./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-lit/gj2007_true-unreach-call.c.i.p+lhb-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0cd3be1d Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_395668a8-7bae-439b-b95c-847034e99bff/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_395668a8-7bae-439b-b95c-847034e99bff/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_395668a8-7bae-439b-b95c-847034e99bff/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_395668a8-7bae-439b-b95c-847034e99bff/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-lit/gj2007_true-unreach-call.c.i.p+lhb-reducer.c -s /tmp/vcloud-vcloud-master/worker/working_dir_395668a8-7bae-439b-b95c-847034e99bff/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_395668a8-7bae-439b-b95c-847034e99bff/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 17da727b994aaa75d870178ca09f053b93a70f18 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-0cd3be1 [2018-11-28 13:27:01,335 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-28 13:27:01,336 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-28 13:27:01,344 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-28 13:27:01,344 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-28 13:27:01,345 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-28 13:27:01,346 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-28 13:27:01,347 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-28 13:27:01,348 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-28 13:27:01,349 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-28 13:27:01,349 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-28 13:27:01,350 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-28 13:27:01,350 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-28 13:27:01,351 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-28 13:27:01,352 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-28 13:27:01,352 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-28 13:27:01,353 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-28 13:27:01,354 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-28 13:27:01,355 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-28 13:27:01,356 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-28 13:27:01,357 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-28 13:27:01,358 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-28 13:27:01,360 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-28 13:27:01,360 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-28 13:27:01,360 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-28 13:27:01,361 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-28 13:27:01,361 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-28 13:27:01,362 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-28 13:27:01,363 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-28 13:27:01,363 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-28 13:27:01,364 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-28 13:27:01,364 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-28 13:27:01,364 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-28 13:27:01,364 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-28 13:27:01,365 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-28 13:27:01,365 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-28 13:27:01,366 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_395668a8-7bae-439b-b95c-847034e99bff/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-11-28 13:27:01,376 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-28 13:27:01,376 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-28 13:27:01,376 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-28 13:27:01,377 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-11-28 13:27:01,377 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-28 13:27:01,377 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-28 13:27:01,377 INFO L133 SettingsManager]: * Use SBE=true [2018-11-28 13:27:01,378 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-28 13:27:01,378 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-28 13:27:01,378 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-28 13:27:01,378 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-28 13:27:01,378 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-28 13:27:01,378 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-28 13:27:01,378 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-28 13:27:01,379 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-28 13:27:01,379 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-28 13:27:01,379 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-28 13:27:01,379 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-28 13:27:01,379 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-28 13:27:01,379 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-28 13:27:01,379 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-28 13:27:01,380 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-28 13:27:01,380 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-28 13:27:01,380 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-28 13:27:01,380 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-28 13:27:01,380 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-28 13:27:01,380 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-28 13:27:01,380 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-28 13:27:01,381 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-28 13:27:01,381 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-28 13:27:01,381 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_395668a8-7bae-439b-b95c-847034e99bff/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 -> 17da727b994aaa75d870178ca09f053b93a70f18 [2018-11-28 13:27:01,404 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-28 13:27:01,413 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-28 13:27:01,415 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-28 13:27:01,417 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-28 13:27:01,417 INFO L276 PluginConnector]: CDTParser initialized [2018-11-28 13:27:01,417 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_395668a8-7bae-439b-b95c-847034e99bff/bin-2019/uautomizer/../../sv-benchmarks/c/loop-lit/gj2007_true-unreach-call.c.i.p+lhb-reducer.c [2018-11-28 13:27:01,462 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_395668a8-7bae-439b-b95c-847034e99bff/bin-2019/uautomizer/data/3d781a95d/193baf46dc1843f897fdc69da2056c53/FLAG1a284a353 [2018-11-28 13:27:01,778 INFO L307 CDTParser]: Found 1 translation units. [2018-11-28 13:27:01,778 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_395668a8-7bae-439b-b95c-847034e99bff/sv-benchmarks/c/loop-lit/gj2007_true-unreach-call.c.i.p+lhb-reducer.c [2018-11-28 13:27:01,784 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_395668a8-7bae-439b-b95c-847034e99bff/bin-2019/uautomizer/data/3d781a95d/193baf46dc1843f897fdc69da2056c53/FLAG1a284a353 [2018-11-28 13:27:01,794 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_395668a8-7bae-439b-b95c-847034e99bff/bin-2019/uautomizer/data/3d781a95d/193baf46dc1843f897fdc69da2056c53 [2018-11-28 13:27:01,797 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-28 13:27:01,798 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-28 13:27:01,799 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-28 13:27:01,799 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-28 13:27:01,801 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-28 13:27:01,801 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 01:27:01" (1/1) ... [2018-11-28 13:27:01,803 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10faa8f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:27:01, skipping insertion in model container [2018-11-28 13:27:01,804 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 01:27:01" (1/1) ... [2018-11-28 13:27:01,808 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-28 13:27:01,821 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-28 13:27:01,915 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 13:27:01,918 INFO L191 MainTranslator]: Completed pre-run [2018-11-28 13:27:01,936 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 13:27:01,946 INFO L195 MainTranslator]: Completed translation [2018-11-28 13:27:01,946 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:27:01 WrapperNode [2018-11-28 13:27:01,946 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-28 13:27:01,947 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-28 13:27:01,947 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-28 13:27:01,947 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-28 13:27:01,952 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:27:01" (1/1) ... [2018-11-28 13:27:01,956 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:27:01" (1/1) ... [2018-11-28 13:27:01,961 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-28 13:27:01,961 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-28 13:27:01,961 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-28 13:27:01,961 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-28 13:27:01,967 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:27:01" (1/1) ... [2018-11-28 13:27:01,967 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:27:01" (1/1) ... [2018-11-28 13:27:01,967 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:27:01" (1/1) ... [2018-11-28 13:27:01,968 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:27:01" (1/1) ... [2018-11-28 13:27:01,971 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:27:01" (1/1) ... [2018-11-28 13:27:01,974 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:27:01" (1/1) ... [2018-11-28 13:27:01,975 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:27:01" (1/1) ... [2018-11-28 13:27:01,977 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-28 13:27:01,977 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-28 13:27:01,977 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-28 13:27:01,977 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-28 13:27:01,978 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:27:01" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_395668a8-7bae-439b-b95c-847034e99bff/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 [2018-11-28 13:27:02,057 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-28 13:27:02,058 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-28 13:27:02,058 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-28 13:27:02,058 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-28 13:27:02,058 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-28 13:27:02,058 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-28 13:27:02,219 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-28 13:27:02,219 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-11-28 13:27:02,219 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 01:27:02 BoogieIcfgContainer [2018-11-28 13:27:02,219 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-28 13:27:02,220 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-28 13:27:02,220 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-28 13:27:02,222 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-28 13:27:02,222 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 01:27:01" (1/3) ... [2018-11-28 13:27:02,223 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@242365d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 01:27:02, skipping insertion in model container [2018-11-28 13:27:02,223 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:27:01" (2/3) ... [2018-11-28 13:27:02,223 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@242365d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 01:27:02, skipping insertion in model container [2018-11-28 13:27:02,223 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 01:27:02" (3/3) ... [2018-11-28 13:27:02,225 INFO L112 eAbstractionObserver]: Analyzing ICFG gj2007_true-unreach-call.c.i.p+lhb-reducer.c [2018-11-28 13:27:02,231 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-28 13:27:02,236 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-28 13:27:02,251 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-28 13:27:02,276 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-28 13:27:02,277 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-28 13:27:02,277 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-28 13:27:02,277 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-28 13:27:02,277 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-28 13:27:02,277 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-28 13:27:02,277 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-28 13:27:02,277 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-28 13:27:02,277 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-28 13:27:02,293 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2018-11-28 13:27:02,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-11-28 13:27:02,298 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:27:02,299 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:27:02,300 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:27:02,305 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:27:02,305 INFO L82 PathProgramCache]: Analyzing trace with hash -535062244, now seen corresponding path program 1 times [2018-11-28 13:27:02,307 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:27:02,307 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:27:02,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:02,348 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:27:02,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:02,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:27:02,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 13:27:02,429 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 13:27:02,429 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-28 13:27:02,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-28 13:27:02,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-28 13:27:02,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-28 13:27:02,443 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 3 states. [2018-11-28 13:27:02,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:27:02,642 INFO L93 Difference]: Finished difference Result 74 states and 128 transitions. [2018-11-28 13:27:02,642 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-28 13:27:02,643 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2018-11-28 13:27:02,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:27:02,651 INFO L225 Difference]: With dead ends: 74 [2018-11-28 13:27:02,652 INFO L226 Difference]: Without dead ends: 47 [2018-11-28 13:27:02,654 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-28 13:27:02,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-11-28 13:27:02,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-11-28 13:27:02,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-11-28 13:27:02,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 58 transitions. [2018-11-28 13:27:02,681 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 58 transitions. Word has length 27 [2018-11-28 13:27:02,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:27:02,681 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 58 transitions. [2018-11-28 13:27:02,681 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-28 13:27:02,681 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 58 transitions. [2018-11-28 13:27:02,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-11-28 13:27:02,682 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:27:02,682 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:27:02,682 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:27:02,683 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:27:02,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1447563500, now seen corresponding path program 1 times [2018-11-28 13:27:02,683 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:27:02,683 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:27:02,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:02,684 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:27:02,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:02,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:27:02,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 13:27:02,737 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 13:27:02,737 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-28 13:27:02,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-28 13:27:02,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-28 13:27:02,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-11-28 13:27:02,739 INFO L87 Difference]: Start difference. First operand 47 states and 58 transitions. Second operand 5 states. [2018-11-28 13:27:02,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:27:02,796 INFO L93 Difference]: Finished difference Result 62 states and 73 transitions. [2018-11-28 13:27:02,796 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-28 13:27:02,796 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2018-11-28 13:27:02,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:27:02,797 INFO L225 Difference]: With dead ends: 62 [2018-11-28 13:27:02,797 INFO L226 Difference]: Without dead ends: 41 [2018-11-28 13:27:02,798 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-11-28 13:27:02,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-11-28 13:27:02,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-11-28 13:27:02,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-11-28 13:27:02,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2018-11-28 13:27:02,803 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 27 [2018-11-28 13:27:02,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:27:02,803 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2018-11-28 13:27:02,804 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-28 13:27:02,804 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2018-11-28 13:27:02,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-11-28 13:27:02,804 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:27:02,804 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:27:02,805 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:27:02,805 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:27:02,805 INFO L82 PathProgramCache]: Analyzing trace with hash -646102720, now seen corresponding path program 1 times [2018-11-28 13:27:02,805 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:27:02,805 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:27:02,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:02,806 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:27:02,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:02,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:27:02,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 13:27:02,873 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 13:27:02,873 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-11-28 13:27:02,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-28 13:27:02,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-28 13:27:02,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-11-28 13:27:02,874 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand 7 states. [2018-11-28 13:27:02,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:27:02,940 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2018-11-28 13:27:02,940 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-28 13:27:02,941 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2018-11-28 13:27:02,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:27:02,941 INFO L225 Difference]: With dead ends: 52 [2018-11-28 13:27:02,941 INFO L226 Difference]: Without dead ends: 37 [2018-11-28 13:27:02,942 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-11-28 13:27:02,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-11-28 13:27:02,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-11-28 13:27:02,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-11-28 13:27:02,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2018-11-28 13:27:02,946 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 27 [2018-11-28 13:27:02,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:27:02,947 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2018-11-28 13:27:02,947 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-28 13:27:02,947 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2018-11-28 13:27:02,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-11-28 13:27:02,948 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:27:02,948 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:27:02,948 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:27:02,948 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:27:02,949 INFO L82 PathProgramCache]: Analyzing trace with hash 2117052275, now seen corresponding path program 1 times [2018-11-28 13:27:02,949 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:27:02,949 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:27:02,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:02,950 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:27:02,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:02,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:27:03,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 13:27:03,022 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 13:27:03,022 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2018-11-28 13:27:03,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-28 13:27:03,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-28 13:27:03,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-11-28 13:27:03,023 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand 10 states. [2018-11-28 13:27:03,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:27:03,081 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2018-11-28 13:27:03,081 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-28 13:27:03,081 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2018-11-28 13:27:03,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:27:03,082 INFO L225 Difference]: With dead ends: 42 [2018-11-28 13:27:03,082 INFO L226 Difference]: Without dead ends: 31 [2018-11-28 13:27:03,083 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-11-28 13:27:03,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-11-28 13:27:03,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-11-28 13:27:03,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-11-28 13:27:03,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2018-11-28 13:27:03,086 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 27 [2018-11-28 13:27:03,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:27:03,086 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2018-11-28 13:27:03,086 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-28 13:27:03,086 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2018-11-28 13:27:03,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-11-28 13:27:03,087 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:27:03,087 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:27:03,087 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:27:03,087 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:27:03,087 INFO L82 PathProgramCache]: Analyzing trace with hash 1286240867, now seen corresponding path program 1 times [2018-11-28 13:27:03,087 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:27:03,088 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:27:03,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:03,088 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:27:03,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:03,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:27:03,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 13:27:03,124 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 13:27:03,124 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-28 13:27:03,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-28 13:27:03,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-28 13:27:03,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-28 13:27:03,124 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 3 states. [2018-11-28 13:27:03,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:27:03,165 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2018-11-28 13:27:03,167 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-28 13:27:03,167 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2018-11-28 13:27:03,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:27:03,167 INFO L225 Difference]: With dead ends: 34 [2018-11-28 13:27:03,168 INFO L226 Difference]: Without dead ends: 31 [2018-11-28 13:27:03,168 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-28 13:27:03,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-11-28 13:27:03,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-11-28 13:27:03,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-11-28 13:27:03,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2018-11-28 13:27:03,171 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 27 [2018-11-28 13:27:03,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:27:03,172 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2018-11-28 13:27:03,172 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-28 13:27:03,172 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2018-11-28 13:27:03,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-11-28 13:27:03,172 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:27:03,172 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:27:03,173 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:27:03,173 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:27:03,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1286806896, now seen corresponding path program 1 times [2018-11-28 13:27:03,173 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:27:03,173 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:27:03,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:03,175 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:27:03,175 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:03,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:27:03,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 13:27:03,246 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 13:27:03,247 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2018-11-28 13:27:03,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-28 13:27:03,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-28 13:27:03,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-11-28 13:27:03,247 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 11 states. [2018-11-28 13:27:03,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:27:03,297 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2018-11-28 13:27:03,297 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-28 13:27:03,297 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2018-11-28 13:27:03,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:27:03,297 INFO L225 Difference]: With dead ends: 36 [2018-11-28 13:27:03,298 INFO L226 Difference]: Without dead ends: 31 [2018-11-28 13:27:03,298 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-11-28 13:27:03,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-11-28 13:27:03,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-11-28 13:27:03,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-11-28 13:27:03,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2018-11-28 13:27:03,302 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 27 [2018-11-28 13:27:03,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:27:03,302 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2018-11-28 13:27:03,302 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-28 13:27:03,302 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2018-11-28 13:27:03,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-11-28 13:27:03,303 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:27:03,303 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:27:03,303 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:27:03,303 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:27:03,304 INFO L82 PathProgramCache]: Analyzing trace with hash -880646403, now seen corresponding path program 1 times [2018-11-28 13:27:03,304 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:27:03,304 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:27:03,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:03,305 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:27:03,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:03,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:27:03,403 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 13:27:03,403 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 13:27:03,403 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2018-11-28 13:27:03,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-28 13:27:03,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-28 13:27:03,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-11-28 13:27:03,404 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 12 states. [2018-11-28 13:27:03,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:27:03,465 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2018-11-28 13:27:03,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-28 13:27:03,470 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 29 [2018-11-28 13:27:03,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:27:03,470 INFO L225 Difference]: With dead ends: 38 [2018-11-28 13:27:03,470 INFO L226 Difference]: Without dead ends: 33 [2018-11-28 13:27:03,471 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-11-28 13:27:03,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-11-28 13:27:03,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-11-28 13:27:03,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-11-28 13:27:03,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-11-28 13:27:03,475 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 29 [2018-11-28 13:27:03,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:27:03,475 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-11-28 13:27:03,475 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-28 13:27:03,475 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-11-28 13:27:03,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-11-28 13:27:03,476 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:27:03,476 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:27:03,476 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:27:03,476 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:27:03,476 INFO L82 PathProgramCache]: Analyzing trace with hash -286061766, now seen corresponding path program 1 times [2018-11-28 13:27:03,477 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:27:03,477 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:27:03,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:03,477 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:27:03,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:03,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:27:03,548 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 13:27:03,548 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:27:03,548 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_395668a8-7bae-439b-b95c-847034e99bff/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 [2018-11-28 13:27:03,559 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:27:03,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:27:03,578 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:27:03,596 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 13:27:03,610 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:27:03,610 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-11-28 13:27:03,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-28 13:27:03,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-28 13:27:03,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-11-28 13:27:03,611 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 13 states. [2018-11-28 13:27:03,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:27:03,670 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2018-11-28 13:27:03,671 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-28 13:27:03,671 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 31 [2018-11-28 13:27:03,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:27:03,671 INFO L225 Difference]: With dead ends: 40 [2018-11-28 13:27:03,671 INFO L226 Difference]: Without dead ends: 35 [2018-11-28 13:27:03,672 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-11-28 13:27:03,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-11-28 13:27:03,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-11-28 13:27:03,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-11-28 13:27:03,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2018-11-28 13:27:03,675 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 31 [2018-11-28 13:27:03,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:27:03,676 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2018-11-28 13:27:03,676 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-28 13:27:03,676 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2018-11-28 13:27:03,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-11-28 13:27:03,677 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:27:03,677 INFO L402 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:27:03,677 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:27:03,677 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:27:03,677 INFO L82 PathProgramCache]: Analyzing trace with hash -120875977, now seen corresponding path program 2 times [2018-11-28 13:27:03,677 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:27:03,678 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:27:03,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:03,678 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:27:03,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:03,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:27:03,762 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 13:27:03,762 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:27:03,762 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_395668a8-7bae-439b-b95c-847034e99bff/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 [2018-11-28 13:27:03,768 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 13:27:03,778 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 13:27:03,779 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:27:03,780 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:27:03,788 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 13:27:03,804 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:27:03,804 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-11-28 13:27:03,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-28 13:27:03,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-28 13:27:03,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-11-28 13:27:03,805 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 14 states. [2018-11-28 13:27:03,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:27:03,860 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2018-11-28 13:27:03,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-28 13:27:03,860 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 33 [2018-11-28 13:27:03,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:27:03,861 INFO L225 Difference]: With dead ends: 42 [2018-11-28 13:27:03,861 INFO L226 Difference]: Without dead ends: 37 [2018-11-28 13:27:03,861 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-11-28 13:27:03,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-11-28 13:27:03,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-11-28 13:27:03,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-11-28 13:27:03,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2018-11-28 13:27:03,865 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 33 [2018-11-28 13:27:03,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:27:03,865 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2018-11-28 13:27:03,865 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-28 13:27:03,865 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2018-11-28 13:27:03,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-11-28 13:27:03,866 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:27:03,866 INFO L402 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:27:03,866 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:27:03,866 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:27:03,866 INFO L82 PathProgramCache]: Analyzing trace with hash -291122700, now seen corresponding path program 3 times [2018-11-28 13:27:03,866 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:27:03,866 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:27:03,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:03,867 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:27:03,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:03,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:27:03,967 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 13:27:03,967 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:27:03,967 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_395668a8-7bae-439b-b95c-847034e99bff/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 [2018-11-28 13:27:03,973 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 13:27:03,981 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-11-28 13:27:03,982 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:27:03,983 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:27:04,014 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-11-28 13:27:04,028 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:27:04,029 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 4] total 17 [2018-11-28 13:27:04,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-28 13:27:04,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-28 13:27:04,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-11-28 13:27:04,029 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 17 states. [2018-11-28 13:27:04,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:27:04,090 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2018-11-28 13:27:04,090 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-28 13:27:04,090 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 35 [2018-11-28 13:27:04,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:27:04,091 INFO L225 Difference]: With dead ends: 46 [2018-11-28 13:27:04,091 INFO L226 Difference]: Without dead ends: 41 [2018-11-28 13:27:04,091 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-11-28 13:27:04,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-11-28 13:27:04,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2018-11-28 13:27:04,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-11-28 13:27:04,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2018-11-28 13:27:04,095 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 35 [2018-11-28 13:27:04,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:27:04,096 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2018-11-28 13:27:04,096 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-28 13:27:04,096 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2018-11-28 13:27:04,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-11-28 13:27:04,096 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:27:04,097 INFO L402 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:27:04,097 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:27:04,097 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:27:04,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1159645813, now seen corresponding path program 4 times [2018-11-28 13:27:04,097 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:27:04,097 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:27:04,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:04,098 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:27:04,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:04,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:27:04,192 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-28 13:27:04,192 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:27:04,192 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_395668a8-7bae-439b-b95c-847034e99bff/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 [2018-11-28 13:27:04,198 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 13:27:04,207 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 13:27:04,207 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:27:04,209 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:27:04,215 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-28 13:27:04,240 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:27:04,240 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-11-28 13:27:04,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-28 13:27:04,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-28 13:27:04,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-11-28 13:27:04,241 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 16 states. [2018-11-28 13:27:04,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:27:04,335 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2018-11-28 13:27:04,335 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-28 13:27:04,335 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 39 [2018-11-28 13:27:04,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:27:04,336 INFO L225 Difference]: With dead ends: 48 [2018-11-28 13:27:04,336 INFO L226 Difference]: Without dead ends: 42 [2018-11-28 13:27:04,336 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-11-28 13:27:04,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-11-28 13:27:04,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-11-28 13:27:04,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-11-28 13:27:04,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2018-11-28 13:27:04,341 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 39 [2018-11-28 13:27:04,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:27:04,341 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2018-11-28 13:27:04,341 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-28 13:27:04,341 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2018-11-28 13:27:04,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-11-28 13:27:04,341 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:27:04,342 INFO L402 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:27:04,342 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:27:04,342 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:27:04,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1330868616, now seen corresponding path program 5 times [2018-11-28 13:27:04,342 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:27:04,342 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:27:04,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:04,343 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:27:04,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:04,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:27:04,437 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-28 13:27:04,437 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:27:04,437 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_395668a8-7bae-439b-b95c-847034e99bff/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 [2018-11-28 13:27:04,443 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-28 13:27:04,453 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-11-28 13:27:04,453 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:27:04,455 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:27:04,493 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-11-28 13:27:04,508 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:27:04,508 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 6] total 21 [2018-11-28 13:27:04,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-28 13:27:04,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-28 13:27:04,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-11-28 13:27:04,509 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 21 states. [2018-11-28 13:27:04,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:27:04,581 INFO L93 Difference]: Finished difference Result 55 states and 59 transitions. [2018-11-28 13:27:04,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-11-28 13:27:04,582 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 41 [2018-11-28 13:27:04,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:27:04,582 INFO L225 Difference]: With dead ends: 55 [2018-11-28 13:27:04,582 INFO L226 Difference]: Without dead ends: 49 [2018-11-28 13:27:04,582 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-11-28 13:27:04,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-11-28 13:27:04,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2018-11-28 13:27:04,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-11-28 13:27:04,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2018-11-28 13:27:04,586 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 41 [2018-11-28 13:27:04,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:27:04,586 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2018-11-28 13:27:04,586 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-28 13:27:04,586 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2018-11-28 13:27:04,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-11-28 13:27:04,587 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:27:04,587 INFO L402 BasicCegarLoop]: trace histogram [10, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:27:04,587 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:27:04,587 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:27:04,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1267923961, now seen corresponding path program 6 times [2018-11-28 13:27:04,588 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:27:04,588 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:27:04,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:04,588 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:27:04,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:04,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:27:04,690 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 49 proven. 42 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-11-28 13:27:04,691 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:27:04,691 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_395668a8-7bae-439b-b95c-847034e99bff/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 [2018-11-28 13:27:04,696 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-28 13:27:04,707 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-11-28 13:27:04,707 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:27:04,709 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:27:04,719 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 49 proven. 42 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-11-28 13:27:04,733 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:27:04,733 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-11-28 13:27:04,733 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-28 13:27:04,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-28 13:27:04,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-11-28 13:27:04,734 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 18 states. [2018-11-28 13:27:04,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:27:04,791 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2018-11-28 13:27:04,793 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-11-28 13:27:04,793 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 47 [2018-11-28 13:27:04,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:27:04,793 INFO L225 Difference]: With dead ends: 60 [2018-11-28 13:27:04,794 INFO L226 Difference]: Without dead ends: 50 [2018-11-28 13:27:04,794 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-11-28 13:27:04,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-11-28 13:27:04,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-11-28 13:27:04,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-11-28 13:27:04,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2018-11-28 13:27:04,798 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 47 [2018-11-28 13:27:04,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:27:04,798 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2018-11-28 13:27:04,798 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-28 13:27:04,798 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2018-11-28 13:27:04,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-11-28 13:27:04,799 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:27:04,799 INFO L402 BasicCegarLoop]: trace histogram [11, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:27:04,799 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:27:04,799 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:27:04,799 INFO L82 PathProgramCache]: Analyzing trace with hash -1690572042, now seen corresponding path program 7 times [2018-11-28 13:27:04,799 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:27:04,799 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:27:04,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:04,800 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:27:04,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:04,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:27:04,921 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 56 proven. 56 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-11-28 13:27:04,921 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:27:04,921 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_395668a8-7bae-439b-b95c-847034e99bff/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 [2018-11-28 13:27:04,932 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:27:04,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:27:04,952 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:27:04,959 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 56 proven. 56 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-11-28 13:27:04,975 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:27:04,975 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-11-28 13:27:04,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-11-28 13:27:04,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-11-28 13:27:04,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-11-28 13:27:04,976 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 19 states. [2018-11-28 13:27:05,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:27:05,037 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2018-11-28 13:27:05,037 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-28 13:27:05,037 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 49 [2018-11-28 13:27:05,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:27:05,038 INFO L225 Difference]: With dead ends: 62 [2018-11-28 13:27:05,038 INFO L226 Difference]: Without dead ends: 52 [2018-11-28 13:27:05,038 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-11-28 13:27:05,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-11-28 13:27:05,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-11-28 13:27:05,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-11-28 13:27:05,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2018-11-28 13:27:05,041 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 49 [2018-11-28 13:27:05,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:27:05,041 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2018-11-28 13:27:05,041 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-11-28 13:27:05,041 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2018-11-28 13:27:05,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-11-28 13:27:05,042 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:27:05,042 INFO L402 BasicCegarLoop]: trace histogram [12, 8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:27:05,042 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:27:05,042 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:27:05,043 INFO L82 PathProgramCache]: Analyzing trace with hash -1536880973, now seen corresponding path program 8 times [2018-11-28 13:27:05,043 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:27:05,043 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:27:05,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:05,043 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:27:05,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:05,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:27:05,171 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 63 proven. 72 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-11-28 13:27:05,171 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:27:05,171 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_395668a8-7bae-439b-b95c-847034e99bff/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 [2018-11-28 13:27:05,180 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 13:27:05,194 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 13:27:05,194 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:27:05,196 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:27:05,299 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 75 proven. 49 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-11-28 13:27:05,313 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:27:05,313 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 10] total 28 [2018-11-28 13:27:05,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-11-28 13:27:05,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-11-28 13:27:05,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-11-28 13:27:05,314 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand 28 states. [2018-11-28 13:27:05,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:27:05,418 INFO L93 Difference]: Finished difference Result 73 states and 79 transitions. [2018-11-28 13:27:05,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-11-28 13:27:05,419 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 51 [2018-11-28 13:27:05,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:27:05,419 INFO L225 Difference]: With dead ends: 73 [2018-11-28 13:27:05,420 INFO L226 Difference]: Without dead ends: 63 [2018-11-28 13:27:05,420 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-11-28 13:27:05,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-11-28 13:27:05,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2018-11-28 13:27:05,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-11-28 13:27:05,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2018-11-28 13:27:05,424 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 51 [2018-11-28 13:27:05,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:27:05,425 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2018-11-28 13:27:05,425 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-11-28 13:27:05,425 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2018-11-28 13:27:05,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-11-28 13:27:05,425 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:27:05,426 INFO L402 BasicCegarLoop]: trace histogram [17, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:27:05,426 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:27:05,426 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:27:05,426 INFO L82 PathProgramCache]: Analyzing trace with hash -2034313832, now seen corresponding path program 9 times [2018-11-28 13:27:05,426 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:27:05,426 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:27:05,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:05,427 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:27:05,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:05,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:27:05,614 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 150 proven. 90 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2018-11-28 13:27:05,614 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:27:05,614 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_395668a8-7bae-439b-b95c-847034e99bff/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 [2018-11-28 13:27:05,623 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 13:27:05,648 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-11-28 13:27:05,648 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:27:05,652 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:27:06,182 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 13:27:06,197 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:27:06,197 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 28] total 47 [2018-11-28 13:27:06,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-11-28 13:27:06,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-11-28 13:27:06,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-11-28 13:27:06,198 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand 47 states. [2018-11-28 13:27:06,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:27:06,355 INFO L93 Difference]: Finished difference Result 119 states and 139 transitions. [2018-11-28 13:27:06,355 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-11-28 13:27:06,355 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 61 [2018-11-28 13:27:06,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:27:06,356 INFO L225 Difference]: With dead ends: 119 [2018-11-28 13:27:06,356 INFO L226 Difference]: Without dead ends: 101 [2018-11-28 13:27:06,357 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-11-28 13:27:06,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-11-28 13:27:06,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2018-11-28 13:27:06,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-11-28 13:27:06,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 101 transitions. [2018-11-28 13:27:06,364 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 101 transitions. Word has length 61 [2018-11-28 13:27:06,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:27:06,364 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 101 transitions. [2018-11-28 13:27:06,364 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-11-28 13:27:06,364 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 101 transitions. [2018-11-28 13:27:06,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-11-28 13:27:06,365 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:27:06,365 INFO L402 BasicCegarLoop]: trace histogram [36, 26, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:27:06,366 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:27:06,366 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:27:06,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1443054295, now seen corresponding path program 10 times [2018-11-28 13:27:06,366 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:27:06,366 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:27:06,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:06,367 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:27:06,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:06,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:27:06,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 561 proven. 110 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2018-11-28 13:27:06,527 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:27:06,527 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_395668a8-7bae-439b-b95c-847034e99bff/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 [2018-11-28 13:27:06,534 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 13:27:06,554 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 13:27:06,554 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:27:06,556 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:27:06,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 561 proven. 110 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2018-11-28 13:27:06,586 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:27:06,586 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-11-28 13:27:06,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-11-28 13:27:06,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-11-28 13:27:06,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-11-28 13:27:06,587 INFO L87 Difference]: Start difference. First operand 100 states and 101 transitions. Second operand 22 states. [2018-11-28 13:27:06,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:27:06,665 INFO L93 Difference]: Finished difference Result 156 states and 158 transitions. [2018-11-28 13:27:06,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-11-28 13:27:06,666 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 99 [2018-11-28 13:27:06,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:27:06,666 INFO L225 Difference]: With dead ends: 156 [2018-11-28 13:27:06,666 INFO L226 Difference]: Without dead ends: 102 [2018-11-28 13:27:06,667 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-11-28 13:27:06,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-11-28 13:27:06,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-11-28 13:27:06,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-11-28 13:27:06,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 103 transitions. [2018-11-28 13:27:06,672 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 103 transitions. Word has length 99 [2018-11-28 13:27:06,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:27:06,672 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 103 transitions. [2018-11-28 13:27:06,673 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-11-28 13:27:06,673 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 103 transitions. [2018-11-28 13:27:06,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-11-28 13:27:06,673 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:27:06,673 INFO L402 BasicCegarLoop]: trace histogram [37, 26, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:27:06,674 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:27:06,674 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:27:06,674 INFO L82 PathProgramCache]: Analyzing trace with hash 430708646, now seen corresponding path program 11 times [2018-11-28 13:27:06,674 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:27:06,674 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:27:06,675 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:06,675 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:27:06,675 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:06,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:27:06,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 612 proven. 132 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2018-11-28 13:27:06,836 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:27:06,836 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_395668a8-7bae-439b-b95c-847034e99bff/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 [2018-11-28 13:27:06,842 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-28 13:27:06,904 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 38 check-sat command(s) [2018-11-28 13:27:06,905 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:27:06,907 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:27:07,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 583 proven. 676 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2018-11-28 13:27:07,405 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:27:07,405 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 29] total 50 [2018-11-28 13:27:07,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-11-28 13:27:07,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-11-28 13:27:07,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-11-28 13:27:07,407 INFO L87 Difference]: Start difference. First operand 102 states and 103 transitions. Second operand 50 states. [2018-11-28 13:27:07,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:27:07,539 INFO L93 Difference]: Finished difference Result 161 states and 164 transitions. [2018-11-28 13:27:07,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-11-28 13:27:07,539 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 101 [2018-11-28 13:27:07,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:27:07,540 INFO L225 Difference]: With dead ends: 161 [2018-11-28 13:27:07,540 INFO L226 Difference]: Without dead ends: 107 [2018-11-28 13:27:07,541 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-11-28 13:27:07,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-11-28 13:27:07,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2018-11-28 13:27:07,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-11-28 13:27:07,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 107 transitions. [2018-11-28 13:27:07,546 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 107 transitions. Word has length 101 [2018-11-28 13:27:07,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:27:07,546 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 107 transitions. [2018-11-28 13:27:07,546 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-11-28 13:27:07,546 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 107 transitions. [2018-11-28 13:27:07,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-11-28 13:27:07,547 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:27:07,547 INFO L402 BasicCegarLoop]: trace histogram [39, 27, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:27:07,547 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:27:07,547 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:27:07,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1508217725, now seen corresponding path program 12 times [2018-11-28 13:27:07,547 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:27:07,548 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:27:07,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:07,548 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:27:07,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:07,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:27:07,722 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 689 proven. 156 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2018-11-28 13:27:07,722 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:27:07,722 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_395668a8-7bae-439b-b95c-847034e99bff/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 [2018-11-28 13:27:07,729 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-28 13:27:07,769 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 39 check-sat command(s) [2018-11-28 13:27:07,770 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:27:07,772 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:27:08,255 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 660 proven. 729 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2018-11-28 13:27:08,270 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:27:08,270 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 30] total 52 [2018-11-28 13:27:08,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-11-28 13:27:08,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-11-28 13:27:08,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-11-28 13:27:08,272 INFO L87 Difference]: Start difference. First operand 106 states and 107 transitions. Second operand 52 states. [2018-11-28 13:27:08,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:27:08,405 INFO L93 Difference]: Finished difference Result 167 states and 170 transitions. [2018-11-28 13:27:08,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-11-28 13:27:08,405 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 105 [2018-11-28 13:27:08,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:27:08,406 INFO L225 Difference]: With dead ends: 167 [2018-11-28 13:27:08,406 INFO L226 Difference]: Without dead ends: 111 [2018-11-28 13:27:08,407 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-11-28 13:27:08,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-11-28 13:27:08,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2018-11-28 13:27:08,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-11-28 13:27:08,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 111 transitions. [2018-11-28 13:27:08,410 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 111 transitions. Word has length 105 [2018-11-28 13:27:08,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:27:08,411 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 111 transitions. [2018-11-28 13:27:08,411 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-11-28 13:27:08,411 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 111 transitions. [2018-11-28 13:27:08,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-11-28 13:27:08,411 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:27:08,412 INFO L402 BasicCegarLoop]: trace histogram [41, 28, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:27:08,412 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:27:08,412 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:27:08,412 INFO L82 PathProgramCache]: Analyzing trace with hash 997928724, now seen corresponding path program 13 times [2018-11-28 13:27:08,412 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:27:08,412 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:27:08,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:08,413 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:27:08,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:08,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:27:08,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 770 proven. 182 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2018-11-28 13:27:08,579 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:27:08,579 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_395668a8-7bae-439b-b95c-847034e99bff/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 [2018-11-28 13:27:08,584 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:27:08,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:27:08,602 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:27:08,613 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 770 proven. 182 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2018-11-28 13:27:08,628 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:27:08,628 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-11-28 13:27:08,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-11-28 13:27:08,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-11-28 13:27:08,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-11-28 13:27:08,629 INFO L87 Difference]: Start difference. First operand 110 states and 111 transitions. Second operand 25 states. [2018-11-28 13:27:08,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:27:08,688 INFO L93 Difference]: Finished difference Result 170 states and 172 transitions. [2018-11-28 13:27:08,688 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-11-28 13:27:08,688 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 109 [2018-11-28 13:27:08,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:27:08,689 INFO L225 Difference]: With dead ends: 170 [2018-11-28 13:27:08,689 INFO L226 Difference]: Without dead ends: 112 [2018-11-28 13:27:08,690 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-11-28 13:27:08,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-11-28 13:27:08,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2018-11-28 13:27:08,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-11-28 13:27:08,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 113 transitions. [2018-11-28 13:27:08,694 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 113 transitions. Word has length 109 [2018-11-28 13:27:08,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:27:08,694 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 113 transitions. [2018-11-28 13:27:08,694 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-11-28 13:27:08,694 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 113 transitions. [2018-11-28 13:27:08,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-11-28 13:27:08,695 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:27:08,695 INFO L402 BasicCegarLoop]: trace histogram [42, 28, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:27:08,695 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:27:08,695 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:27:08,695 INFO L82 PathProgramCache]: Analyzing trace with hash 921522513, now seen corresponding path program 14 times [2018-11-28 13:27:08,695 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:27:08,696 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:27:08,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:08,696 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:27:08,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:08,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:27:08,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 825 proven. 210 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2018-11-28 13:27:08,938 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:27:08,938 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_395668a8-7bae-439b-b95c-847034e99bff/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 [2018-11-28 13:27:08,948 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 13:27:08,976 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 13:27:08,977 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:27:08,979 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:27:08,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 825 proven. 210 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2018-11-28 13:27:09,019 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:27:09,019 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-11-28 13:27:09,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-11-28 13:27:09,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-11-28 13:27:09,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-11-28 13:27:09,020 INFO L87 Difference]: Start difference. First operand 112 states and 113 transitions. Second operand 26 states. [2018-11-28 13:27:09,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:27:09,130 INFO L93 Difference]: Finished difference Result 172 states and 174 transitions. [2018-11-28 13:27:09,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-11-28 13:27:09,131 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 111 [2018-11-28 13:27:09,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:27:09,132 INFO L225 Difference]: With dead ends: 172 [2018-11-28 13:27:09,132 INFO L226 Difference]: Without dead ends: 114 [2018-11-28 13:27:09,132 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-11-28 13:27:09,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-11-28 13:27:09,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2018-11-28 13:27:09,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-11-28 13:27:09,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 115 transitions. [2018-11-28 13:27:09,139 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 115 transitions. Word has length 111 [2018-11-28 13:27:09,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:27:09,139 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 115 transitions. [2018-11-28 13:27:09,139 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-11-28 13:27:09,139 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 115 transitions. [2018-11-28 13:27:09,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-11-28 13:27:09,139 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:27:09,140 INFO L402 BasicCegarLoop]: trace histogram [43, 28, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:27:09,140 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:27:09,140 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:27:09,140 INFO L82 PathProgramCache]: Analyzing trace with hash 509597774, now seen corresponding path program 15 times [2018-11-28 13:27:09,140 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:27:09,140 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:27:09,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:09,141 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:27:09,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:09,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:27:09,379 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 880 proven. 240 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2018-11-28 13:27:09,379 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:27:09,379 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_395668a8-7bae-439b-b95c-847034e99bff/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 [2018-11-28 13:27:09,385 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 13:27:09,415 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-11-28 13:27:09,415 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:27:09,417 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:27:09,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 880 proven. 240 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2018-11-28 13:27:09,448 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:27:09,448 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-11-28 13:27:09,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-11-28 13:27:09,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-11-28 13:27:09,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-11-28 13:27:09,449 INFO L87 Difference]: Start difference. First operand 114 states and 115 transitions. Second operand 27 states. [2018-11-28 13:27:09,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:27:09,553 INFO L93 Difference]: Finished difference Result 174 states and 176 transitions. [2018-11-28 13:27:09,557 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-11-28 13:27:09,557 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 113 [2018-11-28 13:27:09,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:27:09,557 INFO L225 Difference]: With dead ends: 174 [2018-11-28 13:27:09,558 INFO L226 Difference]: Without dead ends: 116 [2018-11-28 13:27:09,558 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-11-28 13:27:09,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-11-28 13:27:09,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2018-11-28 13:27:09,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-11-28 13:27:09,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 117 transitions. [2018-11-28 13:27:09,565 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 117 transitions. Word has length 113 [2018-11-28 13:27:09,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:27:09,566 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 117 transitions. [2018-11-28 13:27:09,566 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-11-28 13:27:09,566 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 117 transitions. [2018-11-28 13:27:09,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-11-28 13:27:09,566 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:27:09,566 INFO L402 BasicCegarLoop]: trace histogram [44, 28, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:27:09,567 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:27:09,567 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:27:09,567 INFO L82 PathProgramCache]: Analyzing trace with hash -213085173, now seen corresponding path program 16 times [2018-11-28 13:27:09,567 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:27:09,567 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:27:09,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:09,568 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:27:09,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:09,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:27:09,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 935 proven. 272 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2018-11-28 13:27:09,818 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:27:09,818 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_395668a8-7bae-439b-b95c-847034e99bff/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 [2018-11-28 13:27:09,824 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 13:27:09,850 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 13:27:09,850 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:27:09,852 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:27:09,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 935 proven. 272 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2018-11-28 13:27:09,881 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:27:09,881 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-11-28 13:27:09,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-11-28 13:27:09,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-11-28 13:27:09,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-11-28 13:27:09,882 INFO L87 Difference]: Start difference. First operand 116 states and 117 transitions. Second operand 28 states. [2018-11-28 13:27:09,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:27:09,992 INFO L93 Difference]: Finished difference Result 176 states and 178 transitions. [2018-11-28 13:27:09,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-11-28 13:27:09,993 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 115 [2018-11-28 13:27:09,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:27:09,994 INFO L225 Difference]: With dead ends: 176 [2018-11-28 13:27:09,994 INFO L226 Difference]: Without dead ends: 118 [2018-11-28 13:27:09,994 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-11-28 13:27:09,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-11-28 13:27:09,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2018-11-28 13:27:10,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-11-28 13:27:10,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 119 transitions. [2018-11-28 13:27:10,002 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 119 transitions. Word has length 115 [2018-11-28 13:27:10,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:27:10,002 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 119 transitions. [2018-11-28 13:27:10,002 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-11-28 13:27:10,002 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 119 transitions. [2018-11-28 13:27:10,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-11-28 13:27:10,002 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:27:10,003 INFO L402 BasicCegarLoop]: trace histogram [45, 28, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:27:10,003 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:27:10,003 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:27:10,003 INFO L82 PathProgramCache]: Analyzing trace with hash 1073304712, now seen corresponding path program 17 times [2018-11-28 13:27:10,003 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:27:10,003 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:27:10,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:10,004 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:27:10,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:10,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:27:10,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 990 proven. 306 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2018-11-28 13:27:10,306 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:27:10,306 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_395668a8-7bae-439b-b95c-847034e99bff/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 [2018-11-28 13:27:10,312 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-28 13:27:10,354 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2018-11-28 13:27:10,354 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:27:10,356 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:27:10,961 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 969 proven. 784 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2018-11-28 13:27:10,981 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:27:10,982 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 31] total 58 [2018-11-28 13:27:10,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-11-28 13:27:10,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-11-28 13:27:10,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-11-28 13:27:10,983 INFO L87 Difference]: Start difference. First operand 118 states and 119 transitions. Second operand 58 states. [2018-11-28 13:27:11,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:27:11,124 INFO L93 Difference]: Finished difference Result 181 states and 184 transitions. [2018-11-28 13:27:11,124 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-11-28 13:27:11,124 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 117 [2018-11-28 13:27:11,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:27:11,124 INFO L225 Difference]: With dead ends: 181 [2018-11-28 13:27:11,124 INFO L226 Difference]: Without dead ends: 123 [2018-11-28 13:27:11,125 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-11-28 13:27:11,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-11-28 13:27:11,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2018-11-28 13:27:11,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-11-28 13:27:11,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 123 transitions. [2018-11-28 13:27:11,129 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 123 transitions. Word has length 117 [2018-11-28 13:27:11,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:27:11,129 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 123 transitions. [2018-11-28 13:27:11,129 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-11-28 13:27:11,129 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 123 transitions. [2018-11-28 13:27:11,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-11-28 13:27:11,130 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:27:11,130 INFO L402 BasicCegarLoop]: trace histogram [47, 29, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:27:11,130 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:27:11,131 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:27:11,131 INFO L82 PathProgramCache]: Analyzing trace with hash -709786145, now seen corresponding path program 18 times [2018-11-28 13:27:11,131 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:27:11,131 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:27:11,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:11,131 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:27:11,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:11,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:27:11,383 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 1083 proven. 342 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2018-11-28 13:27:11,383 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:27:11,384 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_395668a8-7bae-439b-b95c-847034e99bff/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 [2018-11-28 13:27:11,392 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-28 13:27:11,437 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 47 check-sat command(s) [2018-11-28 13:27:11,437 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:27:11,439 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:27:12,024 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 1062 proven. 841 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2018-11-28 13:27:12,039 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:27:12,039 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 32] total 60 [2018-11-28 13:27:12,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-11-28 13:27:12,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-11-28 13:27:12,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-11-28 13:27:12,041 INFO L87 Difference]: Start difference. First operand 122 states and 123 transitions. Second operand 60 states. [2018-11-28 13:27:12,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:27:12,176 INFO L93 Difference]: Finished difference Result 187 states and 190 transitions. [2018-11-28 13:27:12,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-11-28 13:27:12,176 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 121 [2018-11-28 13:27:12,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:27:12,177 INFO L225 Difference]: With dead ends: 187 [2018-11-28 13:27:12,177 INFO L226 Difference]: Without dead ends: 127 [2018-11-28 13:27:12,178 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-11-28 13:27:12,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-11-28 13:27:12,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 126. [2018-11-28 13:27:12,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2018-11-28 13:27:12,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 127 transitions. [2018-11-28 13:27:12,183 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 127 transitions. Word has length 121 [2018-11-28 13:27:12,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:27:12,184 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 127 transitions. [2018-11-28 13:27:12,184 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-11-28 13:27:12,184 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 127 transitions. [2018-11-28 13:27:12,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-11-28 13:27:12,184 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:27:12,185 INFO L402 BasicCegarLoop]: trace histogram [49, 30, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:27:12,185 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:27:12,185 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:27:12,185 INFO L82 PathProgramCache]: Analyzing trace with hash -934578442, now seen corresponding path program 19 times [2018-11-28 13:27:12,185 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:27:12,185 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:27:12,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:12,186 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:27:12,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:12,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:27:12,453 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 1180 proven. 380 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2018-11-28 13:27:12,453 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:27:12,453 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_395668a8-7bae-439b-b95c-847034e99bff/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 [2018-11-28 13:27:12,460 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:27:12,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:27:12,485 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:27:12,496 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 1180 proven. 380 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2018-11-28 13:27:12,511 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:27:12,511 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-11-28 13:27:12,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-11-28 13:27:12,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-11-28 13:27:12,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-11-28 13:27:12,512 INFO L87 Difference]: Start difference. First operand 126 states and 127 transitions. Second operand 31 states. [2018-11-28 13:27:12,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:27:12,580 INFO L93 Difference]: Finished difference Result 190 states and 192 transitions. [2018-11-28 13:27:12,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-11-28 13:27:12,580 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 125 [2018-11-28 13:27:12,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:27:12,581 INFO L225 Difference]: With dead ends: 190 [2018-11-28 13:27:12,581 INFO L226 Difference]: Without dead ends: 128 [2018-11-28 13:27:12,581 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-11-28 13:27:12,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-11-28 13:27:12,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2018-11-28 13:27:12,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2018-11-28 13:27:12,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 129 transitions. [2018-11-28 13:27:12,585 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 129 transitions. Word has length 125 [2018-11-28 13:27:12,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:27:12,585 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 129 transitions. [2018-11-28 13:27:12,585 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-11-28 13:27:12,585 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 129 transitions. [2018-11-28 13:27:12,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-11-28 13:27:12,585 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:27:12,586 INFO L402 BasicCegarLoop]: trace histogram [50, 30, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:27:12,586 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:27:12,586 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:27:12,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1739816755, now seen corresponding path program 20 times [2018-11-28 13:27:12,586 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:27:12,586 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:27:12,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:12,587 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:27:12,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:12,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:27:12,855 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 1239 proven. 420 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2018-11-28 13:27:12,855 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:27:12,855 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_395668a8-7bae-439b-b95c-847034e99bff/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 [2018-11-28 13:27:12,866 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 13:27:12,886 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 13:27:12,886 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:27:12,888 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:27:12,904 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 1239 proven. 420 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2018-11-28 13:27:12,920 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:27:12,920 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-11-28 13:27:12,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-11-28 13:27:12,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-11-28 13:27:12,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-11-28 13:27:12,921 INFO L87 Difference]: Start difference. First operand 128 states and 129 transitions. Second operand 32 states. [2018-11-28 13:27:13,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:27:13,081 INFO L93 Difference]: Finished difference Result 192 states and 194 transitions. [2018-11-28 13:27:13,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-11-28 13:27:13,082 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 127 [2018-11-28 13:27:13,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:27:13,082 INFO L225 Difference]: With dead ends: 192 [2018-11-28 13:27:13,083 INFO L226 Difference]: Without dead ends: 130 [2018-11-28 13:27:13,083 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-11-28 13:27:13,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-11-28 13:27:13,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2018-11-28 13:27:13,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-11-28 13:27:13,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 131 transitions. [2018-11-28 13:27:13,088 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 131 transitions. Word has length 127 [2018-11-28 13:27:13,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:27:13,088 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 131 transitions. [2018-11-28 13:27:13,088 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-11-28 13:27:13,088 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 131 transitions. [2018-11-28 13:27:13,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2018-11-28 13:27:13,089 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:27:13,089 INFO L402 BasicCegarLoop]: trace histogram [51, 30, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:27:13,089 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:27:13,089 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:27:13,089 INFO L82 PathProgramCache]: Analyzing trace with hash -851809232, now seen corresponding path program 21 times [2018-11-28 13:27:13,089 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:27:13,089 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:27:13,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:13,091 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:27:13,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:13,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:27:13,472 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 1298 proven. 462 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2018-11-28 13:27:13,472 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:27:13,472 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_395668a8-7bae-439b-b95c-847034e99bff/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 [2018-11-28 13:27:13,481 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 13:27:13,524 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2018-11-28 13:27:13,524 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:27:13,526 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:27:13,537 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 1298 proven. 462 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2018-11-28 13:27:13,552 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:27:13,552 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-11-28 13:27:13,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-11-28 13:27:13,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-11-28 13:27:13,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-11-28 13:27:13,553 INFO L87 Difference]: Start difference. First operand 130 states and 131 transitions. Second operand 33 states. [2018-11-28 13:27:13,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:27:13,629 INFO L93 Difference]: Finished difference Result 194 states and 196 transitions. [2018-11-28 13:27:13,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-11-28 13:27:13,629 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 129 [2018-11-28 13:27:13,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:27:13,630 INFO L225 Difference]: With dead ends: 194 [2018-11-28 13:27:13,630 INFO L226 Difference]: Without dead ends: 132 [2018-11-28 13:27:13,630 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-11-28 13:27:13,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2018-11-28 13:27:13,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2018-11-28 13:27:13,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2018-11-28 13:27:13,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 133 transitions. [2018-11-28 13:27:13,634 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 133 transitions. Word has length 129 [2018-11-28 13:27:13,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:27:13,635 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 133 transitions. [2018-11-28 13:27:13,635 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-11-28 13:27:13,635 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 133 transitions. [2018-11-28 13:27:13,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2018-11-28 13:27:13,635 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:27:13,635 INFO L402 BasicCegarLoop]: trace histogram [52, 30, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:27:13,635 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:27:13,635 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:27:13,636 INFO L82 PathProgramCache]: Analyzing trace with hash -323351059, now seen corresponding path program 22 times [2018-11-28 13:27:13,636 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:27:13,636 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:27:13,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:13,636 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:27:13,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:13,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:27:13,922 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 1357 proven. 506 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2018-11-28 13:27:13,923 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:27:13,923 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_395668a8-7bae-439b-b95c-847034e99bff/bin-2019/uautomizer/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 13:27:13,929 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 13:27:13,948 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 13:27:13,948 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:27:13,950 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:27:13,961 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 1357 proven. 506 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2018-11-28 13:27:13,976 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:27:13,976 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-11-28 13:27:13,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-11-28 13:27:13,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-11-28 13:27:13,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-11-28 13:27:13,977 INFO L87 Difference]: Start difference. First operand 132 states and 133 transitions. Second operand 34 states. [2018-11-28 13:27:14,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:27:14,058 INFO L93 Difference]: Finished difference Result 196 states and 198 transitions. [2018-11-28 13:27:14,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-11-28 13:27:14,059 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 131 [2018-11-28 13:27:14,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:27:14,059 INFO L225 Difference]: With dead ends: 196 [2018-11-28 13:27:14,059 INFO L226 Difference]: Without dead ends: 134 [2018-11-28 13:27:14,060 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-11-28 13:27:14,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-11-28 13:27:14,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2018-11-28 13:27:14,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2018-11-28 13:27:14,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 135 transitions. [2018-11-28 13:27:14,064 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 135 transitions. Word has length 131 [2018-11-28 13:27:14,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:27:14,064 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 135 transitions. [2018-11-28 13:27:14,065 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-11-28 13:27:14,065 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 135 transitions. [2018-11-28 13:27:14,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-11-28 13:27:14,065 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:27:14,065 INFO L402 BasicCegarLoop]: trace histogram [53, 30, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:27:14,065 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:27:14,066 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:27:14,066 INFO L82 PathProgramCache]: Analyzing trace with hash 718812266, now seen corresponding path program 23 times [2018-11-28 13:27:14,066 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:27:14,066 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:27:14,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:14,067 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:27:14,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:14,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:27:14,404 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 1416 proven. 552 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2018-11-28 13:27:14,404 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:27:14,404 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_395668a8-7bae-439b-b95c-847034e99bff/bin-2019/uautomizer/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 13:27:14,410 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-28 13:27:14,464 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2018-11-28 13:27:14,464 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:27:14,466 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:27:15,129 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 1403 proven. 900 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2018-11-28 13:27:15,144 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:27:15,144 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 33] total 66 [2018-11-28 13:27:15,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-11-28 13:27:15,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-11-28 13:27:15,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-11-28 13:27:15,146 INFO L87 Difference]: Start difference. First operand 134 states and 135 transitions. Second operand 66 states. [2018-11-28 13:27:15,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:27:15,321 INFO L93 Difference]: Finished difference Result 201 states and 204 transitions. [2018-11-28 13:27:15,322 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-11-28 13:27:15,322 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 133 [2018-11-28 13:27:15,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:27:15,323 INFO L225 Difference]: With dead ends: 201 [2018-11-28 13:27:15,323 INFO L226 Difference]: Without dead ends: 139 [2018-11-28 13:27:15,324 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-11-28 13:27:15,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-11-28 13:27:15,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 138. [2018-11-28 13:27:15,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2018-11-28 13:27:15,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 139 transitions. [2018-11-28 13:27:15,329 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 139 transitions. Word has length 133 [2018-11-28 13:27:15,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:27:15,329 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 139 transitions. [2018-11-28 13:27:15,329 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-11-28 13:27:15,329 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 139 transitions. [2018-11-28 13:27:15,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-11-28 13:27:15,330 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:27:15,330 INFO L402 BasicCegarLoop]: trace histogram [55, 31, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:27:15,330 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:27:15,330 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:27:15,330 INFO L82 PathProgramCache]: Analyzing trace with hash -223978687, now seen corresponding path program 24 times [2018-11-28 13:27:15,330 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:27:15,330 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:27:15,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:15,331 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:27:15,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:15,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:27:15,679 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 1525 proven. 600 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2018-11-28 13:27:15,680 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:27:15,680 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_395668a8-7bae-439b-b95c-847034e99bff/bin-2019/uautomizer/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 13:27:15,686 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-28 13:27:15,746 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-11-28 13:27:15,746 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:27:15,748 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:27:16,504 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 1512 proven. 961 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2018-11-28 13:27:16,519 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:27:16,519 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 34] total 68 [2018-11-28 13:27:16,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-11-28 13:27:16,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-11-28 13:27:16,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-11-28 13:27:16,520 INFO L87 Difference]: Start difference. First operand 138 states and 139 transitions. Second operand 68 states. [2018-11-28 13:27:16,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:27:16,661 INFO L93 Difference]: Finished difference Result 207 states and 210 transitions. [2018-11-28 13:27:16,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-11-28 13:27:16,661 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 137 [2018-11-28 13:27:16,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:27:16,662 INFO L225 Difference]: With dead ends: 207 [2018-11-28 13:27:16,662 INFO L226 Difference]: Without dead ends: 143 [2018-11-28 13:27:16,663 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-11-28 13:27:16,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-11-28 13:27:16,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 142. [2018-11-28 13:27:16,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2018-11-28 13:27:16,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 143 transitions. [2018-11-28 13:27:16,666 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 143 transitions. Word has length 137 [2018-11-28 13:27:16,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:27:16,666 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 143 transitions. [2018-11-28 13:27:16,667 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-11-28 13:27:16,667 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 143 transitions. [2018-11-28 13:27:16,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2018-11-28 13:27:16,667 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:27:16,667 INFO L402 BasicCegarLoop]: trace histogram [57, 32, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:27:16,667 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:27:16,668 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:27:16,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1341398568, now seen corresponding path program 25 times [2018-11-28 13:27:16,668 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:27:16,668 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:27:16,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:16,668 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:27:16,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:16,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:27:17,029 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 1638 proven. 650 refuted. 0 times theorem prover too weak. 961 trivial. 0 not checked. [2018-11-28 13:27:17,029 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:27:17,029 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_395668a8-7bae-439b-b95c-847034e99bff/bin-2019/uautomizer/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 13:27:17,037 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:27:17,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:27:17,061 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:27:17,072 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 1638 proven. 650 refuted. 0 times theorem prover too weak. 961 trivial. 0 not checked. [2018-11-28 13:27:17,087 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:27:17,087 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-11-28 13:27:17,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-11-28 13:27:17,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-11-28 13:27:17,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-11-28 13:27:17,088 INFO L87 Difference]: Start difference. First operand 142 states and 143 transitions. Second operand 37 states. [2018-11-28 13:27:17,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:27:17,157 INFO L93 Difference]: Finished difference Result 210 states and 212 transitions. [2018-11-28 13:27:17,157 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-11-28 13:27:17,157 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 141 [2018-11-28 13:27:17,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:27:17,158 INFO L225 Difference]: With dead ends: 210 [2018-11-28 13:27:17,158 INFO L226 Difference]: Without dead ends: 144 [2018-11-28 13:27:17,158 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-11-28 13:27:17,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2018-11-28 13:27:17,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2018-11-28 13:27:17,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2018-11-28 13:27:17,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 145 transitions. [2018-11-28 13:27:17,163 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 145 transitions. Word has length 141 [2018-11-28 13:27:17,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:27:17,163 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 145 transitions. [2018-11-28 13:27:17,163 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-11-28 13:27:17,163 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 145 transitions. [2018-11-28 13:27:17,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-11-28 13:27:17,164 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:27:17,164 INFO L402 BasicCegarLoop]: trace histogram [58, 32, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:27:17,164 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:27:17,164 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:27:17,164 INFO L82 PathProgramCache]: Analyzing trace with hash 115200021, now seen corresponding path program 26 times [2018-11-28 13:27:17,165 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:27:17,165 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:27:17,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:17,165 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:27:17,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:17,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:27:17,653 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 1701 proven. 702 refuted. 0 times theorem prover too weak. 961 trivial. 0 not checked. [2018-11-28 13:27:17,653 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:27:17,653 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_395668a8-7bae-439b-b95c-847034e99bff/bin-2019/uautomizer/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 13:27:17,660 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 13:27:17,686 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 13:27:17,686 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:27:17,688 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:27:17,714 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 1701 proven. 702 refuted. 0 times theorem prover too weak. 961 trivial. 0 not checked. [2018-11-28 13:27:17,729 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:27:17,729 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-11-28 13:27:17,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-11-28 13:27:17,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-11-28 13:27:17,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-11-28 13:27:17,730 INFO L87 Difference]: Start difference. First operand 144 states and 145 transitions. Second operand 38 states. [2018-11-28 13:27:17,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:27:17,815 INFO L93 Difference]: Finished difference Result 212 states and 214 transitions. [2018-11-28 13:27:17,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-11-28 13:27:17,816 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 143 [2018-11-28 13:27:17,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:27:17,816 INFO L225 Difference]: With dead ends: 212 [2018-11-28 13:27:17,816 INFO L226 Difference]: Without dead ends: 146 [2018-11-28 13:27:17,817 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-11-28 13:27:17,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-11-28 13:27:17,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2018-11-28 13:27:17,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2018-11-28 13:27:17,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 147 transitions. [2018-11-28 13:27:17,820 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 147 transitions. Word has length 143 [2018-11-28 13:27:17,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:27:17,821 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 147 transitions. [2018-11-28 13:27:17,821 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-11-28 13:27:17,821 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 147 transitions. [2018-11-28 13:27:17,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2018-11-28 13:27:17,821 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:27:17,821 INFO L402 BasicCegarLoop]: trace histogram [59, 32, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:27:17,822 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:27:17,822 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:27:17,822 INFO L82 PathProgramCache]: Analyzing trace with hash -252894446, now seen corresponding path program 27 times [2018-11-28 13:27:17,822 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:27:17,822 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:27:17,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:17,823 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:27:17,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:17,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:27:18,179 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 1764 proven. 756 refuted. 0 times theorem prover too weak. 961 trivial. 0 not checked. [2018-11-28 13:27:18,179 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:27:18,179 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_395668a8-7bae-439b-b95c-847034e99bff/bin-2019/uautomizer/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 13:27:18,185 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 13:27:18,239 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 57 check-sat command(s) [2018-11-28 13:27:18,240 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:27:18,242 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:27:18,253 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 1764 proven. 756 refuted. 0 times theorem prover too weak. 961 trivial. 0 not checked. [2018-11-28 13:27:18,270 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:27:18,270 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-11-28 13:27:18,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-11-28 13:27:18,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-11-28 13:27:18,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-11-28 13:27:18,271 INFO L87 Difference]: Start difference. First operand 146 states and 147 transitions. Second operand 39 states. [2018-11-28 13:27:18,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:27:18,343 INFO L93 Difference]: Finished difference Result 214 states and 216 transitions. [2018-11-28 13:27:18,343 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-11-28 13:27:18,343 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 145 [2018-11-28 13:27:18,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:27:18,344 INFO L225 Difference]: With dead ends: 214 [2018-11-28 13:27:18,344 INFO L226 Difference]: Without dead ends: 148 [2018-11-28 13:27:18,344 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-11-28 13:27:18,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2018-11-28 13:27:18,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2018-11-28 13:27:18,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-11-28 13:27:18,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 149 transitions. [2018-11-28 13:27:18,348 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 149 transitions. Word has length 145 [2018-11-28 13:27:18,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:27:18,348 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 149 transitions. [2018-11-28 13:27:18,348 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-11-28 13:27:18,348 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 149 transitions. [2018-11-28 13:27:18,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-11-28 13:27:18,348 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:27:18,348 INFO L402 BasicCegarLoop]: trace histogram [60, 32, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:27:18,349 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:27:18,349 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:27:18,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1804358961, now seen corresponding path program 28 times [2018-11-28 13:27:18,349 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:27:18,349 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:27:18,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:18,349 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:27:18,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:18,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:27:18,762 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 1827 proven. 812 refuted. 0 times theorem prover too weak. 961 trivial. 0 not checked. [2018-11-28 13:27:18,762 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:27:18,762 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_395668a8-7bae-439b-b95c-847034e99bff/bin-2019/uautomizer/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 13:27:18,768 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 13:27:18,790 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 13:27:18,790 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:27:18,792 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:27:18,809 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 1827 proven. 812 refuted. 0 times theorem prover too weak. 961 trivial. 0 not checked. [2018-11-28 13:27:18,831 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:27:18,831 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-11-28 13:27:18,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-11-28 13:27:18,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-11-28 13:27:18,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-11-28 13:27:18,832 INFO L87 Difference]: Start difference. First operand 148 states and 149 transitions. Second operand 40 states. [2018-11-28 13:27:18,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:27:18,947 INFO L93 Difference]: Finished difference Result 216 states and 218 transitions. [2018-11-28 13:27:18,948 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-11-28 13:27:18,948 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 147 [2018-11-28 13:27:18,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:27:18,948 INFO L225 Difference]: With dead ends: 216 [2018-11-28 13:27:18,949 INFO L226 Difference]: Without dead ends: 150 [2018-11-28 13:27:18,949 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-11-28 13:27:18,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2018-11-28 13:27:18,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2018-11-28 13:27:18,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2018-11-28 13:27:18,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 151 transitions. [2018-11-28 13:27:18,953 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 151 transitions. Word has length 147 [2018-11-28 13:27:18,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:27:18,953 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 151 transitions. [2018-11-28 13:27:18,953 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-11-28 13:27:18,953 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 151 transitions. [2018-11-28 13:27:18,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-11-28 13:27:18,954 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:27:18,954 INFO L402 BasicCegarLoop]: trace histogram [61, 32, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:27:18,955 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:27:18,955 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:27:18,955 INFO L82 PathProgramCache]: Analyzing trace with hash 1886861132, now seen corresponding path program 29 times [2018-11-28 13:27:18,955 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:27:18,955 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:27:18,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:18,956 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:27:18,956 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:18,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:27:19,338 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 1890 proven. 870 refuted. 0 times theorem prover too weak. 961 trivial. 0 not checked. [2018-11-28 13:27:19,338 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:27:19,338 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_395668a8-7bae-439b-b95c-847034e99bff/bin-2019/uautomizer/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 13:27:19,346 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-28 13:27:19,431 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 62 check-sat command(s) [2018-11-28 13:27:19,431 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:27:19,433 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:27:20,257 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 1885 proven. 1024 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2018-11-28 13:27:20,272 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:27:20,272 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 35] total 74 [2018-11-28 13:27:20,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-11-28 13:27:20,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-11-28 13:27:20,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-11-28 13:27:20,273 INFO L87 Difference]: Start difference. First operand 150 states and 151 transitions. Second operand 74 states. [2018-11-28 13:27:20,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:27:20,432 INFO L93 Difference]: Finished difference Result 221 states and 224 transitions. [2018-11-28 13:27:20,432 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-11-28 13:27:20,433 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 149 [2018-11-28 13:27:20,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:27:20,433 INFO L225 Difference]: With dead ends: 221 [2018-11-28 13:27:20,433 INFO L226 Difference]: Without dead ends: 155 [2018-11-28 13:27:20,434 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-11-28 13:27:20,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-11-28 13:27:20,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 154. [2018-11-28 13:27:20,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2018-11-28 13:27:20,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 155 transitions. [2018-11-28 13:27:20,438 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 155 transitions. Word has length 149 [2018-11-28 13:27:20,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:27:20,439 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 155 transitions. [2018-11-28 13:27:20,439 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-11-28 13:27:20,439 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 155 transitions. [2018-11-28 13:27:20,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2018-11-28 13:27:20,440 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:27:20,440 INFO L402 BasicCegarLoop]: trace histogram [63, 33, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:27:20,440 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:27:20,440 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:27:20,440 INFO L82 PathProgramCache]: Analyzing trace with hash 223515555, now seen corresponding path program 30 times [2018-11-28 13:27:20,440 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:27:20,440 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:27:20,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:20,441 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:27:20,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:20,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:27:20,873 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 2015 proven. 930 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2018-11-28 13:27:20,873 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:27:20,873 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_395668a8-7bae-439b-b95c-847034e99bff/bin-2019/uautomizer/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 13:27:20,881 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-28 13:27:20,975 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 63 check-sat command(s) [2018-11-28 13:27:20,975 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:27:20,977 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:27:22,010 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 2010 proven. 1089 refuted. 0 times theorem prover too weak. 870 trivial. 0 not checked. [2018-11-28 13:27:22,028 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:27:22,029 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 36] total 76 [2018-11-28 13:27:22,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-11-28 13:27:22,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-11-28 13:27:22,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-11-28 13:27:22,030 INFO L87 Difference]: Start difference. First operand 154 states and 155 transitions. Second operand 76 states. [2018-11-28 13:27:22,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:27:22,235 INFO L93 Difference]: Finished difference Result 227 states and 230 transitions. [2018-11-28 13:27:22,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-11-28 13:27:22,235 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 153 [2018-11-28 13:27:22,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:27:22,236 INFO L225 Difference]: With dead ends: 227 [2018-11-28 13:27:22,236 INFO L226 Difference]: Without dead ends: 159 [2018-11-28 13:27:22,237 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-11-28 13:27:22,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-11-28 13:27:22,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 158. [2018-11-28 13:27:22,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2018-11-28 13:27:22,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 159 transitions. [2018-11-28 13:27:22,241 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 159 transitions. Word has length 153 [2018-11-28 13:27:22,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:27:22,241 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 159 transitions. [2018-11-28 13:27:22,241 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-11-28 13:27:22,241 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 159 transitions. [2018-11-28 13:27:22,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2018-11-28 13:27:22,242 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:27:22,242 INFO L402 BasicCegarLoop]: trace histogram [65, 34, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:27:22,242 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:27:22,243 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:27:22,243 INFO L82 PathProgramCache]: Analyzing trace with hash -39129158, now seen corresponding path program 31 times [2018-11-28 13:27:22,243 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:27:22,243 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:27:22,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:22,244 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:27:22,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:22,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:27:22,764 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 2144 proven. 992 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2018-11-28 13:27:22,764 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:27:22,764 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_395668a8-7bae-439b-b95c-847034e99bff/bin-2019/uautomizer/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 13:27:22,770 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:27:22,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:27:22,794 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:27:22,817 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 2144 proven. 992 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2018-11-28 13:27:22,841 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:27:22,841 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-11-28 13:27:22,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-11-28 13:27:22,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-11-28 13:27:22,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-11-28 13:27:22,842 INFO L87 Difference]: Start difference. First operand 158 states and 159 transitions. Second operand 43 states. [2018-11-28 13:27:22,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:27:22,931 INFO L93 Difference]: Finished difference Result 230 states and 232 transitions. [2018-11-28 13:27:22,932 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-11-28 13:27:22,932 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 157 [2018-11-28 13:27:22,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:27:22,933 INFO L225 Difference]: With dead ends: 230 [2018-11-28 13:27:22,933 INFO L226 Difference]: Without dead ends: 160 [2018-11-28 13:27:22,934 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-11-28 13:27:22,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2018-11-28 13:27:22,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2018-11-28 13:27:22,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-11-28 13:27:22,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 161 transitions. [2018-11-28 13:27:22,937 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 161 transitions. Word has length 157 [2018-11-28 13:27:22,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:27:22,938 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 161 transitions. [2018-11-28 13:27:22,942 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-11-28 13:27:22,942 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 161 transitions. [2018-11-28 13:27:22,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2018-11-28 13:27:22,943 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:27:22,943 INFO L402 BasicCegarLoop]: trace histogram [66, 34, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:27:22,943 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:27:22,943 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:27:22,944 INFO L82 PathProgramCache]: Analyzing trace with hash -1218788361, now seen corresponding path program 32 times [2018-11-28 13:27:22,944 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:27:22,944 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:27:22,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:22,944 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:27:22,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:22,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:27:23,610 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 2211 proven. 1056 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2018-11-28 13:27:23,611 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:27:23,611 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_395668a8-7bae-439b-b95c-847034e99bff/bin-2019/uautomizer/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 13:27:23,620 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 13:27:23,644 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 13:27:23,644 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:27:23,646 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:27:23,669 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 2211 proven. 1056 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2018-11-28 13:27:23,691 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:27:23,691 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-11-28 13:27:23,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-11-28 13:27:23,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-11-28 13:27:23,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-11-28 13:27:23,692 INFO L87 Difference]: Start difference. First operand 160 states and 161 transitions. Second operand 44 states. [2018-11-28 13:27:23,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:27:23,778 INFO L93 Difference]: Finished difference Result 232 states and 234 transitions. [2018-11-28 13:27:23,779 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-11-28 13:27:23,779 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 159 [2018-11-28 13:27:23,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:27:23,779 INFO L225 Difference]: With dead ends: 232 [2018-11-28 13:27:23,780 INFO L226 Difference]: Without dead ends: 162 [2018-11-28 13:27:23,780 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-11-28 13:27:23,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2018-11-28 13:27:23,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2018-11-28 13:27:23,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2018-11-28 13:27:23,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 163 transitions. [2018-11-28 13:27:23,784 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 163 transitions. Word has length 159 [2018-11-28 13:27:23,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:27:23,784 INFO L480 AbstractCegarLoop]: Abstraction has 162 states and 163 transitions. [2018-11-28 13:27:23,784 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-11-28 13:27:23,784 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 163 transitions. [2018-11-28 13:27:23,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2018-11-28 13:27:23,785 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:27:23,785 INFO L402 BasicCegarLoop]: trace histogram [67, 34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:27:23,785 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:27:23,785 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:27:23,785 INFO L82 PathProgramCache]: Analyzing trace with hash -999916300, now seen corresponding path program 33 times [2018-11-28 13:27:23,785 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:27:23,785 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:27:23,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:23,789 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:27:23,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:23,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:27:24,260 INFO L134 CoverageAnalysis]: Checked inductivity of 4489 backedges. 2278 proven. 1122 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2018-11-28 13:27:24,260 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:27:24,260 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_395668a8-7bae-439b-b95c-847034e99bff/bin-2019/uautomizer/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 13:27:24,266 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 13:27:24,339 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 68 check-sat command(s) [2018-11-28 13:27:24,339 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:27:24,341 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:27:24,355 INFO L134 CoverageAnalysis]: Checked inductivity of 4489 backedges. 2278 proven. 1122 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2018-11-28 13:27:24,370 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:27:24,370 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-11-28 13:27:24,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-11-28 13:27:24,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-11-28 13:27:24,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-11-28 13:27:24,370 INFO L87 Difference]: Start difference. First operand 162 states and 163 transitions. Second operand 45 states. [2018-11-28 13:27:24,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:27:24,458 INFO L93 Difference]: Finished difference Result 234 states and 236 transitions. [2018-11-28 13:27:24,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-11-28 13:27:24,459 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 161 [2018-11-28 13:27:24,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:27:24,459 INFO L225 Difference]: With dead ends: 234 [2018-11-28 13:27:24,459 INFO L226 Difference]: Without dead ends: 164 [2018-11-28 13:27:24,460 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-11-28 13:27:24,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2018-11-28 13:27:24,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2018-11-28 13:27:24,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2018-11-28 13:27:24,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 165 transitions. [2018-11-28 13:27:24,465 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 165 transitions. Word has length 161 [2018-11-28 13:27:24,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:27:24,465 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 165 transitions. [2018-11-28 13:27:24,465 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-11-28 13:27:24,465 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 165 transitions. [2018-11-28 13:27:24,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2018-11-28 13:27:24,466 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:27:24,466 INFO L402 BasicCegarLoop]: trace histogram [68, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:27:24,466 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:27:24,466 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:27:24,466 INFO L82 PathProgramCache]: Analyzing trace with hash -1117263183, now seen corresponding path program 34 times [2018-11-28 13:27:24,466 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:27:24,467 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:27:24,467 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:24,467 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:27:24,467 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:24,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:27:24,933 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 2345 proven. 1190 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2018-11-28 13:27:24,934 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:27:24,934 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_395668a8-7bae-439b-b95c-847034e99bff/bin-2019/uautomizer/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 13:27:24,942 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 13:27:24,967 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 13:27:24,967 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:27:24,969 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:27:24,982 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 2345 proven. 1190 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2018-11-28 13:27:24,997 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:27:24,997 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-11-28 13:27:24,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-11-28 13:27:24,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-11-28 13:27:24,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-11-28 13:27:24,997 INFO L87 Difference]: Start difference. First operand 164 states and 165 transitions. Second operand 46 states. [2018-11-28 13:27:25,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:27:25,094 INFO L93 Difference]: Finished difference Result 236 states and 238 transitions. [2018-11-28 13:27:25,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-11-28 13:27:25,095 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 163 [2018-11-28 13:27:25,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:27:25,095 INFO L225 Difference]: With dead ends: 236 [2018-11-28 13:27:25,095 INFO L226 Difference]: Without dead ends: 166 [2018-11-28 13:27:25,095 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-11-28 13:27:25,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2018-11-28 13:27:25,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2018-11-28 13:27:25,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2018-11-28 13:27:25,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 167 transitions. [2018-11-28 13:27:25,099 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 167 transitions. Word has length 163 [2018-11-28 13:27:25,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:27:25,099 INFO L480 AbstractCegarLoop]: Abstraction has 166 states and 167 transitions. [2018-11-28 13:27:25,099 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-11-28 13:27:25,099 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 167 transitions. [2018-11-28 13:27:25,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2018-11-28 13:27:25,100 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:27:25,100 INFO L402 BasicCegarLoop]: trace histogram [69, 35, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:27:25,100 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:27:25,100 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:27:25,100 INFO L82 PathProgramCache]: Analyzing trace with hash 2076499246, now seen corresponding path program 35 times [2018-11-28 13:27:25,100 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:27:25,100 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:27:25,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:25,101 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:27:25,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:25,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:27:25,596 INFO L134 CoverageAnalysis]: Checked inductivity of 4761 backedges. 2412 proven. 1260 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2018-11-28 13:27:25,596 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:27:25,596 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_395668a8-7bae-439b-b95c-847034e99bff/bin-2019/uautomizer/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 13:27:25,603 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-28 13:27:25,663 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 70 check-sat command(s) [2018-11-28 13:27:25,663 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:27:25,666 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:27:26,621 INFO L134 CoverageAnalysis]: Checked inductivity of 4761 backedges. 2415 proven. 1156 refuted. 0 times theorem prover too weak. 1190 trivial. 0 not checked. [2018-11-28 13:27:26,636 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:27:26,636 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 37] total 82 [2018-11-28 13:27:26,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-11-28 13:27:26,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-11-28 13:27:26,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-11-28 13:27:26,637 INFO L87 Difference]: Start difference. First operand 166 states and 167 transitions. Second operand 82 states. [2018-11-28 13:27:26,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:27:26,803 INFO L93 Difference]: Finished difference Result 241 states and 244 transitions. [2018-11-28 13:27:26,803 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-11-28 13:27:26,803 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 165 [2018-11-28 13:27:26,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:27:26,803 INFO L225 Difference]: With dead ends: 241 [2018-11-28 13:27:26,803 INFO L226 Difference]: Without dead ends: 171 [2018-11-28 13:27:26,804 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-11-28 13:27:26,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-11-28 13:27:26,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 170. [2018-11-28 13:27:26,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2018-11-28 13:27:26,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 171 transitions. [2018-11-28 13:27:26,807 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 171 transitions. Word has length 165 [2018-11-28 13:27:26,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:27:26,807 INFO L480 AbstractCegarLoop]: Abstraction has 170 states and 171 transitions. [2018-11-28 13:27:26,807 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-11-28 13:27:26,807 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 171 transitions. [2018-11-28 13:27:26,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2018-11-28 13:27:26,807 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:27:26,807 INFO L402 BasicCegarLoop]: trace histogram [71, 36, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:27:26,808 INFO L423 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:27:26,808 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:27:26,808 INFO L82 PathProgramCache]: Analyzing trace with hash 654618373, now seen corresponding path program 36 times [2018-11-28 13:27:26,808 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:27:26,808 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:27:26,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:26,808 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:27:26,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:26,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:27:27,313 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 2553 proven. 1332 refuted. 0 times theorem prover too weak. 1156 trivial. 0 not checked. [2018-11-28 13:27:27,313 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:27:27,313 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_395668a8-7bae-439b-b95c-847034e99bff/bin-2019/uautomizer/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 13:27:27,318 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-28 13:27:27,388 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 71 check-sat command(s) [2018-11-28 13:27:27,389 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:27:27,391 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:27:28,375 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 2556 proven. 1225 refuted. 0 times theorem prover too weak. 1260 trivial. 0 not checked. [2018-11-28 13:27:28,389 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:27:28,389 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 38] total 84 [2018-11-28 13:27:28,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-11-28 13:27:28,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-11-28 13:27:28,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-11-28 13:27:28,391 INFO L87 Difference]: Start difference. First operand 170 states and 171 transitions. Second operand 84 states. [2018-11-28 13:27:28,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:27:28,554 INFO L93 Difference]: Finished difference Result 247 states and 250 transitions. [2018-11-28 13:27:28,554 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-11-28 13:27:28,554 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 169 [2018-11-28 13:27:28,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:27:28,555 INFO L225 Difference]: With dead ends: 247 [2018-11-28 13:27:28,555 INFO L226 Difference]: Without dead ends: 175 [2018-11-28 13:27:28,555 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-11-28 13:27:28,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-11-28 13:27:28,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 174. [2018-11-28 13:27:28,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2018-11-28 13:27:28,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 175 transitions. [2018-11-28 13:27:28,559 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 175 transitions. Word has length 169 [2018-11-28 13:27:28,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:27:28,559 INFO L480 AbstractCegarLoop]: Abstraction has 174 states and 175 transitions. [2018-11-28 13:27:28,559 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-11-28 13:27:28,559 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 175 transitions. [2018-11-28 13:27:28,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-11-28 13:27:28,559 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:27:28,559 INFO L402 BasicCegarLoop]: trace histogram [73, 37, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:27:28,560 INFO L423 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:27:28,560 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:27:28,560 INFO L82 PathProgramCache]: Analyzing trace with hash 819404956, now seen corresponding path program 37 times [2018-11-28 13:27:28,560 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:27:28,560 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:27:28,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:28,560 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:27:28,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:28,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:27:29,082 INFO L134 CoverageAnalysis]: Checked inductivity of 5329 backedges. 2698 proven. 1406 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2018-11-28 13:27:29,082 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:27:29,082 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_395668a8-7bae-439b-b95c-847034e99bff/bin-2019/uautomizer/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 13:27:29,088 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:27:29,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:27:29,114 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:27:29,129 INFO L134 CoverageAnalysis]: Checked inductivity of 5329 backedges. 2698 proven. 1406 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2018-11-28 13:27:29,143 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:27:29,143 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-11-28 13:27:29,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-11-28 13:27:29,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-11-28 13:27:29,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-11-28 13:27:29,144 INFO L87 Difference]: Start difference. First operand 174 states and 175 transitions. Second operand 49 states. [2018-11-28 13:27:29,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:27:29,231 INFO L93 Difference]: Finished difference Result 250 states and 252 transitions. [2018-11-28 13:27:29,231 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-11-28 13:27:29,231 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 173 [2018-11-28 13:27:29,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:27:29,232 INFO L225 Difference]: With dead ends: 250 [2018-11-28 13:27:29,232 INFO L226 Difference]: Without dead ends: 176 [2018-11-28 13:27:29,233 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-11-28 13:27:29,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2018-11-28 13:27:29,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2018-11-28 13:27:29,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2018-11-28 13:27:29,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 177 transitions. [2018-11-28 13:27:29,237 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 177 transitions. Word has length 173 [2018-11-28 13:27:29,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:27:29,237 INFO L480 AbstractCegarLoop]: Abstraction has 176 states and 177 transitions. [2018-11-28 13:27:29,237 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-11-28 13:27:29,237 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 177 transitions. [2018-11-28 13:27:29,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2018-11-28 13:27:29,238 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:27:29,238 INFO L402 BasicCegarLoop]: trace histogram [74, 38, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:27:29,238 INFO L423 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:27:29,238 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:27:29,238 INFO L82 PathProgramCache]: Analyzing trace with hash -1864836391, now seen corresponding path program 38 times [2018-11-28 13:27:29,238 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:27:29,238 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:27:29,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:29,239 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:27:29,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:29,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:27:29,801 INFO L134 CoverageAnalysis]: Checked inductivity of 5476 backedges. 2769 proven. 1482 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2018-11-28 13:27:29,801 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:27:29,801 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_395668a8-7bae-439b-b95c-847034e99bff/bin-2019/uautomizer/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 13:27:29,813 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 13:27:29,840 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 13:27:29,840 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:27:29,842 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:27:29,857 INFO L134 CoverageAnalysis]: Checked inductivity of 5476 backedges. 2769 proven. 1482 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2018-11-28 13:27:29,872 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:27:29,872 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-11-28 13:27:29,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-11-28 13:27:29,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-11-28 13:27:29,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-11-28 13:27:29,873 INFO L87 Difference]: Start difference. First operand 176 states and 177 transitions. Second operand 50 states. [2018-11-28 13:27:29,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:27:29,997 INFO L93 Difference]: Finished difference Result 252 states and 254 transitions. [2018-11-28 13:27:29,998 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-11-28 13:27:29,998 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 175 [2018-11-28 13:27:29,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:27:29,999 INFO L225 Difference]: With dead ends: 252 [2018-11-28 13:27:29,999 INFO L226 Difference]: Without dead ends: 178 [2018-11-28 13:27:30,000 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-11-28 13:27:30,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2018-11-28 13:27:30,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2018-11-28 13:27:30,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2018-11-28 13:27:30,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 179 transitions. [2018-11-28 13:27:30,004 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 179 transitions. Word has length 175 [2018-11-28 13:27:30,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:27:30,004 INFO L480 AbstractCegarLoop]: Abstraction has 178 states and 179 transitions. [2018-11-28 13:27:30,004 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-11-28 13:27:30,004 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 179 transitions. [2018-11-28 13:27:30,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2018-11-28 13:27:30,005 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:27:30,005 INFO L402 BasicCegarLoop]: trace histogram [75, 39, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:27:30,005 INFO L423 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:27:30,005 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:27:30,005 INFO L82 PathProgramCache]: Analyzing trace with hash -145425962, now seen corresponding path program 39 times [2018-11-28 13:27:30,005 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:27:30,005 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:27:30,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:30,006 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:27:30,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:30,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:27:30,625 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 2840 proven. 1560 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2018-11-28 13:27:30,625 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:27:30,625 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_395668a8-7bae-439b-b95c-847034e99bff/bin-2019/uautomizer/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 13:27:30,632 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 13:27:30,709 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 74 check-sat command(s) [2018-11-28 13:27:30,710 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:27:30,712 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:27:31,796 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 2847 proven. 1296 refuted. 0 times theorem prover too weak. 1482 trivial. 0 not checked. [2018-11-28 13:27:31,810 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:27:31,810 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 39] total 88 [2018-11-28 13:27:31,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-11-28 13:27:31,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-11-28 13:27:31,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-11-28 13:27:31,811 INFO L87 Difference]: Start difference. First operand 178 states and 179 transitions. Second operand 88 states. [2018-11-28 13:27:32,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:27:32,015 INFO L93 Difference]: Finished difference Result 257 states and 260 transitions. [2018-11-28 13:27:32,016 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-11-28 13:27:32,016 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 177 [2018-11-28 13:27:32,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:27:32,016 INFO L225 Difference]: With dead ends: 257 [2018-11-28 13:27:32,016 INFO L226 Difference]: Without dead ends: 183 [2018-11-28 13:27:32,016 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-11-28 13:27:32,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-11-28 13:27:32,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 182. [2018-11-28 13:27:32,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2018-11-28 13:27:32,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 183 transitions. [2018-11-28 13:27:32,019 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 183 transitions. Word has length 177 [2018-11-28 13:27:32,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:27:32,020 INFO L480 AbstractCegarLoop]: Abstraction has 182 states and 183 transitions. [2018-11-28 13:27:32,020 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-11-28 13:27:32,020 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 183 transitions. [2018-11-28 13:27:32,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2018-11-28 13:27:32,020 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:27:32,020 INFO L402 BasicCegarLoop]: trace histogram [77, 40, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:27:32,020 INFO L423 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:27:32,020 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:27:32,020 INFO L82 PathProgramCache]: Analyzing trace with hash -223007187, now seen corresponding path program 40 times [2018-11-28 13:27:32,020 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:27:32,020 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:27:32,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:32,021 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:27:32,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:32,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:27:32,606 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 2993 proven. 1640 refuted. 0 times theorem prover too weak. 1296 trivial. 0 not checked. [2018-11-28 13:27:32,606 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:27:32,606 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_395668a8-7bae-439b-b95c-847034e99bff/bin-2019/uautomizer/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 13:27:32,612 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 13:27:32,639 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 13:27:32,639 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:27:32,641 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:27:32,657 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 2993 proven. 1640 refuted. 0 times theorem prover too weak. 1296 trivial. 0 not checked. [2018-11-28 13:27:32,683 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:27:32,683 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-11-28 13:27:32,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-11-28 13:27:32,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-11-28 13:27:32,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-11-28 13:27:32,684 INFO L87 Difference]: Start difference. First operand 182 states and 183 transitions. Second operand 52 states. [2018-11-28 13:27:32,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:27:32,823 INFO L93 Difference]: Finished difference Result 260 states and 262 transitions. [2018-11-28 13:27:32,823 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-11-28 13:27:32,823 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 181 [2018-11-28 13:27:32,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:27:32,824 INFO L225 Difference]: With dead ends: 260 [2018-11-28 13:27:32,824 INFO L226 Difference]: Without dead ends: 184 [2018-11-28 13:27:32,824 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-11-28 13:27:32,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2018-11-28 13:27:32,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2018-11-28 13:27:32,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2018-11-28 13:27:32,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 185 transitions. [2018-11-28 13:27:32,828 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 185 transitions. Word has length 181 [2018-11-28 13:27:32,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:27:32,828 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 185 transitions. [2018-11-28 13:27:32,828 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-11-28 13:27:32,828 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 185 transitions. [2018-11-28 13:27:32,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2018-11-28 13:27:32,829 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:27:32,829 INFO L402 BasicCegarLoop]: trace histogram [78, 41, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:27:32,830 INFO L423 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:27:32,830 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:27:32,830 INFO L82 PathProgramCache]: Analyzing trace with hash -827630742, now seen corresponding path program 41 times [2018-11-28 13:27:32,830 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:27:32,830 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:27:32,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:32,831 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:27:32,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:32,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:27:33,311 INFO L134 CoverageAnalysis]: Checked inductivity of 6084 backedges. 3081 proven. 1521 refuted. 0 times theorem prover too weak. 1482 trivial. 0 not checked. [2018-11-28 13:27:33,311 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:27:33,311 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_395668a8-7bae-439b-b95c-847034e99bff/bin-2019/uautomizer/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 13:27:33,318 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-28 13:27:33,409 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 79 check-sat command(s) [2018-11-28 13:27:33,409 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:27:33,411 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:27:33,444 INFO L134 CoverageAnalysis]: Checked inductivity of 6084 backedges. 3080 proven. 1444 refuted. 0 times theorem prover too weak. 1560 trivial. 0 not checked. [2018-11-28 13:27:33,462 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:27:33,463 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41] total 42 [2018-11-28 13:27:33,463 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-11-28 13:27:33,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-11-28 13:27:33,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-11-28 13:27:33,463 INFO L87 Difference]: Start difference. First operand 184 states and 185 transitions. Second operand 42 states. [2018-11-28 13:27:33,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:27:33,555 INFO L93 Difference]: Finished difference Result 194 states and 197 transitions. [2018-11-28 13:27:33,555 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-11-28 13:27:33,555 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 183 [2018-11-28 13:27:33,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:27:33,556 INFO L225 Difference]: With dead ends: 194 [2018-11-28 13:27:33,556 INFO L226 Difference]: Without dead ends: 191 [2018-11-28 13:27:33,557 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-11-28 13:27:33,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-11-28 13:27:33,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 190. [2018-11-28 13:27:33,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2018-11-28 13:27:33,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 191 transitions. [2018-11-28 13:27:33,563 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 191 transitions. Word has length 183 [2018-11-28 13:27:33,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:27:33,563 INFO L480 AbstractCegarLoop]: Abstraction has 190 states and 191 transitions. [2018-11-28 13:27:33,563 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-11-28 13:27:33,563 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 191 transitions. [2018-11-28 13:27:33,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2018-11-28 13:27:33,564 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:27:33,564 INFO L402 BasicCegarLoop]: trace histogram [81, 41, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:27:33,564 INFO L423 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:27:33,565 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:27:33,565 INFO L82 PathProgramCache]: Analyzing trace with hash 65889400, now seen corresponding path program 42 times [2018-11-28 13:27:33,565 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:27:33,565 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:27:33,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:33,566 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:27:33,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:33,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:27:34,098 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 3315 proven. 1764 refuted. 0 times theorem prover too weak. 1482 trivial. 0 not checked. [2018-11-28 13:27:34,098 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:27:34,098 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_395668a8-7bae-439b-b95c-847034e99bff/bin-2019/uautomizer/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 13:27:34,106 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-28 13:27:34,218 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 82 check-sat command(s) [2018-11-28 13:27:34,218 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:27:34,221 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:27:34,945 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 0 proven. 6561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 13:27:34,960 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:27:34,960 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 93] total 95 [2018-11-28 13:27:34,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-11-28 13:27:34,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-11-28 13:27:34,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-11-28 13:27:34,961 INFO L87 Difference]: Start difference. First operand 190 states and 191 transitions. Second operand 95 states. [2018-11-28 13:27:35,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:27:35,182 INFO L93 Difference]: Finished difference Result 200 states and 203 transitions. [2018-11-28 13:27:35,182 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-11-28 13:27:35,182 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 189 [2018-11-28 13:27:35,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:27:35,183 INFO L225 Difference]: With dead ends: 200 [2018-11-28 13:27:35,183 INFO L226 Difference]: Without dead ends: 197 [2018-11-28 13:27:35,183 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4200 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-11-28 13:27:35,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2018-11-28 13:27:35,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 196. [2018-11-28 13:27:35,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2018-11-28 13:27:35,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 197 transitions. [2018-11-28 13:27:35,187 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 197 transitions. Word has length 189 [2018-11-28 13:27:35,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:27:35,187 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 197 transitions. [2018-11-28 13:27:35,187 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-11-28 13:27:35,187 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 197 transitions. [2018-11-28 13:27:35,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2018-11-28 13:27:35,187 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:27:35,187 INFO L402 BasicCegarLoop]: trace histogram [84, 43, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:27:35,188 INFO L423 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:27:35,188 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:27:35,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1134826746, now seen corresponding path program 43 times [2018-11-28 13:27:35,188 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:27:35,188 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:27:35,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:35,188 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:27:35,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:35,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:27:35,724 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 3549 proven. 2025 refuted. 0 times theorem prover too weak. 1482 trivial. 0 not checked. [2018-11-28 13:27:35,724 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:27:35,724 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_395668a8-7bae-439b-b95c-847034e99bff/bin-2019/uautomizer/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 13:27:35,731 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:27:35,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:27:35,761 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:27:36,357 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 0 proven. 7056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 13:27:36,372 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:27:36,372 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 96] total 98 [2018-11-28 13:27:36,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-11-28 13:27:36,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-11-28 13:27:36,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-11-28 13:27:36,375 INFO L87 Difference]: Start difference. First operand 196 states and 197 transitions. Second operand 98 states. [2018-11-28 13:27:36,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:27:36,620 INFO L93 Difference]: Finished difference Result 206 states and 209 transitions. [2018-11-28 13:27:36,620 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-11-28 13:27:36,620 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 195 [2018-11-28 13:27:36,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:27:36,621 INFO L225 Difference]: With dead ends: 206 [2018-11-28 13:27:36,621 INFO L226 Difference]: Without dead ends: 203 [2018-11-28 13:27:36,622 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4500 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-11-28 13:27:36,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-11-28 13:27:36,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 202. [2018-11-28 13:27:36,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2018-11-28 13:27:36,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 203 transitions. [2018-11-28 13:27:36,626 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 203 transitions. Word has length 195 [2018-11-28 13:27:36,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:27:36,627 INFO L480 AbstractCegarLoop]: Abstraction has 202 states and 203 transitions. [2018-11-28 13:27:36,627 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-11-28 13:27:36,627 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 203 transitions. [2018-11-28 13:27:36,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2018-11-28 13:27:36,627 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:27:36,628 INFO L402 BasicCegarLoop]: trace histogram [87, 46, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:27:36,628 INFO L423 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:27:36,628 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:27:36,628 INFO L82 PathProgramCache]: Analyzing trace with hash -989671660, now seen corresponding path program 44 times [2018-11-28 13:27:36,628 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:27:36,628 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:27:36,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:36,629 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:27:36,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:36,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:27:37,245 INFO L134 CoverageAnalysis]: Checked inductivity of 7569 backedges. 3783 proven. 2304 refuted. 0 times theorem prover too weak. 1482 trivial. 0 not checked. [2018-11-28 13:27:37,245 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:27:37,245 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_395668a8-7bae-439b-b95c-847034e99bff/bin-2019/uautomizer/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 13:27:37,252 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 13:27:37,280 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 13:27:37,280 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:27:37,284 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:27:37,900 INFO L134 CoverageAnalysis]: Checked inductivity of 7569 backedges. 0 proven. 7569 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 13:27:37,914 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:27:37,914 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 99] total 101 [2018-11-28 13:27:37,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-11-28 13:27:37,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-11-28 13:27:37,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-11-28 13:27:37,915 INFO L87 Difference]: Start difference. First operand 202 states and 203 transitions. Second operand 101 states. [2018-11-28 13:27:38,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:27:38,145 INFO L93 Difference]: Finished difference Result 212 states and 215 transitions. [2018-11-28 13:27:38,145 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-11-28 13:27:38,145 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 201 [2018-11-28 13:27:38,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:27:38,146 INFO L225 Difference]: With dead ends: 212 [2018-11-28 13:27:38,146 INFO L226 Difference]: Without dead ends: 209 [2018-11-28 13:27:38,146 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4800 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-11-28 13:27:38,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2018-11-28 13:27:38,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 208. [2018-11-28 13:27:38,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2018-11-28 13:27:38,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 209 transitions. [2018-11-28 13:27:38,150 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 209 transitions. Word has length 201 [2018-11-28 13:27:38,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:27:38,150 INFO L480 AbstractCegarLoop]: Abstraction has 208 states and 209 transitions. [2018-11-28 13:27:38,150 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-11-28 13:27:38,150 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 209 transitions. [2018-11-28 13:27:38,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2018-11-28 13:27:38,151 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:27:38,151 INFO L402 BasicCegarLoop]: trace histogram [90, 49, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:27:38,151 INFO L423 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:27:38,151 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:27:38,152 INFO L82 PathProgramCache]: Analyzing trace with hash 713420962, now seen corresponding path program 45 times [2018-11-28 13:27:38,152 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:27:38,152 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:27:38,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:38,152 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:27:38,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:38,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:27:38,770 INFO L134 CoverageAnalysis]: Checked inductivity of 8100 backedges. 4059 proven. 2401 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2018-11-28 13:27:38,770 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:27:38,770 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_395668a8-7bae-439b-b95c-847034e99bff/bin-2019/uautomizer/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 13:27:38,776 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 13:27:38,877 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 91 check-sat command(s) [2018-11-28 13:27:38,877 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:27:38,880 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:27:39,629 INFO L134 CoverageAnalysis]: Checked inductivity of 8100 backedges. 0 proven. 8100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 13:27:39,654 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:27:39,654 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 102] total 102 [2018-11-28 13:27:39,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-11-28 13:27:39,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-11-28 13:27:39,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-11-28 13:27:39,656 INFO L87 Difference]: Start difference. First operand 208 states and 209 transitions. Second operand 102 states. [2018-11-28 13:27:39,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:27:39,980 INFO L93 Difference]: Finished difference Result 213 states and 214 transitions. [2018-11-28 13:27:39,980 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-11-28 13:27:39,980 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 207 [2018-11-28 13:27:39,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:27:39,981 INFO L225 Difference]: With dead ends: 213 [2018-11-28 13:27:39,981 INFO L226 Difference]: Without dead ends: 210 [2018-11-28 13:27:39,981 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4900 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-11-28 13:27:39,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2018-11-28 13:27:39,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 210. [2018-11-28 13:27:39,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2018-11-28 13:27:39,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 211 transitions. [2018-11-28 13:27:39,985 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 211 transitions. Word has length 207 [2018-11-28 13:27:39,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:27:39,986 INFO L480 AbstractCegarLoop]: Abstraction has 210 states and 211 transitions. [2018-11-28 13:27:39,986 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-11-28 13:27:39,986 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 211 transitions. [2018-11-28 13:27:39,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2018-11-28 13:27:39,986 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:27:39,986 INFO L402 BasicCegarLoop]: trace histogram [91, 50, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:27:39,987 INFO L423 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:27:39,987 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:27:39,987 INFO L82 PathProgramCache]: Analyzing trace with hash -1604761220, now seen corresponding path program 46 times [2018-11-28 13:27:39,987 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:27:39,987 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:27:39,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:39,987 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:27:39,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:39,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:27:41,183 INFO L134 CoverageAnalysis]: Checked inductivity of 8281 backedges. 0 proven. 6559 refuted. 0 times theorem prover too weak. 1722 trivial. 0 not checked. [2018-11-28 13:27:41,183 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:27:41,183 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_395668a8-7bae-439b-b95c-847034e99bff/bin-2019/uautomizer/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 13:27:41,190 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 13:27:41,226 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 13:27:41,227 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:27:41,230 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:27:41,297 INFO L134 CoverageAnalysis]: Checked inductivity of 8281 backedges. 0 proven. 6559 refuted. 0 times theorem prover too weak. 1722 trivial. 0 not checked. [2018-11-28 13:27:41,311 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:27:41,311 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-11-28 13:27:41,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-11-28 13:27:41,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-11-28 13:27:41,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=2757, Unknown=0, NotChecked=0, Total=2862 [2018-11-28 13:27:41,312 INFO L87 Difference]: Start difference. First operand 210 states and 211 transitions. Second operand 54 states. [2018-11-28 13:27:42,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:27:42,124 INFO L93 Difference]: Finished difference Result 216 states and 217 transitions. [2018-11-28 13:27:42,124 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-11-28 13:27:42,124 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 209 [2018-11-28 13:27:42,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:27:42,125 INFO L225 Difference]: With dead ends: 216 [2018-11-28 13:27:42,125 INFO L226 Difference]: Without dead ends: 213 [2018-11-28 13:27:42,125 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 209 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=109, Invalid=2861, Unknown=0, NotChecked=0, Total=2970 [2018-11-28 13:27:42,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2018-11-28 13:27:42,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 212. [2018-11-28 13:27:42,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2018-11-28 13:27:42,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 213 transitions. [2018-11-28 13:27:42,132 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 213 transitions. Word has length 209 [2018-11-28 13:27:42,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:27:42,132 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 213 transitions. [2018-11-28 13:27:42,132 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-11-28 13:27:42,132 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 213 transitions. [2018-11-28 13:27:42,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2018-11-28 13:27:42,133 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:27:42,133 INFO L402 BasicCegarLoop]: trace histogram [92, 51, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:27:42,133 INFO L423 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:27:42,133 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:27:42,134 INFO L82 PathProgramCache]: Analyzing trace with hash -289811498, now seen corresponding path program 47 times [2018-11-28 13:27:42,134 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:27:42,134 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:27:42,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:42,134 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:27:42,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:27:42,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:27:42,780 INFO L134 CoverageAnalysis]: Checked inductivity of 8464 backedges. 6742 proven. 0 refuted. 0 times theorem prover too weak. 1722 trivial. 0 not checked. [2018-11-28 13:27:42,780 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 13:27:42,780 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2018-11-28 13:27:42,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-11-28 13:27:42,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-11-28 13:27:42,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-11-28 13:27:42,781 INFO L87 Difference]: Start difference. First operand 212 states and 213 transitions. Second operand 52 states. [2018-11-28 13:27:42,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:27:42,910 INFO L93 Difference]: Finished difference Result 212 states and 213 transitions. [2018-11-28 13:27:42,911 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-11-28 13:27:42,912 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 211 [2018-11-28 13:27:42,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:27:42,912 INFO L225 Difference]: With dead ends: 212 [2018-11-28 13:27:42,912 INFO L226 Difference]: Without dead ends: 0 [2018-11-28 13:27:42,913 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-11-28 13:27:42,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-28 13:27:42,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-28 13:27:42,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-28 13:27:42,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-28 13:27:42,913 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 211 [2018-11-28 13:27:42,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:27:42,913 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-28 13:27:42,913 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-11-28 13:27:42,913 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-28 13:27:42,914 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-28 13:27:42,917 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-28 13:27:43,743 WARN L180 SmtUtils]: Spent 689.00 ms on a formula simplification. DAG size of input: 307 DAG size of output: 307 [2018-11-28 13:27:43,757 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2018-11-28 13:27:43,757 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2018-11-28 13:27:43,757 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-28 13:27:43,757 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-28 13:27:43,757 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-28 13:27:43,758 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-28 13:27:43,758 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-28 13:27:43,758 INFO L448 ceAbstractionStarter]: For program point L89(lines 89 98) no Hoare annotation was computed. [2018-11-28 13:27:43,758 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 8 209) no Hoare annotation was computed. [2018-11-28 13:27:43,758 INFO L448 ceAbstractionStarter]: For program point L56(lines 56 119) no Hoare annotation was computed. [2018-11-28 13:27:43,758 INFO L444 ceAbstractionStarter]: At program point L118(lines 56 119) the Hoare annotation is: (and (<= main_~main__y~0 50) (<= main_~main__x~0 8) (<= 50 main_~main__y~0)) [2018-11-28 13:27:43,758 INFO L448 ceAbstractionStarter]: For program point L44(lines 44 143) no Hoare annotation was computed. [2018-11-28 13:27:43,759 INFO L444 ceAbstractionStarter]: At program point L106(lines 62 107) the Hoare annotation is: (or (and (<= 56 main_~main__x~0) (<= main_~main__y~0 56) (<= main_~main__x~0 56) (<= 56 main_~main__y~0)) (and (<= 61 main_~main__y~0) (<= 61 main_~main__x~0) (<= main_~main__y~0 61) (<= main_~main__x~0 61)) (and (<= main_~main__x~0 91) (<= 91 main_~main__x~0) (<= main_~main__y~0 91) (<= 91 main_~main__y~0)) (and (<= 57 main_~main__y~0) (<= main_~main__y~0 57) (<= 57 main_~main__x~0) (<= main_~main__x~0 57)) (and (<= 59 main_~main__x~0) (<= main_~main__y~0 59) (<= main_~main__x~0 59) (<= 59 main_~main__y~0)) (and (<= main_~main__y~0 74) (<= 74 main_~main__y~0) (<= main_~main__x~0 74) (<= 74 main_~main__x~0)) (and (<= 75 main_~main__y~0) (<= main_~main__x~0 75) (<= 75 main_~main__x~0) (<= main_~main__y~0 75)) (and (<= main_~main__x~0 58) (<= main_~main__y~0 58) (<= 58 main_~main__x~0) (<= 58 main_~main__y~0)) (and (<= 72 main_~main__x~0) (<= main_~main__y~0 72) (<= 72 main_~main__y~0) (<= main_~main__x~0 72)) (and (<= main_~main__x~0 82) (<= 82 main_~main__x~0) (<= main_~main__y~0 82) (<= 82 main_~main__y~0)) (and (<= main_~main__y~0 64) (<= main_~main__x~0 64) (<= 64 main_~main__x~0) (<= 64 main_~main__y~0)) (and (<= main_~main__y~0 53) (<= 53 main_~main__y~0) (<= main_~main__x~0 53) (<= 53 main_~main__x~0)) (and (<= 89 main_~main__y~0) (<= main_~main__y~0 89) (<= main_~main__x~0 89) (<= 89 main_~main__x~0)) (and (<= main_~main__y~0 90) (<= 90 main_~main__y~0) (<= 90 main_~main__x~0) (<= main_~main__x~0 90)) (and (<= 87 main_~main__x~0) (<= main_~main__y~0 87) (<= main_~main__x~0 87) (<= 87 main_~main__y~0)) (and (<= main_~main__x~0 78) (<= main_~main__y~0 78) (<= 78 main_~main__x~0) (<= 78 main_~main__y~0)) (and (<= main_~main__x~0 95) (<= main_~main__y~0 95) (<= 95 main_~main__x~0) (<= 95 main_~main__y~0)) (and (<= main_~main__y~0 77) (<= 77 main_~main__y~0) (<= main_~main__x~0 77) (<= 77 main_~main__x~0)) (and (<= 55 main_~main__y~0) (<= main_~main__x~0 55) (<= main_~main__y~0 55) (<= 55 main_~main__x~0)) (and (<= 63 main_~main__x~0) (<= main_~main__y~0 63) (<= main_~main__x~0 63) (<= 63 main_~main__y~0)) (and (<= 76 main_~main__x~0) (<= main_~main__x~0 76) (<= main_~main__y~0 76) (<= 76 main_~main__y~0)) (and (<= main_~main__y~0 100) (<= 100 main_~main__x~0) (<= 100 main_~main__y~0)) (and (<= 79 main_~main__x~0) (<= 79 main_~main__y~0) (<= main_~main__x~0 79) (<= main_~main__y~0 79)) (and (<= main_~main__x~0 80) (<= main_~main__y~0 80) (<= 80 main_~main__x~0) (<= 80 main_~main__y~0)) (and (<= main_~main__y~0 54) (<= 54 main_~main__y~0) (<= 54 main_~main__x~0) (<= main_~main__x~0 54)) (and (<= main_~main__x~0 73) (<= 73 main_~main__x~0) (<= main_~main__y~0 73) (<= 73 main_~main__y~0)) (and (<= main_~main__x~0 52) (<= main_~main__y~0 52) (<= 52 main_~main__y~0) (<= 52 main_~main__x~0)) (and (<= main_~main__x~0 93) (<= main_~main__y~0 93) (<= 93 main_~main__y~0) (<= 93 main_~main__x~0)) (and (<= main_~main__y~0 97) (<= 97 main_~main__x~0) (<= 97 main_~main__y~0) (<= main_~main__x~0 97)) (and (<= main_~main__x~0 94) (<= 94 main_~main__x~0) (<= main_~main__y~0 94) (<= 94 main_~main__y~0)) (and (<= 70 main_~main__x~0) (<= main_~main__y~0 70) (<= main_~main__x~0 70) (<= 70 main_~main__y~0)) (and (<= main_~main__y~0 65) (<= 65 main_~main__y~0) (<= main_~main__x~0 65) (<= 65 main_~main__x~0)) (and (<= main_~main__y~0 84) (<= 84 main_~main__y~0) (<= 84 main_~main__x~0) (<= main_~main__x~0 84)) (and (<= main_~main__x~0 66) (<= main_~main__y~0 66) (<= 66 main_~main__y~0) (<= 66 main_~main__x~0)) (and (<= main_~main__x~0 60) (<= 60 main_~main__x~0) (<= 60 main_~main__y~0) (<= main_~main__y~0 60)) (and (<= main_~main__x~0 69) (<= main_~main__y~0 69) (<= 69 main_~main__y~0) (<= 69 main_~main__x~0)) (and (<= main_~main__y~0 71) (<= 71 main_~main__y~0) (<= 71 main_~main__x~0) (<= main_~main__x~0 71)) (and (<= main_~main__y~0 50) (<= 50 main_~main__y~0) (<= main_~main__x~0 50)) (and (<= 62 main_~main__y~0) (<= main_~main__y~0 62) (<= 62 main_~main__x~0) (<= main_~main__x~0 62)) (and (<= main_~main__y~0 68) (<= 68 main_~main__x~0) (<= main_~main__x~0 68) (<= 68 main_~main__y~0)) (and (<= main_~main__x~0 99) (<= 99 main_~main__x~0) (<= main_~main__y~0 99) (<= 99 main_~main__y~0)) (and (<= main_~main__x~0 81) (<= main_~main__y~0 81) (<= 81 main_~main__x~0) (<= 81 main_~main__y~0)) (and (<= main_~main__x~0 96) (<= main_~main__y~0 96) (<= 96 main_~main__y~0) (<= 96 main_~main__x~0)) (and (<= main_~main__y~0 98) (<= 98 main_~main__y~0) (<= main_~main__x~0 98) (<= 98 main_~main__x~0)) (and (<= 86 main_~main__x~0) (<= main_~main__x~0 86) (<= main_~main__y~0 86) (<= 86 main_~main__y~0)) (and (<= 51 main_~main__y~0) (<= main_~main__x~0 51) (<= 51 main_~main__x~0) (<= main_~main__y~0 51)) (and (<= 85 main_~main__y~0) (<= main_~main__x~0 85) (<= 85 main_~main__x~0) (<= main_~main__y~0 85)) (and (<= main_~main__x~0 92) (<= 92 main_~main__x~0) (<= main_~main__y~0 92) (<= 92 main_~main__y~0)) (and (<= main_~main__x~0 67) (<= 67 main_~main__x~0) (<= main_~main__y~0 67) (<= 67 main_~main__y~0)) (and (<= main_~main__x~0 88) (<= 88 main_~main__x~0) (<= main_~main__y~0 88) (<= 88 main_~main__y~0)) (and (<= main_~main__y~0 83) (<= main_~main__x~0 83) (<= 83 main_~main__x~0) (<= 83 main_~main__y~0))) [2018-11-28 13:27:43,759 INFO L448 ceAbstractionStarter]: For program point L69(lines 69 80) no Hoare annotation was computed. [2018-11-28 13:27:43,759 INFO L448 ceAbstractionStarter]: For program point L32(lines 32 167) no Hoare annotation was computed. [2018-11-28 13:27:43,759 INFO L448 ceAbstractionStarter]: For program point L20(lines 20 191) no Hoare annotation was computed. [2018-11-28 13:27:43,759 INFO L448 ceAbstractionStarter]: For program point L12(lines 12 208) no Hoare annotation was computed. [2018-11-28 13:27:43,760 INFO L444 ceAbstractionStarter]: At program point L202(lines 14 203) the Hoare annotation is: (and (<= main_~main__y~0 50) (<= 50 main_~main__y~0) (<= main_~main__x~0 1)) [2018-11-28 13:27:43,760 INFO L448 ceAbstractionStarter]: For program point L62(lines 62 107) no Hoare annotation was computed. [2018-11-28 13:27:43,760 INFO L444 ceAbstractionStarter]: At program point L190(lines 20 191) the Hoare annotation is: (and (<= main_~main__y~0 50) (<= 50 main_~main__y~0) (<= main_~main__x~0 2)) [2018-11-28 13:27:43,760 INFO L448 ceAbstractionStarter]: For program point L91(line 91) no Hoare annotation was computed. [2018-11-28 13:27:43,760 INFO L448 ceAbstractionStarter]: For program point L50(lines 50 131) no Hoare annotation was computed. [2018-11-28 13:27:43,760 INFO L444 ceAbstractionStarter]: At program point L178(lines 26 179) the Hoare annotation is: (and (<= main_~main__y~0 50) (<= 50 main_~main__y~0) (<= main_~main__x~0 3)) [2018-11-28 13:27:43,760 INFO L448 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 91) no Hoare annotation was computed. [2018-11-28 13:27:43,760 INFO L448 ceAbstractionStarter]: For program point mainFINAL(lines 8 209) no Hoare annotation was computed. [2018-11-28 13:27:43,760 INFO L448 ceAbstractionStarter]: For program point L38(lines 38 155) no Hoare annotation was computed. [2018-11-28 13:27:43,760 INFO L444 ceAbstractionStarter]: At program point L166(lines 32 167) the Hoare annotation is: (and (<= main_~main__x~0 4) (<= main_~main__y~0 50) (<= 50 main_~main__y~0)) [2018-11-28 13:27:43,760 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 8 209) the Hoare annotation is: true [2018-11-28 13:27:43,760 INFO L448 ceAbstractionStarter]: For program point L26(lines 26 179) no Hoare annotation was computed. [2018-11-28 13:27:43,761 INFO L444 ceAbstractionStarter]: At program point L154(lines 38 155) the Hoare annotation is: (and (<= main_~main__y~0 50) (<= main_~main__x~0 5) (<= 50 main_~main__y~0)) [2018-11-28 13:27:43,761 INFO L448 ceAbstractionStarter]: For program point L14(lines 14 203) no Hoare annotation was computed. [2018-11-28 13:27:43,761 INFO L444 ceAbstractionStarter]: At program point L142(lines 44 143) the Hoare annotation is: (and (<= main_~main__y~0 50) (<= 50 main_~main__y~0) (<= main_~main__x~0 6)) [2018-11-28 13:27:43,761 INFO L444 ceAbstractionStarter]: At program point L130(lines 50 131) the Hoare annotation is: (and (<= main_~main__y~0 50) (<= main_~main__x~0 7) (<= 50 main_~main__y~0)) [2018-11-28 13:27:43,783 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 01:27:43 BoogieIcfgContainer [2018-11-28 13:27:43,783 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-28 13:27:43,783 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-28 13:27:43,783 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-28 13:27:43,783 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-28 13:27:43,784 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 01:27:02" (3/4) ... [2018-11-28 13:27:43,790 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-28 13:27:43,796 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-28 13:27:43,796 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-28 13:27:43,801 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2018-11-28 13:27:43,802 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2018-11-28 13:27:43,846 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_395668a8-7bae-439b-b95c-847034e99bff/bin-2019/uautomizer/witness.graphml [2018-11-28 13:27:43,846 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-28 13:27:43,847 INFO L168 Benchmark]: Toolchain (without parser) took 42049.82 ms. Allocated memory was 1.0 GB in the beginning and 1.7 GB in the end (delta: 717.2 MB). Free memory was 957.6 MB in the beginning and 1.1 GB in the end (delta: -98.3 MB). Peak memory consumption was 618.9 MB. Max. memory is 11.5 GB. [2018-11-28 13:27:43,848 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 985.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 13:27:43,848 INFO L168 Benchmark]: CACSL2BoogieTranslator took 147.74 ms. Allocated memory is still 1.0 GB. Free memory was 957.6 MB in the beginning and 946.8 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-28 13:27:43,848 INFO L168 Benchmark]: Boogie Procedure Inliner took 14.26 ms. Allocated memory is still 1.0 GB. Free memory was 946.8 MB in the beginning and 944.1 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-28 13:27:43,848 INFO L168 Benchmark]: Boogie Preprocessor took 15.81 ms. Allocated memory is still 1.0 GB. Free memory is still 944.1 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 13:27:43,848 INFO L168 Benchmark]: RCFGBuilder took 242.46 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 154.1 MB). Free memory was 944.1 MB in the beginning and 1.1 GB in the end (delta: -184.0 MB). Peak memory consumption was 13.4 MB. Max. memory is 11.5 GB. [2018-11-28 13:27:43,849 INFO L168 Benchmark]: TraceAbstraction took 41563.01 ms. Allocated memory was 1.2 GB in the beginning and 1.7 GB in the end (delta: 563.1 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 51.6 MB). Peak memory consumption was 614.7 MB. Max. memory is 11.5 GB. [2018-11-28 13:27:43,849 INFO L168 Benchmark]: Witness Printer took 63.20 ms. Allocated memory is still 1.7 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 17.3 MB). Peak memory consumption was 17.3 MB. Max. memory is 11.5 GB. [2018-11-28 13:27:43,851 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 985.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 147.74 ms. Allocated memory is still 1.0 GB. Free memory was 957.6 MB in the beginning and 946.8 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 14.26 ms. Allocated memory is still 1.0 GB. Free memory was 946.8 MB in the beginning and 944.1 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 15.81 ms. Allocated memory is still 1.0 GB. Free memory is still 944.1 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 242.46 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 154.1 MB). Free memory was 944.1 MB in the beginning and 1.1 GB in the end (delta: -184.0 MB). Peak memory consumption was 13.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 41563.01 ms. Allocated memory was 1.2 GB in the beginning and 1.7 GB in the end (delta: 563.1 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 51.6 MB). Peak memory consumption was 614.7 MB. Max. memory is 11.5 GB. * Witness Printer took 63.20 ms. Allocated memory is still 1.7 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 17.3 MB). Peak memory consumption was 17.3 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 91]: 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 - InvariantResult [Line: 32]: Loop Invariant Derived loop invariant: (main__x <= 4 && main__y <= 50) && 50 <= main__y - InvariantResult [Line: 56]: Loop Invariant Derived loop invariant: (main__y <= 50 && main__x <= 8) && 50 <= main__y - InvariantResult [Line: 26]: Loop Invariant Derived loop invariant: (main__y <= 50 && 50 <= main__y) && main__x <= 3 - InvariantResult [Line: 50]: Loop Invariant Derived loop invariant: (main__y <= 50 && main__x <= 7) && 50 <= main__y - InvariantResult [Line: 20]: Loop Invariant Derived loop invariant: (main__y <= 50 && 50 <= main__y) && main__x <= 2 - InvariantResult [Line: 44]: Loop Invariant Derived loop invariant: (main__y <= 50 && 50 <= main__y) && main__x <= 6 - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: (main__y <= 50 && 50 <= main__y) && main__x <= 1 - InvariantResult [Line: 38]: Loop Invariant Derived loop invariant: (main__y <= 50 && main__x <= 5) && 50 <= main__y - InvariantResult [Line: 62]: Loop Invariant Derived loop invariant: ((((((((((((((((((((((((((((((((((((((((((((((((((((56 <= main__x && main__y <= 56) && main__x <= 56) && 56 <= main__y) || (((61 <= main__y && 61 <= main__x) && main__y <= 61) && main__x <= 61)) || (((main__x <= 91 && 91 <= main__x) && main__y <= 91) && 91 <= main__y)) || (((57 <= main__y && main__y <= 57) && 57 <= main__x) && main__x <= 57)) || (((59 <= main__x && main__y <= 59) && main__x <= 59) && 59 <= main__y)) || (((main__y <= 74 && 74 <= main__y) && main__x <= 74) && 74 <= main__x)) || (((75 <= main__y && main__x <= 75) && 75 <= main__x) && main__y <= 75)) || (((main__x <= 58 && main__y <= 58) && 58 <= main__x) && 58 <= main__y)) || (((72 <= main__x && main__y <= 72) && 72 <= main__y) && main__x <= 72)) || (((main__x <= 82 && 82 <= main__x) && main__y <= 82) && 82 <= main__y)) || (((main__y <= 64 && main__x <= 64) && 64 <= main__x) && 64 <= main__y)) || (((main__y <= 53 && 53 <= main__y) && main__x <= 53) && 53 <= main__x)) || (((89 <= main__y && main__y <= 89) && main__x <= 89) && 89 <= main__x)) || (((main__y <= 90 && 90 <= main__y) && 90 <= main__x) && main__x <= 90)) || (((87 <= main__x && main__y <= 87) && main__x <= 87) && 87 <= main__y)) || (((main__x <= 78 && main__y <= 78) && 78 <= main__x) && 78 <= main__y)) || (((main__x <= 95 && main__y <= 95) && 95 <= main__x) && 95 <= main__y)) || (((main__y <= 77 && 77 <= main__y) && main__x <= 77) && 77 <= main__x)) || (((55 <= main__y && main__x <= 55) && main__y <= 55) && 55 <= main__x)) || (((63 <= main__x && main__y <= 63) && main__x <= 63) && 63 <= main__y)) || (((76 <= main__x && main__x <= 76) && main__y <= 76) && 76 <= main__y)) || ((main__y <= 100 && 100 <= main__x) && 100 <= main__y)) || (((79 <= main__x && 79 <= main__y) && main__x <= 79) && main__y <= 79)) || (((main__x <= 80 && main__y <= 80) && 80 <= main__x) && 80 <= main__y)) || (((main__y <= 54 && 54 <= main__y) && 54 <= main__x) && main__x <= 54)) || (((main__x <= 73 && 73 <= main__x) && main__y <= 73) && 73 <= main__y)) || (((main__x <= 52 && main__y <= 52) && 52 <= main__y) && 52 <= main__x)) || (((main__x <= 93 && main__y <= 93) && 93 <= main__y) && 93 <= main__x)) || (((main__y <= 97 && 97 <= main__x) && 97 <= main__y) && main__x <= 97)) || (((main__x <= 94 && 94 <= main__x) && main__y <= 94) && 94 <= main__y)) || (((70 <= main__x && main__y <= 70) && main__x <= 70) && 70 <= main__y)) || (((main__y <= 65 && 65 <= main__y) && main__x <= 65) && 65 <= main__x)) || (((main__y <= 84 && 84 <= main__y) && 84 <= main__x) && main__x <= 84)) || (((main__x <= 66 && main__y <= 66) && 66 <= main__y) && 66 <= main__x)) || (((main__x <= 60 && 60 <= main__x) && 60 <= main__y) && main__y <= 60)) || (((main__x <= 69 && main__y <= 69) && 69 <= main__y) && 69 <= main__x)) || (((main__y <= 71 && 71 <= main__y) && 71 <= main__x) && main__x <= 71)) || ((main__y <= 50 && 50 <= main__y) && main__x <= 50)) || (((62 <= main__y && main__y <= 62) && 62 <= main__x) && main__x <= 62)) || (((main__y <= 68 && 68 <= main__x) && main__x <= 68) && 68 <= main__y)) || (((main__x <= 99 && 99 <= main__x) && main__y <= 99) && 99 <= main__y)) || (((main__x <= 81 && main__y <= 81) && 81 <= main__x) && 81 <= main__y)) || (((main__x <= 96 && main__y <= 96) && 96 <= main__y) && 96 <= main__x)) || (((main__y <= 98 && 98 <= main__y) && main__x <= 98) && 98 <= main__x)) || (((86 <= main__x && main__x <= 86) && main__y <= 86) && 86 <= main__y)) || (((51 <= main__y && main__x <= 51) && 51 <= main__x) && main__y <= 51)) || (((85 <= main__y && main__x <= 85) && 85 <= main__x) && main__y <= 85)) || (((main__x <= 92 && 92 <= main__x) && main__y <= 92) && 92 <= main__y)) || (((main__x <= 67 && 67 <= main__x) && main__y <= 67) && 67 <= main__y)) || (((main__x <= 88 && 88 <= main__x) && main__y <= 88) && 88 <= main__y)) || (((main__y <= 83 && main__x <= 83) && 83 <= main__x) && 83 <= main__y) - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 33 locations, 1 error locations. SAFE Result, 41.4s OverallTime, 54 OverallIterations, 92 TraceHistogramMax, 7.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.8s HoareAnnotationTime, HoareTripleCheckerStatistics: 666 SDtfs, 2024 SDslu, 9243 SDs, 0 SdLazy, 13324 SolverSat, 2190 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7552 GetRequests, 5371 SyntacticMatches, 1 SemanticMatches, 2180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18400 ImplicationChecksByTransitivity, 27.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=212occurred in iteration=53, 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: 0.2s AutomataMinimizationTime, 54 MinimizatonAttempts, 20 StatesRemovedByMinimization, 20 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 13 LocationsWithAnnotation, 13 PreInvPairs, 113 NumberOfFragments, 742 HoareAnnotationTreeSize, 13 FomulaSimplifications, 533 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 13 FomulaSimplificationsInter, 171 FormulaSimplificationTreeSizeReductionInter, 0.7s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 2.0s SatisfiabilityAnalysisTime, 29.2s InterpolantComputationTime, 12206 NumberOfCodeBlocks, 12146 NumberOfCodeBlocksAsserted, 1208 NumberOfCheckSat, 12106 ConstructedInterpolants, 0 QuantifiedInterpolants, 4099036 SizeOfPredicates, 23 NumberOfNonLiveVariables, 14904 ConjunctsInSsa, 1753 ConjunctsInUnsatCore, 100 InterpolantComputations, 8 PerfectInterpolantSequences, 200593/303161 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...