./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/loop-lit/gr2006_true-unreach-call_true-termination.c.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 1dbac8bc Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_1b3549e1-c80d-4ae0-9afa-bbf10ee374b7/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_1b3549e1-c80d-4ae0-9afa-bbf10ee374b7/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_1b3549e1-c80d-4ae0-9afa-bbf10ee374b7/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_1b3549e1-c80d-4ae0-9afa-bbf10ee374b7/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-lit/gr2006_true-unreach-call_true-termination.c.i -s /tmp/vcloud-vcloud-master/worker/working_dir_1b3549e1-c80d-4ae0-9afa-bbf10ee374b7/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_1b3549e1-c80d-4ae0-9afa-bbf10ee374b7/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 76260ed82768318ee6f3ac3cb9cfff5a60080963 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-1dbac8b [2018-11-10 03:26:23,284 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-10 03:26:23,285 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-10 03:26:23,292 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-10 03:26:23,292 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-10 03:26:23,293 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-10 03:26:23,294 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-10 03:26:23,295 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-10 03:26:23,296 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-10 03:26:23,296 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-10 03:26:23,297 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-10 03:26:23,297 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-10 03:26:23,298 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-10 03:26:23,298 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-10 03:26:23,299 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-10 03:26:23,300 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-10 03:26:23,300 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-10 03:26:23,301 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-10 03:26:23,303 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-10 03:26:23,304 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-10 03:26:23,304 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-10 03:26:23,305 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-10 03:26:23,307 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-10 03:26:23,307 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-10 03:26:23,307 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-10 03:26:23,307 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-10 03:26:23,308 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-10 03:26:23,309 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-10 03:26:23,309 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-10 03:26:23,310 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-10 03:26:23,310 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-10 03:26:23,311 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-10 03:26:23,311 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-10 03:26:23,311 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-10 03:26:23,311 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-10 03:26:23,312 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-10 03:26:23,312 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_1b3549e1-c80d-4ae0-9afa-bbf10ee374b7/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-11-10 03:26:23,321 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-10 03:26:23,321 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-10 03:26:23,322 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-10 03:26:23,322 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-11-10 03:26:23,322 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-10 03:26:23,322 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-10 03:26:23,322 INFO L133 SettingsManager]: * Use SBE=true [2018-11-10 03:26:23,323 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-10 03:26:23,323 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-10 03:26:23,323 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-10 03:26:23,323 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-10 03:26:23,323 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-10 03:26:23,323 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-10 03:26:23,323 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-10 03:26:23,323 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-10 03:26:23,324 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-10 03:26:23,324 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-10 03:26:23,324 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-10 03:26:23,324 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-10 03:26:23,324 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-10 03:26:23,324 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-10 03:26:23,324 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-10 03:26:23,324 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-10 03:26:23,325 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-10 03:26:23,325 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-10 03:26:23,325 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-10 03:26:23,325 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-10 03:26:23,325 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-10 03:26:23,325 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-10 03:26:23,325 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_1b3549e1-c80d-4ae0-9afa-bbf10ee374b7/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 -> 76260ed82768318ee6f3ac3cb9cfff5a60080963 [2018-11-10 03:26:23,347 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-10 03:26:23,354 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-10 03:26:23,356 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-10 03:26:23,357 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-10 03:26:23,357 INFO L276 PluginConnector]: CDTParser initialized [2018-11-10 03:26:23,358 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_1b3549e1-c80d-4ae0-9afa-bbf10ee374b7/bin-2019/uautomizer/../../sv-benchmarks/c/loop-lit/gr2006_true-unreach-call_true-termination.c.i [2018-11-10 03:26:23,395 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_1b3549e1-c80d-4ae0-9afa-bbf10ee374b7/bin-2019/uautomizer/data/08c15059b/52c3722b994f4cce9136253fc8b8637f/FLAGa22d8d81d [2018-11-10 03:26:23,795 INFO L298 CDTParser]: Found 1 translation units. [2018-11-10 03:26:23,795 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_1b3549e1-c80d-4ae0-9afa-bbf10ee374b7/sv-benchmarks/c/loop-lit/gr2006_true-unreach-call_true-termination.c.i [2018-11-10 03:26:23,799 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_1b3549e1-c80d-4ae0-9afa-bbf10ee374b7/bin-2019/uautomizer/data/08c15059b/52c3722b994f4cce9136253fc8b8637f/FLAGa22d8d81d [2018-11-10 03:26:23,807 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_1b3549e1-c80d-4ae0-9afa-bbf10ee374b7/bin-2019/uautomizer/data/08c15059b/52c3722b994f4cce9136253fc8b8637f [2018-11-10 03:26:23,809 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-10 03:26:23,810 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-10 03:26:23,811 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-10 03:26:23,811 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-10 03:26:23,814 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-10 03:26:23,815 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 03:26:23" (1/1) ... [2018-11-10 03:26:23,817 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1cdce2a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 03:26:23, skipping insertion in model container [2018-11-10 03:26:23,817 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 03:26:23" (1/1) ... [2018-11-10 03:26:23,822 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-10 03:26:23,833 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-10 03:26:23,917 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 03:26:23,919 INFO L189 MainTranslator]: Completed pre-run [2018-11-10 03:26:23,928 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 03:26:23,937 INFO L193 MainTranslator]: Completed translation [2018-11-10 03:26:23,938 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 03:26:23 WrapperNode [2018-11-10 03:26:23,938 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-10 03:26:23,938 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-10 03:26:23,938 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-10 03:26:23,939 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-10 03:26:23,949 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 03:26:23" (1/1) ... [2018-11-10 03:26:23,949 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 03:26:23" (1/1) ... [2018-11-10 03:26:23,953 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 03:26:23" (1/1) ... [2018-11-10 03:26:23,953 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 03:26:23" (1/1) ... [2018-11-10 03:26:23,955 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 03:26:23" (1/1) ... [2018-11-10 03:26:23,958 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 03:26:23" (1/1) ... [2018-11-10 03:26:23,959 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 03:26:23" (1/1) ... [2018-11-10 03:26:23,960 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-10 03:26:23,960 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-10 03:26:23,960 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-10 03:26:23,960 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-10 03:26:23,961 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 03:26:23" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1b3549e1-c80d-4ae0-9afa-bbf10ee374b7/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 [2018-11-10 03:26:24,043 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-10 03:26:24,043 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-10 03:26:24,043 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-11-10 03:26:24,044 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-10 03:26:24,044 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-11-10 03:26:24,044 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2018-11-10 03:26:24,044 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-11-10 03:26:24,044 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-11-10 03:26:24,044 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-10 03:26:24,044 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-10 03:26:24,044 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-10 03:26:24,146 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-10 03:26:24,146 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 03:26:24 BoogieIcfgContainer [2018-11-10 03:26:24,146 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-10 03:26:24,147 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-10 03:26:24,147 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-10 03:26:24,149 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-10 03:26:24,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 03:26:23" (1/3) ... [2018-11-10 03:26:24,150 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ddedfbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 03:26:24, skipping insertion in model container [2018-11-10 03:26:24,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 03:26:23" (2/3) ... [2018-11-10 03:26:24,151 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ddedfbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 03:26:24, skipping insertion in model container [2018-11-10 03:26:24,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 03:26:24" (3/3) ... [2018-11-10 03:26:24,153 INFO L112 eAbstractionObserver]: Analyzing ICFG gr2006_true-unreach-call_true-termination.c.i [2018-11-10 03:26:24,161 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-10 03:26:24,167 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-10 03:26:24,180 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-10 03:26:24,205 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-11-10 03:26:24,205 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-10 03:26:24,205 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-10 03:26:24,205 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-10 03:26:24,206 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-10 03:26:24,206 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-10 03:26:24,206 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-10 03:26:24,206 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-10 03:26:24,206 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-10 03:26:24,220 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2018-11-10 03:26:24,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-11-10 03:26:24,224 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 03:26:24,225 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 03:26:24,227 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 03:26:24,231 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 03:26:24,232 INFO L82 PathProgramCache]: Analyzing trace with hash -859010367, now seen corresponding path program 1 times [2018-11-10 03:26:24,233 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 03:26:24,234 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 03:26:24,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:24,274 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 03:26:24,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:24,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:26:24,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 03:26:24,320 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 03:26:24,320 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-10 03:26:24,324 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-10 03:26:24,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-10 03:26:24,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-10 03:26:24,337 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2018-11-10 03:26:24,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 03:26:24,350 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2018-11-10 03:26:24,350 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-10 03:26:24,351 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2018-11-10 03:26:24,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 03:26:24,358 INFO L225 Difference]: With dead ends: 33 [2018-11-10 03:26:24,358 INFO L226 Difference]: Without dead ends: 14 [2018-11-10 03:26:24,360 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-10 03:26:24,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-11-10 03:26:24,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-11-10 03:26:24,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-11-10 03:26:24,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2018-11-10 03:26:24,382 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2018-11-10 03:26:24,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 03:26:24,382 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2018-11-10 03:26:24,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-10 03:26:24,382 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2018-11-10 03:26:24,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-10 03:26:24,383 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 03:26:24,383 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 03:26:24,383 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 03:26:24,383 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 03:26:24,383 INFO L82 PathProgramCache]: Analyzing trace with hash 220608140, now seen corresponding path program 1 times [2018-11-10 03:26:24,383 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 03:26:24,384 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 03:26:24,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:24,384 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 03:26:24,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:24,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:26:24,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 03:26:24,418 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 03:26:24,418 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-10 03:26:24,419 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-10 03:26:24,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-10 03:26:24,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-10 03:26:24,420 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 4 states. [2018-11-10 03:26:24,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 03:26:24,449 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2018-11-10 03:26:24,450 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-10 03:26:24,450 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2018-11-10 03:26:24,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 03:26:24,450 INFO L225 Difference]: With dead ends: 24 [2018-11-10 03:26:24,450 INFO L226 Difference]: Without dead ends: 19 [2018-11-10 03:26:24,451 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-10 03:26:24,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-11-10 03:26:24,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-11-10 03:26:24,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-11-10 03:26:24,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2018-11-10 03:26:24,454 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 13 [2018-11-10 03:26:24,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 03:26:24,454 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2018-11-10 03:26:24,454 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-10 03:26:24,454 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2018-11-10 03:26:24,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-10 03:26:24,455 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 03:26:24,455 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 03:26:24,455 INFO L424 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 03:26:24,455 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 03:26:24,455 INFO L82 PathProgramCache]: Analyzing trace with hash 277866442, now seen corresponding path program 1 times [2018-11-10 03:26:24,455 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 03:26:24,455 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 03:26:24,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:24,456 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 03:26:24,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:24,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:26:24,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 03:26:24,466 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 03:26:24,466 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-10 03:26:24,467 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-10 03:26:24,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-10 03:26:24,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-10 03:26:24,467 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 3 states. [2018-11-10 03:26:24,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 03:26:24,478 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2018-11-10 03:26:24,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-10 03:26:24,478 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2018-11-10 03:26:24,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 03:26:24,479 INFO L225 Difference]: With dead ends: 37 [2018-11-10 03:26:24,479 INFO L226 Difference]: Without dead ends: 23 [2018-11-10 03:26:24,479 INFO L605 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 [2018-11-10 03:26:24,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-11-10 03:26:24,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2018-11-10 03:26:24,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-11-10 03:26:24,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2018-11-10 03:26:24,483 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 13 [2018-11-10 03:26:24,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 03:26:24,483 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2018-11-10 03:26:24,483 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-10 03:26:24,483 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2018-11-10 03:26:24,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-11-10 03:26:24,484 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 03:26:24,484 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 03:26:24,484 INFO L424 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 03:26:24,484 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 03:26:24,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1383636324, now seen corresponding path program 1 times [2018-11-10 03:26:24,484 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 03:26:24,485 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 03:26:24,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:24,485 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 03:26:24,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:24,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:26:24,526 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-10 03:26:24,526 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 03:26:24,527 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1b3549e1-c80d-4ae0-9afa-bbf10ee374b7/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 [2018-11-10 03:26:24,544 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 03:26:24,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:26:24,563 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 03:26:24,575 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-10 03:26:24,591 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 03:26:24,591 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-11-10 03:26:24,591 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-10 03:26:24,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-10 03:26:24,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-10 03:26:24,592 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 4 states. [2018-11-10 03:26:24,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 03:26:24,610 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2018-11-10 03:26:24,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-10 03:26:24,610 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2018-11-10 03:26:24,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 03:26:24,611 INFO L225 Difference]: With dead ends: 41 [2018-11-10 03:26:24,611 INFO L226 Difference]: Without dead ends: 27 [2018-11-10 03:26:24,611 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-10 03:26:24,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-11-10 03:26:24,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2018-11-10 03:26:24,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-11-10 03:26:24,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2018-11-10 03:26:24,614 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 21 [2018-11-10 03:26:24,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 03:26:24,614 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2018-11-10 03:26:24,614 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-10 03:26:24,615 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2018-11-10 03:26:24,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-11-10 03:26:24,615 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 03:26:24,615 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 03:26:24,615 INFO L424 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 03:26:24,615 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 03:26:24,616 INFO L82 PathProgramCache]: Analyzing trace with hash -1112171374, now seen corresponding path program 2 times [2018-11-10 03:26:24,616 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 03:26:24,616 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 03:26:24,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:24,616 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 03:26:24,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:24,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:26:24,671 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-10 03:26:24,672 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 03:26:24,672 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1b3549e1-c80d-4ae0-9afa-bbf10ee374b7/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 [2018-11-10 03:26:24,681 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-10 03:26:24,696 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-10 03:26:24,697 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 03:26:24,698 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 03:26:24,703 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-10 03:26:24,721 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 03:26:24,721 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-11-10 03:26:24,722 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-10 03:26:24,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-10 03:26:24,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-11-10 03:26:24,722 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 5 states. [2018-11-10 03:26:24,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 03:26:24,767 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2018-11-10 03:26:24,769 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-10 03:26:24,769 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2018-11-10 03:26:24,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 03:26:24,770 INFO L225 Difference]: With dead ends: 45 [2018-11-10 03:26:24,770 INFO L226 Difference]: Without dead ends: 31 [2018-11-10 03:26:24,770 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-11-10 03:26:24,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-11-10 03:26:24,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2018-11-10 03:26:24,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-11-10 03:26:24,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2018-11-10 03:26:24,775 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 25 [2018-11-10 03:26:24,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 03:26:24,776 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2018-11-10 03:26:24,776 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-10 03:26:24,776 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2018-11-10 03:26:24,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-11-10 03:26:24,777 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 03:26:24,777 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 03:26:24,777 INFO L424 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 03:26:24,777 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 03:26:24,777 INFO L82 PathProgramCache]: Analyzing trace with hash 920868032, now seen corresponding path program 3 times [2018-11-10 03:26:24,777 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 03:26:24,778 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 03:26:24,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:24,778 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 03:26:24,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:24,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:26:24,841 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 18 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-10 03:26:24,841 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 03:26:24,841 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1b3549e1-c80d-4ae0-9afa-bbf10ee374b7/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 [2018-11-10 03:26:24,847 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-10 03:26:24,857 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-11-10 03:26:24,857 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 03:26:24,859 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 03:26:24,864 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 18 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-10 03:26:24,886 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 03:26:24,886 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-11-10 03:26:24,886 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-10 03:26:24,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-10 03:26:24,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-11-10 03:26:24,887 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 6 states. [2018-11-10 03:26:24,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 03:26:24,910 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2018-11-10 03:26:24,911 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-10 03:26:24,911 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2018-11-10 03:26:24,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 03:26:24,911 INFO L225 Difference]: With dead ends: 49 [2018-11-10 03:26:24,912 INFO L226 Difference]: Without dead ends: 35 [2018-11-10 03:26:24,912 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-11-10 03:26:24,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-11-10 03:26:24,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2018-11-10 03:26:24,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-11-10 03:26:24,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2018-11-10 03:26:24,916 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 29 [2018-11-10 03:26:24,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 03:26:24,916 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2018-11-10 03:26:24,916 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-10 03:26:24,916 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2018-11-10 03:26:24,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-11-10 03:26:24,920 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 03:26:24,920 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 03:26:24,920 INFO L424 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 03:26:24,920 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 03:26:24,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1962755566, now seen corresponding path program 4 times [2018-11-10 03:26:24,920 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 03:26:24,920 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 03:26:24,921 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:24,921 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 03:26:24,921 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:24,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:26:24,971 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 23 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-10 03:26:24,972 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 03:26:24,972 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1b3549e1-c80d-4ae0-9afa-bbf10ee374b7/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 [2018-11-10 03:26:24,980 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-10 03:26:24,988 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-10 03:26:24,988 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 03:26:24,989 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 03:26:24,994 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 23 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-10 03:26:25,012 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 03:26:25,012 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-11-10 03:26:25,012 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-10 03:26:25,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-10 03:26:25,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-11-10 03:26:25,013 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 7 states. [2018-11-10 03:26:25,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 03:26:25,034 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2018-11-10 03:26:25,034 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-10 03:26:25,034 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 33 [2018-11-10 03:26:25,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 03:26:25,035 INFO L225 Difference]: With dead ends: 53 [2018-11-10 03:26:25,035 INFO L226 Difference]: Without dead ends: 39 [2018-11-10 03:26:25,036 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-11-10 03:26:25,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-11-10 03:26:25,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2018-11-10 03:26:25,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-11-10 03:26:25,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2018-11-10 03:26:25,040 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 33 [2018-11-10 03:26:25,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 03:26:25,040 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2018-11-10 03:26:25,040 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-10 03:26:25,040 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2018-11-10 03:26:25,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-11-10 03:26:25,041 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 03:26:25,041 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 03:26:25,041 INFO L424 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 03:26:25,041 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 03:26:25,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1161752604, now seen corresponding path program 5 times [2018-11-10 03:26:25,041 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 03:26:25,041 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 03:26:25,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:25,042 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 03:26:25,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:25,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:26:25,098 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 28 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-10 03:26:25,099 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 03:26:25,099 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1b3549e1-c80d-4ae0-9afa-bbf10ee374b7/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 [2018-11-10 03:26:25,106 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-10 03:26:25,129 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-11-10 03:26:25,129 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 03:26:25,130 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 03:26:25,137 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 28 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-10 03:26:25,153 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 03:26:25,154 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-11-10 03:26:25,154 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-10 03:26:25,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-10 03:26:25,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-11-10 03:26:25,154 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 8 states. [2018-11-10 03:26:25,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 03:26:25,172 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2018-11-10 03:26:25,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-10 03:26:25,172 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 37 [2018-11-10 03:26:25,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 03:26:25,173 INFO L225 Difference]: With dead ends: 57 [2018-11-10 03:26:25,173 INFO L226 Difference]: Without dead ends: 43 [2018-11-10 03:26:25,174 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-11-10 03:26:25,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-11-10 03:26:25,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2018-11-10 03:26:25,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-11-10 03:26:25,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2018-11-10 03:26:25,177 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 37 [2018-11-10 03:26:25,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 03:26:25,178 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2018-11-10 03:26:25,178 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-10 03:26:25,178 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2018-11-10 03:26:25,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-11-10 03:26:25,179 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 03:26:25,179 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 03:26:25,179 INFO L424 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 03:26:25,179 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 03:26:25,179 INFO L82 PathProgramCache]: Analyzing trace with hash 1797509962, now seen corresponding path program 6 times [2018-11-10 03:26:25,180 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 03:26:25,180 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 03:26:25,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:25,180 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 03:26:25,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:25,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:26:25,266 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 33 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-10 03:26:25,266 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 03:26:25,266 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1b3549e1-c80d-4ae0-9afa-bbf10ee374b7/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 [2018-11-10 03:26:25,279 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-10 03:26:25,315 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-11-10 03:26:25,315 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 03:26:25,318 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 03:26:25,382 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 100 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-10 03:26:25,398 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 03:26:25,399 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2018-11-10 03:26:25,399 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-10 03:26:25,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-10 03:26:25,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2018-11-10 03:26:25,400 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 16 states. [2018-11-10 03:26:25,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 03:26:25,557 INFO L93 Difference]: Finished difference Result 106 states and 126 transitions. [2018-11-10 03:26:25,557 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-11-10 03:26:25,557 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 41 [2018-11-10 03:26:25,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 03:26:25,558 INFO L225 Difference]: With dead ends: 106 [2018-11-10 03:26:25,558 INFO L226 Difference]: Without dead ends: 92 [2018-11-10 03:26:25,559 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=219, Invalid=593, Unknown=0, NotChecked=0, Total=812 [2018-11-10 03:26:25,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-11-10 03:26:25,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 66. [2018-11-10 03:26:25,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-11-10 03:26:25,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 73 transitions. [2018-11-10 03:26:25,565 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 73 transitions. Word has length 41 [2018-11-10 03:26:25,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 03:26:25,566 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 73 transitions. [2018-11-10 03:26:25,566 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-10 03:26:25,566 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 73 transitions. [2018-11-10 03:26:25,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-11-10 03:26:25,567 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 03:26:25,567 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 13, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 03:26:25,567 INFO L424 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 03:26:25,567 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 03:26:25,568 INFO L82 PathProgramCache]: Analyzing trace with hash 710909332, now seen corresponding path program 7 times [2018-11-10 03:26:25,568 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 03:26:25,568 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 03:26:25,569 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:25,569 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 03:26:25,569 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:25,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:26:25,655 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 193 proven. 105 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2018-11-10 03:26:25,655 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 03:26:25,655 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1b3549e1-c80d-4ae0-9afa-bbf10ee374b7/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 [2018-11-10 03:26:25,661 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 03:26:25,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:26:25,681 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 03:26:25,693 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 193 proven. 105 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2018-11-10 03:26:25,709 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 03:26:25,709 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-11-10 03:26:25,710 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-10 03:26:25,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-10 03:26:25,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-11-10 03:26:25,710 INFO L87 Difference]: Start difference. First operand 66 states and 73 transitions. Second operand 10 states. [2018-11-10 03:26:25,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 03:26:25,734 INFO L93 Difference]: Finished difference Result 105 states and 120 transitions. [2018-11-10 03:26:25,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-10 03:26:25,734 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 65 [2018-11-10 03:26:25,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 03:26:25,735 INFO L225 Difference]: With dead ends: 105 [2018-11-10 03:26:25,735 INFO L226 Difference]: Without dead ends: 71 [2018-11-10 03:26:25,735 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-11-10 03:26:25,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-11-10 03:26:25,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2018-11-10 03:26:25,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-11-10 03:26:25,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 77 transitions. [2018-11-10 03:26:25,741 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 77 transitions. Word has length 65 [2018-11-10 03:26:25,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 03:26:25,742 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 77 transitions. [2018-11-10 03:26:25,742 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-10 03:26:25,742 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 77 transitions. [2018-11-10 03:26:25,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-11-10 03:26:25,743 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 03:26:25,743 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 14, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 03:26:25,743 INFO L424 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 03:26:25,743 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 03:26:25,743 INFO L82 PathProgramCache]: Analyzing trace with hash -1774383166, now seen corresponding path program 8 times [2018-11-10 03:26:25,743 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 03:26:25,744 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 03:26:25,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:25,744 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 03:26:25,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:25,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:26:25,807 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 218 proven. 136 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2018-11-10 03:26:25,807 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 03:26:25,807 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1b3549e1-c80d-4ae0-9afa-bbf10ee374b7/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 [2018-11-10 03:26:25,813 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-10 03:26:25,826 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-10 03:26:25,826 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 03:26:25,828 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 03:26:25,837 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 218 proven. 136 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2018-11-10 03:26:25,852 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 03:26:25,852 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-11-10 03:26:25,853 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-10 03:26:25,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-10 03:26:25,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-11-10 03:26:25,853 INFO L87 Difference]: Start difference. First operand 70 states and 77 transitions. Second operand 11 states. [2018-11-10 03:26:25,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 03:26:25,882 INFO L93 Difference]: Finished difference Result 109 states and 124 transitions. [2018-11-10 03:26:25,882 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-10 03:26:25,882 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 69 [2018-11-10 03:26:25,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 03:26:25,882 INFO L225 Difference]: With dead ends: 109 [2018-11-10 03:26:25,883 INFO L226 Difference]: Without dead ends: 75 [2018-11-10 03:26:25,883 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-11-10 03:26:25,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-11-10 03:26:25,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2018-11-10 03:26:25,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-11-10 03:26:25,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 81 transitions. [2018-11-10 03:26:25,888 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 81 transitions. Word has length 69 [2018-11-10 03:26:25,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 03:26:25,889 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 81 transitions. [2018-11-10 03:26:25,889 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-10 03:26:25,889 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 81 transitions. [2018-11-10 03:26:25,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-11-10 03:26:25,890 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 03:26:25,890 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 15, 9, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 03:26:25,890 INFO L424 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 03:26:25,890 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 03:26:25,890 INFO L82 PathProgramCache]: Analyzing trace with hash 345619184, now seen corresponding path program 9 times [2018-11-10 03:26:25,890 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 03:26:25,890 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 03:26:25,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:25,891 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 03:26:25,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:25,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:26:25,979 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 243 proven. 171 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2018-11-10 03:26:25,979 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 03:26:25,979 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1b3549e1-c80d-4ae0-9afa-bbf10ee374b7/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 [2018-11-10 03:26:25,994 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-10 03:26:26,022 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-11-10 03:26:26,022 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 03:26:26,025 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 03:26:26,143 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 298 proven. 157 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2018-11-10 03:26:26,170 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 03:26:26,171 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2018-11-10 03:26:26,171 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-11-10 03:26:26,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-11-10 03:26:26,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2018-11-10 03:26:26,172 INFO L87 Difference]: Start difference. First operand 74 states and 81 transitions. Second operand 22 states. [2018-11-10 03:26:26,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 03:26:26,339 INFO L93 Difference]: Finished difference Result 200 states and 239 transitions. [2018-11-10 03:26:26,339 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-11-10 03:26:26,339 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 73 [2018-11-10 03:26:26,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 03:26:26,340 INFO L225 Difference]: With dead ends: 200 [2018-11-10 03:26:26,340 INFO L226 Difference]: Without dead ends: 166 [2018-11-10 03:26:26,341 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=405, Invalid=1235, Unknown=0, NotChecked=0, Total=1640 [2018-11-10 03:26:26,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2018-11-10 03:26:26,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 90. [2018-11-10 03:26:26,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-11-10 03:26:26,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 100 transitions. [2018-11-10 03:26:26,350 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 100 transitions. Word has length 73 [2018-11-10 03:26:26,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 03:26:26,350 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 100 transitions. [2018-11-10 03:26:26,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-11-10 03:26:26,350 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 100 transitions. [2018-11-10 03:26:26,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-11-10 03:26:26,351 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 03:26:26,352 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 19, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 03:26:26,352 INFO L424 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 03:26:26,352 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 03:26:26,352 INFO L82 PathProgramCache]: Analyzing trace with hash -350630558, now seen corresponding path program 10 times [2018-11-10 03:26:26,352 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 03:26:26,352 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 03:26:26,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:26,353 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 03:26:26,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:26,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:26:26,427 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 397 proven. 210 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2018-11-10 03:26:26,428 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 03:26:26,428 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1b3549e1-c80d-4ae0-9afa-bbf10ee374b7/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 [2018-11-10 03:26:26,433 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-10 03:26:26,448 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-10 03:26:26,448 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 03:26:26,450 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 03:26:26,460 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 397 proven. 210 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2018-11-10 03:26:26,476 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 03:26:26,476 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-11-10 03:26:26,476 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-10 03:26:26,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-10 03:26:26,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-11-10 03:26:26,477 INFO L87 Difference]: Start difference. First operand 90 states and 100 transitions. Second operand 13 states. [2018-11-10 03:26:26,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 03:26:26,502 INFO L93 Difference]: Finished difference Result 141 states and 162 transitions. [2018-11-10 03:26:26,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-10 03:26:26,509 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 89 [2018-11-10 03:26:26,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 03:26:26,510 INFO L225 Difference]: With dead ends: 141 [2018-11-10 03:26:26,510 INFO L226 Difference]: Without dead ends: 95 [2018-11-10 03:26:26,510 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-11-10 03:26:26,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-11-10 03:26:26,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2018-11-10 03:26:26,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-11-10 03:26:26,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 104 transitions. [2018-11-10 03:26:26,518 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 104 transitions. Word has length 89 [2018-11-10 03:26:26,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 03:26:26,518 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 104 transitions. [2018-11-10 03:26:26,518 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-10 03:26:26,518 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 104 transitions. [2018-11-10 03:26:26,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-11-10 03:26:26,519 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 03:26:26,519 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 20, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 03:26:26,519 INFO L424 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 03:26:26,519 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 03:26:26,519 INFO L82 PathProgramCache]: Analyzing trace with hash 317658512, now seen corresponding path program 11 times [2018-11-10 03:26:26,520 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 03:26:26,520 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 03:26:26,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:26,520 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 03:26:26,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:26,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:26:26,601 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 434 proven. 253 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2018-11-10 03:26:26,601 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 03:26:26,601 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1b3549e1-c80d-4ae0-9afa-bbf10ee374b7/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 [2018-11-10 03:26:26,606 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-10 03:26:26,645 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2018-11-10 03:26:26,645 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 03:26:26,647 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 03:26:26,659 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 434 proven. 253 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2018-11-10 03:26:26,685 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 03:26:26,685 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-11-10 03:26:26,686 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-10 03:26:26,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-10 03:26:26,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-11-10 03:26:26,686 INFO L87 Difference]: Start difference. First operand 94 states and 104 transitions. Second operand 14 states. [2018-11-10 03:26:26,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 03:26:26,723 INFO L93 Difference]: Finished difference Result 145 states and 166 transitions. [2018-11-10 03:26:26,723 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-10 03:26:26,723 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 93 [2018-11-10 03:26:26,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 03:26:26,724 INFO L225 Difference]: With dead ends: 145 [2018-11-10 03:26:26,724 INFO L226 Difference]: Without dead ends: 99 [2018-11-10 03:26:26,724 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-11-10 03:26:26,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-11-10 03:26:26,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2018-11-10 03:26:26,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-11-10 03:26:26,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 108 transitions. [2018-11-10 03:26:26,734 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 108 transitions. Word has length 93 [2018-11-10 03:26:26,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 03:26:26,735 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 108 transitions. [2018-11-10 03:26:26,735 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-10 03:26:26,735 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 108 transitions. [2018-11-10 03:26:26,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-11-10 03:26:26,736 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 03:26:26,736 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 21, 12, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 03:26:26,736 INFO L424 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 03:26:26,736 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 03:26:26,736 INFO L82 PathProgramCache]: Analyzing trace with hash 1097373374, now seen corresponding path program 12 times [2018-11-10 03:26:26,736 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 03:26:26,736 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 03:26:26,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:26,740 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 03:26:26,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:26,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:26:26,861 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 471 proven. 300 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2018-11-10 03:26:26,861 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 03:26:26,861 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1b3549e1-c80d-4ae0-9afa-bbf10ee374b7/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 [2018-11-10 03:26:26,869 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-10 03:26:26,893 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2018-11-10 03:26:26,893 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 03:26:26,895 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 03:26:26,907 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 471 proven. 300 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2018-11-10 03:26:26,933 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 03:26:26,934 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-11-10 03:26:26,934 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-10 03:26:26,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-10 03:26:26,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-11-10 03:26:26,934 INFO L87 Difference]: Start difference. First operand 98 states and 108 transitions. Second operand 15 states. [2018-11-10 03:26:26,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 03:26:26,963 INFO L93 Difference]: Finished difference Result 149 states and 170 transitions. [2018-11-10 03:26:26,963 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-10 03:26:26,963 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 97 [2018-11-10 03:26:26,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 03:26:26,964 INFO L225 Difference]: With dead ends: 149 [2018-11-10 03:26:26,964 INFO L226 Difference]: Without dead ends: 103 [2018-11-10 03:26:26,965 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-11-10 03:26:26,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-11-10 03:26:26,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2018-11-10 03:26:26,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-11-10 03:26:26,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 112 transitions. [2018-11-10 03:26:26,970 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 112 transitions. Word has length 97 [2018-11-10 03:26:26,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 03:26:26,970 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 112 transitions. [2018-11-10 03:26:26,970 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-10 03:26:26,971 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 112 transitions. [2018-11-10 03:26:26,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-11-10 03:26:26,971 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 03:26:26,972 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 22, 13, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 03:26:26,972 INFO L424 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 03:26:26,972 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 03:26:26,972 INFO L82 PathProgramCache]: Analyzing trace with hash -1480470292, now seen corresponding path program 13 times [2018-11-10 03:26:26,972 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 03:26:26,972 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 03:26:26,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:26,973 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 03:26:26,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:26,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:26:27,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 508 proven. 351 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2018-11-10 03:26:27,064 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 03:26:27,064 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1b3549e1-c80d-4ae0-9afa-bbf10ee374b7/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 [2018-11-10 03:26:27,071 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 03:26:27,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:26:27,088 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 03:26:27,098 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 508 proven. 351 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2018-11-10 03:26:27,117 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 03:26:27,117 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-11-10 03:26:27,118 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-10 03:26:27,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-10 03:26:27,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-11-10 03:26:27,118 INFO L87 Difference]: Start difference. First operand 102 states and 112 transitions. Second operand 16 states. [2018-11-10 03:26:27,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 03:26:27,151 INFO L93 Difference]: Finished difference Result 153 states and 174 transitions. [2018-11-10 03:26:27,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-10 03:26:27,153 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 101 [2018-11-10 03:26:27,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 03:26:27,154 INFO L225 Difference]: With dead ends: 153 [2018-11-10 03:26:27,154 INFO L226 Difference]: Without dead ends: 107 [2018-11-10 03:26:27,155 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-11-10 03:26:27,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-11-10 03:26:27,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2018-11-10 03:26:27,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-11-10 03:26:27,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 116 transitions. [2018-11-10 03:26:27,162 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 116 transitions. Word has length 101 [2018-11-10 03:26:27,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 03:26:27,163 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 116 transitions. [2018-11-10 03:26:27,163 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-10 03:26:27,163 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 116 transitions. [2018-11-10 03:26:27,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-11-10 03:26:27,164 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 03:26:27,164 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 23, 14, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 03:26:27,164 INFO L424 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 03:26:27,164 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 03:26:27,164 INFO L82 PathProgramCache]: Analyzing trace with hash 1836467226, now seen corresponding path program 14 times [2018-11-10 03:26:27,164 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 03:26:27,165 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 03:26:27,168 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:27,169 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 03:26:27,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:27,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:26:27,283 INFO L134 CoverageAnalysis]: Checked inductivity of 1104 backedges. 545 proven. 406 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2018-11-10 03:26:27,283 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 03:26:27,283 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1b3549e1-c80d-4ae0-9afa-bbf10ee374b7/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 [2018-11-10 03:26:27,289 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-10 03:26:27,306 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-10 03:26:27,306 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 03:26:27,308 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 03:26:27,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1104 backedges. 545 proven. 406 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2018-11-10 03:26:27,344 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 03:26:27,344 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-11-10 03:26:27,344 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-10 03:26:27,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-10 03:26:27,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-11-10 03:26:27,344 INFO L87 Difference]: Start difference. First operand 106 states and 116 transitions. Second operand 17 states. [2018-11-10 03:26:27,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 03:26:27,383 INFO L93 Difference]: Finished difference Result 157 states and 178 transitions. [2018-11-10 03:26:27,384 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-10 03:26:27,384 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 105 [2018-11-10 03:26:27,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 03:26:27,384 INFO L225 Difference]: With dead ends: 157 [2018-11-10 03:26:27,384 INFO L226 Difference]: Without dead ends: 111 [2018-11-10 03:26:27,385 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-11-10 03:26:27,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-11-10 03:26:27,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2018-11-10 03:26:27,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-11-10 03:26:27,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 120 transitions. [2018-11-10 03:26:27,388 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 120 transitions. Word has length 105 [2018-11-10 03:26:27,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 03:26:27,389 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 120 transitions. [2018-11-10 03:26:27,389 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-10 03:26:27,390 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 120 transitions. [2018-11-10 03:26:27,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-11-10 03:26:27,390 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 03:26:27,390 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 24, 15, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 03:26:27,391 INFO L424 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 03:26:27,391 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 03:26:27,391 INFO L82 PathProgramCache]: Analyzing trace with hash -1874759608, now seen corresponding path program 15 times [2018-11-10 03:26:27,391 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 03:26:27,391 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 03:26:27,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:27,392 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 03:26:27,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:27,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:26:27,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 582 proven. 465 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2018-11-10 03:26:27,498 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 03:26:27,498 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1b3549e1-c80d-4ae0-9afa-bbf10ee374b7/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 [2018-11-10 03:26:27,503 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-10 03:26:27,526 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2018-11-10 03:26:27,526 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 03:26:27,528 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 03:26:27,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 582 proven. 465 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2018-11-10 03:26:27,554 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 03:26:27,554 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-11-10 03:26:27,555 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-10 03:26:27,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-10 03:26:27,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-11-10 03:26:27,555 INFO L87 Difference]: Start difference. First operand 110 states and 120 transitions. Second operand 18 states. [2018-11-10 03:26:27,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 03:26:27,588 INFO L93 Difference]: Finished difference Result 161 states and 182 transitions. [2018-11-10 03:26:27,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-11-10 03:26:27,588 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 109 [2018-11-10 03:26:27,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 03:26:27,589 INFO L225 Difference]: With dead ends: 161 [2018-11-10 03:26:27,589 INFO L226 Difference]: Without dead ends: 115 [2018-11-10 03:26:27,589 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-11-10 03:26:27,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-11-10 03:26:27,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2018-11-10 03:26:27,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-11-10 03:26:27,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 124 transitions. [2018-11-10 03:26:27,592 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 124 transitions. Word has length 109 [2018-11-10 03:26:27,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 03:26:27,592 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 124 transitions. [2018-11-10 03:26:27,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-10 03:26:27,592 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 124 transitions. [2018-11-10 03:26:27,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-11-10 03:26:27,593 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 03:26:27,593 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 25, 16, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 03:26:27,593 INFO L424 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 03:26:27,593 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 03:26:27,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1004612234, now seen corresponding path program 16 times [2018-11-10 03:26:27,594 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 03:26:27,594 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 03:26:27,594 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:27,594 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 03:26:27,594 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:27,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:26:27,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 619 proven. 528 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2018-11-10 03:26:27,735 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 03:26:27,735 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1b3549e1-c80d-4ae0-9afa-bbf10ee374b7/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 [2018-11-10 03:26:27,741 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-10 03:26:27,761 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-10 03:26:27,761 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 03:26:27,762 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 03:26:27,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 619 proven. 528 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2018-11-10 03:26:27,789 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 03:26:27,789 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-11-10 03:26:27,790 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-11-10 03:26:27,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-11-10 03:26:27,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-11-10 03:26:27,790 INFO L87 Difference]: Start difference. First operand 114 states and 124 transitions. Second operand 19 states. [2018-11-10 03:26:27,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 03:26:27,827 INFO L93 Difference]: Finished difference Result 165 states and 186 transitions. [2018-11-10 03:26:27,828 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-10 03:26:27,828 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 113 [2018-11-10 03:26:27,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 03:26:27,829 INFO L225 Difference]: With dead ends: 165 [2018-11-10 03:26:27,829 INFO L226 Difference]: Without dead ends: 119 [2018-11-10 03:26:27,829 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-11-10 03:26:27,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-11-10 03:26:27,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2018-11-10 03:26:27,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-11-10 03:26:27,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 128 transitions. [2018-11-10 03:26:27,833 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 128 transitions. Word has length 113 [2018-11-10 03:26:27,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 03:26:27,833 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 128 transitions. [2018-11-10 03:26:27,833 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-11-10 03:26:27,833 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 128 transitions. [2018-11-10 03:26:27,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-11-10 03:26:27,834 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 03:26:27,834 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 26, 17, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 03:26:27,834 INFO L424 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 03:26:27,834 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 03:26:27,834 INFO L82 PathProgramCache]: Analyzing trace with hash 1397355428, now seen corresponding path program 17 times [2018-11-10 03:26:27,834 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 03:26:27,834 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 03:26:27,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:27,835 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 03:26:27,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:27,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:26:27,969 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 656 proven. 595 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2018-11-10 03:26:27,969 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 03:26:27,969 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1b3549e1-c80d-4ae0-9afa-bbf10ee374b7/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 [2018-11-10 03:26:27,975 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-10 03:26:28,012 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 27 check-sat command(s) [2018-11-10 03:26:28,013 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 03:26:28,014 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 03:26:28,027 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 656 proven. 595 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2018-11-10 03:26:28,044 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 03:26:28,045 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-11-10 03:26:28,045 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-10 03:26:28,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-10 03:26:28,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-11-10 03:26:28,045 INFO L87 Difference]: Start difference. First operand 118 states and 128 transitions. Second operand 20 states. [2018-11-10 03:26:28,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 03:26:28,084 INFO L93 Difference]: Finished difference Result 169 states and 190 transitions. [2018-11-10 03:26:28,085 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-11-10 03:26:28,085 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 117 [2018-11-10 03:26:28,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 03:26:28,086 INFO L225 Difference]: With dead ends: 169 [2018-11-10 03:26:28,086 INFO L226 Difference]: Without dead ends: 123 [2018-11-10 03:26:28,086 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-11-10 03:26:28,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-11-10 03:26:28,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2018-11-10 03:26:28,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-11-10 03:26:28,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 132 transitions. [2018-11-10 03:26:28,090 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 132 transitions. Word has length 117 [2018-11-10 03:26:28,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 03:26:28,091 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 132 transitions. [2018-11-10 03:26:28,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-10 03:26:28,091 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 132 transitions. [2018-11-10 03:26:28,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-11-10 03:26:28,091 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 03:26:28,091 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 27, 18, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 03:26:28,092 INFO L424 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 03:26:28,092 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 03:26:28,092 INFO L82 PathProgramCache]: Analyzing trace with hash -29472046, now seen corresponding path program 18 times [2018-11-10 03:26:28,092 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 03:26:28,092 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 03:26:28,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:28,093 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 03:26:28,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:28,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:26:28,223 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 693 proven. 666 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2018-11-10 03:26:28,224 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 03:26:28,224 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1b3549e1-c80d-4ae0-9afa-bbf10ee374b7/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 [2018-11-10 03:26:28,229 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-10 03:26:28,261 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-11-10 03:26:28,261 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 03:26:28,263 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 03:26:28,487 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 1132 proven. 343 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2018-11-10 03:26:28,504 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 03:26:28,504 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 40 [2018-11-10 03:26:28,504 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-11-10 03:26:28,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-11-10 03:26:28,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=1141, Unknown=0, NotChecked=0, Total=1560 [2018-11-10 03:26:28,505 INFO L87 Difference]: Start difference. First operand 122 states and 132 transitions. Second operand 40 states. [2018-11-10 03:26:28,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 03:26:28,910 INFO L93 Difference]: Finished difference Result 542 states and 662 transitions. [2018-11-10 03:26:28,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-11-10 03:26:28,911 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 121 [2018-11-10 03:26:28,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 03:26:28,912 INFO L225 Difference]: With dead ends: 542 [2018-11-10 03:26:28,912 INFO L226 Difference]: Without dead ends: 496 [2018-11-10 03:26:28,913 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1279 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1287, Invalid=4565, Unknown=0, NotChecked=0, Total=5852 [2018-11-10 03:26:28,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2018-11-10 03:26:28,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 162. [2018-11-10 03:26:28,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2018-11-10 03:26:28,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 181 transitions. [2018-11-10 03:26:28,927 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 181 transitions. Word has length 121 [2018-11-10 03:26:28,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 03:26:28,928 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 181 transitions. [2018-11-10 03:26:28,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-11-10 03:26:28,928 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 181 transitions. [2018-11-10 03:26:28,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2018-11-10 03:26:28,929 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 03:26:28,929 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 37, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 03:26:28,929 INFO L424 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 03:26:28,929 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 03:26:28,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1933849908, now seen corresponding path program 19 times [2018-11-10 03:26:28,929 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 03:26:28,929 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 03:26:28,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:28,930 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 03:26:28,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:28,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:26:29,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2812 backedges. 1441 proven. 741 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2018-11-10 03:26:29,085 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 03:26:29,085 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1b3549e1-c80d-4ae0-9afa-bbf10ee374b7/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 [2018-11-10 03:26:29,090 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 03:26:29,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:26:29,114 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 03:26:29,128 INFO L134 CoverageAnalysis]: Checked inductivity of 2812 backedges. 1441 proven. 741 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2018-11-10 03:26:29,144 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 03:26:29,144 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-11-10 03:26:29,144 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-11-10 03:26:29,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-11-10 03:26:29,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-11-10 03:26:29,145 INFO L87 Difference]: Start difference. First operand 162 states and 181 transitions. Second operand 22 states. [2018-11-10 03:26:29,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 03:26:29,184 INFO L93 Difference]: Finished difference Result 249 states and 288 transitions. [2018-11-10 03:26:29,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-11-10 03:26:29,185 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 161 [2018-11-10 03:26:29,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 03:26:29,186 INFO L225 Difference]: With dead ends: 249 [2018-11-10 03:26:29,186 INFO L226 Difference]: Without dead ends: 167 [2018-11-10 03:26:29,186 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-11-10 03:26:29,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-11-10 03:26:29,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 166. [2018-11-10 03:26:29,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2018-11-10 03:26:29,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 185 transitions. [2018-11-10 03:26:29,198 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 185 transitions. Word has length 161 [2018-11-10 03:26:29,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 03:26:29,198 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 185 transitions. [2018-11-10 03:26:29,198 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-11-10 03:26:29,198 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 185 transitions. [2018-11-10 03:26:29,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2018-11-10 03:26:29,199 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 03:26:29,199 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 38, 20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 03:26:29,199 INFO L424 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 03:26:29,199 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 03:26:29,199 INFO L82 PathProgramCache]: Analyzing trace with hash 78419194, now seen corresponding path program 20 times [2018-11-10 03:26:29,200 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 03:26:29,200 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 03:26:29,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:29,200 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 03:26:29,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:29,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:26:29,416 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 1514 proven. 820 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2018-11-10 03:26:29,417 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 03:26:29,417 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1b3549e1-c80d-4ae0-9afa-bbf10ee374b7/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 [2018-11-10 03:26:29,424 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-10 03:26:29,449 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-10 03:26:29,449 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 03:26:29,451 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 03:26:29,466 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 1514 proven. 820 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2018-11-10 03:26:29,482 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 03:26:29,482 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-11-10 03:26:29,482 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-11-10 03:26:29,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-11-10 03:26:29,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-11-10 03:26:29,483 INFO L87 Difference]: Start difference. First operand 166 states and 185 transitions. Second operand 23 states. [2018-11-10 03:26:29,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 03:26:29,528 INFO L93 Difference]: Finished difference Result 253 states and 292 transitions. [2018-11-10 03:26:29,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-11-10 03:26:29,529 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 165 [2018-11-10 03:26:29,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 03:26:29,529 INFO L225 Difference]: With dead ends: 253 [2018-11-10 03:26:29,529 INFO L226 Difference]: Without dead ends: 171 [2018-11-10 03:26:29,530 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-11-10 03:26:29,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-11-10 03:26:29,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 170. [2018-11-10 03:26:29,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2018-11-10 03:26:29,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 189 transitions. [2018-11-10 03:26:29,538 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 189 transitions. Word has length 165 [2018-11-10 03:26:29,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 03:26:29,538 INFO L481 AbstractCegarLoop]: Abstraction has 170 states and 189 transitions. [2018-11-10 03:26:29,538 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-11-10 03:26:29,538 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 189 transitions. [2018-11-10 03:26:29,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2018-11-10 03:26:29,539 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 03:26:29,539 INFO L375 BasicCegarLoop]: trace histogram [40, 40, 39, 21, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 03:26:29,539 INFO L424 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 03:26:29,539 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 03:26:29,540 INFO L82 PathProgramCache]: Analyzing trace with hash 632330280, now seen corresponding path program 21 times [2018-11-10 03:26:29,540 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 03:26:29,540 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 03:26:29,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:29,540 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 03:26:29,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:29,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:26:29,726 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 1587 proven. 903 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2018-11-10 03:26:29,727 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 03:26:29,727 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1b3549e1-c80d-4ae0-9afa-bbf10ee374b7/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 [2018-11-10 03:26:29,732 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-10 03:26:29,772 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-11-10 03:26:29,772 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 03:26:29,774 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 03:26:30,095 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 1714 proven. 1333 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2018-11-10 03:26:30,111 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 03:26:30,112 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2018-11-10 03:26:30,112 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-11-10 03:26:30,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-11-10 03:26:30,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=551, Invalid=1519, Unknown=0, NotChecked=0, Total=2070 [2018-11-10 03:26:30,112 INFO L87 Difference]: Start difference. First operand 170 states and 189 transitions. Second operand 46 states. [2018-11-10 03:26:30,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 03:26:30,586 INFO L93 Difference]: Finished difference Result 488 states and 587 transitions. [2018-11-10 03:26:30,587 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-11-10 03:26:30,587 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 169 [2018-11-10 03:26:30,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 03:26:30,588 INFO L225 Difference]: With dead ends: 488 [2018-11-10 03:26:30,588 INFO L226 Difference]: Without dead ends: 406 [2018-11-10 03:26:30,589 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1744 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1689, Invalid=6143, Unknown=0, NotChecked=0, Total=7832 [2018-11-10 03:26:30,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2018-11-10 03:26:30,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 186. [2018-11-10 03:26:30,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2018-11-10 03:26:30,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 208 transitions. [2018-11-10 03:26:30,602 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 208 transitions. Word has length 169 [2018-11-10 03:26:30,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 03:26:30,602 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 208 transitions. [2018-11-10 03:26:30,603 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-11-10 03:26:30,603 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 208 transitions. [2018-11-10 03:26:30,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2018-11-10 03:26:30,603 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 03:26:30,603 INFO L375 BasicCegarLoop]: trace histogram [44, 44, 43, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 03:26:30,604 INFO L424 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 03:26:30,604 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 03:26:30,604 INFO L82 PathProgramCache]: Analyzing trace with hash 762179226, now seen corresponding path program 22 times [2018-11-10 03:26:30,604 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 03:26:30,604 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 03:26:30,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:30,605 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 03:26:30,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:30,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:26:30,816 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 1933 proven. 990 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2018-11-10 03:26:30,816 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 03:26:30,816 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1b3549e1-c80d-4ae0-9afa-bbf10ee374b7/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 [2018-11-10 03:26:30,823 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-10 03:26:30,854 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-10 03:26:30,854 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 03:26:30,856 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 03:26:30,884 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 1933 proven. 990 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2018-11-10 03:26:30,900 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 03:26:30,900 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-11-10 03:26:30,901 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-11-10 03:26:30,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-11-10 03:26:30,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-11-10 03:26:30,901 INFO L87 Difference]: Start difference. First operand 186 states and 208 transitions. Second operand 25 states. [2018-11-10 03:26:30,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 03:26:30,968 INFO L93 Difference]: Finished difference Result 285 states and 330 transitions. [2018-11-10 03:26:30,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-11-10 03:26:30,968 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 185 [2018-11-10 03:26:30,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 03:26:30,969 INFO L225 Difference]: With dead ends: 285 [2018-11-10 03:26:30,969 INFO L226 Difference]: Without dead ends: 191 [2018-11-10 03:26:30,970 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-11-10 03:26:30,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-11-10 03:26:30,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 190. [2018-11-10 03:26:30,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2018-11-10 03:26:30,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 212 transitions. [2018-11-10 03:26:30,982 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 212 transitions. Word has length 185 [2018-11-10 03:26:30,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 03:26:30,982 INFO L481 AbstractCegarLoop]: Abstraction has 190 states and 212 transitions. [2018-11-10 03:26:30,982 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-11-10 03:26:30,982 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 212 transitions. [2018-11-10 03:26:30,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2018-11-10 03:26:30,983 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 03:26:30,983 INFO L375 BasicCegarLoop]: trace histogram [45, 45, 44, 23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 03:26:30,983 INFO L424 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 03:26:30,983 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 03:26:30,983 INFO L82 PathProgramCache]: Analyzing trace with hash -1295085880, now seen corresponding path program 23 times [2018-11-10 03:26:30,983 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 03:26:30,983 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 03:26:30,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:30,984 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 03:26:30,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:30,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:26:31,188 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 2018 proven. 1081 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2018-11-10 03:26:31,189 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 03:26:31,189 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1b3549e1-c80d-4ae0-9afa-bbf10ee374b7/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 [2018-11-10 03:26:31,196 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-10 03:26:31,296 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 45 check-sat command(s) [2018-11-10 03:26:31,296 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 03:26:31,299 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 03:26:31,316 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 2018 proven. 1081 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2018-11-10 03:26:31,334 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 03:26:31,334 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-11-10 03:26:31,335 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-11-10 03:26:31,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-11-10 03:26:31,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-11-10 03:26:31,335 INFO L87 Difference]: Start difference. First operand 190 states and 212 transitions. Second operand 26 states. [2018-11-10 03:26:31,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 03:26:31,385 INFO L93 Difference]: Finished difference Result 289 states and 334 transitions. [2018-11-10 03:26:31,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-11-10 03:26:31,386 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 189 [2018-11-10 03:26:31,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 03:26:31,387 INFO L225 Difference]: With dead ends: 289 [2018-11-10 03:26:31,387 INFO L226 Difference]: Without dead ends: 195 [2018-11-10 03:26:31,387 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-11-10 03:26:31,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-11-10 03:26:31,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 194. [2018-11-10 03:26:31,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2018-11-10 03:26:31,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 216 transitions. [2018-11-10 03:26:31,399 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 216 transitions. Word has length 189 [2018-11-10 03:26:31,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 03:26:31,400 INFO L481 AbstractCegarLoop]: Abstraction has 194 states and 216 transitions. [2018-11-10 03:26:31,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-11-10 03:26:31,400 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 216 transitions. [2018-11-10 03:26:31,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2018-11-10 03:26:31,400 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 03:26:31,401 INFO L375 BasicCegarLoop]: trace histogram [46, 46, 45, 24, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 03:26:31,401 INFO L424 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 03:26:31,401 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 03:26:31,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1499949046, now seen corresponding path program 24 times [2018-11-10 03:26:31,401 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 03:26:31,401 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 03:26:31,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:31,402 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 03:26:31,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:31,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:26:31,619 INFO L134 CoverageAnalysis]: Checked inductivity of 4140 backedges. 2103 proven. 1176 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2018-11-10 03:26:31,619 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 03:26:31,619 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1b3549e1-c80d-4ae0-9afa-bbf10ee374b7/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 [2018-11-10 03:26:31,627 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-10 03:26:31,678 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 44 check-sat command(s) [2018-11-10 03:26:31,678 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 03:26:31,680 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 03:26:31,701 INFO L134 CoverageAnalysis]: Checked inductivity of 4140 backedges. 2103 proven. 1176 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2018-11-10 03:26:31,717 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 03:26:31,718 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-11-10 03:26:31,718 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-11-10 03:26:31,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-11-10 03:26:31,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-11-10 03:26:31,718 INFO L87 Difference]: Start difference. First operand 194 states and 216 transitions. Second operand 27 states. [2018-11-10 03:26:31,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 03:26:31,783 INFO L93 Difference]: Finished difference Result 293 states and 338 transitions. [2018-11-10 03:26:31,784 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-11-10 03:26:31,784 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 193 [2018-11-10 03:26:31,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 03:26:31,785 INFO L225 Difference]: With dead ends: 293 [2018-11-10 03:26:31,785 INFO L226 Difference]: Without dead ends: 199 [2018-11-10 03:26:31,786 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-11-10 03:26:31,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2018-11-10 03:26:31,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 198. [2018-11-10 03:26:31,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2018-11-10 03:26:31,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 220 transitions. [2018-11-10 03:26:31,806 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 220 transitions. Word has length 193 [2018-11-10 03:26:31,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 03:26:31,806 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 220 transitions. [2018-11-10 03:26:31,806 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-11-10 03:26:31,806 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 220 transitions. [2018-11-10 03:26:31,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2018-11-10 03:26:31,807 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 03:26:31,807 INFO L375 BasicCegarLoop]: trace histogram [47, 47, 46, 25, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 03:26:31,807 INFO L424 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 03:26:31,807 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 03:26:31,808 INFO L82 PathProgramCache]: Analyzing trace with hash -395052508, now seen corresponding path program 25 times [2018-11-10 03:26:31,808 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 03:26:31,808 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 03:26:31,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:31,808 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 03:26:31,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:31,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:26:32,054 INFO L134 CoverageAnalysis]: Checked inductivity of 4324 backedges. 2188 proven. 1275 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2018-11-10 03:26:32,054 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 03:26:32,054 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1b3549e1-c80d-4ae0-9afa-bbf10ee374b7/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 [2018-11-10 03:26:32,061 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 03:26:32,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:26:32,090 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 03:26:32,121 INFO L134 CoverageAnalysis]: Checked inductivity of 4324 backedges. 2188 proven. 1275 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2018-11-10 03:26:32,137 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 03:26:32,137 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-11-10 03:26:32,138 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-11-10 03:26:32,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-11-10 03:26:32,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-11-10 03:26:32,138 INFO L87 Difference]: Start difference. First operand 198 states and 220 transitions. Second operand 28 states. [2018-11-10 03:26:32,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 03:26:32,193 INFO L93 Difference]: Finished difference Result 297 states and 342 transitions. [2018-11-10 03:26:32,193 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-11-10 03:26:32,193 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 197 [2018-11-10 03:26:32,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 03:26:32,194 INFO L225 Difference]: With dead ends: 297 [2018-11-10 03:26:32,194 INFO L226 Difference]: Without dead ends: 203 [2018-11-10 03:26:32,194 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-11-10 03:26:32,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-11-10 03:26:32,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 202. [2018-11-10 03:26:32,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2018-11-10 03:26:32,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 224 transitions. [2018-11-10 03:26:32,214 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 224 transitions. Word has length 197 [2018-11-10 03:26:32,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 03:26:32,214 INFO L481 AbstractCegarLoop]: Abstraction has 202 states and 224 transitions. [2018-11-10 03:26:32,214 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-11-10 03:26:32,214 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 224 transitions. [2018-11-10 03:26:32,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2018-11-10 03:26:32,215 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 03:26:32,215 INFO L375 BasicCegarLoop]: trace histogram [48, 48, 47, 26, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 03:26:32,215 INFO L424 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 03:26:32,216 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 03:26:32,216 INFO L82 PathProgramCache]: Analyzing trace with hash 493864274, now seen corresponding path program 26 times [2018-11-10 03:26:32,216 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 03:26:32,216 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 03:26:32,216 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:32,216 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 03:26:32,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:32,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:26:32,524 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 2273 proven. 1378 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2018-11-10 03:26:32,525 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 03:26:32,525 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1b3549e1-c80d-4ae0-9afa-bbf10ee374b7/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 [2018-11-10 03:26:32,530 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-10 03:26:32,557 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-10 03:26:32,557 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 03:26:32,560 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 03:26:32,583 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 2273 proven. 1378 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2018-11-10 03:26:32,599 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 03:26:32,599 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-11-10 03:26:32,599 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-11-10 03:26:32,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-11-10 03:26:32,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-11-10 03:26:32,600 INFO L87 Difference]: Start difference. First operand 202 states and 224 transitions. Second operand 29 states. [2018-11-10 03:26:32,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 03:26:32,681 INFO L93 Difference]: Finished difference Result 301 states and 346 transitions. [2018-11-10 03:26:32,682 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-11-10 03:26:32,682 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 201 [2018-11-10 03:26:32,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 03:26:32,683 INFO L225 Difference]: With dead ends: 301 [2018-11-10 03:26:32,683 INFO L226 Difference]: Without dead ends: 207 [2018-11-10 03:26:32,684 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-11-10 03:26:32,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2018-11-10 03:26:32,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 206. [2018-11-10 03:26:32,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2018-11-10 03:26:32,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 228 transitions. [2018-11-10 03:26:32,699 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 228 transitions. Word has length 201 [2018-11-10 03:26:32,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 03:26:32,699 INFO L481 AbstractCegarLoop]: Abstraction has 206 states and 228 transitions. [2018-11-10 03:26:32,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-11-10 03:26:32,699 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 228 transitions. [2018-11-10 03:26:32,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2018-11-10 03:26:32,700 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 03:26:32,700 INFO L375 BasicCegarLoop]: trace histogram [49, 49, 48, 27, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 03:26:32,700 INFO L424 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 03:26:32,700 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 03:26:32,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1944696448, now seen corresponding path program 27 times [2018-11-10 03:26:32,701 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 03:26:32,701 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 03:26:32,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:32,701 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 03:26:32,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:32,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:26:32,971 INFO L134 CoverageAnalysis]: Checked inductivity of 4704 backedges. 2358 proven. 1485 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2018-11-10 03:26:32,971 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 03:26:32,971 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1b3549e1-c80d-4ae0-9afa-bbf10ee374b7/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 [2018-11-10 03:26:32,977 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-10 03:26:33,028 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 49 check-sat command(s) [2018-11-10 03:26:33,028 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 03:26:33,030 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 03:26:33,056 INFO L134 CoverageAnalysis]: Checked inductivity of 4704 backedges. 2358 proven. 1485 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2018-11-10 03:26:33,072 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 03:26:33,073 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-11-10 03:26:33,073 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-11-10 03:26:33,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-11-10 03:26:33,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-11-10 03:26:33,073 INFO L87 Difference]: Start difference. First operand 206 states and 228 transitions. Second operand 30 states. [2018-11-10 03:26:33,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 03:26:33,130 INFO L93 Difference]: Finished difference Result 305 states and 350 transitions. [2018-11-10 03:26:33,130 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-11-10 03:26:33,130 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 205 [2018-11-10 03:26:33,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 03:26:33,131 INFO L225 Difference]: With dead ends: 305 [2018-11-10 03:26:33,131 INFO L226 Difference]: Without dead ends: 211 [2018-11-10 03:26:33,132 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-11-10 03:26:33,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2018-11-10 03:26:33,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 210. [2018-11-10 03:26:33,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2018-11-10 03:26:33,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 232 transitions. [2018-11-10 03:26:33,154 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 232 transitions. Word has length 205 [2018-11-10 03:26:33,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 03:26:33,155 INFO L481 AbstractCegarLoop]: Abstraction has 210 states and 232 transitions. [2018-11-10 03:26:33,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-11-10 03:26:33,155 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 232 transitions. [2018-11-10 03:26:33,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2018-11-10 03:26:33,156 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 03:26:33,156 INFO L375 BasicCegarLoop]: trace histogram [50, 50, 49, 28, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 03:26:33,156 INFO L424 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 03:26:33,156 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 03:26:33,156 INFO L82 PathProgramCache]: Analyzing trace with hash 2120418990, now seen corresponding path program 28 times [2018-11-10 03:26:33,157 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 03:26:33,157 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 03:26:33,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:33,157 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 03:26:33,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:33,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:26:33,488 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 2443 proven. 1596 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2018-11-10 03:26:33,488 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 03:26:33,488 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1b3549e1-c80d-4ae0-9afa-bbf10ee374b7/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 [2018-11-10 03:26:33,496 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-10 03:26:33,529 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-10 03:26:33,529 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 03:26:33,531 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 03:26:33,551 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 2443 proven. 1596 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2018-11-10 03:26:33,567 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 03:26:33,567 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-11-10 03:26:33,568 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-11-10 03:26:33,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-11-10 03:26:33,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-11-10 03:26:33,568 INFO L87 Difference]: Start difference. First operand 210 states and 232 transitions. Second operand 31 states. [2018-11-10 03:26:33,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 03:26:33,628 INFO L93 Difference]: Finished difference Result 309 states and 354 transitions. [2018-11-10 03:26:33,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-11-10 03:26:33,628 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 209 [2018-11-10 03:26:33,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 03:26:33,629 INFO L225 Difference]: With dead ends: 309 [2018-11-10 03:26:33,629 INFO L226 Difference]: Without dead ends: 215 [2018-11-10 03:26:33,630 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-11-10 03:26:33,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2018-11-10 03:26:33,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 214. [2018-11-10 03:26:33,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2018-11-10 03:26:33,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 236 transitions. [2018-11-10 03:26:33,642 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 236 transitions. Word has length 209 [2018-11-10 03:26:33,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 03:26:33,642 INFO L481 AbstractCegarLoop]: Abstraction has 214 states and 236 transitions. [2018-11-10 03:26:33,642 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-11-10 03:26:33,642 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 236 transitions. [2018-11-10 03:26:33,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2018-11-10 03:26:33,643 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 03:26:33,643 INFO L375 BasicCegarLoop]: trace histogram [51, 51, 50, 29, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 03:26:33,643 INFO L424 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 03:26:33,644 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 03:26:33,644 INFO L82 PathProgramCache]: Analyzing trace with hash -728662820, now seen corresponding path program 29 times [2018-11-10 03:26:33,644 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 03:26:33,644 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 03:26:33,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:33,644 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 03:26:33,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:33,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:26:33,938 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 2528 proven. 1711 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2018-11-10 03:26:33,938 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 03:26:33,938 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1b3549e1-c80d-4ae0-9afa-bbf10ee374b7/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 [2018-11-10 03:26:33,944 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-10 03:26:34,031 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 51 check-sat command(s) [2018-11-10 03:26:34,031 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 03:26:34,033 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 03:26:34,054 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 2528 proven. 1711 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2018-11-10 03:26:34,070 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 03:26:34,071 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-11-10 03:26:34,071 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-11-10 03:26:34,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-11-10 03:26:34,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-11-10 03:26:34,071 INFO L87 Difference]: Start difference. First operand 214 states and 236 transitions. Second operand 32 states. [2018-11-10 03:26:34,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 03:26:34,132 INFO L93 Difference]: Finished difference Result 313 states and 358 transitions. [2018-11-10 03:26:34,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-11-10 03:26:34,133 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 213 [2018-11-10 03:26:34,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 03:26:34,134 INFO L225 Difference]: With dead ends: 313 [2018-11-10 03:26:34,134 INFO L226 Difference]: Without dead ends: 219 [2018-11-10 03:26:34,134 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-11-10 03:26:34,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-11-10 03:26:34,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 218. [2018-11-10 03:26:34,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2018-11-10 03:26:34,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 240 transitions. [2018-11-10 03:26:34,147 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 240 transitions. Word has length 213 [2018-11-10 03:26:34,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 03:26:34,147 INFO L481 AbstractCegarLoop]: Abstraction has 218 states and 240 transitions. [2018-11-10 03:26:34,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-11-10 03:26:34,147 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 240 transitions. [2018-11-10 03:26:34,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2018-11-10 03:26:34,148 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 03:26:34,148 INFO L375 BasicCegarLoop]: trace histogram [52, 52, 51, 30, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 03:26:34,149 INFO L424 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 03:26:34,149 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 03:26:34,149 INFO L82 PathProgramCache]: Analyzing trace with hash -451073014, now seen corresponding path program 30 times [2018-11-10 03:26:34,149 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 03:26:34,149 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 03:26:34,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:34,150 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 03:26:34,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:34,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:26:34,478 INFO L134 CoverageAnalysis]: Checked inductivity of 5304 backedges. 2613 proven. 1830 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2018-11-10 03:26:34,478 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 03:26:34,479 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1b3549e1-c80d-4ae0-9afa-bbf10ee374b7/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 [2018-11-10 03:26:34,494 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-10 03:26:34,572 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-11-10 03:26:34,572 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 03:26:34,574 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 03:26:34,597 INFO L134 CoverageAnalysis]: Checked inductivity of 5304 backedges. 2613 proven. 1830 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2018-11-10 03:26:34,613 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 03:26:34,613 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-11-10 03:26:34,613 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-11-10 03:26:34,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-11-10 03:26:34,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-11-10 03:26:34,614 INFO L87 Difference]: Start difference. First operand 218 states and 240 transitions. Second operand 33 states. [2018-11-10 03:26:34,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 03:26:34,675 INFO L93 Difference]: Finished difference Result 317 states and 362 transitions. [2018-11-10 03:26:34,676 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-11-10 03:26:34,676 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 217 [2018-11-10 03:26:34,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 03:26:34,677 INFO L225 Difference]: With dead ends: 317 [2018-11-10 03:26:34,677 INFO L226 Difference]: Without dead ends: 223 [2018-11-10 03:26:34,678 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-11-10 03:26:34,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2018-11-10 03:26:34,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 222. [2018-11-10 03:26:34,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2018-11-10 03:26:34,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 244 transitions. [2018-11-10 03:26:34,690 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 244 transitions. Word has length 217 [2018-11-10 03:26:34,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 03:26:34,690 INFO L481 AbstractCegarLoop]: Abstraction has 222 states and 244 transitions. [2018-11-10 03:26:34,690 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-11-10 03:26:34,690 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 244 transitions. [2018-11-10 03:26:34,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2018-11-10 03:26:34,691 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 03:26:34,691 INFO L375 BasicCegarLoop]: trace histogram [53, 53, 52, 31, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 03:26:34,691 INFO L424 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 03:26:34,692 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 03:26:34,692 INFO L82 PathProgramCache]: Analyzing trace with hash 1556190264, now seen corresponding path program 31 times [2018-11-10 03:26:34,692 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 03:26:34,692 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 03:26:34,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:34,692 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 03:26:34,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:34,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:26:35,037 INFO L134 CoverageAnalysis]: Checked inductivity of 5512 backedges. 2698 proven. 1953 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2018-11-10 03:26:35,038 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 03:26:35,038 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1b3549e1-c80d-4ae0-9afa-bbf10ee374b7/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 [2018-11-10 03:26:35,046 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 03:26:35,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:26:35,081 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 03:26:35,121 INFO L134 CoverageAnalysis]: Checked inductivity of 5512 backedges. 2698 proven. 1953 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2018-11-10 03:26:35,147 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 03:26:35,148 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-11-10 03:26:35,148 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-11-10 03:26:35,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-11-10 03:26:35,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-11-10 03:26:35,149 INFO L87 Difference]: Start difference. First operand 222 states and 244 transitions. Second operand 34 states. [2018-11-10 03:26:35,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 03:26:35,296 INFO L93 Difference]: Finished difference Result 321 states and 366 transitions. [2018-11-10 03:26:35,296 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-11-10 03:26:35,297 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 221 [2018-11-10 03:26:35,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 03:26:35,297 INFO L225 Difference]: With dead ends: 321 [2018-11-10 03:26:35,297 INFO L226 Difference]: Without dead ends: 227 [2018-11-10 03:26:35,298 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-11-10 03:26:35,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2018-11-10 03:26:35,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 226. [2018-11-10 03:26:35,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2018-11-10 03:26:35,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 248 transitions. [2018-11-10 03:26:35,309 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 248 transitions. Word has length 221 [2018-11-10 03:26:35,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 03:26:35,309 INFO L481 AbstractCegarLoop]: Abstraction has 226 states and 248 transitions. [2018-11-10 03:26:35,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-11-10 03:26:35,309 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 248 transitions. [2018-11-10 03:26:35,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2018-11-10 03:26:35,310 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 03:26:35,310 INFO L375 BasicCegarLoop]: trace histogram [54, 54, 53, 32, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 03:26:35,311 INFO L424 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 03:26:35,311 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 03:26:35,311 INFO L82 PathProgramCache]: Analyzing trace with hash 511325542, now seen corresponding path program 32 times [2018-11-10 03:26:35,311 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 03:26:35,311 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 03:26:35,311 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:35,312 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 03:26:35,312 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:35,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:26:35,672 INFO L134 CoverageAnalysis]: Checked inductivity of 5724 backedges. 2783 proven. 2080 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2018-11-10 03:26:35,672 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 03:26:35,672 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1b3549e1-c80d-4ae0-9afa-bbf10ee374b7/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 [2018-11-10 03:26:35,683 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-10 03:26:35,711 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-10 03:26:35,711 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 03:26:35,713 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 03:26:35,736 INFO L134 CoverageAnalysis]: Checked inductivity of 5724 backedges. 2783 proven. 2080 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2018-11-10 03:26:35,761 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 03:26:35,761 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-11-10 03:26:35,762 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-11-10 03:26:35,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-11-10 03:26:35,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-11-10 03:26:35,762 INFO L87 Difference]: Start difference. First operand 226 states and 248 transitions. Second operand 35 states. [2018-11-10 03:26:35,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 03:26:35,829 INFO L93 Difference]: Finished difference Result 325 states and 370 transitions. [2018-11-10 03:26:35,829 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-11-10 03:26:35,829 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 225 [2018-11-10 03:26:35,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 03:26:35,830 INFO L225 Difference]: With dead ends: 325 [2018-11-10 03:26:35,830 INFO L226 Difference]: Without dead ends: 231 [2018-11-10 03:26:35,830 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-11-10 03:26:35,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2018-11-10 03:26:35,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 230. [2018-11-10 03:26:35,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2018-11-10 03:26:35,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 252 transitions. [2018-11-10 03:26:35,845 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 252 transitions. Word has length 225 [2018-11-10 03:26:35,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 03:26:35,846 INFO L481 AbstractCegarLoop]: Abstraction has 230 states and 252 transitions. [2018-11-10 03:26:35,846 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-11-10 03:26:35,846 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 252 transitions. [2018-11-10 03:26:35,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2018-11-10 03:26:35,847 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 03:26:35,847 INFO L375 BasicCegarLoop]: trace histogram [55, 55, 54, 33, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 03:26:35,847 INFO L424 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 03:26:35,847 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 03:26:35,847 INFO L82 PathProgramCache]: Analyzing trace with hash 595758996, now seen corresponding path program 33 times [2018-11-10 03:26:35,847 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 03:26:35,848 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 03:26:35,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:35,848 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 03:26:35,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:35,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:26:36,254 INFO L134 CoverageAnalysis]: Checked inductivity of 5940 backedges. 2868 proven. 2211 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2018-11-10 03:26:36,254 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 03:26:36,255 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1b3549e1-c80d-4ae0-9afa-bbf10ee374b7/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 [2018-11-10 03:26:36,260 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-10 03:26:36,321 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 55 check-sat command(s) [2018-11-10 03:26:36,322 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 03:26:36,325 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 03:26:36,971 INFO L134 CoverageAnalysis]: Checked inductivity of 5940 backedges. 4048 proven. 1807 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-11-10 03:26:36,986 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 03:26:36,987 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 70 [2018-11-10 03:26:36,987 INFO L460 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-11-10 03:26:36,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-11-10 03:26:36,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1259, Invalid=3571, Unknown=0, NotChecked=0, Total=4830 [2018-11-10 03:26:36,988 INFO L87 Difference]: Start difference. First operand 230 states and 252 transitions. Second operand 70 states. [2018-11-10 03:26:38,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 03:26:38,015 INFO L93 Difference]: Finished difference Result 1397 states and 1718 transitions. [2018-11-10 03:26:38,015 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-11-10 03:26:38,015 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 229 [2018-11-10 03:26:38,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 03:26:38,018 INFO L225 Difference]: With dead ends: 1397 [2018-11-10 03:26:38,018 INFO L226 Difference]: Without dead ends: 1303 [2018-11-10 03:26:38,022 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4324 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3837, Invalid=14795, Unknown=0, NotChecked=0, Total=18632 [2018-11-10 03:26:38,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1303 states. [2018-11-10 03:26:38,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1303 to 282. [2018-11-10 03:26:38,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2018-11-10 03:26:38,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 316 transitions. [2018-11-10 03:26:38,077 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 316 transitions. Word has length 229 [2018-11-10 03:26:38,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 03:26:38,077 INFO L481 AbstractCegarLoop]: Abstraction has 282 states and 316 transitions. [2018-11-10 03:26:38,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-11-10 03:26:38,078 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 316 transitions. [2018-11-10 03:26:38,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2018-11-10 03:26:38,079 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 03:26:38,079 INFO L375 BasicCegarLoop]: trace histogram [68, 68, 67, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 03:26:38,079 INFO L424 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 03:26:38,079 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 03:26:38,079 INFO L82 PathProgramCache]: Analyzing trace with hash -760881198, now seen corresponding path program 34 times [2018-11-10 03:26:38,079 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 03:26:38,080 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 03:26:38,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:38,080 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 03:26:38,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:38,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:26:38,552 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 4621 proven. 2346 refuted. 0 times theorem prover too weak. 2145 trivial. 0 not checked. [2018-11-10 03:26:38,552 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 03:26:38,552 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1b3549e1-c80d-4ae0-9afa-bbf10ee374b7/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 [2018-11-10 03:26:38,557 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-10 03:26:38,625 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-10 03:26:38,625 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 03:26:38,630 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 03:26:38,716 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 4621 proven. 2346 refuted. 0 times theorem prover too weak. 2145 trivial. 0 not checked. [2018-11-10 03:26:38,741 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 03:26:38,741 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-11-10 03:26:38,742 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-11-10 03:26:38,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-11-10 03:26:38,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-11-10 03:26:38,742 INFO L87 Difference]: Start difference. First operand 282 states and 316 transitions. Second operand 37 states. [2018-11-10 03:26:38,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 03:26:38,891 INFO L93 Difference]: Finished difference Result 429 states and 498 transitions. [2018-11-10 03:26:38,892 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-11-10 03:26:38,892 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 281 [2018-11-10 03:26:38,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 03:26:38,893 INFO L225 Difference]: With dead ends: 429 [2018-11-10 03:26:38,893 INFO L226 Difference]: Without dead ends: 287 [2018-11-10 03:26:38,893 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-11-10 03:26:38,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2018-11-10 03:26:38,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 286. [2018-11-10 03:26:38,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2018-11-10 03:26:38,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 320 transitions. [2018-11-10 03:26:38,929 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 320 transitions. Word has length 281 [2018-11-10 03:26:38,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 03:26:38,929 INFO L481 AbstractCegarLoop]: Abstraction has 286 states and 320 transitions. [2018-11-10 03:26:38,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-11-10 03:26:38,929 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 320 transitions. [2018-11-10 03:26:38,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2018-11-10 03:26:38,930 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 03:26:38,930 INFO L375 BasicCegarLoop]: trace histogram [69, 69, 68, 35, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 03:26:38,931 INFO L424 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 03:26:38,931 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 03:26:38,931 INFO L82 PathProgramCache]: Analyzing trace with hash -344860672, now seen corresponding path program 35 times [2018-11-10 03:26:38,931 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 03:26:38,931 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 03:26:38,931 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:38,932 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 03:26:38,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:38,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:26:39,348 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 4754 proven. 2485 refuted. 0 times theorem prover too weak. 2145 trivial. 0 not checked. [2018-11-10 03:26:39,348 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 03:26:39,348 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1b3549e1-c80d-4ae0-9afa-bbf10ee374b7/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 [2018-11-10 03:26:39,354 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-10 03:26:39,437 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 69 check-sat command(s) [2018-11-10 03:26:39,437 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 03:26:39,440 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 03:26:39,477 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 4754 proven. 2485 refuted. 0 times theorem prover too weak. 2145 trivial. 0 not checked. [2018-11-10 03:26:39,493 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 03:26:39,494 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-11-10 03:26:39,494 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-11-10 03:26:39,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-11-10 03:26:39,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-11-10 03:26:39,495 INFO L87 Difference]: Start difference. First operand 286 states and 320 transitions. Second operand 38 states. [2018-11-10 03:26:39,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 03:26:39,588 INFO L93 Difference]: Finished difference Result 433 states and 502 transitions. [2018-11-10 03:26:39,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-11-10 03:26:39,588 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 285 [2018-11-10 03:26:39,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 03:26:39,589 INFO L225 Difference]: With dead ends: 433 [2018-11-10 03:26:39,589 INFO L226 Difference]: Without dead ends: 291 [2018-11-10 03:26:39,589 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 286 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-11-10 03:26:39,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2018-11-10 03:26:39,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 290. [2018-11-10 03:26:39,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 290 states. [2018-11-10 03:26:39,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 324 transitions. [2018-11-10 03:26:39,636 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 324 transitions. Word has length 285 [2018-11-10 03:26:39,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 03:26:39,636 INFO L481 AbstractCegarLoop]: Abstraction has 290 states and 324 transitions. [2018-11-10 03:26:39,636 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-11-10 03:26:39,636 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 324 transitions. [2018-11-10 03:26:39,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2018-11-10 03:26:39,637 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 03:26:39,637 INFO L375 BasicCegarLoop]: trace histogram [70, 70, 69, 36, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 03:26:39,638 INFO L424 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 03:26:39,638 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 03:26:39,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1342834990, now seen corresponding path program 36 times [2018-11-10 03:26:39,638 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 03:26:39,638 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 03:26:39,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:39,638 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 03:26:39,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:39,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:26:40,080 INFO L134 CoverageAnalysis]: Checked inductivity of 9660 backedges. 4887 proven. 2628 refuted. 0 times theorem prover too weak. 2145 trivial. 0 not checked. [2018-11-10 03:26:40,080 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 03:26:40,080 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1b3549e1-c80d-4ae0-9afa-bbf10ee374b7/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 [2018-11-10 03:26:40,085 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-10 03:26:40,165 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 68 check-sat command(s) [2018-11-10 03:26:40,166 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 03:26:40,169 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 03:26:40,207 INFO L134 CoverageAnalysis]: Checked inductivity of 9660 backedges. 4887 proven. 2628 refuted. 0 times theorem prover too weak. 2145 trivial. 0 not checked. [2018-11-10 03:26:40,233 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 03:26:40,233 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-11-10 03:26:40,233 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-11-10 03:26:40,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-11-10 03:26:40,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-11-10 03:26:40,234 INFO L87 Difference]: Start difference. First operand 290 states and 324 transitions. Second operand 39 states. [2018-11-10 03:26:40,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 03:26:40,342 INFO L93 Difference]: Finished difference Result 437 states and 506 transitions. [2018-11-10 03:26:40,343 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-11-10 03:26:40,343 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 289 [2018-11-10 03:26:40,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 03:26:40,344 INFO L225 Difference]: With dead ends: 437 [2018-11-10 03:26:40,344 INFO L226 Difference]: Without dead ends: 295 [2018-11-10 03:26:40,344 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 290 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-11-10 03:26:40,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2018-11-10 03:26:40,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 294. [2018-11-10 03:26:40,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2018-11-10 03:26:40,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 328 transitions. [2018-11-10 03:26:40,379 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 328 transitions. Word has length 289 [2018-11-10 03:26:40,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 03:26:40,380 INFO L481 AbstractCegarLoop]: Abstraction has 294 states and 328 transitions. [2018-11-10 03:26:40,380 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-11-10 03:26:40,380 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 328 transitions. [2018-11-10 03:26:40,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2018-11-10 03:26:40,381 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 03:26:40,381 INFO L375 BasicCegarLoop]: trace histogram [71, 71, 70, 37, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 03:26:40,381 INFO L424 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 03:26:40,381 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 03:26:40,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1571418972, now seen corresponding path program 37 times [2018-11-10 03:26:40,382 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 03:26:40,382 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 03:26:40,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:40,382 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 03:26:40,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:40,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:26:40,817 INFO L134 CoverageAnalysis]: Checked inductivity of 9940 backedges. 5020 proven. 2775 refuted. 0 times theorem prover too weak. 2145 trivial. 0 not checked. [2018-11-10 03:26:40,817 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 03:26:40,817 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1b3549e1-c80d-4ae0-9afa-bbf10ee374b7/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 [2018-11-10 03:26:40,823 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 03:26:40,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:26:40,862 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 03:26:40,907 INFO L134 CoverageAnalysis]: Checked inductivity of 9940 backedges. 5020 proven. 2775 refuted. 0 times theorem prover too weak. 2145 trivial. 0 not checked. [2018-11-10 03:26:40,923 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 03:26:40,924 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-11-10 03:26:40,924 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-11-10 03:26:40,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-11-10 03:26:40,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-11-10 03:26:40,925 INFO L87 Difference]: Start difference. First operand 294 states and 328 transitions. Second operand 40 states. [2018-11-10 03:26:41,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 03:26:41,038 INFO L93 Difference]: Finished difference Result 441 states and 510 transitions. [2018-11-10 03:26:41,039 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-11-10 03:26:41,039 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 293 [2018-11-10 03:26:41,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 03:26:41,040 INFO L225 Difference]: With dead ends: 441 [2018-11-10 03:26:41,040 INFO L226 Difference]: Without dead ends: 299 [2018-11-10 03:26:41,041 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 294 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-11-10 03:26:41,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2018-11-10 03:26:41,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 298. [2018-11-10 03:26:41,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 298 states. [2018-11-10 03:26:41,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 332 transitions. [2018-11-10 03:26:41,073 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 332 transitions. Word has length 293 [2018-11-10 03:26:41,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 03:26:41,073 INFO L481 AbstractCegarLoop]: Abstraction has 298 states and 332 transitions. [2018-11-10 03:26:41,074 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-11-10 03:26:41,074 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 332 transitions. [2018-11-10 03:26:41,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2018-11-10 03:26:41,075 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 03:26:41,075 INFO L375 BasicCegarLoop]: trace histogram [72, 72, 71, 38, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 03:26:41,075 INFO L424 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 03:26:41,075 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 03:26:41,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1741493898, now seen corresponding path program 38 times [2018-11-10 03:26:41,075 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 03:26:41,075 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 03:26:41,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:41,076 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 03:26:41,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:41,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:26:41,579 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 5153 proven. 2926 refuted. 0 times theorem prover too weak. 2145 trivial. 0 not checked. [2018-11-10 03:26:41,580 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 03:26:41,580 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1b3549e1-c80d-4ae0-9afa-bbf10ee374b7/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 [2018-11-10 03:26:41,586 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-10 03:26:41,628 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-10 03:26:41,628 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 03:26:41,631 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 03:26:41,691 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 5153 proven. 2926 refuted. 0 times theorem prover too weak. 2145 trivial. 0 not checked. [2018-11-10 03:26:41,717 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 03:26:41,717 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-11-10 03:26:41,718 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-11-10 03:26:41,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-11-10 03:26:41,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-11-10 03:26:41,718 INFO L87 Difference]: Start difference. First operand 298 states and 332 transitions. Second operand 41 states. [2018-11-10 03:26:41,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 03:26:41,875 INFO L93 Difference]: Finished difference Result 445 states and 514 transitions. [2018-11-10 03:26:41,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-11-10 03:26:41,876 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 297 [2018-11-10 03:26:41,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 03:26:41,877 INFO L225 Difference]: With dead ends: 445 [2018-11-10 03:26:41,877 INFO L226 Difference]: Without dead ends: 303 [2018-11-10 03:26:41,877 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-11-10 03:26:41,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2018-11-10 03:26:41,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 302. [2018-11-10 03:26:41,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 302 states. [2018-11-10 03:26:41,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 336 transitions. [2018-11-10 03:26:41,938 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 336 transitions. Word has length 297 [2018-11-10 03:26:41,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 03:26:41,938 INFO L481 AbstractCegarLoop]: Abstraction has 302 states and 336 transitions. [2018-11-10 03:26:41,939 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-11-10 03:26:41,939 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 336 transitions. [2018-11-10 03:26:41,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2018-11-10 03:26:41,940 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 03:26:41,940 INFO L375 BasicCegarLoop]: trace histogram [73, 73, 72, 39, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 03:26:41,940 INFO L424 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 03:26:41,940 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 03:26:41,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1741753672, now seen corresponding path program 39 times [2018-11-10 03:26:41,940 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 03:26:41,940 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 03:26:41,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:41,945 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 03:26:41,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:41,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:26:42,499 INFO L134 CoverageAnalysis]: Checked inductivity of 10512 backedges. 5286 proven. 3081 refuted. 0 times theorem prover too weak. 2145 trivial. 0 not checked. [2018-11-10 03:26:42,499 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 03:26:42,499 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1b3549e1-c80d-4ae0-9afa-bbf10ee374b7/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 [2018-11-10 03:26:42,504 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-10 03:26:42,606 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 73 check-sat command(s) [2018-11-10 03:26:42,606 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 03:26:42,609 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 03:26:42,652 INFO L134 CoverageAnalysis]: Checked inductivity of 10512 backedges. 5286 proven. 3081 refuted. 0 times theorem prover too weak. 2145 trivial. 0 not checked. [2018-11-10 03:26:42,668 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 03:26:42,668 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-11-10 03:26:42,668 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-11-10 03:26:42,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-11-10 03:26:42,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-11-10 03:26:42,669 INFO L87 Difference]: Start difference. First operand 302 states and 336 transitions. Second operand 42 states. [2018-11-10 03:26:42,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 03:26:42,760 INFO L93 Difference]: Finished difference Result 449 states and 518 transitions. [2018-11-10 03:26:42,760 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-11-10 03:26:42,760 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 301 [2018-11-10 03:26:42,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 03:26:42,761 INFO L225 Difference]: With dead ends: 449 [2018-11-10 03:26:42,761 INFO L226 Difference]: Without dead ends: 307 [2018-11-10 03:26:42,762 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 302 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-11-10 03:26:42,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2018-11-10 03:26:42,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 306. [2018-11-10 03:26:42,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 306 states. [2018-11-10 03:26:42,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 340 transitions. [2018-11-10 03:26:42,794 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 340 transitions. Word has length 301 [2018-11-10 03:26:42,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 03:26:42,794 INFO L481 AbstractCegarLoop]: Abstraction has 306 states and 340 transitions. [2018-11-10 03:26:42,794 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-11-10 03:26:42,794 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 340 transitions. [2018-11-10 03:26:42,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2018-11-10 03:26:42,796 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 03:26:42,796 INFO L375 BasicCegarLoop]: trace histogram [74, 74, 73, 40, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 03:26:42,796 INFO L424 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 03:26:42,796 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 03:26:42,796 INFO L82 PathProgramCache]: Analyzing trace with hash -825554970, now seen corresponding path program 40 times [2018-11-10 03:26:42,796 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 03:26:42,796 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 03:26:42,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:42,797 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 03:26:42,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:42,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:26:43,256 INFO L134 CoverageAnalysis]: Checked inductivity of 10804 backedges. 5419 proven. 3240 refuted. 0 times theorem prover too weak. 2145 trivial. 0 not checked. [2018-11-10 03:26:43,256 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 03:26:43,256 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1b3549e1-c80d-4ae0-9afa-bbf10ee374b7/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 [2018-11-10 03:26:43,263 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-10 03:26:43,297 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-10 03:26:43,298 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 03:26:43,300 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 03:26:43,357 INFO L134 CoverageAnalysis]: Checked inductivity of 10804 backedges. 5419 proven. 3240 refuted. 0 times theorem prover too weak. 2145 trivial. 0 not checked. [2018-11-10 03:26:43,382 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 03:26:43,382 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-11-10 03:26:43,382 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-11-10 03:26:43,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-11-10 03:26:43,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-11-10 03:26:43,383 INFO L87 Difference]: Start difference. First operand 306 states and 340 transitions. Second operand 43 states. [2018-11-10 03:26:43,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 03:26:43,477 INFO L93 Difference]: Finished difference Result 453 states and 522 transitions. [2018-11-10 03:26:43,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-11-10 03:26:43,478 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 305 [2018-11-10 03:26:43,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 03:26:43,479 INFO L225 Difference]: With dead ends: 453 [2018-11-10 03:26:43,479 INFO L226 Difference]: Without dead ends: 311 [2018-11-10 03:26:43,480 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-11-10 03:26:43,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2018-11-10 03:26:43,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 310. [2018-11-10 03:26:43,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 310 states. [2018-11-10 03:26:43,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 344 transitions. [2018-11-10 03:26:43,513 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 344 transitions. Word has length 305 [2018-11-10 03:26:43,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 03:26:43,513 INFO L481 AbstractCegarLoop]: Abstraction has 310 states and 344 transitions. [2018-11-10 03:26:43,513 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-11-10 03:26:43,513 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 344 transitions. [2018-11-10 03:26:43,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2018-11-10 03:26:43,514 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 03:26:43,515 INFO L375 BasicCegarLoop]: trace histogram [75, 75, 74, 41, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 03:26:43,515 INFO L424 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 03:26:43,515 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 03:26:43,515 INFO L82 PathProgramCache]: Analyzing trace with hash -2116233708, now seen corresponding path program 41 times [2018-11-10 03:26:43,515 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 03:26:43,515 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 03:26:43,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:43,516 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 03:26:43,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:43,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:26:44,015 INFO L134 CoverageAnalysis]: Checked inductivity of 11100 backedges. 5552 proven. 3403 refuted. 0 times theorem prover too weak. 2145 trivial. 0 not checked. [2018-11-10 03:26:44,015 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 03:26:44,015 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1b3549e1-c80d-4ae0-9afa-bbf10ee374b7/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 [2018-11-10 03:26:44,021 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-10 03:26:44,114 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 75 check-sat command(s) [2018-11-10 03:26:44,114 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 03:26:44,116 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 03:26:44,154 INFO L134 CoverageAnalysis]: Checked inductivity of 11100 backedges. 5552 proven. 3403 refuted. 0 times theorem prover too weak. 2145 trivial. 0 not checked. [2018-11-10 03:26:44,169 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 03:26:44,169 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-11-10 03:26:44,170 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-11-10 03:26:44,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-11-10 03:26:44,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-11-10 03:26:44,170 INFO L87 Difference]: Start difference. First operand 310 states and 344 transitions. Second operand 44 states. [2018-11-10 03:26:44,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 03:26:44,249 INFO L93 Difference]: Finished difference Result 457 states and 526 transitions. [2018-11-10 03:26:44,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-11-10 03:26:44,249 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 309 [2018-11-10 03:26:44,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 03:26:44,249 INFO L225 Difference]: With dead ends: 457 [2018-11-10 03:26:44,250 INFO L226 Difference]: Without dead ends: 315 [2018-11-10 03:26:44,250 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 310 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-11-10 03:26:44,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2018-11-10 03:26:44,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 314. [2018-11-10 03:26:44,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 314 states. [2018-11-10 03:26:44,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 348 transitions. [2018-11-10 03:26:44,282 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 348 transitions. Word has length 309 [2018-11-10 03:26:44,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 03:26:44,282 INFO L481 AbstractCegarLoop]: Abstraction has 314 states and 348 transitions. [2018-11-10 03:26:44,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-11-10 03:26:44,282 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 348 transitions. [2018-11-10 03:26:44,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2018-11-10 03:26:44,283 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 03:26:44,283 INFO L375 BasicCegarLoop]: trace histogram [76, 76, 75, 42, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 03:26:44,283 INFO L424 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 03:26:44,283 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 03:26:44,284 INFO L82 PathProgramCache]: Analyzing trace with hash -1646273214, now seen corresponding path program 42 times [2018-11-10 03:26:44,284 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 03:26:44,284 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 03:26:44,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:44,284 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 03:26:44,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:44,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:26:44,796 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 5685 proven. 3570 refuted. 0 times theorem prover too weak. 2145 trivial. 0 not checked. [2018-11-10 03:26:44,796 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 03:26:44,796 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1b3549e1-c80d-4ae0-9afa-bbf10ee374b7/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 [2018-11-10 03:26:44,802 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-10 03:26:44,888 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2018-11-10 03:26:44,888 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 03:26:44,890 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 03:26:44,929 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 5685 proven. 3570 refuted. 0 times theorem prover too weak. 2145 trivial. 0 not checked. [2018-11-10 03:26:44,955 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 03:26:44,955 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-11-10 03:26:44,955 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-11-10 03:26:44,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-11-10 03:26:44,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-11-10 03:26:44,956 INFO L87 Difference]: Start difference. First operand 314 states and 348 transitions. Second operand 45 states. [2018-11-10 03:26:45,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 03:26:45,053 INFO L93 Difference]: Finished difference Result 461 states and 530 transitions. [2018-11-10 03:26:45,053 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-11-10 03:26:45,054 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 313 [2018-11-10 03:26:45,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 03:26:45,054 INFO L225 Difference]: With dead ends: 461 [2018-11-10 03:26:45,055 INFO L226 Difference]: Without dead ends: 319 [2018-11-10 03:26:45,055 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 314 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-11-10 03:26:45,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2018-11-10 03:26:45,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 318. [2018-11-10 03:26:45,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 318 states. [2018-11-10 03:26:45,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 352 transitions. [2018-11-10 03:26:45,098 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 352 transitions. Word has length 313 [2018-11-10 03:26:45,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 03:26:45,098 INFO L481 AbstractCegarLoop]: Abstraction has 318 states and 352 transitions. [2018-11-10 03:26:45,098 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-11-10 03:26:45,098 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 352 transitions. [2018-11-10 03:26:45,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2018-11-10 03:26:45,099 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 03:26:45,100 INFO L375 BasicCegarLoop]: trace histogram [77, 77, 76, 43, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 03:26:45,100 INFO L424 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 03:26:45,100 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 03:26:45,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1703910768, now seen corresponding path program 43 times [2018-11-10 03:26:45,100 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 03:26:45,100 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 03:26:45,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:45,101 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 03:26:45,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:45,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:26:45,703 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 5818 proven. 3741 refuted. 0 times theorem prover too weak. 2145 trivial. 0 not checked. [2018-11-10 03:26:45,703 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 03:26:45,703 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1b3549e1-c80d-4ae0-9afa-bbf10ee374b7/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 [2018-11-10 03:26:45,711 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 03:26:45,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:26:45,752 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 03:26:45,791 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 5818 proven. 3741 refuted. 0 times theorem prover too weak. 2145 trivial. 0 not checked. [2018-11-10 03:26:45,806 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 03:26:45,807 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-11-10 03:26:45,807 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-11-10 03:26:45,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-11-10 03:26:45,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-11-10 03:26:45,808 INFO L87 Difference]: Start difference. First operand 318 states and 352 transitions. Second operand 46 states. [2018-11-10 03:26:45,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 03:26:45,926 INFO L93 Difference]: Finished difference Result 465 states and 534 transitions. [2018-11-10 03:26:45,927 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-11-10 03:26:45,927 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 317 [2018-11-10 03:26:45,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 03:26:45,927 INFO L225 Difference]: With dead ends: 465 [2018-11-10 03:26:45,928 INFO L226 Difference]: Without dead ends: 323 [2018-11-10 03:26:45,928 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-11-10 03:26:45,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2018-11-10 03:26:45,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 322. [2018-11-10 03:26:45,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 322 states. [2018-11-10 03:26:45,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 356 transitions. [2018-11-10 03:26:45,987 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 356 transitions. Word has length 317 [2018-11-10 03:26:45,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 03:26:45,987 INFO L481 AbstractCegarLoop]: Abstraction has 322 states and 356 transitions. [2018-11-10 03:26:45,987 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-11-10 03:26:45,987 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 356 transitions. [2018-11-10 03:26:45,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2018-11-10 03:26:45,988 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 03:26:45,988 INFO L375 BasicCegarLoop]: trace histogram [78, 78, 77, 44, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 03:26:45,989 INFO L424 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 03:26:45,989 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 03:26:45,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1374131870, now seen corresponding path program 44 times [2018-11-10 03:26:45,989 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 03:26:45,989 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 03:26:45,990 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:45,990 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 03:26:45,990 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:46,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:26:46,555 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 5951 proven. 3916 refuted. 0 times theorem prover too weak. 2145 trivial. 0 not checked. [2018-11-10 03:26:46,555 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 03:26:46,555 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1b3549e1-c80d-4ae0-9afa-bbf10ee374b7/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 [2018-11-10 03:26:46,560 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-10 03:26:46,597 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-10 03:26:46,597 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 03:26:46,600 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 03:26:46,640 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 5951 proven. 3916 refuted. 0 times theorem prover too weak. 2145 trivial. 0 not checked. [2018-11-10 03:26:46,665 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 03:26:46,666 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-11-10 03:26:46,666 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-11-10 03:26:46,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-11-10 03:26:46,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-11-10 03:26:46,667 INFO L87 Difference]: Start difference. First operand 322 states and 356 transitions. Second operand 47 states. [2018-11-10 03:26:46,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 03:26:46,758 INFO L93 Difference]: Finished difference Result 469 states and 538 transitions. [2018-11-10 03:26:46,758 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-11-10 03:26:46,758 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 321 [2018-11-10 03:26:46,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 03:26:46,759 INFO L225 Difference]: With dead ends: 469 [2018-11-10 03:26:46,759 INFO L226 Difference]: Without dead ends: 327 [2018-11-10 03:26:46,759 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 322 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-11-10 03:26:46,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2018-11-10 03:26:46,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 326. [2018-11-10 03:26:46,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 326 states. [2018-11-10 03:26:46,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 360 transitions. [2018-11-10 03:26:46,791 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 360 transitions. Word has length 321 [2018-11-10 03:26:46,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 03:26:46,791 INFO L481 AbstractCegarLoop]: Abstraction has 326 states and 360 transitions. [2018-11-10 03:26:46,791 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-11-10 03:26:46,791 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 360 transitions. [2018-11-10 03:26:46,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2018-11-10 03:26:46,792 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 03:26:46,793 INFO L375 BasicCegarLoop]: trace histogram [79, 79, 78, 45, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 03:26:46,793 INFO L424 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 03:26:46,793 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 03:26:46,793 INFO L82 PathProgramCache]: Analyzing trace with hash -232568628, now seen corresponding path program 45 times [2018-11-10 03:26:46,793 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 03:26:46,793 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 03:26:46,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:46,794 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 03:26:46,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:46,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:26:47,354 INFO L134 CoverageAnalysis]: Checked inductivity of 12324 backedges. 6084 proven. 4095 refuted. 0 times theorem prover too weak. 2145 trivial. 0 not checked. [2018-11-10 03:26:47,354 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 03:26:47,354 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1b3549e1-c80d-4ae0-9afa-bbf10ee374b7/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 [2018-11-10 03:26:47,361 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-10 03:26:47,471 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 79 check-sat command(s) [2018-11-10 03:26:47,472 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 03:26:47,475 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 03:26:48,515 INFO L134 CoverageAnalysis]: Checked inductivity of 12324 backedges. 7768 proven. 4423 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2018-11-10 03:26:48,531 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 03:26:48,531 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 94 [2018-11-10 03:26:48,531 INFO L460 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-11-10 03:26:48,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-11-10 03:26:48,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2255, Invalid=6487, Unknown=0, NotChecked=0, Total=8742 [2018-11-10 03:26:48,533 INFO L87 Difference]: Start difference. First operand 326 states and 360 transitions. Second operand 94 states. [2018-11-10 03:26:50,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 03:26:50,406 INFO L93 Difference]: Finished difference Result 2117 states and 2606 transitions. [2018-11-10 03:26:50,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2018-11-10 03:26:50,407 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 325 [2018-11-10 03:26:50,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 03:26:50,410 INFO L225 Difference]: With dead ends: 2117 [2018-11-10 03:26:50,410 INFO L226 Difference]: Without dead ends: 1975 [2018-11-10 03:26:50,411 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 463 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8056 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=6849, Invalid=27191, Unknown=0, NotChecked=0, Total=34040 [2018-11-10 03:26:50,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1975 states. [2018-11-10 03:26:50,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1975 to 378. [2018-11-10 03:26:50,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 378 states. [2018-11-10 03:26:50,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 424 transitions. [2018-11-10 03:26:50,493 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 424 transitions. Word has length 325 [2018-11-10 03:26:50,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 03:26:50,493 INFO L481 AbstractCegarLoop]: Abstraction has 378 states and 424 transitions. [2018-11-10 03:26:50,493 INFO L482 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-11-10 03:26:50,493 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 424 transitions. [2018-11-10 03:26:50,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2018-11-10 03:26:50,495 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 03:26:50,495 INFO L375 BasicCegarLoop]: trace histogram [92, 92, 91, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 03:26:50,495 INFO L424 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 03:26:50,495 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 03:26:50,495 INFO L82 PathProgramCache]: Analyzing trace with hash -597581558, now seen corresponding path program 46 times [2018-11-10 03:26:50,495 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 03:26:50,495 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 03:26:50,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:50,496 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 03:26:50,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:50,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:26:51,072 INFO L134 CoverageAnalysis]: Checked inductivity of 16744 backedges. 8461 proven. 4278 refuted. 0 times theorem prover too weak. 4005 trivial. 0 not checked. [2018-11-10 03:26:51,073 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 03:26:51,073 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1b3549e1-c80d-4ae0-9afa-bbf10ee374b7/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 [2018-11-10 03:26:51,079 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-10 03:26:51,126 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-10 03:26:51,126 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 03:26:51,128 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 03:26:51,180 INFO L134 CoverageAnalysis]: Checked inductivity of 16744 backedges. 8461 proven. 4278 refuted. 0 times theorem prover too weak. 4005 trivial. 0 not checked. [2018-11-10 03:26:51,195 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 03:26:51,196 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-11-10 03:26:51,196 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-11-10 03:26:51,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-11-10 03:26:51,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-11-10 03:26:51,196 INFO L87 Difference]: Start difference. First operand 378 states and 424 transitions. Second operand 49 states. [2018-11-10 03:26:51,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 03:26:51,346 INFO L93 Difference]: Finished difference Result 573 states and 666 transitions. [2018-11-10 03:26:51,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-11-10 03:26:51,347 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 377 [2018-11-10 03:26:51,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 03:26:51,348 INFO L225 Difference]: With dead ends: 573 [2018-11-10 03:26:51,348 INFO L226 Difference]: Without dead ends: 383 [2018-11-10 03:26:51,348 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-11-10 03:26:51,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2018-11-10 03:26:51,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 382. [2018-11-10 03:26:51,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 382 states. [2018-11-10 03:26:51,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 428 transitions. [2018-11-10 03:26:51,432 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 428 transitions. Word has length 377 [2018-11-10 03:26:51,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 03:26:51,433 INFO L481 AbstractCegarLoop]: Abstraction has 382 states and 428 transitions. [2018-11-10 03:26:51,433 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-11-10 03:26:51,433 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 428 transitions. [2018-11-10 03:26:51,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 382 [2018-11-10 03:26:51,434 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 03:26:51,434 INFO L375 BasicCegarLoop]: trace histogram [93, 93, 92, 47, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 03:26:51,434 INFO L424 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 03:26:51,434 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 03:26:51,434 INFO L82 PathProgramCache]: Analyzing trace with hash 1048113464, now seen corresponding path program 47 times [2018-11-10 03:26:51,434 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 03:26:51,434 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 03:26:51,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:51,435 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 03:26:51,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:51,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:26:52,044 INFO L134 CoverageAnalysis]: Checked inductivity of 17112 backedges. 8642 proven. 4465 refuted. 0 times theorem prover too weak. 4005 trivial. 0 not checked. [2018-11-10 03:26:52,044 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 03:26:52,044 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1b3549e1-c80d-4ae0-9afa-bbf10ee374b7/bin-2019/uautomizer/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 03:26:52,050 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-10 03:26:52,182 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 93 check-sat command(s) [2018-11-10 03:26:52,182 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 03:26:52,185 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 03:26:52,238 INFO L134 CoverageAnalysis]: Checked inductivity of 17112 backedges. 8642 proven. 4465 refuted. 0 times theorem prover too weak. 4005 trivial. 0 not checked. [2018-11-10 03:26:52,258 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 03:26:52,258 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-11-10 03:26:52,259 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-11-10 03:26:52,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-11-10 03:26:52,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-11-10 03:26:52,259 INFO L87 Difference]: Start difference. First operand 382 states and 428 transitions. Second operand 50 states. [2018-11-10 03:26:52,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 03:26:52,430 INFO L93 Difference]: Finished difference Result 577 states and 670 transitions. [2018-11-10 03:26:52,430 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-11-10 03:26:52,430 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 381 [2018-11-10 03:26:52,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 03:26:52,431 INFO L225 Difference]: With dead ends: 577 [2018-11-10 03:26:52,431 INFO L226 Difference]: Without dead ends: 387 [2018-11-10 03:26:52,432 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 382 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-11-10 03:26:52,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2018-11-10 03:26:52,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 386. [2018-11-10 03:26:52,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 386 states. [2018-11-10 03:26:52,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 432 transitions. [2018-11-10 03:26:52,511 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 432 transitions. Word has length 381 [2018-11-10 03:26:52,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 03:26:52,511 INFO L481 AbstractCegarLoop]: Abstraction has 386 states and 432 transitions. [2018-11-10 03:26:52,511 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-11-10 03:26:52,511 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 432 transitions. [2018-11-10 03:26:52,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 386 [2018-11-10 03:26:52,513 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 03:26:52,513 INFO L375 BasicCegarLoop]: trace histogram [94, 94, 93, 48, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 03:26:52,513 INFO L424 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 03:26:52,513 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 03:26:52,513 INFO L82 PathProgramCache]: Analyzing trace with hash 653294182, now seen corresponding path program 48 times [2018-11-10 03:26:52,513 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 03:26:52,513 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 03:26:52,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:52,514 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 03:26:52,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:52,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:26:53,140 INFO L134 CoverageAnalysis]: Checked inductivity of 17484 backedges. 8823 proven. 4656 refuted. 0 times theorem prover too weak. 4005 trivial. 0 not checked. [2018-11-10 03:26:53,140 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 03:26:53,140 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1b3549e1-c80d-4ae0-9afa-bbf10ee374b7/bin-2019/uautomizer/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 03:26:53,146 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-10 03:26:53,269 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 92 check-sat command(s) [2018-11-10 03:26:53,269 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 03:26:53,272 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 03:26:53,326 INFO L134 CoverageAnalysis]: Checked inductivity of 17484 backedges. 8823 proven. 4656 refuted. 0 times theorem prover too weak. 4005 trivial. 0 not checked. [2018-11-10 03:26:53,342 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 03:26:53,342 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-11-10 03:26:53,342 INFO L460 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-11-10 03:26:53,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-11-10 03:26:53,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-11-10 03:26:53,343 INFO L87 Difference]: Start difference. First operand 386 states and 432 transitions. Second operand 51 states. [2018-11-10 03:26:53,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 03:26:53,492 INFO L93 Difference]: Finished difference Result 581 states and 674 transitions. [2018-11-10 03:26:53,492 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-11-10 03:26:53,492 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 385 [2018-11-10 03:26:53,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 03:26:53,493 INFO L225 Difference]: With dead ends: 581 [2018-11-10 03:26:53,494 INFO L226 Difference]: Without dead ends: 391 [2018-11-10 03:26:53,494 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 386 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-11-10 03:26:53,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2018-11-10 03:26:53,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 390. [2018-11-10 03:26:53,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 390 states. [2018-11-10 03:26:53,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 436 transitions. [2018-11-10 03:26:53,573 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 436 transitions. Word has length 385 [2018-11-10 03:26:53,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 03:26:53,573 INFO L481 AbstractCegarLoop]: Abstraction has 390 states and 436 transitions. [2018-11-10 03:26:53,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-11-10 03:26:53,573 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 436 transitions. [2018-11-10 03:26:53,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2018-11-10 03:26:53,575 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 03:26:53,575 INFO L375 BasicCegarLoop]: trace histogram [95, 95, 94, 49, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 03:26:53,575 INFO L424 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 03:26:53,575 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 03:26:53,575 INFO L82 PathProgramCache]: Analyzing trace with hash -1996243820, now seen corresponding path program 49 times [2018-11-10 03:26:53,575 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 03:26:53,576 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 03:26:53,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:53,576 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 03:26:53,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:53,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:26:54,199 INFO L134 CoverageAnalysis]: Checked inductivity of 17860 backedges. 9004 proven. 4851 refuted. 0 times theorem prover too weak. 4005 trivial. 0 not checked. [2018-11-10 03:26:54,200 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 03:26:54,200 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1b3549e1-c80d-4ae0-9afa-bbf10ee374b7/bin-2019/uautomizer/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 03:26:54,206 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 03:26:54,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:26:54,261 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 03:26:54,316 INFO L134 CoverageAnalysis]: Checked inductivity of 17860 backedges. 9004 proven. 4851 refuted. 0 times theorem prover too weak. 4005 trivial. 0 not checked. [2018-11-10 03:26:54,332 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 03:26:54,332 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-11-10 03:26:54,332 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-11-10 03:26:54,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-11-10 03:26:54,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-11-10 03:26:54,333 INFO L87 Difference]: Start difference. First operand 390 states and 436 transitions. Second operand 52 states. [2018-11-10 03:26:54,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 03:26:54,470 INFO L93 Difference]: Finished difference Result 628 states and 721 transitions. [2018-11-10 03:26:54,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-11-10 03:26:54,471 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 389 [2018-11-10 03:26:54,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 03:26:54,472 INFO L225 Difference]: With dead ends: 628 [2018-11-10 03:26:54,472 INFO L226 Difference]: Without dead ends: 438 [2018-11-10 03:26:54,472 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 390 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-11-10 03:26:54,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2018-11-10 03:26:54,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 394. [2018-11-10 03:26:54,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 394 states. [2018-11-10 03:26:54,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 440 transitions. [2018-11-10 03:26:54,550 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 440 transitions. Word has length 389 [2018-11-10 03:26:54,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 03:26:54,550 INFO L481 AbstractCegarLoop]: Abstraction has 394 states and 440 transitions. [2018-11-10 03:26:54,550 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-11-10 03:26:54,550 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 440 transitions. [2018-11-10 03:26:54,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 394 [2018-11-10 03:26:54,551 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 03:26:54,551 INFO L375 BasicCegarLoop]: trace histogram [96, 96, 95, 50, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 03:26:54,551 INFO L424 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 03:26:54,551 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 03:26:54,552 INFO L82 PathProgramCache]: Analyzing trace with hash 1311651778, now seen corresponding path program 50 times [2018-11-10 03:26:54,552 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 03:26:54,552 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 03:26:54,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:54,552 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 03:26:54,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:54,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:26:55,324 INFO L134 CoverageAnalysis]: Checked inductivity of 18240 backedges. 9868 proven. 8191 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2018-11-10 03:26:55,324 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 03:26:55,324 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1b3549e1-c80d-4ae0-9afa-bbf10ee374b7/bin-2019/uautomizer/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 03:26:55,329 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-10 03:26:55,376 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-10 03:26:55,376 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 03:26:55,379 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 03:26:55,504 INFO L134 CoverageAnalysis]: Checked inductivity of 18240 backedges. 9868 proven. 8191 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2018-11-10 03:26:55,530 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 03:26:55,530 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-11-10 03:26:55,530 INFO L460 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-11-10 03:26:55,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-11-10 03:26:55,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-11-10 03:26:55,531 INFO L87 Difference]: Start difference. First operand 394 states and 440 transitions. Second operand 53 states. [2018-11-10 03:26:56,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 03:26:56,116 INFO L93 Difference]: Finished difference Result 1324 states and 1604 transitions. [2018-11-10 03:26:56,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-11-10 03:26:56,116 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 393 [2018-11-10 03:26:56,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 03:26:56,120 INFO L225 Difference]: With dead ends: 1324 [2018-11-10 03:26:56,120 INFO L226 Difference]: Without dead ends: 1319 [2018-11-10 03:26:56,121 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 491 GetRequests, 440 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-11-10 03:26:56,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1319 states. [2018-11-10 03:26:56,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1319 to 414. [2018-11-10 03:26:56,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 414 states. [2018-11-10 03:26:56,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 465 transitions. [2018-11-10 03:26:56,240 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 465 transitions. Word has length 393 [2018-11-10 03:26:56,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 03:26:56,241 INFO L481 AbstractCegarLoop]: Abstraction has 414 states and 465 transitions. [2018-11-10 03:26:56,241 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-11-10 03:26:56,241 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 465 transitions. [2018-11-10 03:26:56,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 414 [2018-11-10 03:26:56,242 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 03:26:56,243 INFO L375 BasicCegarLoop]: trace histogram [101, 101, 100, 51, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 03:26:56,243 INFO L424 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 03:26:56,243 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 03:26:56,243 INFO L82 PathProgramCache]: Analyzing trace with hash 2099862750, now seen corresponding path program 51 times [2018-11-10 03:26:56,243 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 03:26:56,243 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 03:26:56,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:56,244 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 03:26:56,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:26:56,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:26:57,297 INFO L134 CoverageAnalysis]: Checked inductivity of 20200 backedges. 10198 proven. 5151 refuted. 0 times theorem prover too weak. 4851 trivial. 0 not checked. [2018-11-10 03:26:57,297 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 03:26:57,297 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1b3549e1-c80d-4ae0-9afa-bbf10ee374b7/bin-2019/uautomizer/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 03:26:57,302 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-10 03:26:57,393 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 69 check-sat command(s) [2018-11-10 03:26:57,393 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 03:26:57,397 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 03:26:57,555 INFO L134 CoverageAnalysis]: Checked inductivity of 20200 backedges. 10198 proven. 5151 refuted. 0 times theorem prover too weak. 4851 trivial. 0 not checked. [2018-11-10 03:26:57,571 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 03:26:57,572 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-11-10 03:26:57,572 INFO L460 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-11-10 03:26:57,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-11-10 03:26:57,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=3079, Unknown=0, NotChecked=0, Total=3192 [2018-11-10 03:26:57,573 INFO L87 Difference]: Start difference. First operand 414 states and 465 transitions. Second operand 57 states. [2018-11-10 03:27:01,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 03:27:01,908 INFO L93 Difference]: Finished difference Result 5825 states and 7252 transitions. [2018-11-10 03:27:01,908 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-11-10 03:27:01,909 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 413 [2018-11-10 03:27:01,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 03:27:01,920 INFO L225 Difference]: With dead ends: 5825 [2018-11-10 03:27:01,920 INFO L226 Difference]: Without dead ends: 5612 [2018-11-10 03:27:01,921 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 412 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=117, Invalid=3189, Unknown=0, NotChecked=0, Total=3306 [2018-11-10 03:27:01,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5612 states. [2018-11-10 03:27:04,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5612 to 5563. [2018-11-10 03:27:04,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5563 states. [2018-11-10 03:27:04,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5563 states to 5563 states and 5663 transitions. [2018-11-10 03:27:04,861 INFO L78 Accepts]: Start accepts. Automaton has 5563 states and 5663 transitions. Word has length 413 [2018-11-10 03:27:04,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 03:27:04,862 INFO L481 AbstractCegarLoop]: Abstraction has 5563 states and 5663 transitions. [2018-11-10 03:27:04,862 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-11-10 03:27:04,862 INFO L276 IsEmpty]: Start isEmpty. Operand 5563 states and 5663 transitions. [2018-11-10 03:27:04,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 418 [2018-11-10 03:27:04,863 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 03:27:04,863 INFO L375 BasicCegarLoop]: trace histogram [102, 102, 101, 52, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 03:27:04,864 INFO L424 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 03:27:04,864 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 03:27:04,864 INFO L82 PathProgramCache]: Analyzing trace with hash 1583456842, now seen corresponding path program 52 times [2018-11-10 03:27:04,864 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 03:27:04,864 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 03:27:04,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:27:04,865 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 03:27:04,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:27:04,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:27:05,819 INFO L134 CoverageAnalysis]: Checked inductivity of 20604 backedges. 10504 proven. 9901 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2018-11-10 03:27:05,819 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 03:27:05,819 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1b3549e1-c80d-4ae0-9afa-bbf10ee374b7/bin-2019/uautomizer/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 03:27:05,825 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-10 03:27:05,876 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-10 03:27:05,876 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 03:27:05,881 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 03:27:05,976 INFO L134 CoverageAnalysis]: Checked inductivity of 20604 backedges. 10504 proven. 9901 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2018-11-10 03:27:05,993 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 03:27:05,993 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-11-10 03:27:05,994 INFO L460 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-11-10 03:27:05,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-11-10 03:27:05,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-11-10 03:27:05,995 INFO L87 Difference]: Start difference. First operand 5563 states and 5663 transitions. Second operand 54 states. [2018-11-10 03:27:09,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 03:27:09,190 INFO L93 Difference]: Finished difference Result 11127 states and 11328 transitions. [2018-11-10 03:27:09,190 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-11-10 03:27:09,190 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 417 [2018-11-10 03:27:09,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 03:27:09,197 INFO L225 Difference]: With dead ends: 11127 [2018-11-10 03:27:09,198 INFO L226 Difference]: Without dead ends: 5567 [2018-11-10 03:27:09,201 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 520 GetRequests, 468 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-11-10 03:27:09,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5567 states. [2018-11-10 03:27:12,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5567 to 5567. [2018-11-10 03:27:12,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5567 states. [2018-11-10 03:27:12,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5567 states to 5567 states and 5667 transitions. [2018-11-10 03:27:12,086 INFO L78 Accepts]: Start accepts. Automaton has 5567 states and 5667 transitions. Word has length 417 [2018-11-10 03:27:12,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 03:27:12,087 INFO L481 AbstractCegarLoop]: Abstraction has 5567 states and 5667 transitions. [2018-11-10 03:27:12,087 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-11-10 03:27:12,087 INFO L276 IsEmpty]: Start isEmpty. Operand 5567 states and 5667 transitions. [2018-11-10 03:27:12,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 422 [2018-11-10 03:27:12,088 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 03:27:12,089 INFO L375 BasicCegarLoop]: trace histogram [103, 103, 102, 52, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 03:27:12,089 INFO L424 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 03:27:12,089 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 03:27:12,089 INFO L82 PathProgramCache]: Analyzing trace with hash -273634184, now seen corresponding path program 53 times [2018-11-10 03:27:12,089 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 03:27:12,089 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 03:27:12,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:27:12,090 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 03:27:12,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:27:12,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:27:12,821 INFO L134 CoverageAnalysis]: Checked inductivity of 21012 backedges. 15656 proven. 0 refuted. 0 times theorem prover too weak. 5356 trivial. 0 not checked. [2018-11-10 03:27:12,821 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 03:27:12,821 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2018-11-10 03:27:12,821 INFO L460 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-11-10 03:27:12,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-11-10 03:27:12,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-11-10 03:27:12,822 INFO L87 Difference]: Start difference. First operand 5567 states and 5667 transitions. Second operand 53 states. [2018-11-10 03:27:12,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 03:27:12,933 INFO L93 Difference]: Finished difference Result 5567 states and 5667 transitions. [2018-11-10 03:27:12,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-11-10 03:27:12,933 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 421 [2018-11-10 03:27:12,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 03:27:12,934 INFO L225 Difference]: With dead ends: 5567 [2018-11-10 03:27:12,934 INFO L226 Difference]: Without dead ends: 0 [2018-11-10 03:27:12,940 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-11-10 03:27:12,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-10 03:27:12,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-10 03:27:12,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-10 03:27:12,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-10 03:27:12,940 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 421 [2018-11-10 03:27:12,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 03:27:12,941 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-10 03:27:12,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-11-10 03:27:12,941 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-10 03:27:12,941 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-10 03:27:12,945 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-10 03:27:18,334 WARN L179 SmtUtils]: Spent 5.38 s on a formula simplification. DAG size of input: 1852 DAG size of output: 1441 [2018-11-10 03:27:32,959 WARN L179 SmtUtils]: Spent 14.60 s on a formula simplification. DAG size of input: 1420 DAG size of output: 509 [2018-11-10 03:27:32,966 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-10 03:27:32,966 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-10 03:27:32,966 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-10 03:27:32,966 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-10 03:27:32,966 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-10 03:27:32,966 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-10 03:27:32,966 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 10 25) no Hoare annotation was computed. [2018-11-10 03:27:32,966 INFO L425 ceAbstractionStarter]: For program point L23(line 23) no Hoare annotation was computed. [2018-11-10 03:27:32,966 INFO L425 ceAbstractionStarter]: For program point L15(lines 15 19) no Hoare annotation was computed. [2018-11-10 03:27:32,966 INFO L425 ceAbstractionStarter]: For program point L15-2(lines 14 22) no Hoare annotation was computed. [2018-11-10 03:27:32,966 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 10 25) no Hoare annotation was computed. [2018-11-10 03:27:32,966 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 10 25) the Hoare annotation is: true [2018-11-10 03:27:32,967 INFO L425 ceAbstractionStarter]: For program point L14-1(lines 14 22) no Hoare annotation was computed. [2018-11-10 03:27:32,968 INFO L421 ceAbstractionStarter]: At program point L14-3(lines 14 22) the Hoare annotation is: (let ((.cse25 (<= main_~y~0 14)) (.cse24 (<= 14 main_~y~0)) (.cse3 (<= main_~y~0 7)) (.cse2 (<= 7 main_~y~0)) (.cse58 (<= 8 main_~y~0)) (.cse59 (<= main_~y~0 8)) (.cse43 (<= 39 main_~y~0)) (.cse42 (<= main_~y~0 39)) (.cse30 (<= main_~y~0 24)) (.cse31 (<= 24 main_~y~0)) (.cse53 (<= 47 main_~y~0)) (.cse52 (<= main_~y~0 47)) (.cse33 (<= main_~y~0 38)) (.cse32 (<= 38 main_~y~0)) (.cse55 (<= main_~y~0 23)) (.cse54 (<= 23 main_~y~0)) (.cse26 (<= main_~y~0 4)) (.cse27 (<= 4 main_~y~0)) (.cse62 (<= 0 main_~y~0)) (.cse63 (<= main_~y~0 0)) (.cse20 (<= 49 main_~y~0)) (.cse21 (<= main_~y~0 49)) (.cse44 (<= main_~y~0 13)) (.cse45 (<= 13 main_~y~0)) (.cse76 (<= main_~y~0 6)) (.cse77 (<= 6 main_~y~0)) (.cse14 (<= main_~y~0 45)) (.cse15 (<= 45 main_~y~0)) (.cse72 (<= main_~y~0 35)) (.cse73 (<= 35 main_~y~0)) (.cse70 (<= 22 main_~y~0)) (.cse71 (<= main_~y~0 22)) (.cse61 (<= main_~y~0 36)) (.cse60 (<= 36 main_~y~0)) (.cse6 (<= 48 main_~y~0)) (.cse7 (<= main_~y~0 48)) (.cse38 (<= main_~y~0 21)) (.cse39 (<= 21 main_~y~0)) (.cse49 (<= main_~y~0 9)) (.cse48 (<= 9 main_~y~0)) (.cse40 (<= 20 main_~y~0)) (.cse41 (<= main_~y~0 20)) (.cse57 (<= 5 main_~y~0)) (.cse56 (<= main_~y~0 5)) (.cse10 (<= main_~y~0 17)) (.cse11 (<= 17 main_~y~0)) (.cse87 (<= main_~y~0 26)) (.cse86 (<= 26 main_~y~0)) (.cse29 (<= 40 main_~y~0)) (.cse28 (<= main_~y~0 40)) (.cse18 (<= main_~y~0 10)) (.cse19 (<= 10 main_~y~0)) (.cse17 (<= main_~y~0 12)) (.cse16 (<= 12 main_~y~0)) (.cse88 (<= main_~y~0 29)) (.cse89 (<= 29 main_~y~0)) (.cse9 (<= main_~y~0 30)) (.cse8 (<= 30 main_~y~0)) (.cse90 (<= main_~y~0 2)) (.cse91 (<= 2 main_~y~0)) (.cse0 (<= 37 main_~y~0)) (.cse1 (<= main_~y~0 37)) (.cse80 (<= 31 main_~y~0)) (.cse81 (<= main_~y~0 31)) (.cse93 (<= 34 main_~y~0)) (.cse92 (<= main_~y~0 34)) (.cse94 (<= 19 main_~y~0)) (.cse95 (<= main_~y~0 19)) (.cse4 (<= 1 main_~y~0)) (.cse5 (<= main_~y~0 1)) (.cse96 (<= 32 main_~y~0)) (.cse97 (<= main_~y~0 32)) (.cse68 (<= 46 main_~y~0)) (.cse69 (<= main_~y~0 46)) (.cse84 (<= 18 main_~y~0)) (.cse85 (<= main_~y~0 18)) (.cse36 (<= main_~y~0 16)) (.cse37 (<= 16 main_~y~0)) (.cse23 (<= main_~y~0 3)) (.cse22 (<= 3 main_~y~0)) (.cse78 (<= 27 main_~y~0)) (.cse79 (<= main_~y~0 27)) (.cse34 (<= 44 main_~y~0)) (.cse35 (<= main_~y~0 44)) (.cse50 (<= 43 main_~y~0)) (.cse51 (<= main_~y~0 43)) (.cse99 (<= 25 main_~y~0)) (.cse98 (<= main_~y~0 25)) (.cse75 (<= main_~y~0 11)) (.cse74 (<= 11 main_~y~0)) (.cse64 (<= main_~y~0 42)) (.cse65 (<= 42 main_~y~0)) (.cse67 (<= main_~y~0 41)) (.cse66 (<= 41 main_~y~0)) (.cse13 (<= main_~y~0 33)) (.cse12 (<= 33 main_~y~0)) (.cse82 (<= main_~y~0 28)) (.cse83 (<= 28 main_~y~0)) (.cse46 (<= 15 main_~y~0)) (.cse47 (<= main_~y~0 15))) (or (and .cse0 (<= main_~x~0 37) (<= 37 main_~x~0) .cse1) (and .cse2 (<= 93 main_~x~0) .cse3 (<= main_~x~0 93)) (and (<= main_~y~0 50) (<= 50 main_~x~0) (<= main_~x~0 50) (<= 50 main_~y~0)) (and (<= main_~x~0 99) .cse4 .cse5 (<= 99 main_~x~0)) (and .cse6 .cse7 (<= main_~x~0 52) (<= 52 main_~x~0)) (and .cse8 (<= main_~x~0 70) .cse9 (<= 70 main_~x~0)) (and .cse10 (<= 83 main_~x~0) (<= main_~x~0 83) .cse11) (and .cse12 .cse13 (<= 67 main_~x~0) (<= main_~x~0 67)) (and (<= 45 main_~x~0) .cse14 .cse15 (<= main_~x~0 45)) (and (<= main_~x~0 88) (<= 88 main_~x~0) .cse16 .cse17) (and .cse18 .cse19 (<= main_~x~0 10) (<= 10 main_~x~0)) (and .cse20 (<= 49 main_~x~0) (<= main_~x~0 49) .cse21) (and .cse22 (<= 97 main_~x~0) .cse23 (<= main_~x~0 97)) (and .cse24 (<= main_~x~0 86) .cse25 (<= 86 main_~x~0)) (and .cse26 .cse27 (<= 4 main_~x~0) (<= main_~x~0 4)) (and (<= main_~x~0 40) .cse28 .cse29 (<= 40 main_~x~0)) (and .cse30 .cse31 (<= 76 main_~x~0) (<= main_~x~0 76)) (and .cse32 (<= main_~x~0 38) .cse33 (<= 38 main_~x~0)) (and (<= 44 main_~x~0) (<= main_~x~0 44) .cse34 .cse35) (and (<= main_~x~0 14) .cse25 (<= 14 main_~x~0) .cse24) (and .cse36 (<= 84 main_~x~0) .cse37 (<= main_~x~0 84)) (and .cse38 .cse39 (<= 21 main_~x~0) (<= main_~x~0 21)) (and .cse3 (<= main_~x~0 7) .cse2 (<= 7 main_~x~0)) (and (<= 20 main_~x~0) .cse40 .cse41 (<= main_~x~0 20)) (and (<= main_~x~0 39) (<= 39 main_~x~0) .cse42 .cse43) (and .cse44 (<= main_~x~0 87) (<= 87 main_~x~0) .cse45) (and (<= 15 main_~x~0) .cse46 .cse47 (<= main_~x~0 15)) (and (<= main_~x~0 91) (<= 91 main_~x~0) .cse48 .cse49) (and (<= 57 main_~x~0) .cse50 (<= main_~x~0 57) .cse51) (and .cse52 (<= 53 main_~x~0) .cse53 (<= main_~x~0 53)) (and .cse54 (<= main_~x~0 23) .cse55 (<= 23 main_~x~0)) (and (<= main_~x~0 95) .cse56 .cse57 (<= 95 main_~x~0)) (and (<= 8 main_~x~0) (<= main_~x~0 8) .cse58 .cse59) (and .cse60 .cse61 (<= main_~x~0 36) (<= 36 main_~x~0)) (and (<= main_~x~0 92) .cse58 .cse59 (<= 92 main_~x~0)) (and (<= main_~x~0 100) .cse62 (<= 100 main_~x~0) .cse63) (and .cse43 (<= 61 main_~x~0) .cse42 (<= main_~x~0 61)) (and (<= main_~x~0 24) .cse30 .cse31 (<= 24 main_~x~0)) (and (<= 58 main_~x~0) .cse64 (<= main_~x~0 58) .cse65) (and .cse53 .cse52 (<= main_~x~0 47) (<= 47 main_~x~0)) (and (<= 62 main_~x~0) (<= main_~x~0 62) .cse33 .cse32) (and .cse66 .cse67 (<= 59 main_~x~0) (<= main_~x~0 59)) (and .cse55 (<= 77 main_~x~0) (<= main_~x~0 77) .cse54) (and .cse26 (<= main_~x~0 96) .cse27 (<= 96 main_~x~0)) (and .cse68 (<= main_~x~0 46) (<= 46 main_~x~0) .cse69) (and (<= main_~x~0 78) .cse70 .cse71 (<= 78 main_~x~0)) (and (<= 35 main_~x~0) .cse72 .cse73 (<= main_~x~0 35)) (and .cse62 (<= main_~x~0 0) (<= 0 main_~x~0) .cse63) (and .cse74 .cse75 (<= 11 main_~x~0) (<= main_~x~0 11)) (and .cse76 (<= main_~x~0 6) .cse77 (<= 6 main_~x~0)) (and (<= main_~x~0 51) (<= 51 main_~x~0) .cse20 .cse21) (and (<= main_~x~0 73) (<= 73 main_~x~0) .cse78 .cse79) (and .cse44 (<= main_~x~0 13) (<= 13 main_~x~0) .cse45) (and .cse80 (<= main_~x~0 69) (<= 69 main_~x~0) .cse81) (and (<= 94 main_~x~0) .cse76 .cse77 (<= main_~x~0 94)) (and .cse14 .cse15 (<= main_~x~0 55) (<= 55 main_~x~0)) (and .cse72 (<= 65 main_~x~0) .cse73 (<= main_~x~0 65)) (and .cse70 (<= main_~x~0 22) .cse71 (<= 22 main_~x~0)) (and (<= main_~x~0 64) .cse61 (<= 64 main_~x~0) .cse60) (and .cse6 (<= 48 main_~x~0) (<= main_~x~0 48) .cse7) (and .cse38 .cse39 (<= main_~x~0 79) (<= 79 main_~x~0)) (and .cse82 (<= main_~x~0 28) (<= 28 main_~x~0) .cse83) (and (<= 9 main_~x~0) (<= main_~x~0 9) .cse49 .cse48) (and .cse84 .cse85 (<= 82 main_~x~0) (<= main_~x~0 82)) (and .cse40 (<= 80 main_~x~0) (<= main_~x~0 80) .cse41) (and .cse57 (<= 5 main_~x~0) .cse56 (<= main_~x~0 5)) (and (<= main_~x~0 26) .cse86 .cse87 (<= 26 main_~x~0)) (and (<= main_~x~0 17) .cse10 .cse11 (<= 17 main_~x~0)) (and (<= 74 main_~x~0) (<= main_~x~0 74) .cse87 .cse86) (and .cse29 .cse28 (<= main_~x~0 60) (<= 60 main_~x~0)) (and .cse18 .cse19 (<= 90 main_~x~0) (<= main_~x~0 90)) (and (<= main_~x~0 12) (<= 12 main_~x~0) .cse17 .cse16) (and .cse88 (<= 71 main_~x~0) .cse89 (<= main_~x~0 71)) (and (<= 2 main_~x~0) .cse90 (<= main_~x~0 2) .cse91) (and .cse88 (<= main_~x~0 29) (<= 29 main_~x~0) .cse89) (and (<= 30 main_~x~0) (<= main_~x~0 30) .cse9 .cse8) (and .cse90 (<= main_~x~0 98) .cse91 (<= 98 main_~x~0)) (and .cse92 (<= 66 main_~x~0) (<= main_~x~0 66) .cse93) (and .cse94 .cse95 (<= main_~x~0 19) (<= 19 main_~x~0)) (and (<= 63 main_~x~0) (<= main_~x~0 63) .cse0 .cse1) (and .cse80 (<= 31 main_~x~0) (<= main_~x~0 31) .cse81) (and .cse96 (<= main_~x~0 32) (<= 32 main_~x~0) .cse97) (and (<= 34 main_~x~0) (<= main_~x~0 34) .cse93 .cse92) (and (<= main_~x~0 75) (<= 75 main_~x~0) .cse98 .cse99) (and (<= main_~x~0 81) (<= 81 main_~x~0) .cse94 .cse95) (and .cse4 (<= main_~x~0 1) (<= 1 main_~x~0) .cse5) (and (<= 68 main_~x~0) .cse96 (<= main_~x~0 68) .cse97) (and (<= 54 main_~x~0) .cse68 (<= main_~x~0 54) .cse69) (and .cse84 (<= main_~x~0 18) .cse85 (<= 18 main_~x~0)) (and (<= main_~x~0 16) (<= 16 main_~x~0) .cse36 .cse37) (and (<= main_~x~0 3) .cse23 (<= 3 main_~x~0) .cse22) (and (<= main_~x~0 27) .cse78 .cse79 (<= 27 main_~x~0)) (and .cse34 (<= main_~x~0 56) .cse35 (<= 56 main_~x~0)) (and (<= 43 main_~x~0) .cse50 .cse51 (<= main_~x~0 43)) (and .cse99 (<= 25 main_~x~0) .cse98 (<= main_~x~0 25)) (and .cse75 .cse74 (<= 89 main_~x~0) (<= main_~x~0 89)) (and (<= main_~x~0 42) .cse64 .cse65 (<= 42 main_~x~0)) (and .cse67 .cse66 (<= 41 main_~x~0) (<= main_~x~0 41)) (and (<= main_~x~0 33) .cse13 .cse12 (<= 33 main_~x~0)) (and .cse82 (<= 72 main_~x~0) .cse83 (<= main_~x~0 72)) (and .cse46 .cse47 (<= main_~x~0 85) (<= 85 main_~x~0)))) [2018-11-10 03:27:32,968 INFO L421 ceAbstractionStarter]: At program point L14-4(lines 14 22) the Hoare annotation is: (and (<= main_~x~0 100) (<= 100 main_~x~0)) [2018-11-10 03:27:32,968 INFO L428 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2018-11-10 03:27:32,968 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2018-11-10 03:27:32,969 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2018-11-10 03:27:32,969 INFO L425 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-11-10 03:27:32,969 INFO L425 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2018-11-10 03:27:32,969 INFO L425 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2018-11-10 03:27:32,998 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.11 03:27:32 BoogieIcfgContainer [2018-11-10 03:27:32,998 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-10 03:27:32,999 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-10 03:27:32,999 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-10 03:27:32,999 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-10 03:27:32,999 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 03:26:24" (3/4) ... [2018-11-10 03:27:33,006 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-10 03:27:33,011 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-10 03:27:33,011 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-10 03:27:33,011 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2018-11-10 03:27:33,014 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2018-11-10 03:27:33,014 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2018-11-10 03:27:33,014 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-10 03:27:33,043 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_1b3549e1-c80d-4ae0-9afa-bbf10ee374b7/bin-2019/uautomizer/witness.graphml [2018-11-10 03:27:33,044 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-10 03:27:33,044 INFO L168 Benchmark]: Toolchain (without parser) took 69234.88 ms. Allocated memory was 1.0 GB in the beginning and 2.4 GB in the end (delta: 1.4 GB). Free memory was 959.1 MB in the beginning and 1.0 GB in the end (delta: -62.6 MB). Peak memory consumption was 1.3 GB. Max. memory is 11.5 GB. [2018-11-10 03:27:33,045 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 03:27:33,045 INFO L168 Benchmark]: CACSL2BoogieTranslator took 127.33 ms. Allocated memory is still 1.0 GB. Free memory was 959.1 MB in the beginning and 947.2 MB in the end (delta: 11.9 MB). Peak memory consumption was 11.9 MB. Max. memory is 11.5 GB. [2018-11-10 03:27:33,045 INFO L168 Benchmark]: Boogie Preprocessor took 21.54 ms. Allocated memory is still 1.0 GB. Free memory is still 947.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 03:27:33,045 INFO L168 Benchmark]: RCFGBuilder took 186.15 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 134.7 MB). Free memory was 947.2 MB in the beginning and 1.1 GB in the end (delta: -169.2 MB). Peak memory consumption was 22.4 MB. Max. memory is 11.5 GB. [2018-11-10 03:27:33,046 INFO L168 Benchmark]: TraceAbstraction took 68851.71 ms. Allocated memory was 1.2 GB in the beginning and 2.4 GB in the end (delta: 1.2 GB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 91.1 MB). Peak memory consumption was 1.5 GB. Max. memory is 11.5 GB. [2018-11-10 03:27:33,046 INFO L168 Benchmark]: Witness Printer took 45.06 ms. Allocated memory is still 2.4 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 24 B). Peak memory consumption was 24 B. Max. memory is 11.5 GB. [2018-11-10 03:27:33,047 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 127.33 ms. Allocated memory is still 1.0 GB. Free memory was 959.1 MB in the beginning and 947.2 MB in the end (delta: 11.9 MB). Peak memory consumption was 11.9 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 21.54 ms. Allocated memory is still 1.0 GB. Free memory is still 947.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 186.15 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 134.7 MB). Free memory was 947.2 MB in the beginning and 1.1 GB in the end (delta: -169.2 MB). Peak memory consumption was 22.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 68851.71 ms. Allocated memory was 1.2 GB in the beginning and 2.4 GB in the end (delta: 1.2 GB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 91.1 MB). Peak memory consumption was 1.5 GB. Max. memory is 11.5 GB. * Witness Printer took 45.06 ms. Allocated memory is still 2.4 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 24 B). Peak memory consumption was 24 B. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: 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: 14]: Loop Invariant Derived loop invariant: ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((37 <= y && x <= 37) && 37 <= x) && y <= 37) || (((7 <= y && 93 <= x) && y <= 7) && x <= 93)) || (((y <= 50 && 50 <= x) && x <= 50) && 50 <= y)) || (((x <= 99 && 1 <= y) && y <= 1) && 99 <= x)) || (((48 <= y && y <= 48) && x <= 52) && 52 <= x)) || (((30 <= y && x <= 70) && y <= 30) && 70 <= x)) || (((y <= 17 && 83 <= x) && x <= 83) && 17 <= y)) || (((33 <= y && y <= 33) && 67 <= x) && x <= 67)) || (((45 <= x && y <= 45) && 45 <= y) && x <= 45)) || (((x <= 88 && 88 <= x) && 12 <= y) && y <= 12)) || (((y <= 10 && 10 <= y) && x <= 10) && 10 <= x)) || (((49 <= y && 49 <= x) && x <= 49) && y <= 49)) || (((3 <= y && 97 <= x) && y <= 3) && x <= 97)) || (((14 <= y && x <= 86) && y <= 14) && 86 <= x)) || (((y <= 4 && 4 <= y) && 4 <= x) && x <= 4)) || (((x <= 40 && y <= 40) && 40 <= y) && 40 <= x)) || (((y <= 24 && 24 <= y) && 76 <= x) && x <= 76)) || (((38 <= y && x <= 38) && y <= 38) && 38 <= x)) || (((44 <= x && x <= 44) && 44 <= y) && y <= 44)) || (((x <= 14 && y <= 14) && 14 <= x) && 14 <= y)) || (((y <= 16 && 84 <= x) && 16 <= y) && x <= 84)) || (((y <= 21 && 21 <= y) && 21 <= x) && x <= 21)) || (((y <= 7 && x <= 7) && 7 <= y) && 7 <= x)) || (((20 <= x && 20 <= y) && y <= 20) && x <= 20)) || (((x <= 39 && 39 <= x) && y <= 39) && 39 <= y)) || (((y <= 13 && x <= 87) && 87 <= x) && 13 <= y)) || (((15 <= x && 15 <= y) && y <= 15) && x <= 15)) || (((x <= 91 && 91 <= x) && 9 <= y) && y <= 9)) || (((57 <= x && 43 <= y) && x <= 57) && y <= 43)) || (((y <= 47 && 53 <= x) && 47 <= y) && x <= 53)) || (((23 <= y && x <= 23) && y <= 23) && 23 <= x)) || (((x <= 95 && y <= 5) && 5 <= y) && 95 <= x)) || (((8 <= x && x <= 8) && 8 <= y) && y <= 8)) || (((36 <= y && y <= 36) && x <= 36) && 36 <= x)) || (((x <= 92 && 8 <= y) && y <= 8) && 92 <= x)) || (((x <= 100 && 0 <= y) && 100 <= x) && y <= 0)) || (((39 <= y && 61 <= x) && y <= 39) && x <= 61)) || (((x <= 24 && y <= 24) && 24 <= y) && 24 <= x)) || (((58 <= x && y <= 42) && x <= 58) && 42 <= y)) || (((47 <= y && y <= 47) && x <= 47) && 47 <= x)) || (((62 <= x && x <= 62) && y <= 38) && 38 <= y)) || (((41 <= y && y <= 41) && 59 <= x) && x <= 59)) || (((y <= 23 && 77 <= x) && x <= 77) && 23 <= y)) || (((y <= 4 && x <= 96) && 4 <= y) && 96 <= x)) || (((46 <= y && x <= 46) && 46 <= x) && y <= 46)) || (((x <= 78 && 22 <= y) && y <= 22) && 78 <= x)) || (((35 <= x && y <= 35) && 35 <= y) && x <= 35)) || (((0 <= y && x <= 0) && 0 <= x) && y <= 0)) || (((11 <= y && y <= 11) && 11 <= x) && x <= 11)) || (((y <= 6 && x <= 6) && 6 <= y) && 6 <= x)) || (((x <= 51 && 51 <= x) && 49 <= y) && y <= 49)) || (((x <= 73 && 73 <= x) && 27 <= y) && y <= 27)) || (((y <= 13 && x <= 13) && 13 <= x) && 13 <= y)) || (((31 <= y && x <= 69) && 69 <= x) && y <= 31)) || (((94 <= x && y <= 6) && 6 <= y) && x <= 94)) || (((y <= 45 && 45 <= y) && x <= 55) && 55 <= x)) || (((y <= 35 && 65 <= x) && 35 <= y) && x <= 65)) || (((22 <= y && x <= 22) && y <= 22) && 22 <= x)) || (((x <= 64 && y <= 36) && 64 <= x) && 36 <= y)) || (((48 <= y && 48 <= x) && x <= 48) && y <= 48)) || (((y <= 21 && 21 <= y) && x <= 79) && 79 <= x)) || (((y <= 28 && x <= 28) && 28 <= x) && 28 <= y)) || (((9 <= x && x <= 9) && y <= 9) && 9 <= y)) || (((18 <= y && y <= 18) && 82 <= x) && x <= 82)) || (((20 <= y && 80 <= x) && x <= 80) && y <= 20)) || (((5 <= y && 5 <= x) && y <= 5) && x <= 5)) || (((x <= 26 && 26 <= y) && y <= 26) && 26 <= x)) || (((x <= 17 && y <= 17) && 17 <= y) && 17 <= x)) || (((74 <= x && x <= 74) && y <= 26) && 26 <= y)) || (((40 <= y && y <= 40) && x <= 60) && 60 <= x)) || (((y <= 10 && 10 <= y) && 90 <= x) && x <= 90)) || (((x <= 12 && 12 <= x) && y <= 12) && 12 <= y)) || (((y <= 29 && 71 <= x) && 29 <= y) && x <= 71)) || (((2 <= x && y <= 2) && x <= 2) && 2 <= y)) || (((y <= 29 && x <= 29) && 29 <= x) && 29 <= y)) || (((30 <= x && x <= 30) && y <= 30) && 30 <= y)) || (((y <= 2 && x <= 98) && 2 <= y) && 98 <= x)) || (((y <= 34 && 66 <= x) && x <= 66) && 34 <= y)) || (((19 <= y && y <= 19) && x <= 19) && 19 <= x)) || (((63 <= x && x <= 63) && 37 <= y) && y <= 37)) || (((31 <= y && 31 <= x) && x <= 31) && y <= 31)) || (((32 <= y && x <= 32) && 32 <= x) && y <= 32)) || (((34 <= x && x <= 34) && 34 <= y) && y <= 34)) || (((x <= 75 && 75 <= x) && y <= 25) && 25 <= y)) || (((x <= 81 && 81 <= x) && 19 <= y) && y <= 19)) || (((1 <= y && x <= 1) && 1 <= x) && y <= 1)) || (((68 <= x && 32 <= y) && x <= 68) && y <= 32)) || (((54 <= x && 46 <= y) && x <= 54) && y <= 46)) || (((18 <= y && x <= 18) && y <= 18) && 18 <= x)) || (((x <= 16 && 16 <= x) && y <= 16) && 16 <= y)) || (((x <= 3 && y <= 3) && 3 <= x) && 3 <= y)) || (((x <= 27 && 27 <= y) && y <= 27) && 27 <= x)) || (((44 <= y && x <= 56) && y <= 44) && 56 <= x)) || (((43 <= x && 43 <= y) && y <= 43) && x <= 43)) || (((25 <= y && 25 <= x) && y <= 25) && x <= 25)) || (((y <= 11 && 11 <= y) && 89 <= x) && x <= 89)) || (((x <= 42 && y <= 42) && 42 <= y) && 42 <= x)) || (((y <= 41 && 41 <= y) && 41 <= x) && x <= 41)) || (((x <= 33 && y <= 33) && 33 <= y) && 33 <= x)) || (((y <= 28 && 72 <= x) && 28 <= y) && x <= 72)) || (((15 <= y && y <= 15) && x <= 85) && 85 <= x) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 21 locations, 1 error locations. SAFE Result, 68.7s OverallTime, 56 OverallIterations, 103 TraceHistogramMax, 15.6s AutomataDifference, 0.0s DeadEndRemovalTime, 20.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1384 SDtfs, 1336 SDslu, 26295 SDs, 0 SdLazy, 15291 SolverSat, 1605 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12621 GetRequests, 10724 SyntacticMatches, 2 SemanticMatches, 1895 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16067 ImplicationChecksByTransitivity, 19.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=5567occurred in iteration=55, 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: 7.1s AutomataMinimizationTime, 56 MinimizatonAttempts, 4315 StatesRemovedByMinimization, 52 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 63 PreInvPairs, 165 NumberOfFragments, 1326 HoareAnnotationTreeSize, 63 FomulaSimplifications, 13241479 FormulaSimplificationTreeSizeReduction, 5.3s HoareSimplificationTime, 7 FomulaSimplificationsInter, 6324089 FormulaSimplificationTreeSizeReductionInter, 14.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.4s SsaConstructionTime, 2.4s SatisfiabilityAnalysisTime, 20.1s InterpolantComputationTime, 21873 NumberOfCodeBlocks, 21689 NumberOfCodeBlocksAsserted, 1282 NumberOfCheckSat, 21765 ConstructedInterpolants, 0 QuantifiedInterpolants, 13648321 SizeOfPredicates, 53 NumberOfNonLiveVariables, 21204 ConjunctsInSsa, 1727 ConjunctsInUnsatCore, 108 InterpolantComputations, 4 PerfectInterpolantSequences, 480174/690756 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...