./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/recursive/Fibonacci03_true-unreach-call_true-no-overflow_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5842f4b8 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_45244664-b83e-4d4d-a812-3dd87cb54279/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_45244664-b83e-4d4d-a812-3dd87cb54279/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_45244664-b83e-4d4d-a812-3dd87cb54279/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_45244664-b83e-4d4d-a812-3dd87cb54279/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive/Fibonacci03_true-unreach-call_true-no-overflow_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_45244664-b83e-4d4d-a812-3dd87cb54279/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_45244664-b83e-4d4d-a812-3dd87cb54279/bin-2019/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6e1fd2ba6533b7d8cc379ec5987b906d551e69a3 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-5842f4b [2018-11-18 12:20:45,440 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-18 12:20:45,443 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-18 12:20:45,450 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-18 12:20:45,450 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-18 12:20:45,450 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-18 12:20:45,451 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-18 12:20:45,452 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-18 12:20:45,453 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-18 12:20:45,454 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-18 12:20:45,455 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-18 12:20:45,455 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-18 12:20:45,455 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-18 12:20:45,456 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-18 12:20:45,457 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-18 12:20:45,457 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-18 12:20:45,458 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-18 12:20:45,459 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-18 12:20:45,461 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-18 12:20:45,462 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-18 12:20:45,462 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-18 12:20:45,463 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-18 12:20:45,465 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-18 12:20:45,465 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-18 12:20:45,465 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-18 12:20:45,466 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-18 12:20:45,466 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-18 12:20:45,467 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-18 12:20:45,467 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-18 12:20:45,468 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-18 12:20:45,468 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-18 12:20:45,469 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-18 12:20:45,469 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-18 12:20:45,469 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-18 12:20:45,470 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-18 12:20:45,470 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-18 12:20:45,470 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_45244664-b83e-4d4d-a812-3dd87cb54279/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-11-18 12:20:45,480 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-18 12:20:45,480 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-18 12:20:45,481 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-18 12:20:45,481 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-11-18 12:20:45,481 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-18 12:20:45,481 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-18 12:20:45,481 INFO L133 SettingsManager]: * Use SBE=true [2018-11-18 12:20:45,481 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-18 12:20:45,482 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-18 12:20:45,482 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-18 12:20:45,482 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-18 12:20:45,482 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-18 12:20:45,482 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-18 12:20:45,482 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-18 12:20:45,482 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-18 12:20:45,483 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-18 12:20:45,483 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-18 12:20:45,483 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-18 12:20:45,483 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-18 12:20:45,483 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-18 12:20:45,483 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-18 12:20:45,483 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-18 12:20:45,484 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-18 12:20:45,484 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 12:20:45,484 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-18 12:20:45,484 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-18 12:20:45,484 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-18 12:20:45,484 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-18 12:20:45,484 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-18 12:20:45,484 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-18 12:20:45,485 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true 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-vcloud-master/worker/working_dir_45244664-b83e-4d4d-a812-3dd87cb54279/bin-2019/uautomizer 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(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer 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 -> 6e1fd2ba6533b7d8cc379ec5987b906d551e69a3 [2018-11-18 12:20:45,507 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-18 12:20:45,515 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-18 12:20:45,517 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-18 12:20:45,517 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-18 12:20:45,518 INFO L276 PluginConnector]: CDTParser initialized [2018-11-18 12:20:45,518 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_45244664-b83e-4d4d-a812-3dd87cb54279/bin-2019/uautomizer/../../sv-benchmarks/c/recursive/Fibonacci03_true-unreach-call_true-no-overflow_true-termination.c [2018-11-18 12:20:45,554 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_45244664-b83e-4d4d-a812-3dd87cb54279/bin-2019/uautomizer/data/65247cc2a/4f1fb5aaf5ef4a65a8edcdfdf72c5b47/FLAGd3afacc4b [2018-11-18 12:20:45,949 INFO L307 CDTParser]: Found 1 translation units. [2018-11-18 12:20:45,949 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_45244664-b83e-4d4d-a812-3dd87cb54279/sv-benchmarks/c/recursive/Fibonacci03_true-unreach-call_true-no-overflow_true-termination.c [2018-11-18 12:20:45,953 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_45244664-b83e-4d4d-a812-3dd87cb54279/bin-2019/uautomizer/data/65247cc2a/4f1fb5aaf5ef4a65a8edcdfdf72c5b47/FLAGd3afacc4b [2018-11-18 12:20:45,963 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_45244664-b83e-4d4d-a812-3dd87cb54279/bin-2019/uautomizer/data/65247cc2a/4f1fb5aaf5ef4a65a8edcdfdf72c5b47 [2018-11-18 12:20:45,965 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-18 12:20:45,966 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-18 12:20:45,967 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-18 12:20:45,967 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-18 12:20:45,969 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-18 12:20:45,969 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 12:20:45" (1/1) ... [2018-11-18 12:20:45,971 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27f427c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:20:45, skipping insertion in model container [2018-11-18 12:20:45,971 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 12:20:45" (1/1) ... [2018-11-18 12:20:45,976 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-18 12:20:45,987 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-18 12:20:46,088 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 12:20:46,090 INFO L191 MainTranslator]: Completed pre-run [2018-11-18 12:20:46,099 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 12:20:46,107 INFO L195 MainTranslator]: Completed translation [2018-11-18 12:20:46,107 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:20:46 WrapperNode [2018-11-18 12:20:46,107 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-18 12:20:46,108 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-18 12:20:46,108 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-18 12:20:46,108 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-18 12:20:46,116 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:20:46" (1/1) ... [2018-11-18 12:20:46,116 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:20:46" (1/1) ... [2018-11-18 12:20:46,119 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:20:46" (1/1) ... [2018-11-18 12:20:46,119 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:20:46" (1/1) ... [2018-11-18 12:20:46,121 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:20:46" (1/1) ... [2018-11-18 12:20:46,123 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:20:46" (1/1) ... [2018-11-18 12:20:46,123 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:20:46" (1/1) ... [2018-11-18 12:20:46,124 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-18 12:20:46,124 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-18 12:20:46,125 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-18 12:20:46,125 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-18 12:20:46,125 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:20:46" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_45244664-b83e-4d4d-a812-3dd87cb54279/bin-2019/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 12:20:46,200 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-18 12:20:46,201 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-18 12:20:46,201 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2018-11-18 12:20:46,201 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-18 12:20:46,201 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-11-18 12:20:46,201 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-11-18 12:20:46,201 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2018-11-18 12:20:46,201 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-18 12:20:46,201 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-18 12:20:46,202 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-18 12:20:46,316 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-18 12:20:46,316 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 12:20:46 BoogieIcfgContainer [2018-11-18 12:20:46,316 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-18 12:20:46,317 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-18 12:20:46,317 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-18 12:20:46,319 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-18 12:20:46,320 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 12:20:45" (1/3) ... [2018-11-18 12:20:46,320 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b3be866 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 12:20:46, skipping insertion in model container [2018-11-18 12:20:46,320 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:20:46" (2/3) ... [2018-11-18 12:20:46,321 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b3be866 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 12:20:46, skipping insertion in model container [2018-11-18 12:20:46,321 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 12:20:46" (3/3) ... [2018-11-18 12:20:46,322 INFO L112 eAbstractionObserver]: Analyzing ICFG Fibonacci03_true-unreach-call_true-no-overflow_true-termination.c [2018-11-18 12:20:46,330 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-18 12:20:46,336 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-18 12:20:46,349 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-18 12:20:46,370 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-18 12:20:46,371 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-18 12:20:46,371 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-18 12:20:46,371 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-18 12:20:46,371 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-18 12:20:46,372 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-18 12:20:46,372 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-18 12:20:46,372 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-18 12:20:46,372 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-18 12:20:46,386 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2018-11-18 12:20:46,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-11-18 12:20:46,392 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:20:46,392 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:20:46,394 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:20:46,399 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:20:46,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1900973920, now seen corresponding path program 1 times [2018-11-18 12:20:46,401 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:20:46,401 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:20:46,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:20:46,442 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:20:46,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:20:46,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:20:46,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:20:46,521 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 12:20:46,522 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-18 12:20:46,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 12:20:46,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 12:20:46,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 12:20:46,534 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2018-11-18 12:20:46,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:20:46,606 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2018-11-18 12:20:46,606 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 12:20:46,607 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-11-18 12:20:46,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:20:46,613 INFO L225 Difference]: With dead ends: 36 [2018-11-18 12:20:46,613 INFO L226 Difference]: Without dead ends: 22 [2018-11-18 12:20:46,616 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-18 12:20:46,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-11-18 12:20:46,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-11-18 12:20:46,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-11-18 12:20:46,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2018-11-18 12:20:46,644 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 14 [2018-11-18 12:20:46,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:20:46,644 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2018-11-18 12:20:46,644 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 12:20:46,644 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2018-11-18 12:20:46,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-11-18 12:20:46,645 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:20:46,645 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:20:46,646 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:20:46,646 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:20:46,646 INFO L82 PathProgramCache]: Analyzing trace with hash -509871596, now seen corresponding path program 1 times [2018-11-18 12:20:46,646 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:20:46,646 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:20:46,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:20:46,647 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:20:46,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:20:46,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:20:46,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:20:46,702 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 12:20:46,703 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-18 12:20:46,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 12:20:46,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 12:20:46,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 12:20:46,705 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 5 states. [2018-11-18 12:20:46,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:20:46,759 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2018-11-18 12:20:46,759 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 12:20:46,759 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2018-11-18 12:20:46,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:20:46,760 INFO L225 Difference]: With dead ends: 28 [2018-11-18 12:20:46,760 INFO L226 Difference]: Without dead ends: 24 [2018-11-18 12:20:46,761 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-18 12:20:46,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-11-18 12:20:46,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2018-11-18 12:20:46,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-11-18 12:20:46,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2018-11-18 12:20:46,766 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 15 [2018-11-18 12:20:46,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:20:46,766 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2018-11-18 12:20:46,766 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 12:20:46,766 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2018-11-18 12:20:46,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-11-18 12:20:46,767 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:20:46,767 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:20:46,768 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:20:46,768 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:20:46,768 INFO L82 PathProgramCache]: Analyzing trace with hash 1203666899, now seen corresponding path program 1 times [2018-11-18 12:20:46,768 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:20:46,768 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:20:46,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:20:46,769 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:20:46,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:20:46,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:20:46,840 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-18 12:20:46,840 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:20:46,840 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_45244664-b83e-4d4d-a812-3dd87cb54279/bin-2019/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 12:20:46,849 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:20:46,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:20:46,871 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:20:46,905 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-18 12:20:46,920 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:20:46,920 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2018-11-18 12:20:46,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-18 12:20:46,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-18 12:20:46,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2018-11-18 12:20:46,921 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 8 states. [2018-11-18 12:20:47,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:20:47,018 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2018-11-18 12:20:47,018 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-18 12:20:47,018 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2018-11-18 12:20:47,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:20:47,019 INFO L225 Difference]: With dead ends: 39 [2018-11-18 12:20:47,019 INFO L226 Difference]: Without dead ends: 24 [2018-11-18 12:20:47,019 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2018-11-18 12:20:47,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-11-18 12:20:47,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-11-18 12:20:47,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-11-18 12:20:47,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2018-11-18 12:20:47,023 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 27 [2018-11-18 12:20:47,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:20:47,023 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2018-11-18 12:20:47,023 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-18 12:20:47,023 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2018-11-18 12:20:47,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-11-18 12:20:47,024 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:20:47,024 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:20:47,025 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:20:47,025 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:20:47,025 INFO L82 PathProgramCache]: Analyzing trace with hash -603082491, now seen corresponding path program 1 times [2018-11-18 12:20:47,025 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:20:47,025 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:20:47,026 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:20:47,026 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:20:47,026 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:20:47,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:20:47,072 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-18 12:20:47,072 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:20:47,073 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_45244664-b83e-4d4d-a812-3dd87cb54279/bin-2019/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 12:20:47,083 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:20:47,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:20:47,092 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:20:47,098 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-18 12:20:47,116 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:20:47,116 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-11-18 12:20:47,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-18 12:20:47,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-18 12:20:47,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-11-18 12:20:47,117 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 6 states. [2018-11-18 12:20:47,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:20:47,172 INFO L93 Difference]: Finished difference Result 33 states and 42 transitions. [2018-11-18 12:20:47,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-18 12:20:47,172 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2018-11-18 12:20:47,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:20:47,173 INFO L225 Difference]: With dead ends: 33 [2018-11-18 12:20:47,173 INFO L226 Difference]: Without dead ends: 29 [2018-11-18 12:20:47,174 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-11-18 12:20:47,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-11-18 12:20:47,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-11-18 12:20:47,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-11-18 12:20:47,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 38 transitions. [2018-11-18 12:20:47,180 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 38 transitions. Word has length 28 [2018-11-18 12:20:47,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:20:47,180 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 38 transitions. [2018-11-18 12:20:47,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-18 12:20:47,180 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 38 transitions. [2018-11-18 12:20:47,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-11-18 12:20:47,181 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:20:47,181 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:20:47,181 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:20:47,181 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:20:47,181 INFO L82 PathProgramCache]: Analyzing trace with hash -2046185202, now seen corresponding path program 2 times [2018-11-18 12:20:47,181 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:20:47,182 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:20:47,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:20:47,182 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:20:47,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:20:47,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:20:47,232 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-11-18 12:20:47,232 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:20:47,232 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_45244664-b83e-4d4d-a812-3dd87cb54279/bin-2019/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 12:20:47,242 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-18 12:20:47,266 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-18 12:20:47,266 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:20:47,269 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:20:47,296 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-11-18 12:20:47,321 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:20:47,321 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2018-11-18 12:20:47,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-18 12:20:47,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-18 12:20:47,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2018-11-18 12:20:47,322 INFO L87 Difference]: Start difference. First operand 29 states and 38 transitions. Second operand 9 states. [2018-11-18 12:20:47,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:20:47,405 INFO L93 Difference]: Finished difference Result 43 states and 63 transitions. [2018-11-18 12:20:47,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-18 12:20:47,405 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 41 [2018-11-18 12:20:47,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:20:47,407 INFO L225 Difference]: With dead ends: 43 [2018-11-18 12:20:47,407 INFO L226 Difference]: Without dead ends: 37 [2018-11-18 12:20:47,407 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2018-11-18 12:20:47,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-11-18 12:20:47,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2018-11-18 12:20:47,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-11-18 12:20:47,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 50 transitions. [2018-11-18 12:20:47,415 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 50 transitions. Word has length 41 [2018-11-18 12:20:47,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:20:47,415 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 50 transitions. [2018-11-18 12:20:47,415 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-18 12:20:47,415 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 50 transitions. [2018-11-18 12:20:47,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-11-18 12:20:47,417 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:20:47,417 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 11, 6, 6, 6, 6, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:20:47,417 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:20:47,417 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:20:47,418 INFO L82 PathProgramCache]: Analyzing trace with hash -168777920, now seen corresponding path program 3 times [2018-11-18 12:20:47,418 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:20:47,418 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:20:47,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:20:47,418 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 12:20:47,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:20:47,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:20:47,588 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 176 proven. 28 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2018-11-18 12:20:47,589 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:20:47,589 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_45244664-b83e-4d4d-a812-3dd87cb54279/bin-2019/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 12:20:47,599 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 12:20:47,619 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-11-18 12:20:47,619 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:20:47,624 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:20:47,661 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 174 proven. 17 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2018-11-18 12:20:47,685 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:20:47,685 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 12 [2018-11-18 12:20:47,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-18 12:20:47,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-18 12:20:47,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2018-11-18 12:20:47,686 INFO L87 Difference]: Start difference. First operand 34 states and 50 transitions. Second operand 12 states. [2018-11-18 12:20:47,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:20:47,862 INFO L93 Difference]: Finished difference Result 77 states and 144 transitions. [2018-11-18 12:20:47,863 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-18 12:20:47,864 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 97 [2018-11-18 12:20:47,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:20:47,865 INFO L225 Difference]: With dead ends: 77 [2018-11-18 12:20:47,865 INFO L226 Difference]: Without dead ends: 50 [2018-11-18 12:20:47,866 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2018-11-18 12:20:47,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-11-18 12:20:47,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2018-11-18 12:20:47,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-11-18 12:20:47,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 64 transitions. [2018-11-18 12:20:47,874 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 64 transitions. Word has length 97 [2018-11-18 12:20:47,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:20:47,875 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 64 transitions. [2018-11-18 12:20:47,875 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-18 12:20:47,875 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 64 transitions. [2018-11-18 12:20:47,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-11-18 12:20:47,877 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:20:47,877 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 13, 7, 7, 7, 7, 7, 7, 7, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:20:47,877 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:20:47,877 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:20:47,878 INFO L82 PathProgramCache]: Analyzing trace with hash -101037109, now seen corresponding path program 4 times [2018-11-18 12:20:47,878 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:20:47,878 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:20:47,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:20:47,878 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 12:20:47,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:20:47,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:20:47,967 INFO L134 CoverageAnalysis]: Checked inductivity of 582 backedges. 123 proven. 112 refuted. 0 times theorem prover too weak. 347 trivial. 0 not checked. [2018-11-18 12:20:47,967 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:20:47,967 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_45244664-b83e-4d4d-a812-3dd87cb54279/bin-2019/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 12:20:47,973 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 12:20:47,992 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 12:20:47,993 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:20:47,997 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:20:48,067 INFO L134 CoverageAnalysis]: Checked inductivity of 582 backedges. 94 proven. 224 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2018-11-18 12:20:48,082 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:20:48,082 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 14 [2018-11-18 12:20:48,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-18 12:20:48,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-18 12:20:48,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2018-11-18 12:20:48,083 INFO L87 Difference]: Start difference. First operand 44 states and 64 transitions. Second operand 14 states. [2018-11-18 12:20:48,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:20:48,430 INFO L93 Difference]: Finished difference Result 108 states and 183 transitions. [2018-11-18 12:20:48,430 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-11-18 12:20:48,430 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 111 [2018-11-18 12:20:48,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:20:48,432 INFO L225 Difference]: With dead ends: 108 [2018-11-18 12:20:48,433 INFO L226 Difference]: Without dead ends: 69 [2018-11-18 12:20:48,434 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2018-11-18 12:20:48,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-11-18 12:20:48,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-11-18 12:20:48,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-11-18 12:20:48,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 90 transitions. [2018-11-18 12:20:48,444 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 90 transitions. Word has length 111 [2018-11-18 12:20:48,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:20:48,444 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 90 transitions. [2018-11-18 12:20:48,444 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-18 12:20:48,444 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 90 transitions. [2018-11-18 12:20:48,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2018-11-18 12:20:48,447 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:20:48,447 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 25, 15, 15, 15, 15, 15, 15, 15, 10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:20:48,447 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:20:48,447 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:20:48,448 INFO L82 PathProgramCache]: Analyzing trace with hash -516480259, now seen corresponding path program 5 times [2018-11-18 12:20:48,448 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:20:48,448 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:20:48,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:20:48,449 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 12:20:48,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:20:48,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:20:48,577 INFO L134 CoverageAnalysis]: Checked inductivity of 2580 backedges. 137 proven. 567 refuted. 0 times theorem prover too weak. 1876 trivial. 0 not checked. [2018-11-18 12:20:48,577 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:20:48,577 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_45244664-b83e-4d4d-a812-3dd87cb54279/bin-2019/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 12:20:48,584 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-18 12:20:48,644 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-11-18 12:20:48,645 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:20:48,651 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:20:48,779 INFO L134 CoverageAnalysis]: Checked inductivity of 2580 backedges. 630 proven. 586 refuted. 0 times theorem prover too weak. 1364 trivial. 0 not checked. [2018-11-18 12:20:48,795 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:20:48,795 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14] total 17 [2018-11-18 12:20:48,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-18 12:20:48,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-18 12:20:48,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2018-11-18 12:20:48,796 INFO L87 Difference]: Start difference. First operand 69 states and 90 transitions. Second operand 17 states. [2018-11-18 12:20:49,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:20:49,175 INFO L93 Difference]: Finished difference Result 153 states and 239 transitions. [2018-11-18 12:20:49,175 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-11-18 12:20:49,175 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 219 [2018-11-18 12:20:49,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:20:49,176 INFO L225 Difference]: With dead ends: 153 [2018-11-18 12:20:49,176 INFO L226 Difference]: Without dead ends: 93 [2018-11-18 12:20:49,177 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=321, Invalid=1085, Unknown=0, NotChecked=0, Total=1406 [2018-11-18 12:20:49,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-11-18 12:20:49,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 82. [2018-11-18 12:20:49,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-11-18 12:20:49,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 108 transitions. [2018-11-18 12:20:49,187 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 108 transitions. Word has length 219 [2018-11-18 12:20:49,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:20:49,188 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 108 transitions. [2018-11-18 12:20:49,188 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-18 12:20:49,188 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 108 transitions. [2018-11-18 12:20:49,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2018-11-18 12:20:49,192 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:20:49,193 INFO L375 BasicCegarLoop]: trace histogram [41, 41, 33, 20, 20, 20, 20, 20, 20, 20, 13, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:20:49,193 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:20:49,193 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:20:49,193 INFO L82 PathProgramCache]: Analyzing trace with hash 39069676, now seen corresponding path program 6 times [2018-11-18 12:20:49,193 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:20:49,193 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:20:49,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:20:49,194 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 12:20:49,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:20:49,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:20:49,343 INFO L134 CoverageAnalysis]: Checked inductivity of 4568 backedges. 702 proven. 270 refuted. 0 times theorem prover too weak. 3596 trivial. 0 not checked. [2018-11-18 12:20:49,343 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:20:49,343 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_45244664-b83e-4d4d-a812-3dd87cb54279/bin-2019/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 12:20:49,349 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-18 12:20:49,388 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2018-11-18 12:20:49,388 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:20:49,392 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:20:49,452 INFO L134 CoverageAnalysis]: Checked inductivity of 4568 backedges. 331 proven. 821 refuted. 0 times theorem prover too weak. 3416 trivial. 0 not checked. [2018-11-18 12:20:49,468 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:20:49,468 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 11 [2018-11-18 12:20:49,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-18 12:20:49,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-18 12:20:49,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2018-11-18 12:20:49,469 INFO L87 Difference]: Start difference. First operand 82 states and 108 transitions. Second operand 11 states. [2018-11-18 12:20:49,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:20:49,600 INFO L93 Difference]: Finished difference Result 91 states and 125 transitions. [2018-11-18 12:20:49,600 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-18 12:20:49,600 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 287 [2018-11-18 12:20:49,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:20:49,601 INFO L225 Difference]: With dead ends: 91 [2018-11-18 12:20:49,601 INFO L226 Difference]: Without dead ends: 87 [2018-11-18 12:20:49,602 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 290 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2018-11-18 12:20:49,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-11-18 12:20:49,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-11-18 12:20:49,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-11-18 12:20:49,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 121 transitions. [2018-11-18 12:20:49,612 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 121 transitions. Word has length 287 [2018-11-18 12:20:49,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:20:49,612 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 121 transitions. [2018-11-18 12:20:49,612 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-18 12:20:49,612 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 121 transitions. [2018-11-18 12:20:49,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 533 [2018-11-18 12:20:49,621 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:20:49,621 INFO L375 BasicCegarLoop]: trace histogram [77, 77, 62, 38, 38, 38, 38, 38, 38, 38, 24, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:20:49,621 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:20:49,621 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:20:49,622 INFO L82 PathProgramCache]: Analyzing trace with hash 826091136, now seen corresponding path program 7 times [2018-11-18 12:20:49,622 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:20:49,622 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:20:49,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:20:49,623 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 12:20:49,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:20:49,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:20:49,904 INFO L134 CoverageAnalysis]: Checked inductivity of 16407 backedges. 425 proven. 2285 refuted. 0 times theorem prover too weak. 13697 trivial. 0 not checked. [2018-11-18 12:20:49,904 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:20:49,904 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_45244664-b83e-4d4d-a812-3dd87cb54279/bin-2019/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 12:20:49,913 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:20:49,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:20:49,999 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:20:50,103 INFO L134 CoverageAnalysis]: Checked inductivity of 16407 backedges. 386 proven. 2689 refuted. 0 times theorem prover too weak. 13332 trivial. 0 not checked. [2018-11-18 12:20:50,119 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:20:50,120 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2018-11-18 12:20:50,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-18 12:20:50,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-18 12:20:50,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2018-11-18 12:20:50,121 INFO L87 Difference]: Start difference. First operand 87 states and 121 transitions. Second operand 12 states. [2018-11-18 12:20:50,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:20:50,289 INFO L93 Difference]: Finished difference Result 96 states and 140 transitions. [2018-11-18 12:20:50,289 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-18 12:20:50,289 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 532 [2018-11-18 12:20:50,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:20:50,291 INFO L225 Difference]: With dead ends: 96 [2018-11-18 12:20:50,291 INFO L226 Difference]: Without dead ends: 92 [2018-11-18 12:20:50,292 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 556 GetRequests, 538 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2018-11-18 12:20:50,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-11-18 12:20:50,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-11-18 12:20:50,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-11-18 12:20:50,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 136 transitions. [2018-11-18 12:20:50,303 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 136 transitions. Word has length 532 [2018-11-18 12:20:50,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:20:50,304 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 136 transitions. [2018-11-18 12:20:50,304 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-18 12:20:50,304 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 136 transitions. [2018-11-18 12:20:50,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1201 [2018-11-18 12:20:50,311 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:20:50,311 INFO L375 BasicCegarLoop]: trace histogram [175, 175, 142, 87, 87, 87, 87, 87, 87, 87, 55, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:20:50,311 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:20:50,311 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:20:50,312 INFO L82 PathProgramCache]: Analyzing trace with hash -497666383, now seen corresponding path program 8 times [2018-11-18 12:20:50,312 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:20:50,312 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:20:50,312 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:20:50,312 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:20:50,312 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:20:50,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:20:50,881 INFO L134 CoverageAnalysis]: Checked inductivity of 85875 backedges. 2520 proven. 6657 refuted. 0 times theorem prover too weak. 76698 trivial. 0 not checked. [2018-11-18 12:20:50,881 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:20:50,882 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_45244664-b83e-4d4d-a812-3dd87cb54279/bin-2019/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 12:20:50,892 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-18 12:20:51,111 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-18 12:20:51,111 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:20:51,129 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:20:51,636 INFO L134 CoverageAnalysis]: Checked inductivity of 85875 backedges. 39097 proven. 2092 refuted. 0 times theorem prover too weak. 44686 trivial. 0 not checked. [2018-11-18 12:20:51,653 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:20:51,653 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 21 [2018-11-18 12:20:51,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-18 12:20:51,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-18 12:20:51,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2018-11-18 12:20:51,655 INFO L87 Difference]: Start difference. First operand 92 states and 136 transitions. Second operand 21 states. [2018-11-18 12:20:52,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:20:52,080 INFO L93 Difference]: Finished difference Result 198 states and 359 transitions. [2018-11-18 12:20:52,080 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-11-18 12:20:52,080 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 1200 [2018-11-18 12:20:52,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:20:52,082 INFO L225 Difference]: With dead ends: 198 [2018-11-18 12:20:52,082 INFO L226 Difference]: Without dead ends: 115 [2018-11-18 12:20:52,083 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1243 GetRequests, 1198 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=451, Invalid=1619, Unknown=0, NotChecked=0, Total=2070 [2018-11-18 12:20:52,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-11-18 12:20:52,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 104. [2018-11-18 12:20:52,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-11-18 12:20:52,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 150 transitions. [2018-11-18 12:20:52,093 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 150 transitions. Word has length 1200 [2018-11-18 12:20:52,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:20:52,094 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 150 transitions. [2018-11-18 12:20:52,094 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-18 12:20:52,094 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 150 transitions. [2018-11-18 12:20:52,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 928 [2018-11-18 12:20:52,097 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:20:52,097 INFO L375 BasicCegarLoop]: trace histogram [135, 135, 109, 67, 67, 67, 67, 67, 67, 67, 42, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:20:52,098 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:20:52,098 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:20:52,098 INFO L82 PathProgramCache]: Analyzing trace with hash 838202223, now seen corresponding path program 9 times [2018-11-18 12:20:52,098 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:20:52,098 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:20:52,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:20:52,098 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 12:20:52,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:20:52,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:20:52,554 INFO L134 CoverageAnalysis]: Checked inductivity of 50910 backedges. 5025 proven. 2236 refuted. 0 times theorem prover too weak. 43649 trivial. 0 not checked. [2018-11-18 12:20:52,554 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:20:52,554 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_45244664-b83e-4d4d-a812-3dd87cb54279/bin-2019/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 12:20:52,560 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 12:20:52,727 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 69 check-sat command(s) [2018-11-18 12:20:52,727 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:20:52,740 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:20:53,064 INFO L134 CoverageAnalysis]: Checked inductivity of 50910 backedges. 21829 proven. 296 refuted. 0 times theorem prover too weak. 28785 trivial. 0 not checked. [2018-11-18 12:20:53,080 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:20:53,080 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 18 [2018-11-18 12:20:53,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-18 12:20:53,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-18 12:20:53,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2018-11-18 12:20:53,081 INFO L87 Difference]: Start difference. First operand 104 states and 150 transitions. Second operand 18 states. [2018-11-18 12:20:53,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:20:53,577 INFO L93 Difference]: Finished difference Result 210 states and 336 transitions. [2018-11-18 12:20:53,577 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-11-18 12:20:53,578 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 927 [2018-11-18 12:20:53,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:20:53,580 INFO L225 Difference]: With dead ends: 210 [2018-11-18 12:20:53,580 INFO L226 Difference]: Without dead ends: 115 [2018-11-18 12:20:53,581 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 962 GetRequests, 931 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=258, Invalid=798, Unknown=0, NotChecked=0, Total=1056 [2018-11-18 12:20:53,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-11-18 12:20:53,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 97. [2018-11-18 12:20:53,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-11-18 12:20:53,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 140 transitions. [2018-11-18 12:20:53,591 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 140 transitions. Word has length 927 [2018-11-18 12:20:53,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:20:53,592 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 140 transitions. [2018-11-18 12:20:53,592 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-18 12:20:53,592 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 140 transitions. [2018-11-18 12:20:53,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 751 [2018-11-18 12:20:53,597 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:20:53,597 INFO L375 BasicCegarLoop]: trace histogram [109, 109, 88, 54, 54, 54, 54, 54, 54, 54, 34, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:20:53,598 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:20:53,598 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:20:53,598 INFO L82 PathProgramCache]: Analyzing trace with hash 1020040988, now seen corresponding path program 10 times [2018-11-18 12:20:53,598 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:20:53,598 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:20:53,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:20:53,599 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 12:20:53,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:20:53,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:20:54,203 INFO L134 CoverageAnalysis]: Checked inductivity of 33096 backedges. 5957 proven. 4942 refuted. 0 times theorem prover too weak. 22197 trivial. 0 not checked. [2018-11-18 12:20:54,204 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:20:54,204 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_45244664-b83e-4d4d-a812-3dd87cb54279/bin-2019/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 12:20:54,210 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 12:20:54,301 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 12:20:54,301 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:20:54,314 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:20:54,752 INFO L134 CoverageAnalysis]: Checked inductivity of 33096 backedges. 5957 proven. 4942 refuted. 0 times theorem prover too weak. 22197 trivial. 0 not checked. [2018-11-18 12:20:54,768 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:20:54,768 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 36 [2018-11-18 12:20:54,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-11-18 12:20:54,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-11-18 12:20:54,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=1013, Unknown=0, NotChecked=0, Total=1260 [2018-11-18 12:20:54,769 INFO L87 Difference]: Start difference. First operand 97 states and 140 transitions. Second operand 36 states. [2018-11-18 12:20:54,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:20:54,943 INFO L93 Difference]: Finished difference Result 108 states and 168 transitions. [2018-11-18 12:20:54,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-11-18 12:20:54,943 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 750 [2018-11-18 12:20:54,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:20:54,944 INFO L225 Difference]: With dead ends: 108 [2018-11-18 12:20:54,944 INFO L226 Difference]: Without dead ends: 0 [2018-11-18 12:20:54,945 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 974 GetRequests, 936 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=344, Invalid=1216, Unknown=0, NotChecked=0, Total=1560 [2018-11-18 12:20:54,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-18 12:20:54,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-18 12:20:54,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-18 12:20:54,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-18 12:20:54,945 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 750 [2018-11-18 12:20:54,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:20:54,946 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-18 12:20:54,946 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-11-18 12:20:54,946 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-18 12:20:54,946 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-18 12:20:54,949 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-18 12:20:54,964 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 12:20:54,973 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 12:20:55,375 WARN L180 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 44 [2018-11-18 12:20:55,376 INFO L425 ceAbstractionStarter]: For program point fibonacciFINAL(lines 14 22) no Hoare annotation was computed. [2018-11-18 12:20:55,377 INFO L428 ceAbstractionStarter]: At program point fibonacciENTRY(lines 14 22) the Hoare annotation is: true [2018-11-18 12:20:55,377 INFO L421 ceAbstractionStarter]: At program point L20(line 20) the Hoare annotation is: (and (<= |fibonacci_#in~n| fibonacci_~n) (< 1 |fibonacci_#in~n|) (<= fibonacci_~n |fibonacci_#in~n|)) [2018-11-18 12:20:55,377 INFO L425 ceAbstractionStarter]: For program point L20-1(line 20) no Hoare annotation was computed. [2018-11-18 12:20:55,377 INFO L421 ceAbstractionStarter]: At program point L20-2(line 20) the Hoare annotation is: (let ((.cse1 (<= 1 |fibonacci_#t~ret0|)) (.cse0 (<= |fibonacci_#in~n| fibonacci_~n)) (.cse3 (<= 7 fibonacci_~n)) (.cse4 (<= 6 fibonacci_~n)) (.cse2 (<= fibonacci_~n |fibonacci_#in~n|))) (or (and (<= |fibonacci_#in~n| 3) .cse0 .cse1 (<= 3 |fibonacci_#in~n|) .cse2) (and (<= 21 |fibonacci_#t~ret0|) .cse0 .cse3 .cse2) (and (<= 13 |fibonacci_#t~ret0|) .cse0 (<= |fibonacci_#in~n| 8) .cse4 .cse2) (and .cse1 (<= |fibonacci_#in~n| 2) (<= 2 fibonacci_~n) .cse2) (and (<= 5 |fibonacci_#in~n|) .cse0 (<= 3 |fibonacci_#t~ret0|) (<= |fibonacci_#in~n| 5) .cse2) (and (<= 4 |fibonacci_#in~n|) .cse0 (<= fibonacci_~n 4) (<= 2 |fibonacci_#t~ret0|)) (and (<= 8 |fibonacci_#t~ret0|) (<= |fibonacci_#in~n| 7) .cse3 .cse2) (and (<= 5 |fibonacci_#t~ret0|) (<= |fibonacci_#in~n| 6) .cse4 .cse2))) [2018-11-18 12:20:55,377 INFO L425 ceAbstractionStarter]: For program point fibonacciEXIT(lines 14 22) no Hoare annotation was computed. [2018-11-18 12:20:55,377 INFO L425 ceAbstractionStarter]: For program point L17(lines 17 21) no Hoare annotation was computed. [2018-11-18 12:20:55,377 INFO L425 ceAbstractionStarter]: For program point L20-3(line 20) no Hoare annotation was computed. [2018-11-18 12:20:55,377 INFO L425 ceAbstractionStarter]: For program point L15(lines 15 21) no Hoare annotation was computed. [2018-11-18 12:20:55,377 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-18 12:20:55,377 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-18 12:20:55,377 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-18 12:20:55,377 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-18 12:20:55,377 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-18 12:20:55,377 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-18 12:20:55,377 INFO L425 ceAbstractionStarter]: For program point L31(lines 31 35) no Hoare annotation was computed. [2018-11-18 12:20:55,377 INFO L428 ceAbstractionStarter]: At program point L30(line 30) the Hoare annotation is: true [2018-11-18 12:20:55,377 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 25 36) the Hoare annotation is: true [2018-11-18 12:20:55,377 INFO L425 ceAbstractionStarter]: For program point L30-1(line 30) no Hoare annotation was computed. [2018-11-18 12:20:55,377 INFO L425 ceAbstractionStarter]: For program point L27(lines 27 29) no Hoare annotation was computed. [2018-11-18 12:20:55,378 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 25 36) no Hoare annotation was computed. [2018-11-18 12:20:55,378 INFO L425 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 34) no Hoare annotation was computed. [2018-11-18 12:20:55,378 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 25 36) no Hoare annotation was computed. [2018-11-18 12:20:55,378 INFO L425 ceAbstractionStarter]: For program point L34(line 34) no Hoare annotation was computed. [2018-11-18 12:20:55,379 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.11 12:20:55 BoogieIcfgContainer [2018-11-18 12:20:55,380 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-18 12:20:55,380 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-18 12:20:55,380 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-18 12:20:55,380 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-18 12:20:55,380 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 12:20:46" (3/4) ... [2018-11-18 12:20:55,383 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-18 12:20:55,388 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure fibonacci [2018-11-18 12:20:55,388 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-18 12:20:55,388 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-18 12:20:55,391 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-11-18 12:20:55,391 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-11-18 12:20:55,391 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-18 12:20:55,416 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_45244664-b83e-4d4d-a812-3dd87cb54279/bin-2019/uautomizer/witness.graphml [2018-11-18 12:20:55,416 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-18 12:20:55,417 INFO L168 Benchmark]: Toolchain (without parser) took 9450.87 ms. Allocated memory was 1.0 GB in the beginning and 2.3 GB in the end (delta: 1.3 GB). Free memory was 959.2 MB in the beginning and 1.2 GB in the end (delta: -278.8 MB). Peak memory consumption was 980.0 MB. Max. memory is 11.5 GB. [2018-11-18 12:20:55,417 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 12:20:55,417 INFO L168 Benchmark]: CACSL2BoogieTranslator took 140.99 ms. Allocated memory is still 1.0 GB. Free memory was 959.2 MB in the beginning and 948.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-18 12:20:55,418 INFO L168 Benchmark]: Boogie Preprocessor took 16.35 ms. Allocated memory is still 1.0 GB. Free memory was 948.5 MB in the beginning and 945.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-18 12:20:55,418 INFO L168 Benchmark]: RCFGBuilder took 191.79 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 128.5 MB). Free memory was 945.8 MB in the beginning and 1.1 GB in the end (delta: -168.4 MB). Peak memory consumption was 19.5 MB. Max. memory is 11.5 GB. [2018-11-18 12:20:55,418 INFO L168 Benchmark]: TraceAbstraction took 9062.83 ms. Allocated memory was 1.2 GB in the beginning and 2.3 GB in the end (delta: 1.1 GB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -123.9 MB). Peak memory consumption was 1.0 GB. Max. memory is 11.5 GB. [2018-11-18 12:20:55,420 INFO L168 Benchmark]: Witness Printer took 36.24 ms. Allocated memory is still 2.3 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 12:20:55,422 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 140.99 ms. Allocated memory is still 1.0 GB. Free memory was 959.2 MB in the beginning and 948.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 16.35 ms. Allocated memory is still 1.0 GB. Free memory was 948.5 MB in the beginning and 945.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 191.79 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 128.5 MB). Free memory was 945.8 MB in the beginning and 1.1 GB in the end (delta: -168.4 MB). Peak memory consumption was 19.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 9062.83 ms. Allocated memory was 1.2 GB in the beginning and 2.3 GB in the end (delta: 1.1 GB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -123.9 MB). Peak memory consumption was 1.0 GB. Max. memory is 11.5 GB. * Witness Printer took 36.24 ms. Allocated memory is still 2.3 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 34]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 24 locations, 1 error locations. SAFE Result, 9.0s OverallTime, 13 OverallIterations, 175 TraceHistogramMax, 2.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.4s HoareAnnotationTime, HoareTripleCheckerStatistics: 331 SDtfs, 572 SDslu, 1479 SDs, 0 SdLazy, 2124 SolverSat, 669 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4686 GetRequests, 4419 SyntacticMatches, 2 SemanticMatches, 265 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1583 ImplicationChecksByTransitivity, 2.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=104occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 13 MinimizatonAttempts, 51 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 212 PreInvPairs, 298 NumberOfFragments, 131 HoareAnnotationTreeSize, 212 FomulaSimplifications, 1498 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 8 FomulaSimplificationsInter, 2427 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 3.3s InterpolantComputationTime, 8467 NumberOfCodeBlocks, 7850 NumberOfCodeBlocksAsserted, 143 NumberOfCheckSat, 8443 ConstructedInterpolants, 0 QuantifiedInterpolants, 8817327 SizeOfPredicates, 66 NumberOfNonLiveVariables, 8013 ConjunctsInSsa, 354 ConjunctsInUnsatCore, 24 InterpolantComputations, 2 PerfectInterpolantSequences, 360220/389034 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...