 states have call successors, (14), 2 states have call predecessors, (14), 6 states have return successors, (15), 11 states have call predecessors, (15), 10 states have call successors, (15) [2021-11-21 01:08:38,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:08:38,893 INFO L93 Difference]: Finished difference Result 128 states and 164 transitions. [2021-11-21 01:08:38,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-21 01:08:38,895 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.13953488372093) internal successors, (92), 43 states have internal predecessors, (92), 11 states have call successors, (14), 2 states have call predecessors, (14), 6 states have return successors, (15), 11 states have call predecessors, (15), 10 states have call successors, (15) Word has length 75 [2021-11-21 01:08:38,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:08:38,896 INFO L225 Difference]: With dead ends: 128 [2021-11-21 01:08:38,897 INFO L226 Difference]: Without dead ends: 114 [2021-11-21 01:08:38,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 403 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 772 ImplicationChecksByTransitivity, 20.4s TimeCoverageRelationStatistics Valid=633, Invalid=3027, Unknown=0, NotChecked=0, Total=3660 [2021-11-21 01:08:38,899 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 272 mSDsluCounter, 1248 mSDsCounter, 0 mSdLazyCounter, 704 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 1316 SdHoareTripleChecker+Invalid, 798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2021-11-21 01:08:38,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 1316 Invalid, 798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 704 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2021-11-21 01:08:38,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-11-21 01:08:38,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 96. [2021-11-21 01:08:38,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 71 states have (on average 1.1690140845070423) internal successors, (83), 74 states have internal predecessors, (83), 15 states have call successors, (15), 6 states have call predecessors, (15), 9 states have return successors, (28), 15 states have call predecessors, (28), 14 states have call successors, (28) [2021-11-21 01:08:38,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 126 transitions. [2021-11-21 01:08:38,914 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 126 transitions. Word has length 75 [2021-11-21 01:08:38,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:08:38,914 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 126 transitions. [2021-11-21 01:08:38,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.13953488372093) internal successors, (92), 43 states have internal predecessors, (92), 11 states have call successors, (14), 2 states have call predecessors, (14), 6 states have return successors, (15), 11 states have call predecessors, (15), 10 states have call successors, (15) [2021-11-21 01:08:38,915 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 126 transitions. [2021-11-21 01:08:38,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-21 01:08:38,917 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:08:38,917 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:08:38,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-11-21 01:08:39,156 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (51)] Forceful destruction successful, exit code 0 [2021-11-21 01:08:39,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (52)] Forceful destruction successful, exit code 0 [2021-11-21 01:08:39,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt [2021-11-21 01:08:39,545 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:08:39,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:08:39,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1627177794, now seen corresponding path program 1 times [2021-11-21 01:08:39,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:08:39,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1429084850] [2021-11-21 01:08:39,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:08:39,547 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:08:39,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:08:39,548 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:08:39,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2021-11-21 01:08:39,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:08:39,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-21 01:08:39,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:08:42,201 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-21 01:08:42,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:08:47,937 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-21 01:08:47,937 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:08:47,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1429084850] [2021-11-21 01:08:47,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1429084850] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:08:47,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1965496005] [2021-11-21 01:08:47,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:08:47,937 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:08:47,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:08:47,938 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:08:47,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (55)] Waiting until timeout for monitored process [2021-11-21 01:08:48,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:08:48,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-21 01:08:48,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:08:53,823 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-21 01:08:53,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:09:05,821 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-21 01:09:05,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1965496005] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:09:05,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776478399] [2021-11-21 01:09:05,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:09:05,821 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:09:05,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:09:05,822 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:09:05,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-11-21 01:09:06,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:09:06,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-21 01:09:06,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:09:14,523 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-21 01:09:14,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:09:41,855 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-21 01:09:41,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776478399] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:09:41,856 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:09:41,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 18, 18, 21, 23] total 86 [2021-11-21 01:09:41,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62927518] [2021-11-21 01:09:41,857 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:09:41,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2021-11-21 01:09:41,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:09:41,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-11-21 01:09:41,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=818, Invalid=6492, Unknown=0, NotChecked=0, Total=7310 [2021-11-21 01:09:41,863 INFO L87 Difference]: Start difference. First operand 96 states and 126 transitions. Second operand has 86 states, 84 states have (on average 1.6785714285714286) internal successors, (141), 83 states have internal predecessors, (141), 19 states have call successors, (22), 2 states have call predecessors, (22), 10 states have return successors, (25), 20 states have call predecessors, (25), 18 states have call successors, (25) [2021-11-21 01:10:29,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:10:29,187 INFO L93 Difference]: Finished difference Result 143 states and 185 transitions. [2021-11-21 01:10:29,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-21 01:10:29,189 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 84 states have (on average 1.6785714285714286) internal successors, (141), 83 states have internal predecessors, (141), 19 states have call successors, (22), 2 states have call predecessors, (22), 10 states have return successors, (25), 20 states have call predecessors, (25), 18 states have call successors, (25) Word has length 82 [2021-11-21 01:10:29,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:10:29,190 INFO L225 Difference]: With dead ends: 143 [2021-11-21 01:10:29,191 INFO L226 Difference]: Without dead ends: 129 [2021-11-21 01:10:29,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 517 GetRequests, 402 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3837 ImplicationChecksByTransitivity, 76.3s TimeCoverageRelationStatistics Valid=1674, Invalid=11898, Unknown=0, NotChecked=0, Total=13572 [2021-11-21 01:10:29,196 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 361 mSDsluCounter, 2064 mSDsCounter, 0 mSdLazyCounter, 2033 mSolverCounterSat, 237 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 2125 SdHoareTripleChecker+Invalid, 2270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 2033 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:10:29,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [371 Valid, 2125 Invalid, 2270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 2033 Invalid, 0 Unknown, 0 Unchecked, 19.2s Time] [2021-11-21 01:10:29,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-11-21 01:10:29,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 105. [2021-11-21 01:10:29,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 77 states have (on average 1.155844155844156) internal successors, (89), 80 states have internal predecessors, (89), 17 states have call successors, (17), 6 states have call predecessors, (17), 10 states have return successors, (32), 18 states have call predecessors, (32), 16 states have call successors, (32) [2021-11-21 01:10:29,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 138 transitions. [2021-11-21 01:10:29,216 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 138 transitions. Word has length 82 [2021-11-21 01:10:29,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:10:29,216 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 138 transitions. [2021-11-21 01:10:29,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 84 states have (on average 1.6785714285714286) internal successors, (141), 83 states have internal predecessors, (141), 19 states have call successors, (22), 2 states have call predecessors, (22), 10 states have return successors, (25), 20 states have call predecessors, (25), 18 states have call successors, (25) [2021-11-21 01:10:29,217 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 138 transitions. [2021-11-21 01:10:29,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-21 01:10:29,219 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:10:29,219 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:10:29,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (54)] Forceful destruction successful, exit code 0 [2021-11-21 01:10:29,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (55)] Forceful destruction successful, exit code 0 [2021-11-21 01:10:29,661 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-11-21 01:10:29,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:10:29,837 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:10:29,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:10:29,837 INFO L85 PathProgramCache]: Analyzing trace with hash -2114830850, now seen corresponding path program 2 times [2021-11-21 01:10:29,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:10:29,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [87392404] [2021-11-21 01:10:29,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 01:10:29,838 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:10:29,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:10:29,839 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:10:29,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2021-11-21 01:10:29,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 01:10:29,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:10:29,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-21 01:10:29,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:10:32,178 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-21 01:10:32,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:10:37,810 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-21 01:10:37,811 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:10:37,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [87392404] [2021-11-21 01:10:37,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [87392404] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:10:37,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1068767690] [2021-11-21 01:10:37,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 01:10:37,811 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:10:37,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:10:37,812 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:10:37,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (58)] Waiting until timeout for monitored process [2021-11-21 01:10:38,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 01:10:38,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:10:38,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-21 01:10:38,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:10:43,678 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-21 01:10:43,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:10:56,105 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-21 01:10:56,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1068767690] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:10:56,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821847258] [2021-11-21 01:10:56,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 01:10:56,105 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:10:56,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:10:56,106 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:10:56,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-11-21 01:10:56,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 01:10:56,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:10:56,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-21 01:10:56,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:11:04,262 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-21 01:11:04,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:11:33,668 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-21 01:11:33,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821847258] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:11:33,668 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:11:33,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 18, 18, 22, 24] total 85 [2021-11-21 01:11:33,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513016001] [2021-11-21 01:11:33,669 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:11:33,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2021-11-21 01:11:33,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:11:33,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-11-21 01:11:33,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=795, Invalid=6345, Unknown=0, NotChecked=0, Total=7140 [2021-11-21 01:11:33,672 INFO L87 Difference]: Start difference. First operand 105 states and 138 transitions. Second operand has 85 states, 83 states have (on average 1.6506024096385543) internal successors, (137), 82 states have internal predecessors, (137), 19 states have call successors, (22), 2 states have call predecessors, (22), 10 states have return successors, (25), 20 states have call predecessors, (25), 18 states have call successors, (25) [2021-11-21 01:12:41,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:12:41,203 INFO L93 Difference]: Finished difference Result 161 states and 199 transitions. [2021-11-21 01:12:41,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-21 01:12:41,205 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 83 states have (on average 1.6506024096385543) internal successors, (137), 82 states have internal predecessors, (137), 19 states have call successors, (22), 2 states have call predecessors, (22), 10 states have return successors, (25), 20 states have call predecessors, (25), 18 states have call successors, (25) Word has length 82 [2021-11-21 01:12:41,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:12:41,206 INFO L225 Difference]: With dead ends: 161 [2021-11-21 01:12:41,206 INFO L226 Difference]: Without dead ends: 140 [2021-11-21 01:12:41,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 523 GetRequests, 403 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3946 ImplicationChecksByTransitivity, 96.1s TimeCoverageRelationStatistics Valid=1899, Invalid=12863, Unknown=0, NotChecked=0, Total=14762 [2021-11-21 01:12:41,209 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 381 mSDsluCounter, 2022 mSDsCounter, 0 mSdLazyCounter, 2112 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 2083 SdHoareTripleChecker+Invalid, 2361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 2112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.8s IncrementalHoareTripleChecker+Time [2021-11-21 01:12:41,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [391 Valid, 2083 Invalid, 2361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 2112 Invalid, 0 Unknown, 0 Unchecked, 20.8s Time] [2021-11-21 01:12:41,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-11-21 01:12:41,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 114. [2021-11-21 01:12:41,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 85 states have (on average 1.1529411764705881) internal successors, (98), 87 states have internal predecessors, (98), 18 states have call successors, (18), 7 states have call predecessors, (18), 10 states have return successors, (31), 19 states have call predecessors, (31), 17 states have call successors, (31) [2021-11-21 01:12:41,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 147 transitions. [2021-11-21 01:12:41,242 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 147 transitions. Word has length 82 [2021-11-21 01:12:41,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:12:41,243 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 147 transitions. [2021-11-21 01:12:41,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 83 states have (on average 1.6506024096385543) internal successors, (137), 82 states have internal predecessors, (137), 19 states have call successors, (22), 2 states have call predecessors, (22), 10 states have return successors, (25), 20 states have call predecessors, (25), 18 states have call successors, (25) [2021-11-21 01:12:41,243 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 147 transitions. [2021-11-21 01:12:41,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-21 01:12:41,245 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:12:41,246 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:12:41,263 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (57)] Forceful destruction successful, exit code 0 [2021-11-21 01:12:41,489 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-11-21 01:12:41,665 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (58)] Forceful destruction successful, exit code 0 [2021-11-21 01:12:41,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt [2021-11-21 01:12:41,863 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:12:41,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:12:41,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1402295107, now seen corresponding path program 1 times [2021-11-21 01:12:41,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:12:41,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [902669003] [2021-11-21 01:12:41,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:12:41,865 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:12:41,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:12:41,866 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:12:41,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (60)] Waiting until timeout for monitored process [2021-11-21 01:12:41,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:12:41,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-21 01:12:41,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:12:42,806 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-21 01:12:42,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:12:44,329 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-21 01:12:44,329 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:12:44,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [902669003] [2021-11-21 01:12:44,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [902669003] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:12:44,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1412049135] [2021-11-21 01:12:44,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:12:44,330 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:12:44,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:12:44,332 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:12:44,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (61)] Waiting until timeout for monitored process [2021-11-21 01:12:44,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:12:44,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-21 01:12:44,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:12:44,922 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-21 01:12:44,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:12:45,965 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-21 01:12:45,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1412049135] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:12:45,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824218375] [2021-11-21 01:12:45,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:12:45,966 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:12:45,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:12:45,967 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:12:45,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-11-21 01:12:46,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:12:46,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-21 01:12:46,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:12:46,545 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-21 01:12:46,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:12:47,480 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-21 01:12:47,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824218375] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:12:47,481 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:12:47,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 10, 10] total 15 [2021-11-21 01:12:47,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974666069] [2021-11-21 01:12:47,481 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:12:47,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-21 01:12:47,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:12:47,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-21 01:12:47,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-11-21 01:12:47,483 INFO L87 Difference]: Start difference. First operand 114 states and 147 transitions. Second operand has 15 states, 15 states have (on average 4.466666666666667) internal successors, (67), 15 states have internal predecessors, (67), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2021-11-21 01:12:49,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:12:49,679 INFO L93 Difference]: Finished difference Result 123 states and 155 transitions. [2021-11-21 01:12:49,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-21 01:12:49,680 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.466666666666667) internal successors, (67), 15 states have internal predecessors, (67), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) Word has length 83 [2021-11-21 01:12:49,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:12:49,682 INFO L225 Difference]: With dead ends: 123 [2021-11-21 01:12:49,682 INFO L226 Difference]: Without dead ends: 112 [2021-11-21 01:12:49,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 479 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-11-21 01:12:49,683 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 121 mSDsluCounter, 656 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 735 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:12:49,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 735 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-21 01:12:49,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-11-21 01:12:49,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2021-11-21 01:12:49,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 84 states have (on average 1.1547619047619047) internal successors, (97), 86 states have internal predecessors, (97), 17 states have call successors, (17), 7 states have call predecessors, (17), 10 states have return successors, (29), 18 states have call predecessors, (29), 16 states have call successors, (29) [2021-11-21 01:12:49,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 143 transitions. [2021-11-21 01:12:49,704 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 143 transitions. Word has length 83 [2021-11-21 01:12:49,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:12:49,705 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 143 transitions. [2021-11-21 01:12:49,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.466666666666667) internal successors, (67), 15 states have internal predecessors, (67), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2021-11-21 01:12:49,705 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 143 transitions. [2021-11-21 01:12:49,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-21 01:12:49,707 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:12:49,708 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:12:49,725 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (61)] Forceful destruction successful, exit code 0 [2021-11-21 01:12:49,922 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (60)] Ended with exit code 0 [2021-11-21 01:12:50,137 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2021-11-21 01:12:50,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:12:50,311 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:12:50,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:12:50,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1128450436, now seen corresponding path program 1 times [2021-11-21 01:12:50,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:12:50,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [264499950] [2021-11-21 01:12:50,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:12:50,312 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:12:50,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:12:50,314 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:12:50,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (63)] Waiting until timeout for monitored process [2021-11-21 01:12:50,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:12:50,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-21 01:12:50,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:12:53,008 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-21 01:12:53,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:12:58,895 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-21 01:12:58,895 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:12:58,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [264499950] [2021-11-21 01:12:58,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [264499950] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:12:58,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [715209202] [2021-11-21 01:12:58,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:12:58,896 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:12:58,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:12:58,897 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:12:58,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (64)] Waiting until timeout for monitored process [2021-11-21 01:12:59,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:12:59,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-21 01:12:59,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:13:05,129 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-21 01:13:05,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:13:16,747 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-21 01:13:16,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [715209202] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:13:16,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306912463] [2021-11-21 01:13:16,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:13:16,748 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:13:16,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:13:16,750 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:13:16,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ea10c4c-b37b-4f4c-95cd-924f02ab6519/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-11-21 01:13:16,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:13:16,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-21 01:13:16,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:13:26,494 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-21 01:13:26,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:13:46,451 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-21 01:13:46,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306912463] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:13:46,452 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:13:46,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 18, 17, 22, 24] total 82 [2021-11-21 01:13:46,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557237459] [2021-11-21 01:13:46,453 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:13:46,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2021-11-21 01:13:46,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:13:46,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-11-21 01:13:46,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=599, Invalid=6043, Unknown=0, NotChecked=0, Total=6642 [2021-11-21 01:13:46,455 INFO L87 Difference]: Start difference. First operand 112 states and 143 transitions. Second operand has 82 states, 80 states have (on average 1.675) internal successors, (134), 79 states have internal predecessors, (134), 20 states have call successors, (23), 2 states have call predecessors, (23), 10 states have return successors, (26), 21 states have call predecessors, (26), 19 states have call successors, (26)