./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/recursive-simple/sum_25x0_true-unreach-call_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5842f4b8 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_6013e879-ac89-4e0d-9842-69f1886e5c60/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_6013e879-ac89-4e0d-9842-69f1886e5c60/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_6013e879-ac89-4e0d-9842-69f1886e5c60/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_6013e879-ac89-4e0d-9842-69f1886e5c60/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/sum_25x0_true-unreach-call_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_6013e879-ac89-4e0d-9842-69f1886e5c60/bin-2019/uautomizer/config/svcomp-Reach-32bit-PetriAutomizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_6013e879-ac89-4e0d-9842-69f1886e5c60/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 4039dcb878ce4fadab8efdd435e8ec3d803b5cc8 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-5842f4b [2018-11-18 10:14:07,647 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-18 10:14:07,648 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-18 10:14:07,657 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-18 10:14:07,658 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-18 10:14:07,659 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-18 10:14:07,660 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-18 10:14:07,661 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-18 10:14:07,662 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-18 10:14:07,663 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-18 10:14:07,664 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-18 10:14:07,664 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-18 10:14:07,665 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-18 10:14:07,665 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-18 10:14:07,667 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-18 10:14:07,668 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-18 10:14:07,668 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-18 10:14:07,670 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-18 10:14:07,671 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-18 10:14:07,672 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-18 10:14:07,673 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-18 10:14:07,674 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-18 10:14:07,676 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-18 10:14:07,676 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-18 10:14:07,677 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-18 10:14:07,677 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-18 10:14:07,679 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-18 10:14:07,679 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-18 10:14:07,680 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-18 10:14:07,681 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-18 10:14:07,681 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-18 10:14:07,681 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-18 10:14:07,681 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-18 10:14:07,682 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-18 10:14:07,682 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-18 10:14:07,683 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-18 10:14:07,683 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_6013e879-ac89-4e0d-9842-69f1886e5c60/bin-2019/uautomizer/config/svcomp-Reach-32bit-PetriAutomizer_Default.epf [2018-11-18 10:14:07,692 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-18 10:14:07,692 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-18 10:14:07,692 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-18 10:14:07,693 INFO L133 SettingsManager]: * Process only entry and re-entry procedures=false [2018-11-18 10:14:07,693 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-18 10:14:07,693 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-18 10:14:07,693 INFO L133 SettingsManager]: * Use SBE=true [2018-11-18 10:14:07,693 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-18 10:14:07,694 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-18 10:14:07,694 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-18 10:14:07,695 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-18 10:14:07,695 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-18 10:14:07,695 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-18 10:14:07,695 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-18 10:14:07,695 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-18 10:14:07,695 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-18 10:14:07,696 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-18 10:14:07,696 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-18 10:14:07,696 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-18 10:14:07,696 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-18 10:14:07,696 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-18 10:14:07,696 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-18 10:14:07,696 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-18 10:14:07,696 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 10:14:07,697 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-18 10:14:07,697 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-18 10:14:07,697 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-18 10:14:07,697 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-18 10:14:07,697 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-18 10:14:07,697 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-18 10:14:07,697 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_6013e879-ac89-4e0d-9842-69f1886e5c60/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 -> 4039dcb878ce4fadab8efdd435e8ec3d803b5cc8 [2018-11-18 10:14:07,721 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-18 10:14:07,730 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-18 10:14:07,733 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-18 10:14:07,734 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-18 10:14:07,735 INFO L276 PluginConnector]: CDTParser initialized [2018-11-18 10:14:07,735 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_6013e879-ac89-4e0d-9842-69f1886e5c60/bin-2019/uautomizer/../../sv-benchmarks/c/recursive-simple/sum_25x0_true-unreach-call_true-termination.c [2018-11-18 10:14:07,790 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_6013e879-ac89-4e0d-9842-69f1886e5c60/bin-2019/uautomizer/data/ed606cf79/f07c5246538f48a8bdbf7cef9eecfafb/FLAG7911cecf0 [2018-11-18 10:14:08,135 INFO L307 CDTParser]: Found 1 translation units. [2018-11-18 10:14:08,136 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_6013e879-ac89-4e0d-9842-69f1886e5c60/sv-benchmarks/c/recursive-simple/sum_25x0_true-unreach-call_true-termination.c [2018-11-18 10:14:08,140 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_6013e879-ac89-4e0d-9842-69f1886e5c60/bin-2019/uautomizer/data/ed606cf79/f07c5246538f48a8bdbf7cef9eecfafb/FLAG7911cecf0 [2018-11-18 10:14:08,152 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_6013e879-ac89-4e0d-9842-69f1886e5c60/bin-2019/uautomizer/data/ed606cf79/f07c5246538f48a8bdbf7cef9eecfafb [2018-11-18 10:14:08,154 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-18 10:14:08,155 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-18 10:14:08,156 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-18 10:14:08,156 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-18 10:14:08,159 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-18 10:14:08,160 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 10:14:08" (1/1) ... [2018-11-18 10:14:08,162 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6942d2ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:14:08, skipping insertion in model container [2018-11-18 10:14:08,162 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 10:14:08" (1/1) ... [2018-11-18 10:14:08,170 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-18 10:14:08,180 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-18 10:14:08,285 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 10:14:08,287 INFO L191 MainTranslator]: Completed pre-run [2018-11-18 10:14:08,296 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 10:14:08,305 INFO L195 MainTranslator]: Completed translation [2018-11-18 10:14:08,305 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:14:08 WrapperNode [2018-11-18 10:14:08,305 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-18 10:14:08,306 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-18 10:14:08,306 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-18 10:14:08,306 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-18 10:14:08,315 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:14:08" (1/1) ... [2018-11-18 10:14:08,316 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:14:08" (1/1) ... [2018-11-18 10:14:08,319 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:14:08" (1/1) ... [2018-11-18 10:14:08,320 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:14:08" (1/1) ... [2018-11-18 10:14:08,322 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:14:08" (1/1) ... [2018-11-18 10:14:08,323 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:14:08" (1/1) ... [2018-11-18 10:14:08,324 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:14:08" (1/1) ... [2018-11-18 10:14:08,325 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-18 10:14:08,325 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-18 10:14:08,325 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-18 10:14:08,325 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-18 10:14:08,326 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:14:08" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6013e879-ac89-4e0d-9842-69f1886e5c60/bin-2019/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 10:14:08,416 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-18 10:14:08,416 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-18 10:14:08,417 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2018-11-18 10:14:08,417 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-18 10:14:08,417 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-11-18 10:14:08,417 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2018-11-18 10:14:08,417 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-18 10:14:08,417 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-18 10:14:08,417 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-18 10:14:08,589 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-18 10:14:08,589 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 10:14:08 BoogieIcfgContainer [2018-11-18 10:14:08,590 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-18 10:14:08,590 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-18 10:14:08,590 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-18 10:14:08,593 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-18 10:14:08,593 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 10:14:08" (1/3) ... [2018-11-18 10:14:08,594 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@82ed485 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 10:14:08, skipping insertion in model container [2018-11-18 10:14:08,594 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:14:08" (2/3) ... [2018-11-18 10:14:08,595 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@82ed485 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 10:14:08, skipping insertion in model container [2018-11-18 10:14:08,595 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 10:14:08" (3/3) ... [2018-11-18 10:14:08,596 INFO L112 eAbstractionObserver]: Analyzing ICFG sum_25x0_true-unreach-call_true-termination.c [2018-11-18 10:14:08,605 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-18 10:14:08,612 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-18 10:14:08,626 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-18 10:14:08,652 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-18 10:14:08,652 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-18 10:14:08,653 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-18 10:14:08,653 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-18 10:14:08,653 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-18 10:14:08,653 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-18 10:14:08,653 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-18 10:14:08,653 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-18 10:14:08,653 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-18 10:14:08,671 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2018-11-18 10:14:08,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-18 10:14:08,684 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:14:08,685 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:14:08,687 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 10:14:08,692 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:14:08,692 INFO L82 PathProgramCache]: Analyzing trace with hash 2001781660, now seen corresponding path program 1 times [2018-11-18 10:14:08,694 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 10:14:08,694 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 10:14:08,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:14:08,737 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:14:08,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:14:08,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:14:08,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 10:14:08,885 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 10:14:08,886 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-18 10:14:08,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 10:14:08,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 10:14:08,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 10:14:08,898 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2018-11-18 10:14:09,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:14:09,047 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2018-11-18 10:14:09,047 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 10:14:09,048 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-11-18 10:14:09,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:14:09,055 INFO L225 Difference]: With dead ends: 30 [2018-11-18 10:14:09,055 INFO L226 Difference]: Without dead ends: 18 [2018-11-18 10:14:09,058 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-18 10:14:09,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-11-18 10:14:09,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-11-18 10:14:09,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-11-18 10:14:09,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2018-11-18 10:14:09,092 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2018-11-18 10:14:09,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:14:09,093 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2018-11-18 10:14:09,093 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 10:14:09,093 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2018-11-18 10:14:09,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-11-18 10:14:09,095 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:14:09,095 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:14:09,095 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 10:14:09,095 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:14:09,095 INFO L82 PathProgramCache]: Analyzing trace with hash -118151420, now seen corresponding path program 1 times [2018-11-18 10:14:09,096 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 10:14:09,096 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 10:14:09,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:14:09,097 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:14:09,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:14:09,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:14:09,179 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-18 10:14:09,180 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:14:09,180 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6013e879-ac89-4e0d-9842-69f1886e5c60/bin-2019/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-11-18 10:14:09,195 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 10:14:09,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:14:09,213 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 10:14:09,240 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-18 10:14:09,256 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 10:14:09,256 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-11-18 10:14:09,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-18 10:14:09,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-18 10:14:09,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-11-18 10:14:09,257 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2018-11-18 10:14:09,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:14:09,458 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-11-18 10:14:09,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-18 10:14:09,459 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2018-11-18 10:14:09,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:14:09,459 INFO L225 Difference]: With dead ends: 25 [2018-11-18 10:14:09,459 INFO L226 Difference]: Without dead ends: 21 [2018-11-18 10:14:09,460 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-11-18 10:14:09,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-11-18 10:14:09,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-11-18 10:14:09,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-11-18 10:14:09,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-11-18 10:14:09,463 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2018-11-18 10:14:09,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:14:09,464 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-11-18 10:14:09,464 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-18 10:14:09,464 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-11-18 10:14:09,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-11-18 10:14:09,465 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:14:09,465 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:14:09,465 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 10:14:09,465 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:14:09,465 INFO L82 PathProgramCache]: Analyzing trace with hash 764931548, now seen corresponding path program 2 times [2018-11-18 10:14:09,465 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 10:14:09,465 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 10:14:09,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:14:09,466 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:14:09,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:14:09,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:14:09,568 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-18 10:14:09,568 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:14:09,568 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6013e879-ac89-4e0d-9842-69f1886e5c60/bin-2019/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 10:14:09,582 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-18 10:14:09,594 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-18 10:14:09,594 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 10:14:09,596 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 10:14:09,611 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-18 10:14:09,626 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 10:14:09,626 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-11-18 10:14:09,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-18 10:14:09,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-18 10:14:09,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-11-18 10:14:09,627 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 7 states. [2018-11-18 10:14:09,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:14:09,687 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2018-11-18 10:14:09,687 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-18 10:14:09,687 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2018-11-18 10:14:09,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:14:09,688 INFO L225 Difference]: With dead ends: 28 [2018-11-18 10:14:09,688 INFO L226 Difference]: Without dead ends: 24 [2018-11-18 10:14:09,688 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-11-18 10:14:09,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-11-18 10:14:09,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-11-18 10:14:09,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-11-18 10:14:09,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2018-11-18 10:14:09,693 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2018-11-18 10:14:09,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:14:09,694 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2018-11-18 10:14:09,694 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-18 10:14:09,694 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2018-11-18 10:14:09,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-11-18 10:14:09,694 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:14:09,694 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:14:09,695 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 10:14:09,695 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:14:09,695 INFO L82 PathProgramCache]: Analyzing trace with hash 601942852, now seen corresponding path program 3 times [2018-11-18 10:14:09,695 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 10:14:09,695 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 10:14:09,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:14:09,696 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 10:14:09,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:14:09,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:14:09,832 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-18 10:14:09,833 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:14:09,833 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6013e879-ac89-4e0d-9842-69f1886e5c60/bin-2019/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 10:14:09,843 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 10:14:09,866 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-11-18 10:14:09,866 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 10:14:09,869 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 10:14:09,887 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-18 10:14:09,912 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 10:14:09,912 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-11-18 10:14:09,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-18 10:14:09,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-18 10:14:09,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-11-18 10:14:09,913 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 8 states. [2018-11-18 10:14:10,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:14:10,094 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2018-11-18 10:14:10,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-18 10:14:10,094 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2018-11-18 10:14:10,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:14:10,095 INFO L225 Difference]: With dead ends: 31 [2018-11-18 10:14:10,098 INFO L226 Difference]: Without dead ends: 27 [2018-11-18 10:14:10,099 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2018-11-18 10:14:10,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-11-18 10:14:10,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-11-18 10:14:10,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-11-18 10:14:10,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-11-18 10:14:10,103 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2018-11-18 10:14:10,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:14:10,103 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-11-18 10:14:10,103 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-18 10:14:10,104 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-11-18 10:14:10,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-11-18 10:14:10,104 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:14:10,104 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:14:10,105 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 10:14:10,105 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:14:10,105 INFO L82 PathProgramCache]: Analyzing trace with hash -183109604, now seen corresponding path program 4 times [2018-11-18 10:14:10,105 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 10:14:10,105 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 10:14:10,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:14:10,109 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 10:14:10,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:14:10,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:14:10,288 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-11-18 10:14:10,288 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:14:10,289 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6013e879-ac89-4e0d-9842-69f1886e5c60/bin-2019/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 10:14:10,295 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 10:14:10,309 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 10:14:10,310 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 10:14:10,312 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 10:14:10,324 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-11-18 10:14:10,350 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 10:14:10,350 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-11-18 10:14:10,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-18 10:14:10,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-18 10:14:10,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-11-18 10:14:10,351 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 9 states. [2018-11-18 10:14:10,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:14:10,428 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2018-11-18 10:14:10,428 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-18 10:14:10,428 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2018-11-18 10:14:10,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:14:10,429 INFO L225 Difference]: With dead ends: 34 [2018-11-18 10:14:10,429 INFO L226 Difference]: Without dead ends: 30 [2018-11-18 10:14:10,429 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2018-11-18 10:14:10,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-11-18 10:14:10,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-11-18 10:14:10,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-11-18 10:14:10,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2018-11-18 10:14:10,434 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2018-11-18 10:14:10,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:14:10,434 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2018-11-18 10:14:10,434 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-18 10:14:10,434 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2018-11-18 10:14:10,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-11-18 10:14:10,435 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:14:10,435 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:14:10,436 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 10:14:10,436 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:14:10,436 INFO L82 PathProgramCache]: Analyzing trace with hash -155447420, now seen corresponding path program 5 times [2018-11-18 10:14:10,436 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 10:14:10,436 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 10:14:10,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:14:10,437 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 10:14:10,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:14:10,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:14:10,560 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-11-18 10:14:10,560 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:14:10,560 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6013e879-ac89-4e0d-9842-69f1886e5c60/bin-2019/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 10:14:10,567 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-18 10:14:10,596 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-11-18 10:14:10,596 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 10:14:10,599 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 10:14:10,624 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-11-18 10:14:10,640 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 10:14:10,640 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-11-18 10:14:10,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-18 10:14:10,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-18 10:14:10,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-11-18 10:14:10,641 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 10 states. [2018-11-18 10:14:10,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:14:10,796 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2018-11-18 10:14:10,796 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-18 10:14:10,797 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2018-11-18 10:14:10,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:14:10,797 INFO L225 Difference]: With dead ends: 37 [2018-11-18 10:14:10,797 INFO L226 Difference]: Without dead ends: 33 [2018-11-18 10:14:10,798 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2018-11-18 10:14:10,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-11-18 10:14:10,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-11-18 10:14:10,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-11-18 10:14:10,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-11-18 10:14:10,801 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2018-11-18 10:14:10,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:14:10,802 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-11-18 10:14:10,802 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-18 10:14:10,802 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-11-18 10:14:10,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-11-18 10:14:10,803 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:14:10,803 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:14:10,803 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 10:14:10,803 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:14:10,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1716183644, now seen corresponding path program 6 times [2018-11-18 10:14:10,803 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 10:14:10,803 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 10:14:10,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:14:10,804 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 10:14:10,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:14:10,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:14:10,950 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-11-18 10:14:10,950 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:14:10,950 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6013e879-ac89-4e0d-9842-69f1886e5c60/bin-2019/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 10:14:10,961 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-18 10:14:10,986 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-11-18 10:14:10,986 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 10:14:10,988 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 10:14:11,004 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-11-18 10:14:11,020 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 10:14:11,020 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-11-18 10:14:11,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-18 10:14:11,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-18 10:14:11,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2018-11-18 10:14:11,021 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 11 states. [2018-11-18 10:14:11,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:14:11,121 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2018-11-18 10:14:11,121 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-18 10:14:11,121 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2018-11-18 10:14:11,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:14:11,122 INFO L225 Difference]: With dead ends: 40 [2018-11-18 10:14:11,122 INFO L226 Difference]: Without dead ends: 36 [2018-11-18 10:14:11,123 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2018-11-18 10:14:11,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-11-18 10:14:11,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-11-18 10:14:11,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-11-18 10:14:11,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2018-11-18 10:14:11,127 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2018-11-18 10:14:11,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:14:11,127 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2018-11-18 10:14:11,127 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-18 10:14:11,127 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2018-11-18 10:14:11,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-11-18 10:14:11,128 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:14:11,129 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:14:11,129 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 10:14:11,129 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:14:11,129 INFO L82 PathProgramCache]: Analyzing trace with hash -1079602236, now seen corresponding path program 7 times [2018-11-18 10:14:11,129 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 10:14:11,129 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 10:14:11,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:14:11,130 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 10:14:11,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:14:11,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:14:11,274 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-11-18 10:14:11,274 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:14:11,274 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6013e879-ac89-4e0d-9842-69f1886e5c60/bin-2019/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 10:14:11,280 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:14:11,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:14:11,298 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 10:14:11,313 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-11-18 10:14:11,328 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 10:14:11,329 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-11-18 10:14:11,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-18 10:14:11,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-18 10:14:11,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2018-11-18 10:14:11,329 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 12 states. [2018-11-18 10:14:11,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:14:11,548 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2018-11-18 10:14:11,548 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-18 10:14:11,549 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2018-11-18 10:14:11,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:14:11,549 INFO L225 Difference]: With dead ends: 43 [2018-11-18 10:14:11,549 INFO L226 Difference]: Without dead ends: 39 [2018-11-18 10:14:11,550 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2018-11-18 10:14:11,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-11-18 10:14:11,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-11-18 10:14:11,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-11-18 10:14:11,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2018-11-18 10:14:11,554 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2018-11-18 10:14:11,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:14:11,555 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2018-11-18 10:14:11,555 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-18 10:14:11,555 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2018-11-18 10:14:11,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-11-18 10:14:11,556 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:14:11,556 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:14:11,556 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 10:14:11,556 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:14:11,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1035381916, now seen corresponding path program 8 times [2018-11-18 10:14:11,557 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 10:14:11,557 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 10:14:11,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:14:11,557 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:14:11,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:14:11,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:14:11,698 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-11-18 10:14:11,698 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:14:11,698 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6013e879-ac89-4e0d-9842-69f1886e5c60/bin-2019/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 10:14:11,705 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-18 10:14:11,726 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-18 10:14:11,726 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 10:14:11,729 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 10:14:11,759 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-11-18 10:14:11,775 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 10:14:11,776 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-11-18 10:14:11,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-18 10:14:11,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-18 10:14:11,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2018-11-18 10:14:11,777 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 13 states. [2018-11-18 10:14:11,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:14:11,876 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2018-11-18 10:14:11,877 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-18 10:14:11,877 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2018-11-18 10:14:11,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:14:11,878 INFO L225 Difference]: With dead ends: 46 [2018-11-18 10:14:11,878 INFO L226 Difference]: Without dead ends: 42 [2018-11-18 10:14:11,878 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2018-11-18 10:14:11,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-11-18 10:14:11,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-11-18 10:14:11,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-11-18 10:14:11,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2018-11-18 10:14:11,883 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2018-11-18 10:14:11,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:14:11,883 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2018-11-18 10:14:11,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-18 10:14:11,884 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2018-11-18 10:14:11,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-11-18 10:14:11,884 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:14:11,884 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:14:11,885 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 10:14:11,885 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:14:11,886 INFO L82 PathProgramCache]: Analyzing trace with hash 952137732, now seen corresponding path program 9 times [2018-11-18 10:14:11,886 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 10:14:11,886 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 10:14:11,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:14:11,887 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 10:14:11,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:14:11,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:14:11,994 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-11-18 10:14:11,994 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:14:11,994 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6013e879-ac89-4e0d-9842-69f1886e5c60/bin-2019/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 10:14:12,002 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 10:14:12,021 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-11-18 10:14:12,021 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 10:14:12,024 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 10:14:12,049 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-11-18 10:14:12,074 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 10:14:12,074 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-11-18 10:14:12,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-18 10:14:12,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-18 10:14:12,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2018-11-18 10:14:12,075 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 14 states. [2018-11-18 10:14:12,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:14:12,178 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2018-11-18 10:14:12,178 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-18 10:14:12,178 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 67 [2018-11-18 10:14:12,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:14:12,179 INFO L225 Difference]: With dead ends: 49 [2018-11-18 10:14:12,179 INFO L226 Difference]: Without dead ends: 45 [2018-11-18 10:14:12,179 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2018-11-18 10:14:12,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-11-18 10:14:12,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-11-18 10:14:12,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-11-18 10:14:12,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2018-11-18 10:14:12,183 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2018-11-18 10:14:12,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:14:12,183 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2018-11-18 10:14:12,183 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-18 10:14:12,183 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2018-11-18 10:14:12,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-11-18 10:14:12,184 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:14:12,184 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:14:12,184 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 10:14:12,185 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:14:12,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1540970204, now seen corresponding path program 10 times [2018-11-18 10:14:12,185 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 10:14:12,185 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 10:14:12,185 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:14:12,185 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 10:14:12,185 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:14:12,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:14:12,311 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2018-11-18 10:14:12,311 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:14:12,312 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6013e879-ac89-4e0d-9842-69f1886e5c60/bin-2019/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 10:14:12,323 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 10:14:12,350 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 10:14:12,350 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 10:14:12,352 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 10:14:12,376 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2018-11-18 10:14:12,392 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 10:14:12,392 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-11-18 10:14:12,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-18 10:14:12,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-18 10:14:12,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2018-11-18 10:14:12,393 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 15 states. [2018-11-18 10:14:12,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:14:12,532 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2018-11-18 10:14:12,532 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-18 10:14:12,532 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 73 [2018-11-18 10:14:12,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:14:12,533 INFO L225 Difference]: With dead ends: 52 [2018-11-18 10:14:12,533 INFO L226 Difference]: Without dead ends: 48 [2018-11-18 10:14:12,534 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=236, Invalid=414, Unknown=0, NotChecked=0, Total=650 [2018-11-18 10:14:12,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-11-18 10:14:12,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-11-18 10:14:12,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-11-18 10:14:12,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2018-11-18 10:14:12,537 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2018-11-18 10:14:12,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:14:12,537 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2018-11-18 10:14:12,537 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-18 10:14:12,537 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2018-11-18 10:14:12,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-11-18 10:14:12,542 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:14:12,542 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:14:12,542 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 10:14:12,542 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:14:12,543 INFO L82 PathProgramCache]: Analyzing trace with hash -2010530748, now seen corresponding path program 11 times [2018-11-18 10:14:12,543 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 10:14:12,543 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 10:14:12,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:14:12,544 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 10:14:12,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:14:12,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:14:12,670 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2018-11-18 10:14:12,670 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:14:12,670 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6013e879-ac89-4e0d-9842-69f1886e5c60/bin-2019/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 10:14:12,691 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-18 10:14:12,730 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-11-18 10:14:12,730 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 10:14:12,732 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 10:14:12,751 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2018-11-18 10:14:12,768 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 10:14:12,768 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-11-18 10:14:12,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-18 10:14:12,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-18 10:14:12,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2018-11-18 10:14:12,769 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 16 states. [2018-11-18 10:14:12,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:14:12,884 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2018-11-18 10:14:12,884 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-18 10:14:12,885 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 79 [2018-11-18 10:14:12,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:14:12,885 INFO L225 Difference]: With dead ends: 55 [2018-11-18 10:14:12,885 INFO L226 Difference]: Without dead ends: 51 [2018-11-18 10:14:12,886 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=275, Invalid=481, Unknown=0, NotChecked=0, Total=756 [2018-11-18 10:14:12,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-11-18 10:14:12,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-11-18 10:14:12,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-11-18 10:14:12,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2018-11-18 10:14:12,891 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2018-11-18 10:14:12,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:14:12,892 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2018-11-18 10:14:12,892 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-18 10:14:12,892 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2018-11-18 10:14:12,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-11-18 10:14:12,893 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:14:12,893 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:14:12,893 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 10:14:12,893 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:14:12,893 INFO L82 PathProgramCache]: Analyzing trace with hash -986521316, now seen corresponding path program 12 times [2018-11-18 10:14:12,893 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 10:14:12,893 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 10:14:12,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:14:12,894 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 10:14:12,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:14:12,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:14:13,016 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-11-18 10:14:13,017 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:14:13,017 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6013e879-ac89-4e0d-9842-69f1886e5c60/bin-2019/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 10:14:13,040 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-18 10:14:13,084 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-11-18 10:14:13,084 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 10:14:13,086 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 10:14:13,109 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-11-18 10:14:13,125 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 10:14:13,125 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-11-18 10:14:13,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-18 10:14:13,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-18 10:14:13,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2018-11-18 10:14:13,126 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 17 states. [2018-11-18 10:14:13,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:14:13,283 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2018-11-18 10:14:13,284 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-18 10:14:13,284 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 85 [2018-11-18 10:14:13,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:14:13,284 INFO L225 Difference]: With dead ends: 58 [2018-11-18 10:14:13,284 INFO L226 Difference]: Without dead ends: 54 [2018-11-18 10:14:13,285 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=317, Invalid=553, Unknown=0, NotChecked=0, Total=870 [2018-11-18 10:14:13,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-11-18 10:14:13,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-11-18 10:14:13,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-11-18 10:14:13,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2018-11-18 10:14:13,290 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2018-11-18 10:14:13,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:14:13,290 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2018-11-18 10:14:13,290 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-18 10:14:13,290 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2018-11-18 10:14:13,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-11-18 10:14:13,291 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:14:13,291 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:14:13,292 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 10:14:13,292 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:14:13,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1073897604, now seen corresponding path program 13 times [2018-11-18 10:14:13,292 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 10:14:13,292 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 10:14:13,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:14:13,293 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 10:14:13,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:14:13,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:14:13,435 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2018-11-18 10:14:13,435 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:14:13,435 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6013e879-ac89-4e0d-9842-69f1886e5c60/bin-2019/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 10:14:13,442 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:14:13,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:14:13,466 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 10:14:13,489 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2018-11-18 10:14:13,505 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 10:14:13,505 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-11-18 10:14:13,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-18 10:14:13,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-18 10:14:13,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2018-11-18 10:14:13,506 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 18 states. [2018-11-18 10:14:13,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:14:13,666 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2018-11-18 10:14:13,666 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-11-18 10:14:13,666 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 91 [2018-11-18 10:14:13,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:14:13,666 INFO L225 Difference]: With dead ends: 61 [2018-11-18 10:14:13,666 INFO L226 Difference]: Without dead ends: 57 [2018-11-18 10:14:13,667 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=362, Invalid=630, Unknown=0, NotChecked=0, Total=992 [2018-11-18 10:14:13,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-11-18 10:14:13,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-11-18 10:14:13,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-11-18 10:14:13,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2018-11-18 10:14:13,671 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2018-11-18 10:14:13,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:14:13,671 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2018-11-18 10:14:13,671 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-18 10:14:13,671 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2018-11-18 10:14:13,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-11-18 10:14:13,672 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:14:13,672 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:14:13,672 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 10:14:13,673 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:14:13,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1572648100, now seen corresponding path program 14 times [2018-11-18 10:14:13,673 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 10:14:13,673 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 10:14:13,673 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:14:13,673 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:14:13,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:14:13,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:14:13,836 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2018-11-18 10:14:13,837 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:14:13,837 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6013e879-ac89-4e0d-9842-69f1886e5c60/bin-2019/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 10:14:13,847 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-18 10:14:13,869 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-18 10:14:13,869 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 10:14:13,872 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 10:14:13,898 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2018-11-18 10:14:13,924 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 10:14:13,925 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-11-18 10:14:13,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-11-18 10:14:13,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-11-18 10:14:13,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2018-11-18 10:14:13,926 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 19 states. [2018-11-18 10:14:14,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:14:14,110 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2018-11-18 10:14:14,110 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-18 10:14:14,110 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 97 [2018-11-18 10:14:14,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:14:14,111 INFO L225 Difference]: With dead ends: 64 [2018-11-18 10:14:14,111 INFO L226 Difference]: Without dead ends: 60 [2018-11-18 10:14:14,112 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=410, Invalid=712, Unknown=0, NotChecked=0, Total=1122 [2018-11-18 10:14:14,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-11-18 10:14:14,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-11-18 10:14:14,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-11-18 10:14:14,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2018-11-18 10:14:14,116 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2018-11-18 10:14:14,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:14:14,116 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2018-11-18 10:14:14,116 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-11-18 10:14:14,116 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2018-11-18 10:14:14,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-11-18 10:14:14,117 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:14:14,117 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:14:14,117 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 10:14:14,118 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:14:14,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1584030916, now seen corresponding path program 15 times [2018-11-18 10:14:14,118 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 10:14:14,121 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 10:14:14,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:14:14,121 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 10:14:14,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:14:14,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:14:14,279 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2018-11-18 10:14:14,279 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:14:14,279 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6013e879-ac89-4e0d-9842-69f1886e5c60/bin-2019/uautomizer/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 10:14:14,285 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 10:14:14,313 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-11-18 10:14:14,313 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 10:14:14,315 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 10:14:14,340 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2018-11-18 10:14:14,356 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 10:14:14,356 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-11-18 10:14:14,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-18 10:14:14,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-18 10:14:14,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=223, Unknown=0, NotChecked=0, Total=380 [2018-11-18 10:14:14,357 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 20 states. [2018-11-18 10:14:14,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:14:14,520 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2018-11-18 10:14:14,520 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-11-18 10:14:14,521 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 103 [2018-11-18 10:14:14,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:14:14,521 INFO L225 Difference]: With dead ends: 67 [2018-11-18 10:14:14,521 INFO L226 Difference]: Without dead ends: 63 [2018-11-18 10:14:14,522 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=461, Invalid=799, Unknown=0, NotChecked=0, Total=1260 [2018-11-18 10:14:14,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-11-18 10:14:14,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-11-18 10:14:14,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-11-18 10:14:14,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2018-11-18 10:14:14,525 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 103 [2018-11-18 10:14:14,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:14:14,525 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2018-11-18 10:14:14,525 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-18 10:14:14,525 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2018-11-18 10:14:14,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-11-18 10:14:14,526 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:14:14,526 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:14:14,526 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 10:14:14,526 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:14:14,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1066046876, now seen corresponding path program 16 times [2018-11-18 10:14:14,527 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 10:14:14,527 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 10:14:14,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:14:14,527 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 10:14:14,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:14:14,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:14:14,676 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2018-11-18 10:14:14,676 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:14:14,676 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6013e879-ac89-4e0d-9842-69f1886e5c60/bin-2019/uautomizer/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 10:14:14,684 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 10:14:14,706 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 10:14:14,706 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 10:14:14,709 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 10:14:14,726 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2018-11-18 10:14:14,742 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 10:14:14,742 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-11-18 10:14:14,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-18 10:14:14,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-18 10:14:14,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=245, Unknown=0, NotChecked=0, Total=420 [2018-11-18 10:14:14,743 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 21 states. [2018-11-18 10:14:14,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:14:14,922 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2018-11-18 10:14:14,923 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-11-18 10:14:14,923 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 109 [2018-11-18 10:14:14,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:14:14,923 INFO L225 Difference]: With dead ends: 70 [2018-11-18 10:14:14,923 INFO L226 Difference]: Without dead ends: 66 [2018-11-18 10:14:14,924 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=515, Invalid=891, Unknown=0, NotChecked=0, Total=1406 [2018-11-18 10:14:14,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-11-18 10:14:14,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-11-18 10:14:14,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-11-18 10:14:14,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2018-11-18 10:14:14,926 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 109 [2018-11-18 10:14:14,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:14:14,927 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2018-11-18 10:14:14,927 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-18 10:14:14,927 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2018-11-18 10:14:14,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-11-18 10:14:14,927 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:14:14,927 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:14:14,927 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 10:14:14,927 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:14:14,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1300351236, now seen corresponding path program 17 times [2018-11-18 10:14:14,927 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 10:14:14,927 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 10:14:14,928 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:14:14,928 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 10:14:14,928 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:14:14,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:14:15,133 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2018-11-18 10:14:15,134 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:14:15,134 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6013e879-ac89-4e0d-9842-69f1886e5c60/bin-2019/uautomizer/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 10:14:15,140 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-18 10:14:15,178 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-11-18 10:14:15,178 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 10:14:15,181 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 10:14:15,199 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2018-11-18 10:14:15,215 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 10:14:15,215 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-11-18 10:14:15,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-11-18 10:14:15,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-11-18 10:14:15,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=268, Unknown=0, NotChecked=0, Total=462 [2018-11-18 10:14:15,216 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 22 states. [2018-11-18 10:14:15,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:14:15,398 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2018-11-18 10:14:15,398 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-11-18 10:14:15,398 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 115 [2018-11-18 10:14:15,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:14:15,399 INFO L225 Difference]: With dead ends: 73 [2018-11-18 10:14:15,399 INFO L226 Difference]: Without dead ends: 69 [2018-11-18 10:14:15,400 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=572, Invalid=988, Unknown=0, NotChecked=0, Total=1560 [2018-11-18 10:14:15,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-11-18 10:14:15,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-11-18 10:14:15,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-11-18 10:14:15,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2018-11-18 10:14:15,403 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 115 [2018-11-18 10:14:15,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:14:15,404 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2018-11-18 10:14:15,404 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-11-18 10:14:15,404 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2018-11-18 10:14:15,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-11-18 10:14:15,405 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:14:15,405 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:14:15,405 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 10:14:15,405 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:14:15,405 INFO L82 PathProgramCache]: Analyzing trace with hash 227065820, now seen corresponding path program 18 times [2018-11-18 10:14:15,405 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 10:14:15,405 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 10:14:15,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:14:15,406 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 10:14:15,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:14:15,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:14:15,671 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2018-11-18 10:14:15,671 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:14:15,671 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6013e879-ac89-4e0d-9842-69f1886e5c60/bin-2019/uautomizer/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 10:14:15,677 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-18 10:14:15,717 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-11-18 10:14:15,717 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 10:14:15,720 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 10:14:15,736 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2018-11-18 10:14:15,752 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 10:14:15,752 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-11-18 10:14:15,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-11-18 10:14:15,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-11-18 10:14:15,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=292, Unknown=0, NotChecked=0, Total=506 [2018-11-18 10:14:15,753 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 23 states. [2018-11-18 10:14:15,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:14:15,968 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2018-11-18 10:14:15,969 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-11-18 10:14:15,969 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 121 [2018-11-18 10:14:15,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:14:15,969 INFO L225 Difference]: With dead ends: 76 [2018-11-18 10:14:15,969 INFO L226 Difference]: Without dead ends: 72 [2018-11-18 10:14:15,970 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=632, Invalid=1090, Unknown=0, NotChecked=0, Total=1722 [2018-11-18 10:14:15,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-11-18 10:14:15,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-11-18 10:14:15,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-11-18 10:14:15,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2018-11-18 10:14:15,972 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 121 [2018-11-18 10:14:15,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:14:15,973 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2018-11-18 10:14:15,973 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-11-18 10:14:15,973 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2018-11-18 10:14:15,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-11-18 10:14:15,973 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:14:15,974 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:14:15,974 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 10:14:15,974 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:14:15,974 INFO L82 PathProgramCache]: Analyzing trace with hash -479687356, now seen corresponding path program 19 times [2018-11-18 10:14:15,974 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 10:14:15,974 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 10:14:15,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:14:15,975 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 10:14:15,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:14:15,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:14:16,182 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2018-11-18 10:14:16,182 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:14:16,182 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6013e879-ac89-4e0d-9842-69f1886e5c60/bin-2019/uautomizer/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 10:14:16,188 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:14:16,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:14:16,212 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 10:14:16,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2018-11-18 10:14:16,246 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 10:14:16,246 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-11-18 10:14:16,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-11-18 10:14:16,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-11-18 10:14:16,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=317, Unknown=0, NotChecked=0, Total=552 [2018-11-18 10:14:16,247 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 24 states. [2018-11-18 10:14:16,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:14:16,528 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2018-11-18 10:14:16,528 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-11-18 10:14:16,528 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 127 [2018-11-18 10:14:16,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:14:16,529 INFO L225 Difference]: With dead ends: 79 [2018-11-18 10:14:16,529 INFO L226 Difference]: Without dead ends: 75 [2018-11-18 10:14:16,530 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=695, Invalid=1197, Unknown=0, NotChecked=0, Total=1892 [2018-11-18 10:14:16,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-11-18 10:14:16,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-11-18 10:14:16,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-11-18 10:14:16,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2018-11-18 10:14:16,532 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 127 [2018-11-18 10:14:16,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:14:16,533 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2018-11-18 10:14:16,533 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-11-18 10:14:16,533 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2018-11-18 10:14:16,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-11-18 10:14:16,533 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:14:16,533 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:14:16,533 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 10:14:16,533 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:14:16,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1598174692, now seen corresponding path program 20 times [2018-11-18 10:14:16,533 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 10:14:16,534 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 10:14:16,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:14:16,535 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:14:16,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:14:16,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:14:16,738 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2018-11-18 10:14:16,738 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:14:16,738 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6013e879-ac89-4e0d-9842-69f1886e5c60/bin-2019/uautomizer/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 10:14:16,745 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-18 10:14:16,777 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-18 10:14:16,777 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 10:14:16,780 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 10:14:16,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2018-11-18 10:14:16,823 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 10:14:16,823 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-11-18 10:14:16,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-11-18 10:14:16,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-11-18 10:14:16,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=343, Unknown=0, NotChecked=0, Total=600 [2018-11-18 10:14:16,824 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 25 states. [2018-11-18 10:14:17,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:14:17,062 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2018-11-18 10:14:17,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-11-18 10:14:17,063 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 133 [2018-11-18 10:14:17,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:14:17,063 INFO L225 Difference]: With dead ends: 82 [2018-11-18 10:14:17,063 INFO L226 Difference]: Without dead ends: 78 [2018-11-18 10:14:17,064 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=761, Invalid=1309, Unknown=0, NotChecked=0, Total=2070 [2018-11-18 10:14:17,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-11-18 10:14:17,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-11-18 10:14:17,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-11-18 10:14:17,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2018-11-18 10:14:17,068 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 133 [2018-11-18 10:14:17,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:14:17,068 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2018-11-18 10:14:17,068 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-11-18 10:14:17,068 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2018-11-18 10:14:17,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2018-11-18 10:14:17,071 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:14:17,071 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:14:17,071 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 10:14:17,071 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:14:17,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1648275844, now seen corresponding path program 21 times [2018-11-18 10:14:17,071 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 10:14:17,071 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 10:14:17,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:14:17,072 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 10:14:17,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:14:17,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:14:17,292 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2018-11-18 10:14:17,293 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:14:17,293 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6013e879-ac89-4e0d-9842-69f1886e5c60/bin-2019/uautomizer/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 10:14:17,299 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 10:14:17,336 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-11-18 10:14:17,336 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 10:14:17,339 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 10:14:17,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2018-11-18 10:14:17,381 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 10:14:17,381 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-11-18 10:14:17,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-11-18 10:14:17,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-11-18 10:14:17,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=370, Unknown=0, NotChecked=0, Total=650 [2018-11-18 10:14:17,382 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 26 states. [2018-11-18 10:14:17,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:14:17,641 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2018-11-18 10:14:17,641 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-11-18 10:14:17,641 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 139 [2018-11-18 10:14:17,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:14:17,642 INFO L225 Difference]: With dead ends: 85 [2018-11-18 10:14:17,643 INFO L226 Difference]: Without dead ends: 81 [2018-11-18 10:14:17,643 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=830, Invalid=1426, Unknown=0, NotChecked=0, Total=2256 [2018-11-18 10:14:17,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-11-18 10:14:17,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-11-18 10:14:17,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-11-18 10:14:17,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2018-11-18 10:14:17,646 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 139 [2018-11-18 10:14:17,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:14:17,646 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2018-11-18 10:14:17,646 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-11-18 10:14:17,646 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2018-11-18 10:14:17,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2018-11-18 10:14:17,647 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:14:17,647 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:14:17,647 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 10:14:17,647 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:14:17,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1314278308, now seen corresponding path program 22 times [2018-11-18 10:14:17,648 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 10:14:17,648 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 10:14:17,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:14:17,648 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 10:14:17,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:14:17,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:14:17,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2018-11-18 10:14:17,871 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:14:17,871 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6013e879-ac89-4e0d-9842-69f1886e5c60/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 [2018-11-18 10:14:17,877 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 10:14:17,907 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 10:14:17,908 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 10:14:17,911 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 10:14:17,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2018-11-18 10:14:17,958 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 10:14:17,958 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-11-18 10:14:17,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-11-18 10:14:17,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-11-18 10:14:17,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=398, Unknown=0, NotChecked=0, Total=702 [2018-11-18 10:14:17,959 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 27 states. [2018-11-18 10:14:18,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:14:18,208 INFO L93 Difference]: Finished difference Result 88 states and 89 transitions. [2018-11-18 10:14:18,209 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-11-18 10:14:18,209 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 145 [2018-11-18 10:14:18,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:14:18,210 INFO L225 Difference]: With dead ends: 88 [2018-11-18 10:14:18,210 INFO L226 Difference]: Without dead ends: 84 [2018-11-18 10:14:18,210 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=902, Invalid=1548, Unknown=0, NotChecked=0, Total=2450 [2018-11-18 10:14:18,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-11-18 10:14:18,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-11-18 10:14:18,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-11-18 10:14:18,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2018-11-18 10:14:18,213 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 145 [2018-11-18 10:14:18,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:14:18,213 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2018-11-18 10:14:18,213 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-11-18 10:14:18,213 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2018-11-18 10:14:18,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2018-11-18 10:14:18,214 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:14:18,214 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:14:18,214 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 10:14:18,214 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:14:18,215 INFO L82 PathProgramCache]: Analyzing trace with hash 2015638980, now seen corresponding path program 23 times [2018-11-18 10:14:18,215 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 10:14:18,215 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 10:14:18,215 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:14:18,215 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 10:14:18,215 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:14:18,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:14:18,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2018-11-18 10:14:18,440 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:14:18,440 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6013e879-ac89-4e0d-9842-69f1886e5c60/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 [2018-11-18 10:14:18,447 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-18 10:14:18,506 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-11-18 10:14:18,506 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 10:14:18,509 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 10:14:18,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2018-11-18 10:14:18,569 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 10:14:18,569 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-11-18 10:14:18,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-11-18 10:14:18,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-11-18 10:14:18,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=427, Unknown=0, NotChecked=0, Total=756 [2018-11-18 10:14:18,570 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand 28 states. [2018-11-18 10:14:18,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:14:18,862 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2018-11-18 10:14:18,862 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-11-18 10:14:18,862 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 151 [2018-11-18 10:14:18,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:14:18,863 INFO L225 Difference]: With dead ends: 91 [2018-11-18 10:14:18,863 INFO L226 Difference]: Without dead ends: 87 [2018-11-18 10:14:18,864 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=977, Invalid=1675, Unknown=0, NotChecked=0, Total=2652 [2018-11-18 10:14:18,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-11-18 10:14:18,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-11-18 10:14:18,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-11-18 10:14:18,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2018-11-18 10:14:18,869 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 151 [2018-11-18 10:14:18,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:14:18,869 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2018-11-18 10:14:18,869 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-11-18 10:14:18,870 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2018-11-18 10:14:18,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2018-11-18 10:14:18,870 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:14:18,870 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:14:18,871 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 10:14:18,871 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:14:18,871 INFO L82 PathProgramCache]: Analyzing trace with hash 483163804, now seen corresponding path program 24 times [2018-11-18 10:14:18,871 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 10:14:18,871 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 10:14:18,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:14:18,872 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 10:14:18,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:14:18,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:14:19,132 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2018-11-18 10:14:19,132 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:14:19,132 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6013e879-ac89-4e0d-9842-69f1886e5c60/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 [2018-11-18 10:14:19,138 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-18 10:14:19,184 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-11-18 10:14:19,185 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 10:14:19,188 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 10:14:19,223 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2018-11-18 10:14:19,239 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 10:14:19,239 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-11-18 10:14:19,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-11-18 10:14:19,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-11-18 10:14:19,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=457, Unknown=0, NotChecked=0, Total=812 [2018-11-18 10:14:19,240 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 29 states. [2018-11-18 10:14:19,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:14:19,515 INFO L93 Difference]: Finished difference Result 94 states and 95 transitions. [2018-11-18 10:14:19,515 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-11-18 10:14:19,515 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 157 [2018-11-18 10:14:19,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:14:19,516 INFO L225 Difference]: With dead ends: 94 [2018-11-18 10:14:19,516 INFO L226 Difference]: Without dead ends: 90 [2018-11-18 10:14:19,516 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1055, Invalid=1807, Unknown=0, NotChecked=0, Total=2862 [2018-11-18 10:14:19,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-11-18 10:14:19,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-11-18 10:14:19,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-11-18 10:14:19,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2018-11-18 10:14:19,519 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 157 [2018-11-18 10:14:19,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:14:19,519 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2018-11-18 10:14:19,519 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-11-18 10:14:19,519 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2018-11-18 10:14:19,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2018-11-18 10:14:19,520 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:14:19,520 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:14:19,520 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 10:14:19,520 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:14:19,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1060706820, now seen corresponding path program 25 times [2018-11-18 10:14:19,520 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 10:14:19,521 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 10:14:19,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:14:19,521 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 10:14:19,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:14:19,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:14:21,054 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 0 proven. 999 refuted. 0 times theorem prover too weak. 901 trivial. 0 not checked. [2018-11-18 10:14:21,054 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:14:21,054 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6013e879-ac89-4e0d-9842-69f1886e5c60/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 [2018-11-18 10:14:21,060 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:14:21,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:14:21,102 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 10:14:24,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 949 proven. 50 refuted. 0 times theorem prover too weak. 901 trivial. 0 not checked. [2018-11-18 10:14:24,238 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 10:14:24,238 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 116 [2018-11-18 10:14:24,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 116 states [2018-11-18 10:14:24,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2018-11-18 10:14:24,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=843, Invalid=12497, Unknown=0, NotChecked=0, Total=13340 [2018-11-18 10:14:24,241 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand 116 states. [2018-11-18 10:14:27,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:14:27,663 INFO L93 Difference]: Finished difference Result 93 states and 95 transitions. [2018-11-18 10:14:27,663 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-11-18 10:14:27,663 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 163 [2018-11-18 10:14:27,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:14:27,664 INFO L225 Difference]: With dead ends: 93 [2018-11-18 10:14:27,664 INFO L226 Difference]: Without dead ends: 0 [2018-11-18 10:14:27,666 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4275 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=2079, Invalid=26651, Unknown=0, NotChecked=0, Total=28730 [2018-11-18 10:14:27,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-18 10:14:27,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-18 10:14:27,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-18 10:14:27,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-18 10:14:27,667 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 163 [2018-11-18 10:14:27,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:14:27,667 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-18 10:14:27,667 INFO L481 AbstractCegarLoop]: Interpolant automaton has 116 states. [2018-11-18 10:14:27,667 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-18 10:14:27,667 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-18 10:14:27,670 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-18 10:14:27,695 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-18 10:14:27,695 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-18 10:14:27,695 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-18 10:14:27,695 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-18 10:14:27,695 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-18 10:14:27,695 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-18 10:14:27,695 INFO L425 ceAbstractionStarter]: For program point sumEXIT(lines 3 9) no Hoare annotation was computed. [2018-11-18 10:14:27,695 INFO L421 ceAbstractionStarter]: At program point L7(line 7) the Hoare annotation is: (and (= sum_~m |sum_#in~m|) (= sum_~n |sum_#in~n|) (< 0 sum_~n)) [2018-11-18 10:14:27,695 INFO L425 ceAbstractionStarter]: For program point L7-1(line 7) no Hoare annotation was computed. [2018-11-18 10:14:27,695 INFO L425 ceAbstractionStarter]: For program point L4(lines 4 8) no Hoare annotation was computed. [2018-11-18 10:14:27,695 INFO L425 ceAbstractionStarter]: For program point sumFINAL(lines 3 9) no Hoare annotation was computed. [2018-11-18 10:14:27,695 INFO L428 ceAbstractionStarter]: At program point sumENTRY(lines 3 9) the Hoare annotation is: true [2018-11-18 10:14:27,695 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 11 18) the Hoare annotation is: true [2018-11-18 10:14:27,695 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 11 18) no Hoare annotation was computed. [2018-11-18 10:14:27,695 INFO L425 ceAbstractionStarter]: For program point L16(line 16) no Hoare annotation was computed. [2018-11-18 10:14:27,695 INFO L425 ceAbstractionStarter]: For program point L15(lines 15 17) no Hoare annotation was computed. [2018-11-18 10:14:27,696 INFO L421 ceAbstractionStarter]: At program point L14(line 14) the Hoare annotation is: (and (<= main_~a~0 25) (<= 25 main_~a~0)) [2018-11-18 10:14:27,696 INFO L425 ceAbstractionStarter]: For program point L14-1(line 14) no Hoare annotation was computed. [2018-11-18 10:14:27,696 INFO L425 ceAbstractionStarter]: For program point L15-2(lines 11 18) no Hoare annotation was computed. [2018-11-18 10:14:27,696 INFO L425 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2018-11-18 10:14:27,698 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.11 10:14:27 BoogieIcfgContainer [2018-11-18 10:14:27,698 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-18 10:14:27,698 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-18 10:14:27,698 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-18 10:14:27,699 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-18 10:14:27,699 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 10:14:08" (3/4) ... [2018-11-18 10:14:27,701 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-18 10:14:27,711 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-18 10:14:27,711 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure sum [2018-11-18 10:14:27,711 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-18 10:14:27,714 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-11-18 10:14:27,714 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2018-11-18 10:14:27,715 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-18 10:14:27,739 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_6013e879-ac89-4e0d-9842-69f1886e5c60/bin-2019/uautomizer/witness.graphml [2018-11-18 10:14:27,739 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-18 10:14:27,739 INFO L168 Benchmark]: Toolchain (without parser) took 19585.07 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 343.4 MB). Free memory was 951.7 MB in the beginning and 1.3 GB in the end (delta: -386.8 MB). Peak memory consumption was 439.1 MB. Max. memory is 11.5 GB. [2018-11-18 10:14:27,740 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 979.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 10:14:27,741 INFO L168 Benchmark]: CACSL2BoogieTranslator took 149.08 ms. Allocated memory is still 1.0 GB. Free memory was 951.7 MB in the beginning and 941.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-18 10:14:27,741 INFO L168 Benchmark]: Boogie Preprocessor took 19.27 ms. Allocated memory is still 1.0 GB. Free memory was 941.0 MB in the beginning and 938.3 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-18 10:14:27,741 INFO L168 Benchmark]: RCFGBuilder took 264.46 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 128.5 MB). Free memory was 938.3 MB in the beginning and 1.1 GB in the end (delta: -180.4 MB). Peak memory consumption was 20.7 MB. Max. memory is 11.5 GB. [2018-11-18 10:14:27,741 INFO L168 Benchmark]: TraceAbstraction took 19107.73 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 190.8 MB). Free memory was 1.1 GB in the beginning and 832.0 MB in the end (delta: 286.8 MB). Peak memory consumption was 477.6 MB. Max. memory is 11.5 GB. [2018-11-18 10:14:27,742 INFO L168 Benchmark]: Witness Printer took 40.73 ms. Allocated memory was 1.3 GB in the beginning and 1.4 GB in the end (delta: 24.1 MB). Free memory was 832.0 MB in the beginning and 1.3 GB in the end (delta: -506.5 MB). Peak memory consumption was 8.2 kB. Max. memory is 11.5 GB. [2018-11-18 10:14:27,744 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 979.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 149.08 ms. Allocated memory is still 1.0 GB. Free memory was 951.7 MB in the beginning and 941.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 19.27 ms. Allocated memory is still 1.0 GB. Free memory was 941.0 MB in the beginning and 938.3 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 264.46 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 128.5 MB). Free memory was 938.3 MB in the beginning and 1.1 GB in the end (delta: -180.4 MB). Peak memory consumption was 20.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 19107.73 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 190.8 MB). Free memory was 1.1 GB in the beginning and 832.0 MB in the end (delta: 286.8 MB). Peak memory consumption was 477.6 MB. Max. memory is 11.5 GB. * Witness Printer took 40.73 ms. Allocated memory was 1.3 GB in the beginning and 1.4 GB in the end (delta: 24.1 MB). Free memory was 832.0 MB in the beginning and 1.3 GB in the end (delta: -506.5 MB). Peak memory consumption was 8.2 kB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. SAFE Result, 19.0s OverallTime, 26 OverallIterations, 26 TraceHistogramMax, 7.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 337 SDtfs, 916 SDslu, 4555 SDs, 0 SdLazy, 5554 SolverSat, 328 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3437 GetRequests, 2569 SyntacticMatches, 0 SemanticMatches, 868 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6875 ImplicationChecksByTransitivity, 12.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=90occurred in iteration=25, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 26 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 9 PreInvPairs, 9 NumberOfFragments, 22 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 3 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 8.9s InterpolantComputationTime, 4563 NumberOfCodeBlocks, 4563 NumberOfCodeBlocksAsserted, 223 NumberOfCheckSat, 4512 ConstructedInterpolants, 0 QuantifiedInterpolants, 1548000 SizeOfPredicates, 403 NumberOfNonLiveVariables, 6750 ConjunctsInSsa, 963 ConjunctsInUnsatCore, 51 InterpolantComputations, 1 PerfectInterpolantSequences, 17751/33800 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...