./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/recursive-simple/sum_20x0_true-unreach-call_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5842f4b8 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_6083610d-c351-4331-8d4e-9a14015649ca/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_6083610d-c351-4331-8d4e-9a14015649ca/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_6083610d-c351-4331-8d4e-9a14015649ca/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_6083610d-c351-4331-8d4e-9a14015649ca/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/sum_20x0_true-unreach-call_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_6083610d-c351-4331-8d4e-9a14015649ca/bin-2019/uautomizer/config/svcomp-Reach-32bit-PetriAutomizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_6083610d-c351-4331-8d4e-9a14015649ca/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 f4078ef7bc39da0337b6d8ed5ecbbcec336a37b8 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-5842f4b [2018-11-18 12:26:23,386 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-18 12:26:23,387 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-18 12:26:23,394 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-18 12:26:23,394 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-18 12:26:23,395 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-18 12:26:23,396 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-18 12:26:23,397 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-18 12:26:23,398 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-18 12:26:23,398 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-18 12:26:23,399 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-18 12:26:23,399 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-18 12:26:23,400 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-18 12:26:23,401 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-18 12:26:23,402 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-18 12:26:23,402 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-18 12:26:23,403 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-18 12:26:23,404 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-18 12:26:23,406 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-18 12:26:23,407 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-18 12:26:23,408 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-18 12:26:23,408 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-18 12:26:23,410 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-18 12:26:23,410 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-18 12:26:23,410 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-18 12:26:23,411 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-18 12:26:23,412 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-18 12:26:23,412 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-18 12:26:23,413 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-18 12:26:23,414 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-18 12:26:23,414 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-18 12:26:23,415 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-18 12:26:23,415 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-18 12:26:23,415 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-18 12:26:23,416 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-18 12:26:23,417 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-18 12:26:23,417 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_6083610d-c351-4331-8d4e-9a14015649ca/bin-2019/uautomizer/config/svcomp-Reach-32bit-PetriAutomizer_Default.epf [2018-11-18 12:26:23,425 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-18 12:26:23,425 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-18 12:26:23,425 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-18 12:26:23,425 INFO L133 SettingsManager]: * Process only entry and re-entry procedures=false [2018-11-18 12:26:23,426 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-18 12:26:23,426 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-18 12:26:23,426 INFO L133 SettingsManager]: * Use SBE=true [2018-11-18 12:26:23,426 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-18 12:26:23,427 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-18 12:26:23,427 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-18 12:26:23,427 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-18 12:26:23,427 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-18 12:26:23,427 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-18 12:26:23,427 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-18 12:26:23,428 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-18 12:26:23,428 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-18 12:26:23,428 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-18 12:26:23,428 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-18 12:26:23,428 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-18 12:26:23,428 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-18 12:26:23,428 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-18 12:26:23,429 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-18 12:26:23,429 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-18 12:26:23,429 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 12:26:23,431 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-18 12:26:23,431 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-18 12:26:23,431 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-18 12:26:23,431 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-18 12:26:23,431 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-18 12:26:23,432 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-18 12:26:23,432 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_6083610d-c351-4331-8d4e-9a14015649ca/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 -> f4078ef7bc39da0337b6d8ed5ecbbcec336a37b8 [2018-11-18 12:26:23,455 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-18 12:26:23,465 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-18 12:26:23,467 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-18 12:26:23,468 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-18 12:26:23,469 INFO L276 PluginConnector]: CDTParser initialized [2018-11-18 12:26:23,471 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_6083610d-c351-4331-8d4e-9a14015649ca/bin-2019/uautomizer/../../sv-benchmarks/c/recursive-simple/sum_20x0_true-unreach-call_true-termination.c [2018-11-18 12:26:23,514 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_6083610d-c351-4331-8d4e-9a14015649ca/bin-2019/uautomizer/data/fa3ba8d42/f8c6a8b480df4be892ec4214999e6fa3/FLAG0e6b1d1b1 [2018-11-18 12:26:23,900 INFO L307 CDTParser]: Found 1 translation units. [2018-11-18 12:26:23,901 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_6083610d-c351-4331-8d4e-9a14015649ca/sv-benchmarks/c/recursive-simple/sum_20x0_true-unreach-call_true-termination.c [2018-11-18 12:26:23,904 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_6083610d-c351-4331-8d4e-9a14015649ca/bin-2019/uautomizer/data/fa3ba8d42/f8c6a8b480df4be892ec4214999e6fa3/FLAG0e6b1d1b1 [2018-11-18 12:26:23,913 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_6083610d-c351-4331-8d4e-9a14015649ca/bin-2019/uautomizer/data/fa3ba8d42/f8c6a8b480df4be892ec4214999e6fa3 [2018-11-18 12:26:23,915 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-18 12:26:23,916 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-18 12:26:23,916 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-18 12:26:23,916 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-18 12:26:23,919 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-18 12:26:23,920 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 12:26:23" (1/1) ... [2018-11-18 12:26:23,922 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36486ed1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:26:23, skipping insertion in model container [2018-11-18 12:26:23,922 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 12:26:23" (1/1) ... [2018-11-18 12:26:23,928 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-18 12:26:23,940 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-18 12:26:24,040 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 12:26:24,042 INFO L191 MainTranslator]: Completed pre-run [2018-11-18 12:26:24,051 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 12:26:24,059 INFO L195 MainTranslator]: Completed translation [2018-11-18 12:26:24,059 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:26:24 WrapperNode [2018-11-18 12:26:24,059 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-18 12:26:24,059 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-18 12:26:24,059 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-18 12:26:24,059 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-18 12:26:24,070 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:26:24" (1/1) ... [2018-11-18 12:26:24,070 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:26:24" (1/1) ... [2018-11-18 12:26:24,074 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:26:24" (1/1) ... [2018-11-18 12:26:24,074 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:26:24" (1/1) ... [2018-11-18 12:26:24,077 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:26:24" (1/1) ... [2018-11-18 12:26:24,078 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:26:24" (1/1) ... [2018-11-18 12:26:24,079 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:26:24" (1/1) ... [2018-11-18 12:26:24,080 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-18 12:26:24,080 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-18 12:26:24,080 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-18 12:26:24,080 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-18 12:26:24,081 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:26:24" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6083610d-c351-4331-8d4e-9a14015649ca/bin-2019/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 12:26:24,161 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-18 12:26:24,161 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-18 12:26:24,161 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2018-11-18 12:26:24,161 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-18 12:26:24,161 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-11-18 12:26:24,161 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2018-11-18 12:26:24,161 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-18 12:26:24,161 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-18 12:26:24,162 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-18 12:26:24,246 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-18 12:26:24,247 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 12:26:24 BoogieIcfgContainer [2018-11-18 12:26:24,247 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-18 12:26:24,247 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-18 12:26:24,247 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-18 12:26:24,249 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-18 12:26:24,249 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 12:26:23" (1/3) ... [2018-11-18 12:26:24,250 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@523d1830 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 12:26:24, skipping insertion in model container [2018-11-18 12:26:24,250 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:26:24" (2/3) ... [2018-11-18 12:26:24,250 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@523d1830 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 12:26:24, skipping insertion in model container [2018-11-18 12:26:24,250 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 12:26:24" (3/3) ... [2018-11-18 12:26:24,252 INFO L112 eAbstractionObserver]: Analyzing ICFG sum_20x0_true-unreach-call_true-termination.c [2018-11-18 12:26:24,257 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-18 12:26:24,262 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-18 12:26:24,271 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-18 12:26:24,290 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-18 12:26:24,291 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-18 12:26:24,291 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-18 12:26:24,291 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-18 12:26:24,291 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-18 12:26:24,291 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-18 12:26:24,291 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-18 12:26:24,291 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-18 12:26:24,292 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-18 12:26:24,304 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2018-11-18 12:26:24,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-18 12:26:24,308 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:26:24,308 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:26:24,310 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:26:24,314 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:26:24,314 INFO L82 PathProgramCache]: Analyzing trace with hash 2001781660, now seen corresponding path program 1 times [2018-11-18 12:26:24,315 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:26:24,315 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:26:24,344 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:26:24,344 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:26:24,344 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:26:24,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:26:24,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:26:24,429 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 12:26:24,429 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-18 12:26:24,432 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 12:26:24,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 12:26:24,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 12:26:24,443 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2018-11-18 12:26:24,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:26:24,518 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2018-11-18 12:26:24,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 12:26:24,519 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-11-18 12:26:24,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:26:24,525 INFO L225 Difference]: With dead ends: 30 [2018-11-18 12:26:24,525 INFO L226 Difference]: Without dead ends: 18 [2018-11-18 12:26:24,527 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-18 12:26:24,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-11-18 12:26:24,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-11-18 12:26:24,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-11-18 12:26:24,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2018-11-18 12:26:24,559 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2018-11-18 12:26:24,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:26:24,559 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2018-11-18 12:26:24,559 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 12:26:24,559 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2018-11-18 12:26:24,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-11-18 12:26:24,560 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:26:24,560 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 12:26:24,560 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:26:24,561 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:26:24,561 INFO L82 PathProgramCache]: Analyzing trace with hash -118151420, now seen corresponding path program 1 times [2018-11-18 12:26:24,561 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:26:24,561 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:26:24,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:26:24,562 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:26:24,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:26:24,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:26:24,624 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 12:26:24,624 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:26:24,624 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6083610d-c351-4331-8d4e-9a14015649ca/bin-2019/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 12:26:24,637 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:26:24,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:26:24,656 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:26:24,676 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 12:26:24,692 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:26:24,692 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-11-18 12:26:24,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-18 12:26:24,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-18 12:26:24,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-11-18 12:26:24,693 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2018-11-18 12:26:24,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:26:24,749 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-11-18 12:26:24,749 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-18 12:26:24,749 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2018-11-18 12:26:24,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:26:24,750 INFO L225 Difference]: With dead ends: 25 [2018-11-18 12:26:24,750 INFO L226 Difference]: Without dead ends: 21 [2018-11-18 12:26:24,751 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-11-18 12:26:24,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-11-18 12:26:24,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-11-18 12:26:24,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-11-18 12:26:24,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-11-18 12:26:24,756 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2018-11-18 12:26:24,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:26:24,756 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-11-18 12:26:24,756 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-18 12:26:24,756 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-11-18 12:26:24,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-11-18 12:26:24,757 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:26:24,757 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 12:26:24,757 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:26:24,757 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:26:24,757 INFO L82 PathProgramCache]: Analyzing trace with hash 764931548, now seen corresponding path program 2 times [2018-11-18 12:26:24,758 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:26:24,758 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:26:24,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:26:24,758 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:26:24,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:26:24,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:26:24,842 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 12:26:24,843 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:26:24,843 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6083610d-c351-4331-8d4e-9a14015649ca/bin-2019/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 12:26:24,856 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-18 12:26:24,873 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-18 12:26:24,873 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:26:24,875 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:26:24,886 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 12:26:24,911 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:26:24,911 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-11-18 12:26:24,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-18 12:26:24,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-18 12:26:24,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-11-18 12:26:24,912 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 7 states. [2018-11-18 12:26:25,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:26:25,002 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2018-11-18 12:26:25,002 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-18 12:26:25,002 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2018-11-18 12:26:25,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:26:25,003 INFO L225 Difference]: With dead ends: 28 [2018-11-18 12:26:25,003 INFO L226 Difference]: Without dead ends: 24 [2018-11-18 12:26:25,003 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-11-18 12:26:25,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-11-18 12:26:25,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-11-18 12:26:25,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-11-18 12:26:25,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2018-11-18 12:26:25,008 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2018-11-18 12:26:25,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:26:25,008 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2018-11-18 12:26:25,008 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-18 12:26:25,009 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2018-11-18 12:26:25,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-11-18 12:26:25,010 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:26:25,010 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 12:26:25,010 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:26:25,011 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:26:25,011 INFO L82 PathProgramCache]: Analyzing trace with hash 601942852, now seen corresponding path program 3 times [2018-11-18 12:26:25,011 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:26:25,011 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:26:25,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:26:25,012 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 12:26:25,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:26:25,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:26:25,074 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 12:26:25,075 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:26:25,075 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6083610d-c351-4331-8d4e-9a14015649ca/bin-2019/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 12:26:25,085 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 12:26:25,099 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-11-18 12:26:25,099 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:26:25,101 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:26:25,112 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 12:26:25,130 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:26:25,130 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-11-18 12:26:25,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-18 12:26:25,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-18 12:26:25,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-11-18 12:26:25,131 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 8 states. [2018-11-18 12:26:25,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:26:25,174 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2018-11-18 12:26:25,174 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-18 12:26:25,174 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2018-11-18 12:26:25,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:26:25,175 INFO L225 Difference]: With dead ends: 31 [2018-11-18 12:26:25,175 INFO L226 Difference]: Without dead ends: 27 [2018-11-18 12:26:25,175 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2018-11-18 12:26:25,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-11-18 12:26:25,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-11-18 12:26:25,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-11-18 12:26:25,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-11-18 12:26:25,180 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2018-11-18 12:26:25,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:26:25,180 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-11-18 12:26:25,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-18 12:26:25,180 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-11-18 12:26:25,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-11-18 12:26:25,182 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:26:25,182 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 12:26:25,182 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:26:25,182 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:26:25,182 INFO L82 PathProgramCache]: Analyzing trace with hash -183109604, now seen corresponding path program 4 times [2018-11-18 12:26:25,183 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:26:25,183 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:26:25,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:26:25,183 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 12:26:25,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:26:25,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:26:25,267 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 12:26:25,267 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:26:25,267 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6083610d-c351-4331-8d4e-9a14015649ca/bin-2019/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 12:26:25,273 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 12:26:25,286 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 12:26:25,286 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:26:25,288 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:26:25,301 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 12:26:25,316 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:26:25,317 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-11-18 12:26:25,317 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-18 12:26:25,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-18 12:26:25,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-11-18 12:26:25,317 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 9 states. [2018-11-18 12:26:25,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:26:25,375 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2018-11-18 12:26:25,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-18 12:26:25,375 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2018-11-18 12:26:25,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:26:25,376 INFO L225 Difference]: With dead ends: 34 [2018-11-18 12:26:25,376 INFO L226 Difference]: Without dead ends: 30 [2018-11-18 12:26:25,376 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2018-11-18 12:26:25,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-11-18 12:26:25,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-11-18 12:26:25,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-11-18 12:26:25,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2018-11-18 12:26:25,381 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2018-11-18 12:26:25,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:26:25,381 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2018-11-18 12:26:25,381 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-18 12:26:25,381 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2018-11-18 12:26:25,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-11-18 12:26:25,382 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:26:25,382 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 12:26:25,383 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:26:25,383 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:26:25,383 INFO L82 PathProgramCache]: Analyzing trace with hash -155447420, now seen corresponding path program 5 times [2018-11-18 12:26:25,383 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:26:25,383 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:26:25,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:26:25,384 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 12:26:25,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:26:25,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:26:25,470 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 12:26:25,471 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:26:25,471 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6083610d-c351-4331-8d4e-9a14015649ca/bin-2019/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 12:26:25,477 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-18 12:26:25,510 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-11-18 12:26:25,510 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:26:25,512 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:26:25,531 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 12:26:25,546 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:26:25,546 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-11-18 12:26:25,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-18 12:26:25,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-18 12:26:25,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-11-18 12:26:25,547 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 10 states. [2018-11-18 12:26:25,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:26:25,624 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2018-11-18 12:26:25,624 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-18 12:26:25,624 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2018-11-18 12:26:25,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:26:25,625 INFO L225 Difference]: With dead ends: 37 [2018-11-18 12:26:25,625 INFO L226 Difference]: Without dead ends: 33 [2018-11-18 12:26:25,625 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2018-11-18 12:26:25,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-11-18 12:26:25,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-11-18 12:26:25,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-11-18 12:26:25,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-11-18 12:26:25,629 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2018-11-18 12:26:25,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:26:25,629 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-11-18 12:26:25,629 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-18 12:26:25,629 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-11-18 12:26:25,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-11-18 12:26:25,630 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:26:25,630 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 12:26:25,631 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:26:25,631 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:26:25,631 INFO L82 PathProgramCache]: Analyzing trace with hash 1716183644, now seen corresponding path program 6 times [2018-11-18 12:26:25,631 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:26:25,631 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:26:25,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:26:25,632 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 12:26:25,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:26:25,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:26:25,712 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 12:26:25,712 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:26:25,712 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6083610d-c351-4331-8d4e-9a14015649ca/bin-2019/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 12:26:25,718 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-18 12:26:25,739 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-11-18 12:26:25,739 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:26:25,741 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:26:25,757 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 12:26:25,772 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:26:25,772 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-11-18 12:26:25,772 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-18 12:26:25,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-18 12:26:25,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2018-11-18 12:26:25,773 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 11 states. [2018-11-18 12:26:25,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:26:25,835 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2018-11-18 12:26:25,836 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-18 12:26:25,836 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2018-11-18 12:26:25,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:26:25,836 INFO L225 Difference]: With dead ends: 40 [2018-11-18 12:26:25,837 INFO L226 Difference]: Without dead ends: 36 [2018-11-18 12:26:25,837 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2018-11-18 12:26:25,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-11-18 12:26:25,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-11-18 12:26:25,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-11-18 12:26:25,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2018-11-18 12:26:25,842 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2018-11-18 12:26:25,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:26:25,844 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2018-11-18 12:26:25,844 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-18 12:26:25,844 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2018-11-18 12:26:25,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-11-18 12:26:25,845 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:26:25,845 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 12:26:25,845 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:26:25,845 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:26:25,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1079602236, now seen corresponding path program 7 times [2018-11-18 12:26:25,845 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:26:25,846 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:26:25,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:26:25,846 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 12:26:25,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:26:25,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:26:25,947 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 12:26:25,947 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:26:25,948 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6083610d-c351-4331-8d4e-9a14015649ca/bin-2019/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 12:26:25,955 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:26:25,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:26:25,972 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:26:25,983 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 12:26:25,999 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:26:25,999 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-11-18 12:26:25,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-18 12:26:25,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-18 12:26:26,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2018-11-18 12:26:26,000 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 12 states. [2018-11-18 12:26:26,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:26:26,082 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2018-11-18 12:26:26,083 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-18 12:26:26,083 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2018-11-18 12:26:26,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:26:26,084 INFO L225 Difference]: With dead ends: 43 [2018-11-18 12:26:26,084 INFO L226 Difference]: Without dead ends: 39 [2018-11-18 12:26:26,086 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2018-11-18 12:26:26,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-11-18 12:26:26,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-11-18 12:26:26,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-11-18 12:26:26,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2018-11-18 12:26:26,090 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2018-11-18 12:26:26,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:26:26,090 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2018-11-18 12:26:26,090 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-18 12:26:26,090 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2018-11-18 12:26:26,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-11-18 12:26:26,091 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:26:26,092 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 12:26:26,092 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:26:26,092 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:26:26,092 INFO L82 PathProgramCache]: Analyzing trace with hash 1035381916, now seen corresponding path program 8 times [2018-11-18 12:26:26,092 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:26:26,092 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:26:26,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:26:26,095 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:26:26,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:26:26,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:26:26,184 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 12:26:26,184 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:26:26,185 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6083610d-c351-4331-8d4e-9a14015649ca/bin-2019/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 12:26:26,190 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-18 12:26:26,203 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-18 12:26:26,203 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:26:26,205 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:26:26,221 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 12:26:26,241 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:26:26,241 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-11-18 12:26:26,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-18 12:26:26,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-18 12:26:26,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2018-11-18 12:26:26,242 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 13 states. [2018-11-18 12:26:26,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:26:26,337 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2018-11-18 12:26:26,337 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-18 12:26:26,337 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2018-11-18 12:26:26,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:26:26,338 INFO L225 Difference]: With dead ends: 46 [2018-11-18 12:26:26,338 INFO L226 Difference]: Without dead ends: 42 [2018-11-18 12:26:26,339 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2018-11-18 12:26:26,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-11-18 12:26:26,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-11-18 12:26:26,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-11-18 12:26:26,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2018-11-18 12:26:26,343 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2018-11-18 12:26:26,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:26:26,343 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2018-11-18 12:26:26,343 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-18 12:26:26,343 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2018-11-18 12:26:26,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-11-18 12:26:26,344 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:26:26,344 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 12:26:26,344 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:26:26,344 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:26:26,345 INFO L82 PathProgramCache]: Analyzing trace with hash 952137732, now seen corresponding path program 9 times [2018-11-18 12:26:26,345 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:26:26,345 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:26:26,345 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:26:26,345 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 12:26:26,346 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:26:26,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:26:26,449 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 12:26:26,449 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:26:26,449 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6083610d-c351-4331-8d4e-9a14015649ca/bin-2019/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 12:26:26,459 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 12:26:26,479 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-11-18 12:26:26,479 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:26:26,482 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:26:26,499 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 12:26:26,515 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:26:26,515 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-11-18 12:26:26,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-18 12:26:26,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-18 12:26:26,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2018-11-18 12:26:26,516 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 14 states. [2018-11-18 12:26:26,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:26:26,611 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2018-11-18 12:26:26,611 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-18 12:26:26,612 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 67 [2018-11-18 12:26:26,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:26:26,612 INFO L225 Difference]: With dead ends: 49 [2018-11-18 12:26:26,612 INFO L226 Difference]: Without dead ends: 45 [2018-11-18 12:26:26,613 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2018-11-18 12:26:26,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-11-18 12:26:26,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-11-18 12:26:26,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-11-18 12:26:26,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2018-11-18 12:26:26,616 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2018-11-18 12:26:26,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:26:26,616 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2018-11-18 12:26:26,616 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-18 12:26:26,616 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2018-11-18 12:26:26,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-11-18 12:26:26,617 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:26:26,617 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 12:26:26,617 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:26:26,617 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:26:26,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1540970204, now seen corresponding path program 10 times [2018-11-18 12:26:26,618 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:26:26,618 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:26:26,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:26:26,618 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 12:26:26,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:26:26,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:26:26,719 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 12:26:26,720 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:26:26,720 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6083610d-c351-4331-8d4e-9a14015649ca/bin-2019/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 12:26:26,730 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 12:26:26,750 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 12:26:26,750 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:26:26,752 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:26:26,775 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 12:26:26,791 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:26:26,791 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-11-18 12:26:26,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-18 12:26:26,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-18 12:26:26,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2018-11-18 12:26:26,792 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 15 states. [2018-11-18 12:26:26,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:26:26,921 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2018-11-18 12:26:26,921 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-18 12:26:26,921 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 73 [2018-11-18 12:26:26,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:26:26,922 INFO L225 Difference]: With dead ends: 52 [2018-11-18 12:26:26,922 INFO L226 Difference]: Without dead ends: 48 [2018-11-18 12:26:26,922 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=236, Invalid=414, Unknown=0, NotChecked=0, Total=650 [2018-11-18 12:26:26,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-11-18 12:26:26,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-11-18 12:26:26,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-11-18 12:26:26,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2018-11-18 12:26:26,926 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2018-11-18 12:26:26,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:26:26,927 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2018-11-18 12:26:26,927 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-18 12:26:26,927 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2018-11-18 12:26:26,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-11-18 12:26:26,928 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:26:26,928 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 12:26:26,928 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:26:26,928 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:26:26,928 INFO L82 PathProgramCache]: Analyzing trace with hash -2010530748, now seen corresponding path program 11 times [2018-11-18 12:26:26,928 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:26:26,928 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:26:26,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:26:26,929 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 12:26:26,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:26:26,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:26:27,053 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 12:26:27,053 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:26:27,053 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6083610d-c351-4331-8d4e-9a14015649ca/bin-2019/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 12:26:27,061 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-18 12:26:27,110 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-11-18 12:26:27,110 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:26:27,113 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:26:27,137 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 12:26:27,162 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:26:27,162 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-11-18 12:26:27,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-18 12:26:27,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-18 12:26:27,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2018-11-18 12:26:27,162 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 16 states. [2018-11-18 12:26:27,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:26:27,277 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2018-11-18 12:26:27,277 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-18 12:26:27,277 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 79 [2018-11-18 12:26:27,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:26:27,278 INFO L225 Difference]: With dead ends: 55 [2018-11-18 12:26:27,278 INFO L226 Difference]: Without dead ends: 51 [2018-11-18 12:26:27,279 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=275, Invalid=481, Unknown=0, NotChecked=0, Total=756 [2018-11-18 12:26:27,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-11-18 12:26:27,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-11-18 12:26:27,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-11-18 12:26:27,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2018-11-18 12:26:27,284 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2018-11-18 12:26:27,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:26:27,285 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2018-11-18 12:26:27,285 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-18 12:26:27,285 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2018-11-18 12:26:27,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-11-18 12:26:27,286 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:26:27,286 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 12:26:27,286 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:26:27,286 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:26:27,286 INFO L82 PathProgramCache]: Analyzing trace with hash -986521316, now seen corresponding path program 12 times [2018-11-18 12:26:27,286 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:26:27,286 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:26:27,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:26:27,287 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 12:26:27,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:26:27,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:26:27,437 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 12:26:27,437 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:26:27,437 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6083610d-c351-4331-8d4e-9a14015649ca/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 12:26:27,447 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-18 12:26:27,468 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-11-18 12:26:27,468 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:26:27,472 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:26:27,488 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 12:26:27,504 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:26:27,504 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-11-18 12:26:27,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-18 12:26:27,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-18 12:26:27,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2018-11-18 12:26:27,504 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 17 states. [2018-11-18 12:26:27,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:26:27,633 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2018-11-18 12:26:27,633 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-18 12:26:27,633 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 85 [2018-11-18 12:26:27,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:26:27,633 INFO L225 Difference]: With dead ends: 58 [2018-11-18 12:26:27,634 INFO L226 Difference]: Without dead ends: 54 [2018-11-18 12:26:27,634 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=317, Invalid=553, Unknown=0, NotChecked=0, Total=870 [2018-11-18 12:26:27,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-11-18 12:26:27,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-11-18 12:26:27,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-11-18 12:26:27,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2018-11-18 12:26:27,637 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2018-11-18 12:26:27,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:26:27,638 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2018-11-18 12:26:27,638 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-18 12:26:27,638 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2018-11-18 12:26:27,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-11-18 12:26:27,639 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:26:27,639 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 12:26:27,639 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:26:27,639 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:26:27,639 INFO L82 PathProgramCache]: Analyzing trace with hash 1073897604, now seen corresponding path program 13 times [2018-11-18 12:26:27,639 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:26:27,639 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:26:27,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:26:27,640 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 12:26:27,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:26:27,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:26:27,763 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 12:26:27,763 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:26:27,764 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6083610d-c351-4331-8d4e-9a14015649ca/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 12:26:27,771 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:26:27,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:26:27,792 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:26:27,813 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 12:26:27,828 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:26:27,828 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-11-18 12:26:27,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-18 12:26:27,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-18 12:26:27,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2018-11-18 12:26:27,829 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 18 states. [2018-11-18 12:26:27,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:26:27,993 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2018-11-18 12:26:27,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-11-18 12:26:27,993 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 91 [2018-11-18 12:26:27,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:26:27,994 INFO L225 Difference]: With dead ends: 61 [2018-11-18 12:26:27,994 INFO L226 Difference]: Without dead ends: 57 [2018-11-18 12:26:27,994 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=362, Invalid=630, Unknown=0, NotChecked=0, Total=992 [2018-11-18 12:26:27,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-11-18 12:26:27,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-11-18 12:26:27,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-11-18 12:26:27,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2018-11-18 12:26:27,997 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2018-11-18 12:26:27,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:26:27,998 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2018-11-18 12:26:27,998 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-18 12:26:27,998 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2018-11-18 12:26:27,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-11-18 12:26:27,999 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:26:27,999 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 12:26:27,999 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:26:27,999 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:26:27,999 INFO L82 PathProgramCache]: Analyzing trace with hash -1572648100, now seen corresponding path program 14 times [2018-11-18 12:26:27,999 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:26:27,999 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:26:28,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:26:28,000 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:26:28,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:26:28,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:26:28,154 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 12:26:28,154 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:26:28,154 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6083610d-c351-4331-8d4e-9a14015649ca/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 12:26:28,163 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-18 12:26:28,185 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-18 12:26:28,185 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:26:28,188 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:26:28,209 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 12:26:28,224 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:26:28,225 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-11-18 12:26:28,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-11-18 12:26:28,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-11-18 12:26:28,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2018-11-18 12:26:28,225 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 19 states. [2018-11-18 12:26:28,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:26:28,398 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2018-11-18 12:26:28,398 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-18 12:26:28,398 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 97 [2018-11-18 12:26:28,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:26:28,399 INFO L225 Difference]: With dead ends: 64 [2018-11-18 12:26:28,399 INFO L226 Difference]: Without dead ends: 60 [2018-11-18 12:26:28,399 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=410, Invalid=712, Unknown=0, NotChecked=0, Total=1122 [2018-11-18 12:26:28,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-11-18 12:26:28,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-11-18 12:26:28,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-11-18 12:26:28,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2018-11-18 12:26:28,404 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2018-11-18 12:26:28,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:26:28,405 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2018-11-18 12:26:28,405 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-11-18 12:26:28,405 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2018-11-18 12:26:28,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-11-18 12:26:28,406 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:26:28,406 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 12:26:28,406 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:26:28,406 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:26:28,406 INFO L82 PathProgramCache]: Analyzing trace with hash 1584030916, now seen corresponding path program 15 times [2018-11-18 12:26:28,406 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:26:28,406 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:26:28,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:26:28,407 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 12:26:28,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:26:28,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:26:28,538 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 12:26:28,538 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:26:28,538 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6083610d-c351-4331-8d4e-9a14015649ca/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 12:26:28,544 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 12:26:28,569 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-11-18 12:26:28,569 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:26:28,571 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:26:28,587 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 12:26:28,607 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:26:28,607 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-11-18 12:26:28,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-18 12:26:28,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-18 12:26:28,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=223, Unknown=0, NotChecked=0, Total=380 [2018-11-18 12:26:28,608 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 20 states. [2018-11-18 12:26:28,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:26:28,773 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2018-11-18 12:26:28,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-11-18 12:26:28,773 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 103 [2018-11-18 12:26:28,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:26:28,773 INFO L225 Difference]: With dead ends: 67 [2018-11-18 12:26:28,773 INFO L226 Difference]: Without dead ends: 63 [2018-11-18 12:26:28,774 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=461, Invalid=799, Unknown=0, NotChecked=0, Total=1260 [2018-11-18 12:26:28,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-11-18 12:26:28,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-11-18 12:26:28,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-11-18 12:26:28,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2018-11-18 12:26:28,778 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 103 [2018-11-18 12:26:28,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:26:28,778 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2018-11-18 12:26:28,778 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-18 12:26:28,778 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2018-11-18 12:26:28,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-11-18 12:26:28,779 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:26:28,779 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 12:26:28,779 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:26:28,780 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:26:28,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1066046876, now seen corresponding path program 16 times [2018-11-18 12:26:28,780 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:26:28,780 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:26:28,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:26:28,780 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 12:26:28,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:26:28,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:26:28,939 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 12:26:28,939 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:26:28,939 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6083610d-c351-4331-8d4e-9a14015649ca/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 12:26:28,946 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 12:26:28,973 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 12:26:28,973 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:26:28,977 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:26:29,001 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 12:26:29,020 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:26:29,020 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-11-18 12:26:29,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-18 12:26:29,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-18 12:26:29,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=245, Unknown=0, NotChecked=0, Total=420 [2018-11-18 12:26:29,021 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 21 states. [2018-11-18 12:26:29,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:26:29,170 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2018-11-18 12:26:29,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-11-18 12:26:29,170 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 109 [2018-11-18 12:26:29,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:26:29,171 INFO L225 Difference]: With dead ends: 70 [2018-11-18 12:26:29,171 INFO L226 Difference]: Without dead ends: 66 [2018-11-18 12:26:29,171 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=515, Invalid=891, Unknown=0, NotChecked=0, Total=1406 [2018-11-18 12:26:29,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-11-18 12:26:29,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-11-18 12:26:29,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-11-18 12:26:29,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2018-11-18 12:26:29,174 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 109 [2018-11-18 12:26:29,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:26:29,174 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2018-11-18 12:26:29,175 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-18 12:26:29,175 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2018-11-18 12:26:29,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-11-18 12:26:29,175 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:26:29,175 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 12:26:29,175 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:26:29,175 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:26:29,175 INFO L82 PathProgramCache]: Analyzing trace with hash 1300351236, now seen corresponding path program 17 times [2018-11-18 12:26:29,175 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:26:29,175 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:26:29,176 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:26:29,176 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 12:26:29,176 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:26:29,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:26:29,357 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 12:26:29,357 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:26:29,357 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6083610d-c351-4331-8d4e-9a14015649ca/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 12:26:29,363 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-18 12:26:29,398 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-11-18 12:26:29,398 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:26:29,400 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:26:29,417 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 12:26:29,432 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:26:29,432 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-11-18 12:26:29,432 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-11-18 12:26:29,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-11-18 12:26:29,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=268, Unknown=0, NotChecked=0, Total=462 [2018-11-18 12:26:29,433 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 22 states. [2018-11-18 12:26:29,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:26:29,613 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2018-11-18 12:26:29,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-11-18 12:26:29,613 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 115 [2018-11-18 12:26:29,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:26:29,613 INFO L225 Difference]: With dead ends: 73 [2018-11-18 12:26:29,613 INFO L226 Difference]: Without dead ends: 69 [2018-11-18 12:26:29,614 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=572, Invalid=988, Unknown=0, NotChecked=0, Total=1560 [2018-11-18 12:26:29,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-11-18 12:26:29,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-11-18 12:26:29,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-11-18 12:26:29,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2018-11-18 12:26:29,617 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 115 [2018-11-18 12:26:29,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:26:29,617 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2018-11-18 12:26:29,618 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-11-18 12:26:29,618 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2018-11-18 12:26:29,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-11-18 12:26:29,618 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:26:29,618 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 12:26:29,618 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:26:29,619 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:26:29,619 INFO L82 PathProgramCache]: Analyzing trace with hash 227065820, now seen corresponding path program 18 times [2018-11-18 12:26:29,619 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:26:29,619 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:26:29,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:26:29,619 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 12:26:29,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:26:29,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:26:29,811 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 12:26:29,811 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:26:29,811 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6083610d-c351-4331-8d4e-9a14015649ca/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 12:26:29,817 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-18 12:26:29,847 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-11-18 12:26:29,847 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:26:29,849 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:26:29,869 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 12:26:29,892 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:26:29,892 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-11-18 12:26:29,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-11-18 12:26:29,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-11-18 12:26:29,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=292, Unknown=0, NotChecked=0, Total=506 [2018-11-18 12:26:29,893 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 23 states. [2018-11-18 12:26:30,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:26:30,094 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2018-11-18 12:26:30,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-11-18 12:26:30,095 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 121 [2018-11-18 12:26:30,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:26:30,095 INFO L225 Difference]: With dead ends: 76 [2018-11-18 12:26:30,096 INFO L226 Difference]: Without dead ends: 72 [2018-11-18 12:26:30,096 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=632, Invalid=1090, Unknown=0, NotChecked=0, Total=1722 [2018-11-18 12:26:30,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-11-18 12:26:30,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-11-18 12:26:30,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-11-18 12:26:30,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2018-11-18 12:26:30,100 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 121 [2018-11-18 12:26:30,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:26:30,100 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2018-11-18 12:26:30,100 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-11-18 12:26:30,100 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2018-11-18 12:26:30,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-11-18 12:26:30,101 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:26:30,101 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 12:26:30,101 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:26:30,101 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:26:30,101 INFO L82 PathProgramCache]: Analyzing trace with hash -479687356, now seen corresponding path program 19 times [2018-11-18 12:26:30,101 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:26:30,101 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:26:30,102 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:26:30,102 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 12:26:30,102 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:26:30,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:26:30,296 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 12:26:30,296 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:26:30,296 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6083610d-c351-4331-8d4e-9a14015649ca/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 12:26:30,303 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:26:30,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:26:30,327 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:26:30,351 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 12:26:30,367 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:26:30,367 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-11-18 12:26:30,368 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-11-18 12:26:30,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-11-18 12:26:30,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=317, Unknown=0, NotChecked=0, Total=552 [2018-11-18 12:26:30,368 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 24 states. [2018-11-18 12:26:30,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:26:30,622 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2018-11-18 12:26:30,623 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-11-18 12:26:30,623 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 127 [2018-11-18 12:26:30,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:26:30,624 INFO L225 Difference]: With dead ends: 79 [2018-11-18 12:26:30,624 INFO L226 Difference]: Without dead ends: 75 [2018-11-18 12:26:30,625 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=695, Invalid=1197, Unknown=0, NotChecked=0, Total=1892 [2018-11-18 12:26:30,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-11-18 12:26:30,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-11-18 12:26:30,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-11-18 12:26:30,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2018-11-18 12:26:30,628 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 127 [2018-11-18 12:26:30,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:26:30,628 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2018-11-18 12:26:30,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-11-18 12:26:30,628 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2018-11-18 12:26:30,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-11-18 12:26:30,629 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:26:30,629 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 12:26:30,629 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:26:30,633 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:26:30,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1598174692, now seen corresponding path program 20 times [2018-11-18 12:26:30,633 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:26:30,633 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:26:30,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:26:30,634 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:26:30,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:26:30,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:26:31,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 649 refuted. 0 times theorem prover too weak. 571 trivial. 0 not checked. [2018-11-18 12:26:31,684 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:26:31,684 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6083610d-c351-4331-8d4e-9a14015649ca/bin-2019/uautomizer/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 12:26:31,690 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-18 12:26:31,717 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-18 12:26:31,717 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:26:31,721 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:26:31,959 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 39 proven. 610 refuted. 0 times theorem prover too weak. 571 trivial. 0 not checked. [2018-11-18 12:26:31,974 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:26:31,974 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 53 [2018-11-18 12:26:31,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-11-18 12:26:31,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-11-18 12:26:31,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=2645, Unknown=0, NotChecked=0, Total=2756 [2018-11-18 12:26:31,975 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 53 states. [2018-11-18 12:26:33,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:26:33,810 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2018-11-18 12:26:33,811 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-11-18 12:26:33,811 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 133 [2018-11-18 12:26:33,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:26:33,811 INFO L225 Difference]: With dead ends: 82 [2018-11-18 12:26:33,811 INFO L226 Difference]: Without dead ends: 78 [2018-11-18 12:26:33,813 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 128 SyntacticMatches, 21 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=484, Invalid=8446, Unknown=0, NotChecked=0, Total=8930 [2018-11-18 12:26:33,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-11-18 12:26:33,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-11-18 12:26:33,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-11-18 12:26:33,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2018-11-18 12:26:33,816 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 133 [2018-11-18 12:26:33,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:26:33,816 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2018-11-18 12:26:33,816 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-11-18 12:26:33,816 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2018-11-18 12:26:33,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2018-11-18 12:26:33,817 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:26:33,817 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:26:33,817 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:26:33,817 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:26:33,818 INFO L82 PathProgramCache]: Analyzing trace with hash 1648275844, now seen corresponding path program 21 times [2018-11-18 12:26:33,818 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:26:33,818 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:26:33,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:26:33,818 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 12:26:33,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:26:33,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:26:34,012 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 672 proven. 41 refuted. 0 times theorem prover too weak. 631 trivial. 0 not checked. [2018-11-18 12:26:34,012 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:26:34,012 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6083610d-c351-4331-8d4e-9a14015649ca/bin-2019/uautomizer/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 12:26:34,018 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 12:26:34,074 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-11-18 12:26:34,074 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:26:34,077 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:26:34,100 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 672 proven. 41 refuted. 0 times theorem prover too weak. 631 trivial. 0 not checked. [2018-11-18 12:26:34,116 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:26:34,116 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-11-18 12:26:34,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-11-18 12:26:34,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-11-18 12:26:34,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=343, Unknown=0, NotChecked=0, Total=600 [2018-11-18 12:26:34,117 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 25 states. [2018-11-18 12:26:34,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:26:34,269 INFO L93 Difference]: Finished difference Result 78 states and 79 transitions. [2018-11-18 12:26:34,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-11-18 12:26:34,270 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 139 [2018-11-18 12:26:34,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:26:34,270 INFO L225 Difference]: With dead ends: 78 [2018-11-18 12:26:34,270 INFO L226 Difference]: Without dead ends: 0 [2018-11-18 12:26:34,271 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=761, Invalid=1309, Unknown=0, NotChecked=0, Total=2070 [2018-11-18 12:26:34,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-18 12:26:34,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-18 12:26:34,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-18 12:26:34,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-18 12:26:34,272 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 139 [2018-11-18 12:26:34,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:26:34,272 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-18 12:26:34,272 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-11-18 12:26:34,272 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-18 12:26:34,272 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-18 12:26:34,276 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-18 12:26:34,304 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-18 12:26:34,304 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-18 12:26:34,304 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-18 12:26:34,304 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-18 12:26:34,304 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-18 12:26:34,305 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-18 12:26:34,305 INFO L425 ceAbstractionStarter]: For program point sumEXIT(lines 3 9) no Hoare annotation was computed. [2018-11-18 12:26:34,305 INFO L421 ceAbstractionStarter]: At program point L7(line 7) the Hoare annotation is: (and (<= |sum_#in~m| sum_~m) (<= sum_~m |sum_#in~m|) (<= sum_~n |sum_#in~n|) (< 0 sum_~n) (<= |sum_#in~n| sum_~n)) [2018-11-18 12:26:34,305 INFO L425 ceAbstractionStarter]: For program point L7-1(line 7) no Hoare annotation was computed. [2018-11-18 12:26:34,305 INFO L425 ceAbstractionStarter]: For program point L4(lines 4 8) no Hoare annotation was computed. [2018-11-18 12:26:34,305 INFO L425 ceAbstractionStarter]: For program point sumFINAL(lines 3 9) no Hoare annotation was computed. [2018-11-18 12:26:34,305 INFO L428 ceAbstractionStarter]: At program point sumENTRY(lines 3 9) the Hoare annotation is: true [2018-11-18 12:26:34,305 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 11 18) the Hoare annotation is: true [2018-11-18 12:26:34,305 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 11 18) no Hoare annotation was computed. [2018-11-18 12:26:34,305 INFO L425 ceAbstractionStarter]: For program point L16(line 16) no Hoare annotation was computed. [2018-11-18 12:26:34,305 INFO L425 ceAbstractionStarter]: For program point L15(lines 15 17) no Hoare annotation was computed. [2018-11-18 12:26:34,305 INFO L421 ceAbstractionStarter]: At program point L14(line 14) the Hoare annotation is: (and (<= main_~a~0 20) (<= 20 main_~a~0)) [2018-11-18 12:26:34,305 INFO L425 ceAbstractionStarter]: For program point L14-1(line 14) no Hoare annotation was computed. [2018-11-18 12:26:34,306 INFO L425 ceAbstractionStarter]: For program point L15-2(lines 11 18) no Hoare annotation was computed. [2018-11-18 12:26:34,306 INFO L425 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2018-11-18 12:26:34,308 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.11 12:26:34 BoogieIcfgContainer [2018-11-18 12:26:34,308 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-18 12:26:34,308 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-18 12:26:34,308 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-18 12:26:34,308 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-18 12:26:34,309 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 12:26:24" (3/4) ... [2018-11-18 12:26:34,313 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-18 12:26:34,318 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-18 12:26:34,319 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure sum [2018-11-18 12:26:34,319 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-18 12:26:34,322 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-11-18 12:26:34,322 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2018-11-18 12:26:34,322 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-18 12:26:34,344 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_6083610d-c351-4331-8d4e-9a14015649ca/bin-2019/uautomizer/witness.graphml [2018-11-18 12:26:34,344 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-18 12:26:34,345 INFO L168 Benchmark]: Toolchain (without parser) took 10429.65 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 289.4 MB). Free memory was 958.2 MB in the beginning and 907.7 MB in the end (delta: 50.5 MB). Peak memory consumption was 339.9 MB. Max. memory is 11.5 GB. [2018-11-18 12:26:34,346 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 12:26:34,346 INFO L168 Benchmark]: CACSL2BoogieTranslator took 142.85 ms. Allocated memory is still 1.0 GB. Free memory was 958.2 MB in the beginning and 947.4 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-18 12:26:34,346 INFO L168 Benchmark]: Boogie Preprocessor took 20.74 ms. Allocated memory is still 1.0 GB. Free memory was 947.4 MB in the beginning and 944.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-18 12:26:34,346 INFO L168 Benchmark]: RCFGBuilder took 166.45 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 149.4 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -193.4 MB). Peak memory consumption was 14.1 MB. Max. memory is 11.5 GB. [2018-11-18 12:26:34,347 INFO L168 Benchmark]: TraceAbstraction took 10060.75 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 140.0 MB). Free memory was 1.1 GB in the beginning and 907.9 MB in the end (delta: 227.5 MB). Peak memory consumption was 367.5 MB. Max. memory is 11.5 GB. [2018-11-18 12:26:34,347 INFO L168 Benchmark]: Witness Printer took 36.33 ms. Allocated memory is still 1.3 GB. Free memory was 907.9 MB in the beginning and 907.7 MB in the end (delta: 214.9 kB). Peak memory consumption was 214.9 kB. Max. memory is 11.5 GB. [2018-11-18 12:26:34,349 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 142.85 ms. Allocated memory is still 1.0 GB. Free memory was 958.2 MB in the beginning and 947.4 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 20.74 ms. Allocated memory is still 1.0 GB. Free memory was 947.4 MB in the beginning and 944.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 166.45 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 149.4 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -193.4 MB). Peak memory consumption was 14.1 MB. Max. memory is 11.5 GB. * TraceAbstraction took 10060.75 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 140.0 MB). Free memory was 1.1 GB in the beginning and 907.9 MB in the end (delta: 227.5 MB). Peak memory consumption was 367.5 MB. Max. memory is 11.5 GB. * Witness Printer took 36.33 ms. Allocated memory is still 1.3 GB. Free memory was 907.9 MB in the beginning and 907.7 MB in the end (delta: 214.9 kB). Peak memory consumption was 214.9 kB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. SAFE Result, 10.0s OverallTime, 22 OverallIterations, 22 TraceHistogramMax, 4.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 324 SDtfs, 576 SDslu, 3156 SDs, 0 SdLazy, 3698 SolverSat, 112 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2525 GetRequests, 1907 SyntacticMatches, 21 SemanticMatches, 597 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2432 ImplicationChecksByTransitivity, 5.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=78occurred in iteration=21, 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, 22 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 9 PreInvPairs, 9 NumberOfFragments, 28 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 3 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 3.9s InterpolantComputationTime, 3331 NumberOfCodeBlocks, 3331 NumberOfCodeBlocksAsserted, 167 NumberOfCheckSat, 3288 ConstructedInterpolants, 0 QuantifiedInterpolants, 971208 SizeOfPredicates, 276 NumberOfNonLiveVariables, 4914 ConjunctsInSsa, 677 ConjunctsInUnsatCore, 43 InterpolantComputations, 1 PerfectInterpolantSequences, 11387/20328 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...