./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/recursive-simple/id_o20_false-unreach-call_true-termination_true-no-overflow.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_cd190a51-424a-4e2b-b954-c1dc217663e6/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_cd190a51-424a-4e2b-b954-c1dc217663e6/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_cd190a51-424a-4e2b-b954-c1dc217663e6/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_cd190a51-424a-4e2b-b954-c1dc217663e6/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/id_o20_false-unreach-call_true-termination_true-no-overflow.c -s /tmp/vcloud-vcloud-master/worker/working_dir_cd190a51-424a-4e2b-b954-c1dc217663e6/bin-2019/uautomizer/config/svcomp-Reach-32bit-PetriAutomizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_cd190a51-424a-4e2b-b954-c1dc217663e6/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 d1286ba4e4f9d6c67aa5e4ab5d636bfd3afce4b1 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.23-5842f4b [2018-11-18 15:21:25,447 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-18 15:21:25,448 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-18 15:21:25,455 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-18 15:21:25,455 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-18 15:21:25,456 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-18 15:21:25,457 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-18 15:21:25,458 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-18 15:21:25,459 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-18 15:21:25,459 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-18 15:21:25,460 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-18 15:21:25,460 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-18 15:21:25,461 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-18 15:21:25,461 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-18 15:21:25,462 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-18 15:21:25,463 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-18 15:21:25,463 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-18 15:21:25,464 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-18 15:21:25,466 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-18 15:21:25,467 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-18 15:21:25,468 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-18 15:21:25,469 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-18 15:21:25,470 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-18 15:21:25,470 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-18 15:21:25,470 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-18 15:21:25,471 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-18 15:21:25,472 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-18 15:21:25,472 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-18 15:21:25,473 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-18 15:21:25,473 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-18 15:21:25,474 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-18 15:21:25,474 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-18 15:21:25,474 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-18 15:21:25,474 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-18 15:21:25,475 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-18 15:21:25,475 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-18 15:21:25,476 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_cd190a51-424a-4e2b-b954-c1dc217663e6/bin-2019/uautomizer/config/svcomp-Reach-32bit-PetriAutomizer_Default.epf [2018-11-18 15:21:25,485 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-18 15:21:25,485 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-18 15:21:25,485 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-18 15:21:25,486 INFO L133 SettingsManager]: * Process only entry and re-entry procedures=false [2018-11-18 15:21:25,486 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-18 15:21:25,486 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-18 15:21:25,486 INFO L133 SettingsManager]: * Use SBE=true [2018-11-18 15:21:25,486 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-18 15:21:25,487 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-18 15:21:25,487 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-18 15:21:25,487 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-18 15:21:25,487 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-18 15:21:25,487 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-18 15:21:25,487 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-18 15:21:25,487 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-18 15:21:25,488 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-18 15:21:25,488 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-18 15:21:25,488 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-18 15:21:25,488 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-18 15:21:25,488 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-18 15:21:25,488 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-18 15:21:25,488 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-18 15:21:25,488 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-18 15:21:25,489 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 15:21:25,489 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-18 15:21:25,489 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-18 15:21:25,489 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-18 15:21:25,489 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-18 15:21:25,489 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-18 15:21:25,489 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-18 15:21:25,489 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_cd190a51-424a-4e2b-b954-c1dc217663e6/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 -> d1286ba4e4f9d6c67aa5e4ab5d636bfd3afce4b1 [2018-11-18 15:21:25,511 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-18 15:21:25,520 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-18 15:21:25,522 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-18 15:21:25,523 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-18 15:21:25,524 INFO L276 PluginConnector]: CDTParser initialized [2018-11-18 15:21:25,524 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_cd190a51-424a-4e2b-b954-c1dc217663e6/bin-2019/uautomizer/../../sv-benchmarks/c/recursive-simple/id_o20_false-unreach-call_true-termination_true-no-overflow.c [2018-11-18 15:21:25,560 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_cd190a51-424a-4e2b-b954-c1dc217663e6/bin-2019/uautomizer/data/ee28c3f92/1e7dcb5310e44fc7b6aed6df01b938fe/FLAG63e176981 [2018-11-18 15:21:25,971 INFO L307 CDTParser]: Found 1 translation units. [2018-11-18 15:21:25,971 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_cd190a51-424a-4e2b-b954-c1dc217663e6/sv-benchmarks/c/recursive-simple/id_o20_false-unreach-call_true-termination_true-no-overflow.c [2018-11-18 15:21:25,975 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_cd190a51-424a-4e2b-b954-c1dc217663e6/bin-2019/uautomizer/data/ee28c3f92/1e7dcb5310e44fc7b6aed6df01b938fe/FLAG63e176981 [2018-11-18 15:21:25,985 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_cd190a51-424a-4e2b-b954-c1dc217663e6/bin-2019/uautomizer/data/ee28c3f92/1e7dcb5310e44fc7b6aed6df01b938fe [2018-11-18 15:21:25,988 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-18 15:21:25,989 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-18 15:21:25,989 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-18 15:21:25,989 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-18 15:21:25,992 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-18 15:21:25,992 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 03:21:25" (1/1) ... [2018-11-18 15:21:25,994 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3cf76dfb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:21:25, skipping insertion in model container [2018-11-18 15:21:25,994 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 03:21:25" (1/1) ... [2018-11-18 15:21:26,000 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-18 15:21:26,012 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-18 15:21:26,118 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 15:21:26,120 INFO L191 MainTranslator]: Completed pre-run [2018-11-18 15:21:26,129 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 15:21:26,138 INFO L195 MainTranslator]: Completed translation [2018-11-18 15:21:26,139 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:21:26 WrapperNode [2018-11-18 15:21:26,139 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-18 15:21:26,139 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-18 15:21:26,139 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-18 15:21:26,139 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-18 15:21:26,150 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:21:26" (1/1) ... [2018-11-18 15:21:26,150 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:21:26" (1/1) ... [2018-11-18 15:21:26,154 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:21:26" (1/1) ... [2018-11-18 15:21:26,155 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:21:26" (1/1) ... [2018-11-18 15:21:26,157 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:21:26" (1/1) ... [2018-11-18 15:21:26,159 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:21:26" (1/1) ... [2018-11-18 15:21:26,160 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:21:26" (1/1) ... [2018-11-18 15:21:26,161 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-18 15:21:26,161 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-18 15:21:26,161 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-18 15:21:26,161 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-18 15:21:26,162 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:21:26" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cd190a51-424a-4e2b-b954-c1dc217663e6/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 15:21:26,246 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-18 15:21:26,246 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-18 15:21:26,246 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2018-11-18 15:21:26,246 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-18 15:21:26,246 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2018-11-18 15:21:26,246 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-11-18 15:21:26,246 INFO L130 BoogieDeclarations]: Found specification of procedure id [2018-11-18 15:21:26,246 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-18 15:21:26,247 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-18 15:21:26,247 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-18 15:21:26,350 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-18 15:21:26,350 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 03:21:26 BoogieIcfgContainer [2018-11-18 15:21:26,350 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-18 15:21:26,351 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-18 15:21:26,351 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-18 15:21:26,354 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-18 15:21:26,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 03:21:25" (1/3) ... [2018-11-18 15:21:26,354 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78f6254e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 03:21:26, skipping insertion in model container [2018-11-18 15:21:26,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:21:26" (2/3) ... [2018-11-18 15:21:26,355 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78f6254e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 03:21:26, skipping insertion in model container [2018-11-18 15:21:26,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 03:21:26" (3/3) ... [2018-11-18 15:21:26,356 INFO L112 eAbstractionObserver]: Analyzing ICFG id_o20_false-unreach-call_true-termination_true-no-overflow.c [2018-11-18 15:21:26,362 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-18 15:21:26,367 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-18 15:21:26,376 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-18 15:21:26,397 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-18 15:21:26,398 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-18 15:21:26,398 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-18 15:21:26,398 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-18 15:21:26,398 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-18 15:21:26,398 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-18 15:21:26,398 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-18 15:21:26,398 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-18 15:21:26,399 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-18 15:21:26,412 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2018-11-18 15:21:26,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-18 15:21:26,416 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:21:26,416 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:21:26,418 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:21:26,421 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:21:26,421 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2018-11-18 15:21:26,422 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 15:21:26,423 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 15:21:26,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:21:26,455 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:21:26,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:21:26,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:21:26,579 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 15:21:26,581 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 15:21:26,581 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-18 15:21:26,584 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 15:21:26,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 15:21:26,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 15:21:26,594 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2018-11-18 15:21:26,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:21:26,621 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2018-11-18 15:21:26,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 15:21:26,623 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-11-18 15:21:26,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:21:26,630 INFO L225 Difference]: With dead ends: 32 [2018-11-18 15:21:26,630 INFO L226 Difference]: Without dead ends: 18 [2018-11-18 15:21:26,632 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 15:21:26,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-11-18 15:21:26,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-11-18 15:21:26,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-11-18 15:21:26,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2018-11-18 15:21:26,660 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2018-11-18 15:21:26,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:21:26,660 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2018-11-18 15:21:26,661 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 15:21:26,661 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2018-11-18 15:21:26,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-11-18 15:21:26,662 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:21:26,662 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:21:26,662 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:21:26,662 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:21:26,662 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2018-11-18 15:21:26,662 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 15:21:26,663 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 15:21:26,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:21:26,663 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:21:26,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:21:26,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:21:26,787 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-18 15:21:26,788 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:21:26,788 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cd190a51-424a-4e2b-b954-c1dc217663e6/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 15:21:26,806 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:21:26,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:21:26,821 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:21:26,860 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-18 15:21:26,880 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 15:21:26,880 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-11-18 15:21:26,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-18 15:21:26,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-18 15:21:26,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2018-11-18 15:21:26,882 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 8 states. [2018-11-18 15:21:26,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:21:26,912 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-11-18 15:21:26,912 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-18 15:21:26,912 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2018-11-18 15:21:26,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:21:26,913 INFO L225 Difference]: With dead ends: 25 [2018-11-18 15:21:26,913 INFO L226 Difference]: Without dead ends: 21 [2018-11-18 15:21:26,914 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2018-11-18 15:21:26,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-11-18 15:21:26,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-11-18 15:21:26,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-11-18 15:21:26,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-11-18 15:21:26,917 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2018-11-18 15:21:26,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:21:26,918 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-11-18 15:21:26,918 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-18 15:21:26,918 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-11-18 15:21:26,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-11-18 15:21:26,919 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:21:26,919 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:21:26,919 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:21:26,919 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:21:26,919 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2018-11-18 15:21:26,919 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 15:21:26,919 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 15:21:26,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:21:26,920 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:21:26,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:21:26,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:21:27,037 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-18 15:21:27,037 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:21:27,037 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cd190a51-424a-4e2b-b954-c1dc217663e6/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 15:21:27,050 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-18 15:21:27,065 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-18 15:21:27,065 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 15:21:27,067 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:21:27,098 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-18 15:21:27,120 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 15:21:27,120 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2018-11-18 15:21:27,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-18 15:21:27,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-18 15:21:27,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2018-11-18 15:21:27,121 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 10 states. [2018-11-18 15:21:27,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:21:27,144 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2018-11-18 15:21:27,144 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-18 15:21:27,144 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 25 [2018-11-18 15:21:27,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:21:27,145 INFO L225 Difference]: With dead ends: 28 [2018-11-18 15:21:27,145 INFO L226 Difference]: Without dead ends: 24 [2018-11-18 15:21:27,146 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2018-11-18 15:21:27,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-11-18 15:21:27,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-11-18 15:21:27,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-11-18 15:21:27,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2018-11-18 15:21:27,150 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2018-11-18 15:21:27,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:21:27,151 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2018-11-18 15:21:27,151 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-18 15:21:27,151 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2018-11-18 15:21:27,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-11-18 15:21:27,152 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:21:27,152 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:21:27,152 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:21:27,152 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:21:27,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2018-11-18 15:21:27,153 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 15:21:27,153 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 15:21:27,153 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:21:27,154 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 15:21:27,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:21:27,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:21:27,288 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-18 15:21:27,288 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:21:27,288 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cd190a51-424a-4e2b-b954-c1dc217663e6/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 15:21:27,301 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 15:21:27,333 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-11-18 15:21:27,333 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 15:21:27,334 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:21:27,374 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-18 15:21:27,389 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 15:21:27,389 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2018-11-18 15:21:27,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-18 15:21:27,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-18 15:21:27,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2018-11-18 15:21:27,390 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 12 states. [2018-11-18 15:21:27,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:21:27,419 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2018-11-18 15:21:27,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-18 15:21:27,419 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 31 [2018-11-18 15:21:27,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:21:27,420 INFO L225 Difference]: With dead ends: 31 [2018-11-18 15:21:27,420 INFO L226 Difference]: Without dead ends: 27 [2018-11-18 15:21:27,420 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2018-11-18 15:21:27,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-11-18 15:21:27,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-11-18 15:21:27,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-11-18 15:21:27,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-11-18 15:21:27,424 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2018-11-18 15:21:27,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:21:27,425 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-11-18 15:21:27,425 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-18 15:21:27,425 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-11-18 15:21:27,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-11-18 15:21:27,426 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:21:27,426 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:21:27,426 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:21:27,427 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:21:27,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1080764669, now seen corresponding path program 4 times [2018-11-18 15:21:27,427 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 15:21:27,427 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 15:21:27,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:21:27,428 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 15:21:27,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:21:27,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:21:27,576 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-11-18 15:21:27,576 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:21:27,576 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cd190a51-424a-4e2b-b954-c1dc217663e6/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 15:21:27,583 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 15:21:27,591 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 15:21:27,592 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 15:21:27,593 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:21:27,628 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-11-18 15:21:27,652 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 15:21:27,652 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2018-11-18 15:21:27,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-18 15:21:27,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-18 15:21:27,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2018-11-18 15:21:27,653 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 14 states. [2018-11-18 15:21:27,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:21:27,696 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2018-11-18 15:21:27,697 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-18 15:21:27,697 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 37 [2018-11-18 15:21:27,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:21:27,698 INFO L225 Difference]: With dead ends: 34 [2018-11-18 15:21:27,698 INFO L226 Difference]: Without dead ends: 30 [2018-11-18 15:21:27,698 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2018-11-18 15:21:27,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-11-18 15:21:27,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-11-18 15:21:27,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-11-18 15:21:27,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2018-11-18 15:21:27,702 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2018-11-18 15:21:27,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:21:27,702 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2018-11-18 15:21:27,702 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-18 15:21:27,703 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2018-11-18 15:21:27,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-11-18 15:21:27,703 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:21:27,704 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:21:27,704 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:21:27,704 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:21:27,704 INFO L82 PathProgramCache]: Analyzing trace with hash -1752970513, now seen corresponding path program 5 times [2018-11-18 15:21:27,704 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 15:21:27,704 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 15:21:27,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:21:27,705 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 15:21:27,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:21:27,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:21:27,862 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-11-18 15:21:27,863 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:21:27,863 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cd190a51-424a-4e2b-b954-c1dc217663e6/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 15:21:27,868 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-18 15:21:27,887 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-11-18 15:21:27,887 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 15:21:27,889 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:21:27,916 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-11-18 15:21:27,930 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 15:21:27,931 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2018-11-18 15:21:27,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-18 15:21:27,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-18 15:21:27,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2018-11-18 15:21:27,932 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 16 states. [2018-11-18 15:21:27,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:21:27,986 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2018-11-18 15:21:27,987 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-18 15:21:27,987 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 43 [2018-11-18 15:21:27,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:21:27,987 INFO L225 Difference]: With dead ends: 37 [2018-11-18 15:21:27,987 INFO L226 Difference]: Without dead ends: 33 [2018-11-18 15:21:27,988 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2018-11-18 15:21:27,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-11-18 15:21:27,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-11-18 15:21:27,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-11-18 15:21:27,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-11-18 15:21:27,998 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2018-11-18 15:21:27,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:21:27,998 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-11-18 15:21:27,998 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-18 15:21:27,998 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-11-18 15:21:27,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-11-18 15:21:27,999 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:21:27,999 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:21:27,999 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:21:27,999 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:21:28,000 INFO L82 PathProgramCache]: Analyzing trace with hash -1590630787, now seen corresponding path program 6 times [2018-11-18 15:21:28,000 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 15:21:28,000 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 15:21:28,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:21:28,001 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 15:21:28,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:21:28,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:21:28,207 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-11-18 15:21:28,208 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:21:28,208 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cd190a51-424a-4e2b-b954-c1dc217663e6/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 15:21:28,224 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-18 15:21:28,248 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-11-18 15:21:28,249 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 15:21:28,251 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:21:28,303 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-11-18 15:21:28,318 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 15:21:28,318 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2018-11-18 15:21:28,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-18 15:21:28,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-18 15:21:28,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2018-11-18 15:21:28,319 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 18 states. [2018-11-18 15:21:28,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:21:28,386 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2018-11-18 15:21:28,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-18 15:21:28,386 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 49 [2018-11-18 15:21:28,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:21:28,387 INFO L225 Difference]: With dead ends: 40 [2018-11-18 15:21:28,387 INFO L226 Difference]: Without dead ends: 36 [2018-11-18 15:21:28,387 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2018-11-18 15:21:28,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-11-18 15:21:28,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-11-18 15:21:28,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-11-18 15:21:28,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2018-11-18 15:21:28,391 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2018-11-18 15:21:28,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:21:28,391 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2018-11-18 15:21:28,391 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-18 15:21:28,391 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2018-11-18 15:21:28,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-11-18 15:21:28,391 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:21:28,391 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:21:28,392 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:21:28,392 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:21:28,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1532150511, now seen corresponding path program 7 times [2018-11-18 15:21:28,392 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 15:21:28,392 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 15:21:28,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:21:28,392 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 15:21:28,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:21:28,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:21:28,609 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-11-18 15:21:28,610 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:21:28,610 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cd190a51-424a-4e2b-b954-c1dc217663e6/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 15:21:28,615 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:21:28,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:21:28,625 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:21:28,650 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-11-18 15:21:28,664 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 15:21:28,665 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2018-11-18 15:21:28,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-18 15:21:28,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-18 15:21:28,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=342, Unknown=0, NotChecked=0, Total=380 [2018-11-18 15:21:28,665 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 20 states. [2018-11-18 15:21:28,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:21:28,731 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2018-11-18 15:21:28,731 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-18 15:21:28,731 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 55 [2018-11-18 15:21:28,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:21:28,732 INFO L225 Difference]: With dead ends: 43 [2018-11-18 15:21:28,732 INFO L226 Difference]: Without dead ends: 39 [2018-11-18 15:21:28,732 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=342, Unknown=0, NotChecked=0, Total=380 [2018-11-18 15:21:28,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-11-18 15:21:28,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-11-18 15:21:28,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-11-18 15:21:28,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2018-11-18 15:21:28,737 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2018-11-18 15:21:28,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:21:28,737 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2018-11-18 15:21:28,737 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-18 15:21:28,738 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2018-11-18 15:21:28,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-11-18 15:21:28,738 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:21:28,739 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:21:28,739 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:21:28,739 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:21:28,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1140618237, now seen corresponding path program 8 times [2018-11-18 15:21:28,739 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 15:21:28,739 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 15:21:28,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:21:28,740 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:21:28,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:21:28,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:21:28,964 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-11-18 15:21:28,964 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:21:28,964 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cd190a51-424a-4e2b-b954-c1dc217663e6/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 15:21:28,969 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-18 15:21:28,980 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-18 15:21:28,981 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 15:21:28,983 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:21:29,031 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-11-18 15:21:29,046 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 15:21:29,046 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2018-11-18 15:21:29,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-11-18 15:21:29,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-11-18 15:21:29,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=420, Unknown=0, NotChecked=0, Total=462 [2018-11-18 15:21:29,047 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 22 states. [2018-11-18 15:21:29,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:21:29,141 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2018-11-18 15:21:29,142 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-11-18 15:21:29,142 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 61 [2018-11-18 15:21:29,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:21:29,143 INFO L225 Difference]: With dead ends: 46 [2018-11-18 15:21:29,143 INFO L226 Difference]: Without dead ends: 42 [2018-11-18 15:21:29,143 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=420, Unknown=0, NotChecked=0, Total=462 [2018-11-18 15:21:29,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-11-18 15:21:29,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-11-18 15:21:29,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-11-18 15:21:29,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2018-11-18 15:21:29,146 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2018-11-18 15:21:29,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:21:29,147 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2018-11-18 15:21:29,147 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-11-18 15:21:29,147 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2018-11-18 15:21:29,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-11-18 15:21:29,147 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:21:29,147 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:21:29,148 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:21:29,148 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:21:29,148 INFO L82 PathProgramCache]: Analyzing trace with hash -1749177617, now seen corresponding path program 9 times [2018-11-18 15:21:29,148 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 15:21:29,148 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 15:21:29,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:21:29,152 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 15:21:29,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:21:29,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:21:29,397 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-11-18 15:21:29,398 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:21:29,398 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cd190a51-424a-4e2b-b954-c1dc217663e6/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 15:21:29,407 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 15:21:29,466 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-11-18 15:21:29,466 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 15:21:29,468 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:21:29,519 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-11-18 15:21:29,535 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 15:21:29,535 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2018-11-18 15:21:29,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-11-18 15:21:29,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-11-18 15:21:29,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=506, Unknown=0, NotChecked=0, Total=552 [2018-11-18 15:21:29,536 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 24 states. [2018-11-18 15:21:29,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:21:29,658 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2018-11-18 15:21:29,658 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-11-18 15:21:29,659 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 67 [2018-11-18 15:21:29,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:21:29,659 INFO L225 Difference]: With dead ends: 49 [2018-11-18 15:21:29,660 INFO L226 Difference]: Without dead ends: 45 [2018-11-18 15:21:29,660 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=506, Unknown=0, NotChecked=0, Total=552 [2018-11-18 15:21:29,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-11-18 15:21:29,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-11-18 15:21:29,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-11-18 15:21:29,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2018-11-18 15:21:29,664 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2018-11-18 15:21:29,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:21:29,665 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2018-11-18 15:21:29,665 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-11-18 15:21:29,665 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2018-11-18 15:21:29,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-11-18 15:21:29,666 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:21:29,666 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:21:29,666 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:21:29,666 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:21:29,666 INFO L82 PathProgramCache]: Analyzing trace with hash -1580609155, now seen corresponding path program 10 times [2018-11-18 15:21:29,666 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 15:21:29,667 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 15:21:29,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:21:29,667 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 15:21:29,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:21:29,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:21:29,925 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2018-11-18 15:21:29,925 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:21:29,925 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cd190a51-424a-4e2b-b954-c1dc217663e6/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 15:21:29,933 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 15:21:29,950 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 15:21:29,950 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 15:21:29,952 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:21:29,978 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2018-11-18 15:21:29,993 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 15:21:29,994 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2018-11-18 15:21:29,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-11-18 15:21:29,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-11-18 15:21:29,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=600, Unknown=0, NotChecked=0, Total=650 [2018-11-18 15:21:29,995 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 26 states. [2018-11-18 15:21:30,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:21:30,152 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2018-11-18 15:21:30,152 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-11-18 15:21:30,152 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 73 [2018-11-18 15:21:30,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:21:30,153 INFO L225 Difference]: With dead ends: 52 [2018-11-18 15:21:30,153 INFO L226 Difference]: Without dead ends: 48 [2018-11-18 15:21:30,153 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=600, Unknown=0, NotChecked=0, Total=650 [2018-11-18 15:21:30,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-11-18 15:21:30,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-11-18 15:21:30,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-11-18 15:21:30,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2018-11-18 15:21:30,157 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2018-11-18 15:21:30,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:21:30,157 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2018-11-18 15:21:30,157 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-11-18 15:21:30,157 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2018-11-18 15:21:30,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-11-18 15:21:30,158 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:21:30,158 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:21:30,158 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:21:30,159 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:21:30,159 INFO L82 PathProgramCache]: Analyzing trace with hash -223837457, now seen corresponding path program 11 times [2018-11-18 15:21:30,159 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 15:21:30,159 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 15:21:30,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:21:30,159 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 15:21:30,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:21:30,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:21:30,500 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2018-11-18 15:21:30,500 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:21:30,500 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cd190a51-424a-4e2b-b954-c1dc217663e6/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 15:21:30,513 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-18 15:22:12,992 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-11-18 15:22:12,992 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 15:22:13,083 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:22:13,109 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2018-11-18 15:22:13,125 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 15:22:13,125 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2018-11-18 15:22:13,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-11-18 15:22:13,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-11-18 15:22:13,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=702, Unknown=0, NotChecked=0, Total=756 [2018-11-18 15:22:13,126 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 28 states. [2018-11-18 15:22:13,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:22:13,273 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2018-11-18 15:22:13,273 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-11-18 15:22:13,274 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 79 [2018-11-18 15:22:13,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:22:13,274 INFO L225 Difference]: With dead ends: 55 [2018-11-18 15:22:13,275 INFO L226 Difference]: Without dead ends: 51 [2018-11-18 15:22:13,275 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=702, Unknown=0, NotChecked=0, Total=756 [2018-11-18 15:22:13,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-11-18 15:22:13,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-11-18 15:22:13,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-11-18 15:22:13,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2018-11-18 15:22:13,278 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2018-11-18 15:22:13,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:22:13,279 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2018-11-18 15:22:13,279 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-11-18 15:22:13,279 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2018-11-18 15:22:13,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-11-18 15:22:13,280 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:22:13,280 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:22:13,280 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:22:13,280 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:22:13,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1653931773, now seen corresponding path program 12 times [2018-11-18 15:22:13,280 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 15:22:13,280 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 15:22:13,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:22:13,281 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 15:22:13,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:22:13,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:22:13,672 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-11-18 15:22:13,672 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:22:13,672 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cd190a51-424a-4e2b-b954-c1dc217663e6/bin-2019/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 15:22:13,679 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-18 15:22:13,756 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-11-18 15:22:13,756 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 15:22:13,759 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:22:13,793 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-11-18 15:22:13,808 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 15:22:13,808 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2018-11-18 15:22:13,809 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-11-18 15:22:13,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-11-18 15:22:13,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=812, Unknown=0, NotChecked=0, Total=870 [2018-11-18 15:22:13,809 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 30 states. [2018-11-18 15:22:14,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:22:14,017 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2018-11-18 15:22:14,018 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-11-18 15:22:14,018 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 85 [2018-11-18 15:22:14,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:22:14,019 INFO L225 Difference]: With dead ends: 58 [2018-11-18 15:22:14,019 INFO L226 Difference]: Without dead ends: 54 [2018-11-18 15:22:14,019 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=812, Unknown=0, NotChecked=0, Total=870 [2018-11-18 15:22:14,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-11-18 15:22:14,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-11-18 15:22:14,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-11-18 15:22:14,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2018-11-18 15:22:14,025 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2018-11-18 15:22:14,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:22:14,026 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2018-11-18 15:22:14,026 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-11-18 15:22:14,026 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2018-11-18 15:22:14,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-11-18 15:22:14,027 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:22:14,027 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:22:14,027 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:22:14,027 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:22:14,027 INFO L82 PathProgramCache]: Analyzing trace with hash -218674449, now seen corresponding path program 13 times [2018-11-18 15:22:14,028 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 15:22:14,028 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 15:22:14,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:22:14,028 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 15:22:14,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:22:14,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:22:14,416 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2018-11-18 15:22:14,417 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:22:14,417 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cd190a51-424a-4e2b-b954-c1dc217663e6/bin-2019/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 15:22:14,424 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:22:14,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:22:14,446 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:22:14,493 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2018-11-18 15:22:14,509 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 15:22:14,509 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2018-11-18 15:22:14,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-11-18 15:22:14,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-11-18 15:22:14,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=930, Unknown=0, NotChecked=0, Total=992 [2018-11-18 15:22:14,510 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 32 states. [2018-11-18 15:22:14,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:22:14,754 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2018-11-18 15:22:14,754 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-11-18 15:22:14,754 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 91 [2018-11-18 15:22:14,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:22:14,755 INFO L225 Difference]: With dead ends: 61 [2018-11-18 15:22:14,755 INFO L226 Difference]: Without dead ends: 57 [2018-11-18 15:22:14,756 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=930, Unknown=0, NotChecked=0, Total=992 [2018-11-18 15:22:14,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-11-18 15:22:14,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-11-18 15:22:14,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-11-18 15:22:14,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2018-11-18 15:22:14,761 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2018-11-18 15:22:14,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:22:14,762 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2018-11-18 15:22:14,762 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-11-18 15:22:14,762 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2018-11-18 15:22:14,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-11-18 15:22:14,763 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:22:14,763 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:22:14,763 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:22:14,763 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:22:14,763 INFO L82 PathProgramCache]: Analyzing trace with hash 492436605, now seen corresponding path program 14 times [2018-11-18 15:22:14,763 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 15:22:14,764 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 15:22:14,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:22:14,764 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:22:14,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:22:14,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:22:15,172 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2018-11-18 15:22:15,172 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:22:15,172 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cd190a51-424a-4e2b-b954-c1dc217663e6/bin-2019/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 15:22:15,183 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-18 15:22:15,197 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-18 15:22:15,197 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 15:22:15,199 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:22:15,239 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2018-11-18 15:22:15,254 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 15:22:15,254 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2018-11-18 15:22:15,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-11-18 15:22:15,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-11-18 15:22:15,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=1056, Unknown=0, NotChecked=0, Total=1122 [2018-11-18 15:22:15,255 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 34 states. [2018-11-18 15:22:15,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:22:15,444 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2018-11-18 15:22:15,444 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-11-18 15:22:15,445 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 97 [2018-11-18 15:22:15,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:22:15,445 INFO L225 Difference]: With dead ends: 64 [2018-11-18 15:22:15,445 INFO L226 Difference]: Without dead ends: 60 [2018-11-18 15:22:15,446 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=1056, Unknown=0, NotChecked=0, Total=1122 [2018-11-18 15:22:15,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-11-18 15:22:15,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-11-18 15:22:15,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-11-18 15:22:15,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2018-11-18 15:22:15,450 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2018-11-18 15:22:15,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:22:15,450 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2018-11-18 15:22:15,450 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-11-18 15:22:15,451 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2018-11-18 15:22:15,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-11-18 15:22:15,451 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:22:15,451 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:22:15,452 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:22:15,452 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:22:15,452 INFO L82 PathProgramCache]: Analyzing trace with hash 1083048687, now seen corresponding path program 15 times [2018-11-18 15:22:15,452 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 15:22:15,452 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 15:22:15,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:22:15,455 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 15:22:15,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:22:15,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:22:15,860 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2018-11-18 15:22:15,860 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:22:15,861 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cd190a51-424a-4e2b-b954-c1dc217663e6/bin-2019/uautomizer/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 15:22:15,867 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 15:23:20,119 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-11-18 15:23:20,119 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 15:23:22,433 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:23:22,479 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2018-11-18 15:23:22,483 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 15:23:22,483 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2018-11-18 15:23:22,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-11-18 15:23:22,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-11-18 15:23:22,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=1190, Unknown=0, NotChecked=0, Total=1260 [2018-11-18 15:23:22,484 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 36 states. [2018-11-18 15:23:22,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:23:22,709 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2018-11-18 15:23:22,710 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-11-18 15:23:22,710 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 103 [2018-11-18 15:23:22,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:23:22,710 INFO L225 Difference]: With dead ends: 67 [2018-11-18 15:23:22,710 INFO L226 Difference]: Without dead ends: 63 [2018-11-18 15:23:22,711 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=70, Invalid=1190, Unknown=0, NotChecked=0, Total=1260 [2018-11-18 15:23:22,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-11-18 15:23:22,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-11-18 15:23:22,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-11-18 15:23:22,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2018-11-18 15:23:22,715 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 103 [2018-11-18 15:23:22,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:23:22,715 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2018-11-18 15:23:22,715 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-11-18 15:23:22,716 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2018-11-18 15:23:22,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-11-18 15:23:22,716 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:23:22,717 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:23:22,717 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:23:22,717 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:23:22,717 INFO L82 PathProgramCache]: Analyzing trace with hash 404015613, now seen corresponding path program 16 times [2018-11-18 15:23:22,717 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 15:23:22,717 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 15:23:22,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:23:22,718 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 15:23:22,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:23:22,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:23:23,253 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2018-11-18 15:23:23,253 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:23:23,253 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cd190a51-424a-4e2b-b954-c1dc217663e6/bin-2019/uautomizer/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 15:23:23,259 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 15:23:23,275 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 15:23:23,275 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 15:23:23,277 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:23:23,341 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2018-11-18 15:23:23,356 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 15:23:23,356 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2018-11-18 15:23:23,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-11-18 15:23:23,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-11-18 15:23:23,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=1332, Unknown=0, NotChecked=0, Total=1406 [2018-11-18 15:23:23,357 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 38 states. [2018-11-18 15:23:23,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:23:23,596 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2018-11-18 15:23:23,596 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-11-18 15:23:23,596 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 109 [2018-11-18 15:23:23,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:23:23,597 INFO L225 Difference]: With dead ends: 70 [2018-11-18 15:23:23,597 INFO L226 Difference]: Without dead ends: 66 [2018-11-18 15:23:23,597 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=74, Invalid=1332, Unknown=0, NotChecked=0, Total=1406 [2018-11-18 15:23:23,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-11-18 15:23:23,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-11-18 15:23:23,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-11-18 15:23:23,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2018-11-18 15:23:23,600 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 109 [2018-11-18 15:23:23,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:23:23,600 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2018-11-18 15:23:23,600 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-11-18 15:23:23,600 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2018-11-18 15:23:23,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-11-18 15:23:23,601 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:23:23,601 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:23:23,601 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:23:23,602 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:23:23,602 INFO L82 PathProgramCache]: Analyzing trace with hash -464475409, now seen corresponding path program 17 times [2018-11-18 15:23:23,602 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 15:23:23,602 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 15:23:23,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:23:23,602 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 15:23:23,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:23:23,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:23:24,110 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2018-11-18 15:23:24,111 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:23:24,111 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cd190a51-424a-4e2b-b954-c1dc217663e6/bin-2019/uautomizer/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 15:23:24,116 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-18 15:25:40,060 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-11-18 15:25:40,060 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 15:25:41,730 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:25:41,793 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2018-11-18 15:25:41,809 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 15:25:41,810 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2018-11-18 15:25:41,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-11-18 15:25:41,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-11-18 15:25:41,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=1482, Unknown=0, NotChecked=0, Total=1560 [2018-11-18 15:25:41,811 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 40 states. [2018-11-18 15:25:42,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:25:42,146 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2018-11-18 15:25:42,146 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-11-18 15:25:42,146 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 115 [2018-11-18 15:25:42,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:25:42,147 INFO L225 Difference]: With dead ends: 73 [2018-11-18 15:25:42,147 INFO L226 Difference]: Without dead ends: 69 [2018-11-18 15:25:42,147 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=78, Invalid=1482, Unknown=0, NotChecked=0, Total=1560 [2018-11-18 15:25:42,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-11-18 15:25:42,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-11-18 15:25:42,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-11-18 15:25:42,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2018-11-18 15:25:42,151 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 115 [2018-11-18 15:25:42,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:25:42,151 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2018-11-18 15:25:42,151 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-11-18 15:25:42,151 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2018-11-18 15:25:42,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-11-18 15:25:42,152 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:25:42,152 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:25:42,153 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:25:42,153 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:25:42,153 INFO L82 PathProgramCache]: Analyzing trace with hash 130115453, now seen corresponding path program 18 times [2018-11-18 15:25:42,153 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 15:25:42,153 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 15:25:42,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:25:42,154 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 15:25:42,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:25:42,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:25:42,785 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2018-11-18 15:25:42,785 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:25:42,785 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cd190a51-424a-4e2b-b954-c1dc217663e6/bin-2019/uautomizer/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 15:25:42,790 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-18 15:26:33,411 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-11-18 15:26:33,411 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 15:26:33,634 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:26:33,698 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2018-11-18 15:26:33,714 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 15:26:33,714 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2018-11-18 15:26:33,715 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-11-18 15:26:33,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-11-18 15:26:33,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1640, Unknown=0, NotChecked=0, Total=1722 [2018-11-18 15:26:33,715 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 42 states. [2018-11-18 15:26:34,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:26:34,045 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2018-11-18 15:26:34,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-11-18 15:26:34,045 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 121 [2018-11-18 15:26:34,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:26:34,046 INFO L225 Difference]: With dead ends: 76 [2018-11-18 15:26:34,046 INFO L226 Difference]: Without dead ends: 72 [2018-11-18 15:26:34,046 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=82, Invalid=1640, Unknown=0, NotChecked=0, Total=1722 [2018-11-18 15:26:34,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-11-18 15:26:34,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-11-18 15:26:34,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-11-18 15:26:34,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2018-11-18 15:26:34,049 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 121 [2018-11-18 15:26:34,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:26:34,050 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2018-11-18 15:26:34,050 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-11-18 15:26:34,050 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2018-11-18 15:26:34,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-11-18 15:26:34,051 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:26:34,051 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:26:34,051 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:26:34,051 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:26:34,051 INFO L82 PathProgramCache]: Analyzing trace with hash -2010955025, now seen corresponding path program 19 times [2018-11-18 15:26:34,051 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 15:26:34,051 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 15:26:34,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:26:34,052 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 15:26:34,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:26:34,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:26:34,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2018-11-18 15:26:34,693 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:26:34,693 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cd190a51-424a-4e2b-b954-c1dc217663e6/bin-2019/uautomizer/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 15:26:34,700 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:26:34,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:26:34,724 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:26:34,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2018-11-18 15:26:34,795 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 15:26:34,795 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2018-11-18 15:26:34,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-11-18 15:26:34,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-11-18 15:26:34,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=1806, Unknown=0, NotChecked=0, Total=1892 [2018-11-18 15:26:34,796 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 44 states. [2018-11-18 15:26:35,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:26:35,143 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2018-11-18 15:26:35,144 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-11-18 15:26:35,144 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 127 [2018-11-18 15:26:35,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:26:35,144 INFO L225 Difference]: With dead ends: 79 [2018-11-18 15:26:35,144 INFO L226 Difference]: Without dead ends: 75 [2018-11-18 15:26:35,145 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=86, Invalid=1806, Unknown=0, NotChecked=0, Total=1892 [2018-11-18 15:26:35,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-11-18 15:26:35,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-11-18 15:26:35,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-11-18 15:26:35,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2018-11-18 15:26:35,148 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 127 [2018-11-18 15:26:35,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:26:35,149 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2018-11-18 15:26:35,149 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-11-18 15:26:35,149 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2018-11-18 15:26:35,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-11-18 15:26:35,150 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:26:35,150 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:26:35,150 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:26:35,150 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:26:35,150 INFO L82 PathProgramCache]: Analyzing trace with hash -799288067, now seen corresponding path program 20 times [2018-11-18 15:26:35,150 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 15:26:35,150 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 15:26:35,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:26:35,151 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:26:35,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:26:35,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 15:26:35,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 15:26:35,260 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-11-18 15:26:35,286 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.11 03:26:35 BoogieIcfgContainer [2018-11-18 15:26:35,286 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-18 15:26:35,286 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-18 15:26:35,286 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-18 15:26:35,287 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-18 15:26:35,287 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 03:21:26" (3/4) ... [2018-11-18 15:26:35,289 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-11-18 15:26:35,333 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_cd190a51-424a-4e2b-b954-c1dc217663e6/bin-2019/uautomizer/witness.graphml [2018-11-18 15:26:35,333 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-18 15:26:35,334 INFO L168 Benchmark]: Toolchain (without parser) took 309345.78 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 182.5 MB). Free memory was 959.1 MB in the beginning and 1.1 GB in the end (delta: -105.3 MB). Peak memory consumption was 77.2 MB. Max. memory is 11.5 GB. [2018-11-18 15:26:35,335 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 15:26:35,335 INFO L168 Benchmark]: CACSL2BoogieTranslator took 149.84 ms. Allocated memory is still 1.0 GB. Free memory was 959.1 MB in the beginning and 948.3 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 11.5 GB. [2018-11-18 15:26:35,335 INFO L168 Benchmark]: Boogie Preprocessor took 21.55 ms. Allocated memory is still 1.0 GB. Free memory is still 948.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 15:26:35,336 INFO L168 Benchmark]: RCFGBuilder took 189.50 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 161.0 MB). Free memory was 948.3 MB in the beginning and 1.2 GB in the end (delta: -203.2 MB). Peak memory consumption was 22.3 MB. Max. memory is 11.5 GB. [2018-11-18 15:26:35,336 INFO L168 Benchmark]: TraceAbstraction took 308934.81 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 21.5 MB). Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 87.1 MB). Peak memory consumption was 108.6 MB. Max. memory is 11.5 GB. [2018-11-18 15:26:35,336 INFO L168 Benchmark]: Witness Printer took 46.78 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 15:26:35,338 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 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 149.84 ms. Allocated memory is still 1.0 GB. Free memory was 959.1 MB in the beginning and 948.3 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 21.55 ms. Allocated memory is still 1.0 GB. Free memory is still 948.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 189.50 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 161.0 MB). Free memory was 948.3 MB in the beginning and 1.2 GB in the end (delta: -203.2 MB). Peak memory consumption was 22.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 308934.81 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 21.5 MB). Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 87.1 MB). Peak memory consumption was 108.6 MB. Max. memory is 11.5 GB. * Witness Printer took 46.78 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L10] unsigned int input = __VERIFIER_nondet_uint(); [L11] CALL, EXPR id(input) VAL [\old(x)=20] [L5] COND FALSE !(x==0) VAL [\old(x)=20, x=20] [L6] CALL, EXPR id(x-1) VAL [\old(x)=19] [L5] COND FALSE !(x==0) VAL [\old(x)=19, x=19] [L6] CALL, EXPR id(x-1) VAL [\old(x)=18] [L5] COND FALSE !(x==0) VAL [\old(x)=18, x=18] [L6] CALL, EXPR id(x-1) VAL [\old(x)=17] [L5] COND FALSE !(x==0) VAL [\old(x)=17, x=17] [L6] CALL, EXPR id(x-1) VAL [\old(x)=16] [L5] COND FALSE !(x==0) VAL [\old(x)=16, x=16] [L6] CALL, EXPR id(x-1) VAL [\old(x)=15] [L5] COND FALSE !(x==0) VAL [\old(x)=15, x=15] [L6] CALL, EXPR id(x-1) VAL [\old(x)=14] [L5] COND FALSE !(x==0) VAL [\old(x)=14, x=14] [L6] CALL, EXPR id(x-1) VAL [\old(x)=13] [L5] COND FALSE !(x==0) VAL [\old(x)=13, x=13] [L6] CALL, EXPR id(x-1) VAL [\old(x)=12] [L5] COND FALSE !(x==0) VAL [\old(x)=12, x=12] [L6] CALL, EXPR id(x-1) VAL [\old(x)=11] [L5] COND FALSE !(x==0) VAL [\old(x)=11, x=11] [L6] CALL, EXPR id(x-1) VAL [\old(x)=10] [L5] COND FALSE !(x==0) VAL [\old(x)=10, x=10] [L6] CALL, EXPR id(x-1) VAL [\old(x)=9] [L5] COND FALSE !(x==0) VAL [\old(x)=9, x=9] [L6] CALL, EXPR id(x-1) VAL [\old(x)=8] [L5] COND FALSE !(x==0) VAL [\old(x)=8, x=8] [L6] CALL, EXPR id(x-1) VAL [\old(x)=7] [L5] COND FALSE !(x==0) VAL [\old(x)=7, x=7] [L6] CALL, EXPR id(x-1) VAL [\old(x)=6] [L5] COND FALSE !(x==0) VAL [\old(x)=6, x=6] [L6] CALL, EXPR id(x-1) VAL [\old(x)=5] [L5] COND FALSE !(x==0) VAL [\old(x)=5, x=5] [L6] CALL, EXPR id(x-1) VAL [\old(x)=4] [L5] COND FALSE !(x==0) VAL [\old(x)=4, x=4] [L6] CALL, EXPR id(x-1) VAL [\old(x)=3] [L5] COND FALSE !(x==0) VAL [\old(x)=3, x=3] [L6] CALL, EXPR id(x-1) VAL [\old(x)=2] [L5] COND FALSE !(x==0) VAL [\old(x)=2, x=2] [L6] CALL, EXPR id(x-1) VAL [\old(x)=1] [L5] COND FALSE !(x==0) VAL [\old(x)=1, x=1] [L6] CALL, EXPR id(x-1) VAL [\old(x)=0] [L5] COND TRUE x==0 [L5] RET return 0; VAL [\old(x)=0, \result=0, x=0] [L6] EXPR id(x-1) VAL [\old(x)=1, id(x-1)=0, x=1] [L6] RET return id(x-1) + 1; [L6] EXPR id(x-1) VAL [\old(x)=2, id(x-1)=1, x=2] [L6] RET return id(x-1) + 1; [L6] EXPR id(x-1) VAL [\old(x)=3, id(x-1)=2, x=3] [L6] RET return id(x-1) + 1; [L6] EXPR id(x-1) VAL [\old(x)=4, id(x-1)=3, x=4] [L6] RET return id(x-1) + 1; [L6] EXPR id(x-1) VAL [\old(x)=5, id(x-1)=4, x=5] [L6] RET return id(x-1) + 1; [L6] EXPR id(x-1) VAL [\old(x)=6, id(x-1)=5, x=6] [L6] RET return id(x-1) + 1; [L6] EXPR id(x-1) VAL [\old(x)=7, id(x-1)=6, x=7] [L6] RET return id(x-1) + 1; [L6] EXPR id(x-1) VAL [\old(x)=8, id(x-1)=7, x=8] [L6] RET return id(x-1) + 1; [L6] EXPR id(x-1) VAL [\old(x)=9, id(x-1)=8, x=9] [L6] RET return id(x-1) + 1; [L6] EXPR id(x-1) VAL [\old(x)=10, id(x-1)=9, x=10] [L6] RET return id(x-1) + 1; [L6] EXPR id(x-1) VAL [\old(x)=11, id(x-1)=10, x=11] [L6] RET return id(x-1) + 1; [L6] EXPR id(x-1) VAL [\old(x)=12, id(x-1)=11, x=12] [L6] RET return id(x-1) + 1; [L6] EXPR id(x-1) VAL [\old(x)=13, id(x-1)=12, x=13] [L6] RET return id(x-1) + 1; [L6] EXPR id(x-1) VAL [\old(x)=14, id(x-1)=13, x=14] [L6] RET return id(x-1) + 1; [L6] EXPR id(x-1) VAL [\old(x)=15, id(x-1)=14, x=15] [L6] RET return id(x-1) + 1; [L6] EXPR id(x-1) VAL [\old(x)=16, id(x-1)=15, x=16] [L6] RET return id(x-1) + 1; [L6] EXPR id(x-1) VAL [\old(x)=17, id(x-1)=16, x=17] [L6] RET return id(x-1) + 1; [L6] EXPR id(x-1) VAL [\old(x)=18, id(x-1)=17, x=18] [L6] RET return id(x-1) + 1; [L6] EXPR id(x-1) VAL [\old(x)=19, id(x-1)=18, x=19] [L6] RET return id(x-1) + 1; [L6] EXPR id(x-1) VAL [\old(x)=20, id(x-1)=19, x=20] [L6] RET return id(x-1) + 1; [L11] EXPR id(input) VAL [id(input)=20, input=20] [L11] unsigned int result = id(input); [L12] COND TRUE result == 20 VAL [input=20, result=20] [L13] __VERIFIER_error() VAL [input=20, result=20] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. UNSAFE Result, 308.8s OverallTime, 21 OverallIterations, 21 TraceHistogramMax, 3.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 684 SDtfs, 2 SDslu, 14784 SDs, 0 SdLazy, 8747 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1848 GetRequests, 1370 SyntacticMatches, 19 SemanticMatches, 459 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=75occurred in iteration=20, 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: 0.0s AutomataMinimizationTime, 20 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 293.7s SatisfiabilityAnalysisTime, 11.0s InterpolantComputationTime, 2920 NumberOfCodeBlocks, 2920 NumberOfCodeBlocksAsserted, 142 NumberOfCheckSat, 2748 ConstructedInterpolants, 0 QuantifiedInterpolants, 925248 SizeOfPredicates, 19 NumberOfNonLiveVariables, 2850 ConjunctsInSsa, 912 ConjunctsInUnsatCore, 39 InterpolantComputations, 1 PerfectInterpolantSequences, 7600/15200 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...