./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive/Addition03_true-unreach-call_true-no-overflow_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 635dfa2a Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive/Addition03_true-unreach-call_true-no-overflow_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/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 dc212c6f03bbd9a964d699fa8baa949beea27f48 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Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-635dfa2 [2018-12-01 19:14:31,669 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-01 19:14:31,671 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-01 19:14:31,679 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-01 19:14:31,679 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-01 19:14:31,679 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-01 19:14:31,680 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-01 19:14:31,681 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-01 19:14:31,681 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-01 19:14:31,682 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-01 19:14:31,682 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-01 19:14:31,682 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-01 19:14:31,683 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-01 19:14:31,684 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-01 19:14:31,684 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-01 19:14:31,684 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-01 19:14:31,685 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-01 19:14:31,686 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-01 19:14:31,686 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-01 19:14:31,687 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-01 19:14:31,688 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-01 19:14:31,688 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-01 19:14:31,690 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-01 19:14:31,690 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-01 19:14:31,690 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-01 19:14:31,691 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-01 19:14:31,691 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-01 19:14:31,692 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-01 19:14:31,692 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-01 19:14:31,693 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-01 19:14:31,693 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-01 19:14:31,693 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-01 19:14:31,693 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-01 19:14:31,693 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-01 19:14:31,694 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-01 19:14:31,694 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-01 19:14:31,694 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-12-01 19:14:31,701 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-01 19:14:31,701 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-01 19:14:31,702 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-01 19:14:31,702 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-01 19:14:31,703 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-01 19:14:31,703 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-01 19:14:31,703 INFO L133 SettingsManager]: * Use SBE=true [2018-12-01 19:14:31,703 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-01 19:14:31,703 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-01 19:14:31,703 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-01 19:14:31,704 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-01 19:14:31,704 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-01 19:14:31,704 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-01 19:14:31,704 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-01 19:14:31,704 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-01 19:14:31,704 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-01 19:14:31,704 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-01 19:14:31,705 INFO L133 SettingsManager]: * Use constant arrays=true [2018-12-01 19:14:31,705 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-01 19:14:31,705 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-01 19:14:31,705 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-01 19:14:31,705 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-01 19:14:31,705 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-01 19:14:31,706 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-01 19:14:31,706 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-01 19:14:31,706 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-01 19:14:31,706 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-01 19:14:31,706 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-12-01 19:14:31,706 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-01 19:14:31,706 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-01 19:14:31,706 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_794d7585-3a8d-4dfd-9445-80f5064dbb6a/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 -> dc212c6f03bbd9a964d699fa8baa949beea27f48 [2018-12-01 19:14:31,727 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-01 19:14:31,733 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-01 19:14:31,735 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-01 19:14:31,736 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-01 19:14:31,736 INFO L276 PluginConnector]: CDTParser initialized [2018-12-01 19:14:31,736 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/bin-2019/uautomizer/../../sv-benchmarks/c/recursive/Addition03_true-unreach-call_true-no-overflow_true-termination.c [2018-12-01 19:14:31,768 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/bin-2019/uautomizer/data/f23412062/d36b8ad16e5e411a980af5220f3615b9/FLAGb84d100c3 [2018-12-01 19:14:32,059 INFO L307 CDTParser]: Found 1 translation units. [2018-12-01 19:14:32,059 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/sv-benchmarks/c/recursive/Addition03_true-unreach-call_true-no-overflow_true-termination.c [2018-12-01 19:14:32,063 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/bin-2019/uautomizer/data/f23412062/d36b8ad16e5e411a980af5220f3615b9/FLAGb84d100c3 [2018-12-01 19:14:32,497 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/bin-2019/uautomizer/data/f23412062/d36b8ad16e5e411a980af5220f3615b9 [2018-12-01 19:14:32,499 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-01 19:14:32,500 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-01 19:14:32,500 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-01 19:14:32,500 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-01 19:14:32,502 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-01 19:14:32,502 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 07:14:32" (1/1) ... [2018-12-01 19:14:32,504 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2251f510 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 07:14:32, skipping insertion in model container [2018-12-01 19:14:32,504 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 07:14:32" (1/1) ... [2018-12-01 19:14:32,508 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-01 19:14:32,517 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-01 19:14:32,597 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-01 19:14:32,599 INFO L191 MainTranslator]: Completed pre-run [2018-12-01 19:14:32,608 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-01 19:14:32,616 INFO L195 MainTranslator]: Completed translation [2018-12-01 19:14:32,616 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 07:14:32 WrapperNode [2018-12-01 19:14:32,616 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-01 19:14:32,617 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-01 19:14:32,617 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-01 19:14:32,617 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-01 19:14:32,621 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 07:14:32" (1/1) ... [2018-12-01 19:14:32,624 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 07:14:32" (1/1) ... [2018-12-01 19:14:32,628 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-01 19:14:32,628 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-01 19:14:32,628 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-01 19:14:32,628 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-01 19:14:32,633 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 07:14:32" (1/1) ... [2018-12-01 19:14:32,633 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 07:14:32" (1/1) ... [2018-12-01 19:14:32,634 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 07:14:32" (1/1) ... [2018-12-01 19:14:32,634 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 07:14:32" (1/1) ... [2018-12-01 19:14:32,636 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 07:14:32" (1/1) ... [2018-12-01 19:14:32,637 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 07:14:32" (1/1) ... [2018-12-01 19:14:32,637 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 07:14:32" (1/1) ... [2018-12-01 19:14:32,638 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-01 19:14:32,638 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-01 19:14:32,638 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-01 19:14:32,639 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-01 19:14:32,639 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 07:14:32" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/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 [2018-12-01 19:14:32,704 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-01 19:14:32,704 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-01 19:14:32,704 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-01 19:14:32,704 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-01 19:14:32,704 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-01 19:14:32,704 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-01 19:14:32,705 INFO L130 BoogieDeclarations]: Found specification of procedure addition [2018-12-01 19:14:32,705 INFO L138 BoogieDeclarations]: Found implementation of procedure addition [2018-12-01 19:14:32,786 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-01 19:14:32,786 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-12-01 19:14:32,787 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 07:14:32 BoogieIcfgContainer [2018-12-01 19:14:32,787 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-01 19:14:32,787 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-01 19:14:32,787 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-01 19:14:32,789 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-01 19:14:32,790 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.12 07:14:32" (1/3) ... [2018-12-01 19:14:32,790 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60e17604 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.12 07:14:32, skipping insertion in model container [2018-12-01 19:14:32,790 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 07:14:32" (2/3) ... [2018-12-01 19:14:32,791 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60e17604 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.12 07:14:32, skipping insertion in model container [2018-12-01 19:14:32,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 07:14:32" (3/3) ... [2018-12-01 19:14:32,792 INFO L112 eAbstractionObserver]: Analyzing ICFG Addition03_true-unreach-call_true-no-overflow_true-termination.c [2018-12-01 19:14:32,798 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-01 19:14:32,802 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-01 19:14:32,812 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-01 19:14:32,830 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-12-01 19:14:32,830 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-01 19:14:32,830 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-01 19:14:32,830 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-01 19:14:32,831 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-01 19:14:32,831 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-01 19:14:32,831 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-01 19:14:32,831 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-01 19:14:32,831 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-01 19:14:32,841 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2018-12-01 19:14:32,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-12-01 19:14:32,845 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 19:14:32,846 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 19:14:32,847 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 19:14:32,850 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 19:14:32,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1540493149, now seen corresponding path program 1 times [2018-12-01 19:14:32,851 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 19:14:32,852 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 19:14:32,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:14:32,881 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 19:14:32,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:14:32,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:14:32,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 19:14:32,947 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-01 19:14:32,948 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-01 19:14:32,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-01 19:14:32,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-01 19:14:32,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-01 19:14:32,960 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2018-12-01 19:14:33,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 19:14:33,021 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2018-12-01 19:14:33,021 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-01 19:14:33,022 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-12-01 19:14:33,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 19:14:33,028 INFO L225 Difference]: With dead ends: 36 [2018-12-01 19:14:33,028 INFO L226 Difference]: Without dead ends: 22 [2018-12-01 19:14:33,030 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-12-01 19:14:33,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-12-01 19:14:33,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-12-01 19:14:33,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-12-01 19:14:33,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2018-12-01 19:14:33,054 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 13 [2018-12-01 19:14:33,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 19:14:33,054 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2018-12-01 19:14:33,054 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-01 19:14:33,054 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2018-12-01 19:14:33,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-12-01 19:14:33,056 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 19:14:33,056 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 19:14:33,056 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 19:14:33,056 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 19:14:33,056 INFO L82 PathProgramCache]: Analyzing trace with hash -35294164, now seen corresponding path program 1 times [2018-12-01 19:14:33,056 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 19:14:33,056 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 19:14:33,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:14:33,057 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 19:14:33,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:14:33,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:14:33,093 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-01 19:14:33,093 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 19:14:33,093 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/bin-2019/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 19:14:33,100 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 19:14:33,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:14:33,117 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 19:14:33,145 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-01 19:14:33,161 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 19:14:33,161 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-12-01 19:14:33,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-01 19:14:33,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-01 19:14:33,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-12-01 19:14:33,162 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand 6 states. [2018-12-01 19:14:33,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 19:14:33,224 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2018-12-01 19:14:33,225 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-01 19:14:33,225 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2018-12-01 19:14:33,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 19:14:33,225 INFO L225 Difference]: With dead ends: 29 [2018-12-01 19:14:33,225 INFO L226 Difference]: Without dead ends: 25 [2018-12-01 19:14:33,226 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-12-01 19:14:33,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-12-01 19:14:33,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-12-01 19:14:33,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-12-01 19:14:33,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2018-12-01 19:14:33,230 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 20 [2018-12-01 19:14:33,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 19:14:33,230 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2018-12-01 19:14:33,230 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-01 19:14:33,230 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2018-12-01 19:14:33,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-12-01 19:14:33,231 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 19:14:33,231 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 19:14:33,231 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 19:14:33,231 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 19:14:33,231 INFO L82 PathProgramCache]: Analyzing trace with hash -1261456781, now seen corresponding path program 2 times [2018-12-01 19:14:33,231 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 19:14:33,231 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 19:14:33,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:14:33,232 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 19:14:33,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:14:33,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:14:33,281 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-12-01 19:14:33,281 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 19:14:33,282 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/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 [2018-12-01 19:14:33,289 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-01 19:14:33,299 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-01 19:14:33,299 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 19:14:33,301 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 19:14:33,310 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-12-01 19:14:33,325 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 19:14:33,325 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-12-01 19:14:33,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-01 19:14:33,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-01 19:14:33,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-12-01 19:14:33,326 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand 7 states. [2018-12-01 19:14:33,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 19:14:33,382 INFO L93 Difference]: Finished difference Result 32 states and 39 transitions. [2018-12-01 19:14:33,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-01 19:14:33,382 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2018-12-01 19:14:33,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 19:14:33,383 INFO L225 Difference]: With dead ends: 32 [2018-12-01 19:14:33,383 INFO L226 Difference]: Without dead ends: 28 [2018-12-01 19:14:33,383 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-12-01 19:14:33,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-12-01 19:14:33,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-12-01 19:14:33,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-12-01 19:14:33,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2018-12-01 19:14:33,389 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 27 [2018-12-01 19:14:33,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 19:14:33,389 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2018-12-01 19:14:33,389 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-01 19:14:33,389 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2018-12-01 19:14:33,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-12-01 19:14:33,390 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 19:14:33,390 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 19:14:33,391 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 19:14:33,391 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 19:14:33,391 INFO L82 PathProgramCache]: Analyzing trace with hash 2131329174, now seen corresponding path program 3 times [2018-12-01 19:14:33,391 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 19:14:33,391 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 19:14:33,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:14:33,392 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 19:14:33,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:14:33,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:14:33,432 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-12-01 19:14:33,433 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 19:14:33,433 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/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 [2018-12-01 19:14:33,441 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-01 19:14:33,452 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-12-01 19:14:33,452 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 19:14:33,454 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 19:14:33,461 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-12-01 19:14:33,485 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 19:14:33,485 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-12-01 19:14:33,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-01 19:14:33,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-01 19:14:33,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-12-01 19:14:33,485 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand 8 states. [2018-12-01 19:14:33,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 19:14:33,550 INFO L93 Difference]: Finished difference Result 35 states and 43 transitions. [2018-12-01 19:14:33,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-01 19:14:33,550 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 34 [2018-12-01 19:14:33,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 19:14:33,551 INFO L225 Difference]: With dead ends: 35 [2018-12-01 19:14:33,551 INFO L226 Difference]: Without dead ends: 31 [2018-12-01 19:14:33,552 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2018-12-01 19:14:33,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-12-01 19:14:33,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-12-01 19:14:33,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-12-01 19:14:33,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2018-12-01 19:14:33,557 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 34 [2018-12-01 19:14:33,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 19:14:33,558 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2018-12-01 19:14:33,558 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-01 19:14:33,558 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2018-12-01 19:14:33,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-12-01 19:14:33,559 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 19:14:33,559 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 19:14:33,559 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 19:14:33,560 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 19:14:33,560 INFO L82 PathProgramCache]: Analyzing trace with hash -867295607, now seen corresponding path program 4 times [2018-12-01 19:14:33,560 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 19:14:33,560 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 19:14:33,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:14:33,561 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 19:14:33,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:14:33,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:14:33,621 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2018-12-01 19:14:33,621 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 19:14:33,621 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/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 [2018-12-01 19:14:33,629 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-01 19:14:33,643 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-01 19:14:33,644 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 19:14:33,646 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 19:14:33,660 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2018-12-01 19:14:33,684 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 19:14:33,684 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-12-01 19:14:33,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-01 19:14:33,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-01 19:14:33,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-12-01 19:14:33,685 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand 9 states. [2018-12-01 19:14:33,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 19:14:33,774 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2018-12-01 19:14:33,774 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-01 19:14:33,774 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 41 [2018-12-01 19:14:33,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 19:14:33,775 INFO L225 Difference]: With dead ends: 38 [2018-12-01 19:14:33,775 INFO L226 Difference]: Without dead ends: 34 [2018-12-01 19:14:33,775 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2018-12-01 19:14:33,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-12-01 19:14:33,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-12-01 19:14:33,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-12-01 19:14:33,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2018-12-01 19:14:33,779 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 41 [2018-12-01 19:14:33,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 19:14:33,780 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2018-12-01 19:14:33,780 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-01 19:14:33,780 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2018-12-01 19:14:33,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-12-01 19:14:33,780 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 19:14:33,780 INFO L402 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 19:14:33,781 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 19:14:33,781 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 19:14:33,781 INFO L82 PathProgramCache]: Analyzing trace with hash -943688704, now seen corresponding path program 5 times [2018-12-01 19:14:33,781 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 19:14:33,781 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 19:14:33,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:14:33,782 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 19:14:33,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:14:33,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:14:33,855 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2018-12-01 19:14:33,855 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 19:14:33,855 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/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 [2018-12-01 19:14:33,861 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-01 19:14:33,877 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-12-01 19:14:33,877 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 19:14:33,879 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 19:14:33,889 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2018-12-01 19:14:33,903 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 19:14:33,903 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-12-01 19:14:33,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-01 19:14:33,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-01 19:14:33,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-12-01 19:14:33,904 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand 10 states. [2018-12-01 19:14:33,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 19:14:33,988 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2018-12-01 19:14:33,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-01 19:14:33,988 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 48 [2018-12-01 19:14:33,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 19:14:33,989 INFO L225 Difference]: With dead ends: 41 [2018-12-01 19:14:33,989 INFO L226 Difference]: Without dead ends: 37 [2018-12-01 19:14:33,990 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2018-12-01 19:14:33,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-12-01 19:14:33,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-12-01 19:14:33,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-12-01 19:14:33,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2018-12-01 19:14:33,994 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 48 [2018-12-01 19:14:33,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 19:14:33,994 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2018-12-01 19:14:33,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-01 19:14:33,994 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2018-12-01 19:14:33,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-12-01 19:14:33,995 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 19:14:33,995 INFO L402 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 19:14:33,995 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 19:14:33,995 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 19:14:33,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1959654303, now seen corresponding path program 6 times [2018-12-01 19:14:33,995 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 19:14:33,995 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 19:14:33,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:14:33,996 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 19:14:33,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:14:34,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:14:34,078 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-12-01 19:14:34,078 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 19:14:34,078 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/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 [2018-12-01 19:14:34,084 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-01 19:14:34,099 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-12-01 19:14:34,099 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 19:14:34,106 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 19:14:34,117 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-12-01 19:14:34,131 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 19:14:34,131 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-12-01 19:14:34,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-01 19:14:34,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-01 19:14:34,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2018-12-01 19:14:34,132 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand 11 states. [2018-12-01 19:14:34,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 19:14:34,224 INFO L93 Difference]: Finished difference Result 44 states and 55 transitions. [2018-12-01 19:14:34,224 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-01 19:14:34,224 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 55 [2018-12-01 19:14:34,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 19:14:34,225 INFO L225 Difference]: With dead ends: 44 [2018-12-01 19:14:34,225 INFO L226 Difference]: Without dead ends: 40 [2018-12-01 19:14:34,225 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2018-12-01 19:14:34,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-12-01 19:14:34,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-12-01 19:14:34,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-12-01 19:14:34,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2018-12-01 19:14:34,230 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 55 [2018-12-01 19:14:34,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 19:14:34,230 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2018-12-01 19:14:34,230 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-01 19:14:34,230 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2018-12-01 19:14:34,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-12-01 19:14:34,231 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 19:14:34,231 INFO L402 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 19:14:34,231 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 19:14:34,231 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 19:14:34,232 INFO L82 PathProgramCache]: Analyzing trace with hash 75083370, now seen corresponding path program 7 times [2018-12-01 19:14:34,232 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 19:14:34,232 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 19:14:34,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:14:34,232 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 19:14:34,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:14:34,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:14:34,305 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2018-12-01 19:14:34,305 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 19:14:34,305 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/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 [2018-12-01 19:14:34,311 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 19:14:34,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:14:34,325 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 19:14:34,335 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2018-12-01 19:14:34,355 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 19:14:34,355 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-12-01 19:14:34,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-01 19:14:34,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-01 19:14:34,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2018-12-01 19:14:34,355 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand 12 states. [2018-12-01 19:14:34,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 19:14:34,455 INFO L93 Difference]: Finished difference Result 47 states and 59 transitions. [2018-12-01 19:14:34,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-01 19:14:34,455 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 62 [2018-12-01 19:14:34,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 19:14:34,456 INFO L225 Difference]: With dead ends: 47 [2018-12-01 19:14:34,456 INFO L226 Difference]: Without dead ends: 43 [2018-12-01 19:14:34,456 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2018-12-01 19:14:34,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-12-01 19:14:34,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-12-01 19:14:34,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-12-01 19:14:34,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 55 transitions. [2018-12-01 19:14:34,460 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 55 transitions. Word has length 62 [2018-12-01 19:14:34,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 19:14:34,460 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 55 transitions. [2018-12-01 19:14:34,460 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-01 19:14:34,461 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 55 transitions. [2018-12-01 19:14:34,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-12-01 19:14:34,461 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 19:14:34,461 INFO L402 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 19:14:34,461 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 19:14:34,462 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 19:14:34,462 INFO L82 PathProgramCache]: Analyzing trace with hash 980406709, now seen corresponding path program 8 times [2018-12-01 19:14:34,462 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 19:14:34,462 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 19:14:34,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:14:34,462 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 19:14:34,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:14:34,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:14:34,526 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2018-12-01 19:14:34,526 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 19:14:34,527 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/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 [2018-12-01 19:14:34,534 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-01 19:14:34,551 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-01 19:14:34,551 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 19:14:34,554 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 19:14:34,571 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2018-12-01 19:14:34,595 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 19:14:34,595 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-12-01 19:14:34,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-12-01 19:14:34,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-12-01 19:14:34,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2018-12-01 19:14:34,596 INFO L87 Difference]: Start difference. First operand 43 states and 55 transitions. Second operand 13 states. [2018-12-01 19:14:34,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 19:14:34,719 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2018-12-01 19:14:34,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-12-01 19:14:34,719 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 69 [2018-12-01 19:14:34,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 19:14:34,720 INFO L225 Difference]: With dead ends: 50 [2018-12-01 19:14:34,720 INFO L226 Difference]: Without dead ends: 46 [2018-12-01 19:14:34,720 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2018-12-01 19:14:34,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-12-01 19:14:34,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-12-01 19:14:34,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-12-01 19:14:34,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 59 transitions. [2018-12-01 19:14:34,724 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 59 transitions. Word has length 69 [2018-12-01 19:14:34,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 19:14:34,725 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 59 transitions. [2018-12-01 19:14:34,725 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-12-01 19:14:34,725 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 59 transitions. [2018-12-01 19:14:34,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-12-01 19:14:34,725 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 19:14:34,726 INFO L402 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 19:14:34,726 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 19:14:34,726 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 19:14:34,726 INFO L82 PathProgramCache]: Analyzing trace with hash -654012460, now seen corresponding path program 9 times [2018-12-01 19:14:34,726 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 19:14:34,726 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 19:14:34,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:14:34,727 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 19:14:34,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:14:34,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:14:34,798 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2018-12-01 19:14:34,798 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 19:14:34,798 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/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 [2018-12-01 19:14:34,804 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-01 19:14:34,823 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-12-01 19:14:34,824 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 19:14:34,825 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 19:14:34,844 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2018-12-01 19:14:34,860 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 19:14:34,860 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-12-01 19:14:34,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-12-01 19:14:34,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-12-01 19:14:34,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2018-12-01 19:14:34,860 INFO L87 Difference]: Start difference. First operand 46 states and 59 transitions. Second operand 14 states. [2018-12-01 19:14:35,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 19:14:35,006 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2018-12-01 19:14:35,007 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-12-01 19:14:35,007 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 76 [2018-12-01 19:14:35,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 19:14:35,008 INFO L225 Difference]: With dead ends: 53 [2018-12-01 19:14:35,008 INFO L226 Difference]: Without dead ends: 49 [2018-12-01 19:14:35,008 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2018-12-01 19:14:35,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-12-01 19:14:35,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-12-01 19:14:35,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-12-01 19:14:35,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 63 transitions. [2018-12-01 19:14:35,019 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 63 transitions. Word has length 76 [2018-12-01 19:14:35,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 19:14:35,019 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 63 transitions. [2018-12-01 19:14:35,019 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-12-01 19:14:35,019 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 63 transitions. [2018-12-01 19:14:35,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-12-01 19:14:35,020 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 19:14:35,020 INFO L402 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 19:14:35,020 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 19:14:35,020 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 19:14:35,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1057728309, now seen corresponding path program 10 times [2018-12-01 19:14:35,020 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 19:14:35,021 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 19:14:35,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:14:35,021 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 19:14:35,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:14:35,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:14:35,107 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2018-12-01 19:14:35,107 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 19:14:35,107 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/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 [2018-12-01 19:14:35,113 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-01 19:14:35,127 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-01 19:14:35,128 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 19:14:35,129 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 19:14:35,145 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2018-12-01 19:14:35,169 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 19:14:35,170 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-12-01 19:14:35,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-12-01 19:14:35,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-12-01 19:14:35,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2018-12-01 19:14:35,170 INFO L87 Difference]: Start difference. First operand 49 states and 63 transitions. Second operand 15 states. [2018-12-01 19:14:35,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 19:14:35,294 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2018-12-01 19:14:35,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-12-01 19:14:35,294 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 83 [2018-12-01 19:14:35,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 19:14:35,295 INFO L225 Difference]: With dead ends: 56 [2018-12-01 19:14:35,295 INFO L226 Difference]: Without dead ends: 52 [2018-12-01 19:14:35,296 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=236, Invalid=414, Unknown=0, NotChecked=0, Total=650 [2018-12-01 19:14:35,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-12-01 19:14:35,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-12-01 19:14:35,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-12-01 19:14:35,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 67 transitions. [2018-12-01 19:14:35,300 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 67 transitions. Word has length 83 [2018-12-01 19:14:35,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 19:14:35,300 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 67 transitions. [2018-12-01 19:14:35,300 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-12-01 19:14:35,300 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 67 transitions. [2018-12-01 19:14:35,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-12-01 19:14:35,300 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 19:14:35,300 INFO L402 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 19:14:35,301 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 19:14:35,301 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 19:14:35,301 INFO L82 PathProgramCache]: Analyzing trace with hash -2104461250, now seen corresponding path program 11 times [2018-12-01 19:14:35,301 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 19:14:35,301 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 19:14:35,301 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:14:35,301 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 19:14:35,301 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:14:35,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:14:35,393 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2018-12-01 19:14:35,393 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 19:14:35,393 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/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 [2018-12-01 19:14:35,399 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-01 19:14:35,421 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-12-01 19:14:35,421 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 19:14:35,424 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 19:14:35,444 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2018-12-01 19:14:35,459 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 19:14:35,459 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-12-01 19:14:35,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-12-01 19:14:35,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-12-01 19:14:35,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2018-12-01 19:14:35,460 INFO L87 Difference]: Start difference. First operand 52 states and 67 transitions. Second operand 16 states. [2018-12-01 19:14:35,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 19:14:35,627 INFO L93 Difference]: Finished difference Result 59 states and 75 transitions. [2018-12-01 19:14:35,627 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-12-01 19:14:35,627 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 90 [2018-12-01 19:14:35,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 19:14:35,628 INFO L225 Difference]: With dead ends: 59 [2018-12-01 19:14:35,628 INFO L226 Difference]: Without dead ends: 55 [2018-12-01 19:14:35,628 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=275, Invalid=481, Unknown=0, NotChecked=0, Total=756 [2018-12-01 19:14:35,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-12-01 19:14:35,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-12-01 19:14:35,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-12-01 19:14:35,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 71 transitions. [2018-12-01 19:14:35,632 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 71 transitions. Word has length 90 [2018-12-01 19:14:35,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 19:14:35,633 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 71 transitions. [2018-12-01 19:14:35,633 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-12-01 19:14:35,633 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 71 transitions. [2018-12-01 19:14:35,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-12-01 19:14:35,634 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 19:14:35,634 INFO L402 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 19:14:35,634 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 19:14:35,634 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 19:14:35,634 INFO L82 PathProgramCache]: Analyzing trace with hash 565979361, now seen corresponding path program 12 times [2018-12-01 19:14:35,634 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 19:14:35,634 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 19:14:35,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:14:35,635 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 19:14:35,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:14:35,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:14:35,734 INFO L134 CoverageAnalysis]: Checked inductivity of 510 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2018-12-01 19:14:35,734 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 19:14:35,734 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/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 [2018-12-01 19:14:35,740 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-01 19:14:35,765 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-12-01 19:14:35,766 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 19:14:35,768 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 19:14:35,786 INFO L134 CoverageAnalysis]: Checked inductivity of 510 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2018-12-01 19:14:35,809 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 19:14:35,809 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-12-01 19:14:35,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-12-01 19:14:35,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-12-01 19:14:35,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2018-12-01 19:14:35,810 INFO L87 Difference]: Start difference. First operand 55 states and 71 transitions. Second operand 17 states. [2018-12-01 19:14:35,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 19:14:35,988 INFO L93 Difference]: Finished difference Result 62 states and 79 transitions. [2018-12-01 19:14:35,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-12-01 19:14:35,988 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 97 [2018-12-01 19:14:35,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 19:14:35,989 INFO L225 Difference]: With dead ends: 62 [2018-12-01 19:14:35,989 INFO L226 Difference]: Without dead ends: 58 [2018-12-01 19:14:35,989 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=317, Invalid=553, Unknown=0, NotChecked=0, Total=870 [2018-12-01 19:14:35,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-12-01 19:14:35,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-12-01 19:14:35,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-12-01 19:14:35,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 75 transitions. [2018-12-01 19:14:35,993 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 75 transitions. Word has length 97 [2018-12-01 19:14:35,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 19:14:35,993 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 75 transitions. [2018-12-01 19:14:35,993 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-12-01 19:14:35,993 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 75 transitions. [2018-12-01 19:14:35,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-12-01 19:14:35,994 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 19:14:35,994 INFO L402 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 19:14:35,994 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 19:14:35,994 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 19:14:35,994 INFO L82 PathProgramCache]: Analyzing trace with hash -106117208, now seen corresponding path program 13 times [2018-12-01 19:14:35,994 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 19:14:35,994 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 19:14:35,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:14:35,995 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 19:14:35,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:14:36,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:14:36,094 INFO L134 CoverageAnalysis]: Checked inductivity of 598 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2018-12-01 19:14:36,094 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 19:14:36,094 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/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 [2018-12-01 19:14:36,100 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 19:14:36,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:14:36,119 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 19:14:36,140 INFO L134 CoverageAnalysis]: Checked inductivity of 598 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2018-12-01 19:14:36,156 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 19:14:36,156 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-12-01 19:14:36,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-12-01 19:14:36,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-12-01 19:14:36,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2018-12-01 19:14:36,157 INFO L87 Difference]: Start difference. First operand 58 states and 75 transitions. Second operand 18 states. [2018-12-01 19:14:36,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 19:14:36,319 INFO L93 Difference]: Finished difference Result 65 states and 83 transitions. [2018-12-01 19:14:36,319 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-12-01 19:14:36,319 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 104 [2018-12-01 19:14:36,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 19:14:36,320 INFO L225 Difference]: With dead ends: 65 [2018-12-01 19:14:36,320 INFO L226 Difference]: Without dead ends: 61 [2018-12-01 19:14:36,321 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=362, Invalid=630, Unknown=0, NotChecked=0, Total=992 [2018-12-01 19:14:36,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-12-01 19:14:36,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-12-01 19:14:36,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-12-01 19:14:36,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 79 transitions. [2018-12-01 19:14:36,324 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 79 transitions. Word has length 104 [2018-12-01 19:14:36,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 19:14:36,324 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 79 transitions. [2018-12-01 19:14:36,325 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-12-01 19:14:36,325 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 79 transitions. [2018-12-01 19:14:36,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-12-01 19:14:36,325 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 19:14:36,325 INFO L402 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 19:14:36,325 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 19:14:36,325 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 19:14:36,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1237836279, now seen corresponding path program 14 times [2018-12-01 19:14:36,325 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 19:14:36,326 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 19:14:36,326 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:14:36,326 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 19:14:36,326 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:14:36,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:14:36,458 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2018-12-01 19:14:36,459 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 19:14:36,459 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/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 [2018-12-01 19:14:36,465 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-01 19:14:36,487 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-01 19:14:36,487 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 19:14:36,490 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 19:14:36,504 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2018-12-01 19:14:36,520 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 19:14:36,520 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-12-01 19:14:36,520 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-12-01 19:14:36,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-12-01 19:14:36,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2018-12-01 19:14:36,520 INFO L87 Difference]: Start difference. First operand 61 states and 79 transitions. Second operand 19 states. [2018-12-01 19:14:36,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 19:14:36,691 INFO L93 Difference]: Finished difference Result 68 states and 87 transitions. [2018-12-01 19:14:36,691 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-12-01 19:14:36,691 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 111 [2018-12-01 19:14:36,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 19:14:36,692 INFO L225 Difference]: With dead ends: 68 [2018-12-01 19:14:36,692 INFO L226 Difference]: Without dead ends: 64 [2018-12-01 19:14:36,693 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=410, Invalid=712, Unknown=0, NotChecked=0, Total=1122 [2018-12-01 19:14:36,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-12-01 19:14:36,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-12-01 19:14:36,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-12-01 19:14:36,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 83 transitions. [2018-12-01 19:14:36,699 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 83 transitions. Word has length 111 [2018-12-01 19:14:36,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 19:14:36,699 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 83 transitions. [2018-12-01 19:14:36,699 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-12-01 19:14:36,699 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 83 transitions. [2018-12-01 19:14:36,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-12-01 19:14:36,700 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 19:14:36,700 INFO L402 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 19:14:36,700 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 19:14:36,700 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 19:14:36,700 INFO L82 PathProgramCache]: Analyzing trace with hash 340319762, now seen corresponding path program 15 times [2018-12-01 19:14:36,701 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 19:14:36,701 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 19:14:36,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:14:36,701 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 19:14:36,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:14:36,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:14:36,858 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2018-12-01 19:14:36,858 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 19:14:36,858 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/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 [2018-12-01 19:14:36,864 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-01 19:14:36,898 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-12-01 19:14:36,898 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 19:14:36,901 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 19:14:36,923 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2018-12-01 19:14:36,938 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 19:14:36,938 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-12-01 19:14:36,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-12-01 19:14:36,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-12-01 19:14:36,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=223, Unknown=0, NotChecked=0, Total=380 [2018-12-01 19:14:36,939 INFO L87 Difference]: Start difference. First operand 64 states and 83 transitions. Second operand 20 states. [2018-12-01 19:14:37,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 19:14:37,118 INFO L93 Difference]: Finished difference Result 71 states and 91 transitions. [2018-12-01 19:14:37,118 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-12-01 19:14:37,119 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 118 [2018-12-01 19:14:37,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 19:14:37,119 INFO L225 Difference]: With dead ends: 71 [2018-12-01 19:14:37,119 INFO L226 Difference]: Without dead ends: 67 [2018-12-01 19:14:37,120 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=461, Invalid=799, Unknown=0, NotChecked=0, Total=1260 [2018-12-01 19:14:37,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-12-01 19:14:37,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-12-01 19:14:37,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-12-01 19:14:37,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 87 transitions. [2018-12-01 19:14:37,123 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 87 transitions. Word has length 118 [2018-12-01 19:14:37,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 19:14:37,123 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 87 transitions. [2018-12-01 19:14:37,123 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-12-01 19:14:37,123 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 87 transitions. [2018-12-01 19:14:37,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-12-01 19:14:37,124 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 19:14:37,124 INFO L402 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 19:14:37,124 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 19:14:37,124 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 19:14:37,124 INFO L82 PathProgramCache]: Analyzing trace with hash 1471685645, now seen corresponding path program 16 times [2018-12-01 19:14:37,124 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 19:14:37,124 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 19:14:37,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:14:37,125 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 19:14:37,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:14:37,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:14:37,252 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 512 trivial. 0 not checked. [2018-12-01 19:14:37,252 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 19:14:37,252 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/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 [2018-12-01 19:14:37,258 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-01 19:14:37,278 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-01 19:14:37,278 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 19:14:37,280 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 19:14:37,294 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 512 trivial. 0 not checked. [2018-12-01 19:14:37,309 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 19:14:37,309 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-12-01 19:14:37,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-12-01 19:14:37,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-12-01 19:14:37,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=245, Unknown=0, NotChecked=0, Total=420 [2018-12-01 19:14:37,310 INFO L87 Difference]: Start difference. First operand 67 states and 87 transitions. Second operand 21 states. [2018-12-01 19:14:37,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 19:14:37,520 INFO L93 Difference]: Finished difference Result 74 states and 95 transitions. [2018-12-01 19:14:37,520 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-12-01 19:14:37,520 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 125 [2018-12-01 19:14:37,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 19:14:37,521 INFO L225 Difference]: With dead ends: 74 [2018-12-01 19:14:37,521 INFO L226 Difference]: Without dead ends: 70 [2018-12-01 19:14:37,521 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=515, Invalid=891, Unknown=0, NotChecked=0, Total=1406 [2018-12-01 19:14:37,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-12-01 19:14:37,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-12-01 19:14:37,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-12-01 19:14:37,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 91 transitions. [2018-12-01 19:14:37,525 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 91 transitions. Word has length 125 [2018-12-01 19:14:37,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 19:14:37,526 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 91 transitions. [2018-12-01 19:14:37,526 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-12-01 19:14:37,526 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 91 transitions. [2018-12-01 19:14:37,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-12-01 19:14:37,526 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 19:14:37,526 INFO L402 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 19:14:37,526 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 19:14:37,527 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 19:14:37,527 INFO L82 PathProgramCache]: Analyzing trace with hash -1481368708, now seen corresponding path program 17 times [2018-12-01 19:14:37,527 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 19:14:37,527 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 19:14:37,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:14:37,527 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 19:14:37,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:14:37,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:14:37,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1020 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 578 trivial. 0 not checked. [2018-12-01 19:14:37,713 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 19:14:37,713 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/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 [2018-12-01 19:14:37,719 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-01 19:14:37,755 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-12-01 19:14:37,756 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 19:14:37,758 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 19:14:37,776 INFO L134 CoverageAnalysis]: Checked inductivity of 1020 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 578 trivial. 0 not checked. [2018-12-01 19:14:37,791 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 19:14:37,792 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-12-01 19:14:37,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-12-01 19:14:37,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-12-01 19:14:37,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=268, Unknown=0, NotChecked=0, Total=462 [2018-12-01 19:14:37,792 INFO L87 Difference]: Start difference. First operand 70 states and 91 transitions. Second operand 22 states. [2018-12-01 19:14:37,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 19:14:37,986 INFO L93 Difference]: Finished difference Result 77 states and 99 transitions. [2018-12-01 19:14:37,987 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-12-01 19:14:37,987 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 132 [2018-12-01 19:14:37,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 19:14:37,987 INFO L225 Difference]: With dead ends: 77 [2018-12-01 19:14:37,987 INFO L226 Difference]: Without dead ends: 73 [2018-12-01 19:14:37,988 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=572, Invalid=988, Unknown=0, NotChecked=0, Total=1560 [2018-12-01 19:14:37,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-12-01 19:14:37,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-12-01 19:14:37,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-12-01 19:14:37,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 95 transitions. [2018-12-01 19:14:37,991 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 95 transitions. Word has length 132 [2018-12-01 19:14:37,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 19:14:37,991 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 95 transitions. [2018-12-01 19:14:37,991 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-12-01 19:14:37,992 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 95 transitions. [2018-12-01 19:14:37,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2018-12-01 19:14:37,992 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 19:14:37,992 INFO L402 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 19:14:37,992 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 19:14:37,992 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 19:14:37,992 INFO L82 PathProgramCache]: Analyzing trace with hash -103968989, now seen corresponding path program 18 times [2018-12-01 19:14:37,992 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 19:14:37,993 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 19:14:37,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:14:37,993 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 19:14:37,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:14:37,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:14:38,175 INFO L134 CoverageAnalysis]: Checked inductivity of 1143 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2018-12-01 19:14:38,175 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 19:14:38,175 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/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 [2018-12-01 19:14:38,181 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-01 19:14:38,218 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-12-01 19:14:38,218 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 19:14:38,221 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 19:14:38,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1143 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2018-12-01 19:14:38,263 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 19:14:38,263 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-12-01 19:14:38,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-12-01 19:14:38,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-12-01 19:14:38,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=292, Unknown=0, NotChecked=0, Total=506 [2018-12-01 19:14:38,264 INFO L87 Difference]: Start difference. First operand 73 states and 95 transitions. Second operand 23 states. [2018-12-01 19:14:38,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 19:14:38,526 INFO L93 Difference]: Finished difference Result 80 states and 103 transitions. [2018-12-01 19:14:38,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-12-01 19:14:38,526 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 139 [2018-12-01 19:14:38,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 19:14:38,527 INFO L225 Difference]: With dead ends: 80 [2018-12-01 19:14:38,527 INFO L226 Difference]: Without dead ends: 76 [2018-12-01 19:14:38,528 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=632, Invalid=1090, Unknown=0, NotChecked=0, Total=1722 [2018-12-01 19:14:38,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-12-01 19:14:38,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-12-01 19:14:38,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-12-01 19:14:38,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 99 transitions. [2018-12-01 19:14:38,533 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 99 transitions. Word has length 139 [2018-12-01 19:14:38,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 19:14:38,533 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 99 transitions. [2018-12-01 19:14:38,533 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-12-01 19:14:38,533 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 99 transitions. [2018-12-01 19:14:38,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-12-01 19:14:38,534 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 19:14:38,534 INFO L402 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 19:14:38,534 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 19:14:38,535 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 19:14:38,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1432494106, now seen corresponding path program 19 times [2018-12-01 19:14:38,535 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 19:14:38,535 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 19:14:38,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:14:38,536 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 19:14:38,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:14:38,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:14:38,730 INFO L134 CoverageAnalysis]: Checked inductivity of 1273 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 722 trivial. 0 not checked. [2018-12-01 19:14:38,731 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 19:14:38,731 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/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 [2018-12-01 19:14:38,736 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 19:14:38,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:14:38,764 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 19:14:38,781 INFO L134 CoverageAnalysis]: Checked inductivity of 1273 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 722 trivial. 0 not checked. [2018-12-01 19:14:38,796 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 19:14:38,796 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-12-01 19:14:38,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-12-01 19:14:38,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-12-01 19:14:38,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=317, Unknown=0, NotChecked=0, Total=552 [2018-12-01 19:14:38,796 INFO L87 Difference]: Start difference. First operand 76 states and 99 transitions. Second operand 24 states. [2018-12-01 19:14:39,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 19:14:39,062 INFO L93 Difference]: Finished difference Result 83 states and 107 transitions. [2018-12-01 19:14:39,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-12-01 19:14:39,063 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 146 [2018-12-01 19:14:39,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 19:14:39,063 INFO L225 Difference]: With dead ends: 83 [2018-12-01 19:14:39,063 INFO L226 Difference]: Without dead ends: 79 [2018-12-01 19:14:39,064 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=695, Invalid=1197, Unknown=0, NotChecked=0, Total=1892 [2018-12-01 19:14:39,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-12-01 19:14:39,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-12-01 19:14:39,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-12-01 19:14:39,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 103 transitions. [2018-12-01 19:14:39,068 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 103 transitions. Word has length 146 [2018-12-01 19:14:39,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 19:14:39,068 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 103 transitions. [2018-12-01 19:14:39,068 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-12-01 19:14:39,069 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 103 transitions. [2018-12-01 19:14:39,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2018-12-01 19:14:39,069 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 19:14:39,070 INFO L402 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 19:14:39,070 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 19:14:39,070 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 19:14:39,070 INFO L82 PathProgramCache]: Analyzing trace with hash -873938119, now seen corresponding path program 20 times [2018-12-01 19:14:39,070 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 19:14:39,070 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 19:14:39,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:14:39,071 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 19:14:39,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:14:39,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:14:39,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1410 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2018-12-01 19:14:39,266 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 19:14:39,266 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/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 [2018-12-01 19:14:39,272 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-01 19:14:39,296 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-01 19:14:39,296 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 19:14:39,299 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 19:14:39,320 INFO L134 CoverageAnalysis]: Checked inductivity of 1410 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2018-12-01 19:14:39,334 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 19:14:39,335 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-12-01 19:14:39,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-12-01 19:14:39,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-12-01 19:14:39,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=343, Unknown=0, NotChecked=0, Total=600 [2018-12-01 19:14:39,335 INFO L87 Difference]: Start difference. First operand 79 states and 103 transitions. Second operand 25 states. [2018-12-01 19:14:39,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 19:14:39,631 INFO L93 Difference]: Finished difference Result 86 states and 111 transitions. [2018-12-01 19:14:39,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-12-01 19:14:39,631 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 153 [2018-12-01 19:14:39,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 19:14:39,632 INFO L225 Difference]: With dead ends: 86 [2018-12-01 19:14:39,632 INFO L226 Difference]: Without dead ends: 82 [2018-12-01 19:14:39,632 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=761, Invalid=1309, Unknown=0, NotChecked=0, Total=2070 [2018-12-01 19:14:39,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-12-01 19:14:39,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-12-01 19:14:39,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-12-01 19:14:39,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 107 transitions. [2018-12-01 19:14:39,636 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 107 transitions. Word has length 153 [2018-12-01 19:14:39,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 19:14:39,637 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 107 transitions. [2018-12-01 19:14:39,637 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-12-01 19:14:39,637 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 107 transitions. [2018-12-01 19:14:39,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-12-01 19:14:39,638 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 19:14:39,638 INFO L402 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 19:14:39,638 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 19:14:39,638 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 19:14:39,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1461029712, now seen corresponding path program 21 times [2018-12-01 19:14:39,638 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 19:14:39,638 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 19:14:39,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:14:39,639 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 19:14:39,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:14:39,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:14:39,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1554 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 882 trivial. 0 not checked. [2018-12-01 19:14:39,842 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 19:14:39,842 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/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 [2018-12-01 19:14:39,848 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-01 19:14:39,887 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-12-01 19:14:39,887 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 19:14:39,889 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 19:14:39,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1554 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 882 trivial. 0 not checked. [2018-12-01 19:14:39,935 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 19:14:39,935 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-12-01 19:14:39,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-12-01 19:14:39,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-12-01 19:14:39,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=370, Unknown=0, NotChecked=0, Total=650 [2018-12-01 19:14:39,936 INFO L87 Difference]: Start difference. First operand 82 states and 107 transitions. Second operand 26 states. [2018-12-01 19:14:40,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 19:14:40,214 INFO L93 Difference]: Finished difference Result 89 states and 115 transitions. [2018-12-01 19:14:40,214 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-12-01 19:14:40,214 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 160 [2018-12-01 19:14:40,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 19:14:40,215 INFO L225 Difference]: With dead ends: 89 [2018-12-01 19:14:40,215 INFO L226 Difference]: Without dead ends: 85 [2018-12-01 19:14:40,215 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=830, Invalid=1426, Unknown=0, NotChecked=0, Total=2256 [2018-12-01 19:14:40,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-12-01 19:14:40,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-12-01 19:14:40,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-12-01 19:14:40,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 111 transitions. [2018-12-01 19:14:40,219 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 111 transitions. Word has length 160 [2018-12-01 19:14:40,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 19:14:40,219 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 111 transitions. [2018-12-01 19:14:40,219 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-12-01 19:14:40,219 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 111 transitions. [2018-12-01 19:14:40,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2018-12-01 19:14:40,220 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 19:14:40,220 INFO L402 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 19:14:40,220 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 19:14:40,220 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 19:14:40,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1249222577, now seen corresponding path program 22 times [2018-12-01 19:14:40,220 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 19:14:40,220 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 19:14:40,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:14:40,221 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 19:14:40,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:14:40,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:14:40,428 INFO L134 CoverageAnalysis]: Checked inductivity of 1705 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 968 trivial. 0 not checked. [2018-12-01 19:14:40,428 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 19:14:40,428 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/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 [2018-12-01 19:14:40,437 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-01 19:14:40,467 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-01 19:14:40,467 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 19:14:40,470 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 19:14:40,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1705 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 968 trivial. 0 not checked. [2018-12-01 19:14:40,518 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 19:14:40,519 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-12-01 19:14:40,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-12-01 19:14:40,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-12-01 19:14:40,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=398, Unknown=0, NotChecked=0, Total=702 [2018-12-01 19:14:40,519 INFO L87 Difference]: Start difference. First operand 85 states and 111 transitions. Second operand 27 states. [2018-12-01 19:14:40,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 19:14:40,810 INFO L93 Difference]: Finished difference Result 92 states and 119 transitions. [2018-12-01 19:14:40,811 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-12-01 19:14:40,811 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 167 [2018-12-01 19:14:40,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 19:14:40,811 INFO L225 Difference]: With dead ends: 92 [2018-12-01 19:14:40,811 INFO L226 Difference]: Without dead ends: 88 [2018-12-01 19:14:40,812 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=902, Invalid=1548, Unknown=0, NotChecked=0, Total=2450 [2018-12-01 19:14:40,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-12-01 19:14:40,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-12-01 19:14:40,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-12-01 19:14:40,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 115 transitions. [2018-12-01 19:14:40,817 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 115 transitions. Word has length 167 [2018-12-01 19:14:40,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 19:14:40,817 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 115 transitions. [2018-12-01 19:14:40,817 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-12-01 19:14:40,817 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 115 transitions. [2018-12-01 19:14:40,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-12-01 19:14:40,818 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 19:14:40,818 INFO L402 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 19:14:40,819 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 19:14:40,819 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 19:14:40,819 INFO L82 PathProgramCache]: Analyzing trace with hash 1284144570, now seen corresponding path program 23 times [2018-12-01 19:14:40,819 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 19:14:40,819 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 19:14:40,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:14:40,820 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 19:14:40,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:14:40,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:14:41,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1863 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 1058 trivial. 0 not checked. [2018-12-01 19:14:41,051 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 19:14:41,051 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/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 [2018-12-01 19:14:41,057 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-01 19:14:41,104 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-12-01 19:14:41,104 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 19:14:41,108 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 19:14:41,130 INFO L134 CoverageAnalysis]: Checked inductivity of 1863 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 1058 trivial. 0 not checked. [2018-12-01 19:14:41,145 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 19:14:41,145 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-12-01 19:14:41,145 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-12-01 19:14:41,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-12-01 19:14:41,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=427, Unknown=0, NotChecked=0, Total=756 [2018-12-01 19:14:41,146 INFO L87 Difference]: Start difference. First operand 88 states and 115 transitions. Second operand 28 states. [2018-12-01 19:14:41,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 19:14:41,493 INFO L93 Difference]: Finished difference Result 95 states and 123 transitions. [2018-12-01 19:14:41,493 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-12-01 19:14:41,493 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 174 [2018-12-01 19:14:41,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 19:14:41,494 INFO L225 Difference]: With dead ends: 95 [2018-12-01 19:14:41,494 INFO L226 Difference]: Without dead ends: 91 [2018-12-01 19:14:41,494 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=977, Invalid=1675, Unknown=0, NotChecked=0, Total=2652 [2018-12-01 19:14:41,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-12-01 19:14:41,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-12-01 19:14:41,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-12-01 19:14:41,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 119 transitions. [2018-12-01 19:14:41,498 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 119 transitions. Word has length 174 [2018-12-01 19:14:41,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 19:14:41,498 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 119 transitions. [2018-12-01 19:14:41,498 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-12-01 19:14:41,498 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 119 transitions. [2018-12-01 19:14:41,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2018-12-01 19:14:41,499 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 19:14:41,499 INFO L402 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 19:14:41,499 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 19:14:41,499 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 19:14:41,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1205012069, now seen corresponding path program 24 times [2018-12-01 19:14:41,499 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 19:14:41,499 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 19:14:41,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:14:41,500 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 19:14:41,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:14:41,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:14:41,703 INFO L134 CoverageAnalysis]: Checked inductivity of 2028 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 1152 trivial. 0 not checked. [2018-12-01 19:14:41,703 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 19:14:41,703 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/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 [2018-12-01 19:14:41,709 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-01 19:14:41,755 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-12-01 19:14:41,755 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 19:14:41,758 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 19:14:41,792 INFO L134 CoverageAnalysis]: Checked inductivity of 2028 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 1152 trivial. 0 not checked. [2018-12-01 19:14:41,807 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 19:14:41,807 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-12-01 19:14:41,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-12-01 19:14:41,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-12-01 19:14:41,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=457, Unknown=0, NotChecked=0, Total=812 [2018-12-01 19:14:41,808 INFO L87 Difference]: Start difference. First operand 91 states and 119 transitions. Second operand 29 states. [2018-12-01 19:14:42,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 19:14:42,141 INFO L93 Difference]: Finished difference Result 98 states and 127 transitions. [2018-12-01 19:14:42,142 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-12-01 19:14:42,142 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 181 [2018-12-01 19:14:42,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 19:14:42,142 INFO L225 Difference]: With dead ends: 98 [2018-12-01 19:14:42,142 INFO L226 Difference]: Without dead ends: 94 [2018-12-01 19:14:42,143 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=1055, Invalid=1807, Unknown=0, NotChecked=0, Total=2862 [2018-12-01 19:14:42,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-12-01 19:14:42,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-12-01 19:14:42,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-12-01 19:14:42,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 123 transitions. [2018-12-01 19:14:42,147 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 123 transitions. Word has length 181 [2018-12-01 19:14:42,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 19:14:42,148 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 123 transitions. [2018-12-01 19:14:42,148 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-12-01 19:14:42,148 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 123 transitions. [2018-12-01 19:14:42,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-12-01 19:14:42,148 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 19:14:42,148 INFO L402 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 19:14:42,148 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 19:14:42,149 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 19:14:42,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1312024796, now seen corresponding path program 25 times [2018-12-01 19:14:42,149 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 19:14:42,149 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 19:14:42,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:14:42,149 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 19:14:42,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:14:42,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:14:42,379 INFO L134 CoverageAnalysis]: Checked inductivity of 2200 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 1250 trivial. 0 not checked. [2018-12-01 19:14:42,379 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 19:14:42,379 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/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 [2018-12-01 19:14:42,385 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 19:14:42,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:14:42,415 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 19:14:42,439 INFO L134 CoverageAnalysis]: Checked inductivity of 2200 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 1250 trivial. 0 not checked. [2018-12-01 19:14:42,454 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 19:14:42,454 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-12-01 19:14:42,454 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-12-01 19:14:42,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-12-01 19:14:42,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=488, Unknown=0, NotChecked=0, Total=870 [2018-12-01 19:14:42,455 INFO L87 Difference]: Start difference. First operand 94 states and 123 transitions. Second operand 30 states. [2018-12-01 19:14:42,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 19:14:42,790 INFO L93 Difference]: Finished difference Result 101 states and 131 transitions. [2018-12-01 19:14:42,790 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-12-01 19:14:42,790 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 188 [2018-12-01 19:14:42,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 19:14:42,791 INFO L225 Difference]: With dead ends: 101 [2018-12-01 19:14:42,791 INFO L226 Difference]: Without dead ends: 97 [2018-12-01 19:14:42,792 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1136, Invalid=1944, Unknown=0, NotChecked=0, Total=3080 [2018-12-01 19:14:42,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-12-01 19:14:42,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-12-01 19:14:42,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-12-01 19:14:42,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 127 transitions. [2018-12-01 19:14:42,796 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 127 transitions. Word has length 188 [2018-12-01 19:14:42,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 19:14:42,796 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 127 transitions. [2018-12-01 19:14:42,796 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-12-01 19:14:42,796 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 127 transitions. [2018-12-01 19:14:42,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2018-12-01 19:14:42,797 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 19:14:42,797 INFO L402 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 19:14:42,797 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 19:14:42,797 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 19:14:42,797 INFO L82 PathProgramCache]: Analyzing trace with hash 461591931, now seen corresponding path program 26 times [2018-12-01 19:14:42,797 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 19:14:42,798 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 19:14:42,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:14:42,798 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 19:14:42,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:14:42,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:14:43,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2379 backedges. 0 proven. 1027 refuted. 0 times theorem prover too weak. 1352 trivial. 0 not checked. [2018-12-01 19:14:43,031 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 19:14:43,031 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/bin-2019/uautomizer/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 19:14:43,037 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-01 19:14:43,068 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-01 19:14:43,068 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 19:14:43,071 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 19:14:43,096 INFO L134 CoverageAnalysis]: Checked inductivity of 2379 backedges. 0 proven. 1027 refuted. 0 times theorem prover too weak. 1352 trivial. 0 not checked. [2018-12-01 19:14:43,112 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 19:14:43,112 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-12-01 19:14:43,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-12-01 19:14:43,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-12-01 19:14:43,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=410, Invalid=520, Unknown=0, NotChecked=0, Total=930 [2018-12-01 19:14:43,113 INFO L87 Difference]: Start difference. First operand 97 states and 127 transitions. Second operand 31 states. [2018-12-01 19:14:43,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 19:14:43,496 INFO L93 Difference]: Finished difference Result 104 states and 135 transitions. [2018-12-01 19:14:43,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-12-01 19:14:43,496 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 195 [2018-12-01 19:14:43,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 19:14:43,497 INFO L225 Difference]: With dead ends: 104 [2018-12-01 19:14:43,497 INFO L226 Difference]: Without dead ends: 100 [2018-12-01 19:14:43,498 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1220, Invalid=2086, Unknown=0, NotChecked=0, Total=3306 [2018-12-01 19:14:43,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-12-01 19:14:43,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-12-01 19:14:43,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-12-01 19:14:43,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 131 transitions. [2018-12-01 19:14:43,503 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 131 transitions. Word has length 195 [2018-12-01 19:14:43,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 19:14:43,503 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 131 transitions. [2018-12-01 19:14:43,503 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-12-01 19:14:43,503 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 131 transitions. [2018-12-01 19:14:43,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-12-01 19:14:43,504 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 19:14:43,504 INFO L402 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 19:14:43,505 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 19:14:43,505 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 19:14:43,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1460254606, now seen corresponding path program 27 times [2018-12-01 19:14:43,505 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 19:14:43,505 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 19:14:43,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:14:43,506 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 19:14:43,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:14:43,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:14:43,798 INFO L134 CoverageAnalysis]: Checked inductivity of 2565 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 1458 trivial. 0 not checked. [2018-12-01 19:14:43,799 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 19:14:43,799 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/bin-2019/uautomizer/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 19:14:43,805 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-01 19:14:43,865 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-12-01 19:14:43,865 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 19:14:43,869 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 19:14:43,896 INFO L134 CoverageAnalysis]: Checked inductivity of 2565 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 1458 trivial. 0 not checked. [2018-12-01 19:14:43,911 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 19:14:43,911 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-12-01 19:14:43,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-12-01 19:14:43,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-12-01 19:14:43,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=439, Invalid=553, Unknown=0, NotChecked=0, Total=992 [2018-12-01 19:14:43,912 INFO L87 Difference]: Start difference. First operand 100 states and 131 transitions. Second operand 32 states. [2018-12-01 19:14:44,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 19:14:44,294 INFO L93 Difference]: Finished difference Result 107 states and 139 transitions. [2018-12-01 19:14:44,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-12-01 19:14:44,294 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 202 [2018-12-01 19:14:44,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 19:14:44,295 INFO L225 Difference]: With dead ends: 107 [2018-12-01 19:14:44,296 INFO L226 Difference]: Without dead ends: 103 [2018-12-01 19:14:44,296 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1307, Invalid=2233, Unknown=0, NotChecked=0, Total=3540 [2018-12-01 19:14:44,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-12-01 19:14:44,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-12-01 19:14:44,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-12-01 19:14:44,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 135 transitions. [2018-12-01 19:14:44,301 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 135 transitions. Word has length 202 [2018-12-01 19:14:44,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 19:14:44,302 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 135 transitions. [2018-12-01 19:14:44,302 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-12-01 19:14:44,302 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 135 transitions. [2018-12-01 19:14:44,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2018-12-01 19:14:44,303 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 19:14:44,303 INFO L402 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 19:14:44,303 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 19:14:44,303 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 19:14:44,304 INFO L82 PathProgramCache]: Analyzing trace with hash 788262289, now seen corresponding path program 28 times [2018-12-01 19:14:44,304 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 19:14:44,304 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 19:14:44,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:14:44,304 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 19:14:44,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:14:44,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:14:44,595 INFO L134 CoverageAnalysis]: Checked inductivity of 2758 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 1568 trivial. 0 not checked. [2018-12-01 19:14:44,595 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 19:14:44,595 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/bin-2019/uautomizer/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 19:14:44,600 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-01 19:14:44,632 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-01 19:14:44,633 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 19:14:44,636 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 19:14:44,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2758 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 1568 trivial. 0 not checked. [2018-12-01 19:14:44,690 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 19:14:44,691 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-12-01 19:14:44,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-12-01 19:14:44,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-12-01 19:14:44,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=469, Invalid=587, Unknown=0, NotChecked=0, Total=1056 [2018-12-01 19:14:44,691 INFO L87 Difference]: Start difference. First operand 103 states and 135 transitions. Second operand 33 states. [2018-12-01 19:14:45,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 19:14:45,117 INFO L93 Difference]: Finished difference Result 110 states and 143 transitions. [2018-12-01 19:14:45,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-12-01 19:14:45,117 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 209 [2018-12-01 19:14:45,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 19:14:45,118 INFO L225 Difference]: With dead ends: 110 [2018-12-01 19:14:45,118 INFO L226 Difference]: Without dead ends: 106 [2018-12-01 19:14:45,119 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1397, Invalid=2385, Unknown=0, NotChecked=0, Total=3782 [2018-12-01 19:14:45,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-12-01 19:14:45,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-12-01 19:14:45,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-12-01 19:14:45,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 139 transitions. [2018-12-01 19:14:45,123 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 139 transitions. Word has length 209 [2018-12-01 19:14:45,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 19:14:45,124 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 139 transitions. [2018-12-01 19:14:45,124 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-12-01 19:14:45,124 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 139 transitions. [2018-12-01 19:14:45,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2018-12-01 19:14:45,124 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 19:14:45,124 INFO L402 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 19:14:45,124 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 19:14:45,125 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 19:14:45,125 INFO L82 PathProgramCache]: Analyzing trace with hash -674054408, now seen corresponding path program 29 times [2018-12-01 19:14:45,125 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 19:14:45,125 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 19:14:45,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:14:45,125 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 19:14:45,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:14:45,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:14:45,418 INFO L134 CoverageAnalysis]: Checked inductivity of 2958 backedges. 0 proven. 1276 refuted. 0 times theorem prover too weak. 1682 trivial. 0 not checked. [2018-12-01 19:14:45,419 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 19:14:45,419 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/bin-2019/uautomizer/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 19:14:45,430 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-01 19:14:45,492 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-12-01 19:14:45,492 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 19:14:45,496 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 19:14:45,525 INFO L134 CoverageAnalysis]: Checked inductivity of 2958 backedges. 0 proven. 1276 refuted. 0 times theorem prover too weak. 1682 trivial. 0 not checked. [2018-12-01 19:14:45,540 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 19:14:45,540 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-12-01 19:14:45,541 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-12-01 19:14:45,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-12-01 19:14:45,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=500, Invalid=622, Unknown=0, NotChecked=0, Total=1122 [2018-12-01 19:14:45,541 INFO L87 Difference]: Start difference. First operand 106 states and 139 transitions. Second operand 34 states. [2018-12-01 19:14:45,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 19:14:45,977 INFO L93 Difference]: Finished difference Result 113 states and 147 transitions. [2018-12-01 19:14:45,977 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-12-01 19:14:45,977 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 216 [2018-12-01 19:14:45,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 19:14:45,977 INFO L225 Difference]: With dead ends: 113 [2018-12-01 19:14:45,978 INFO L226 Difference]: Without dead ends: 109 [2018-12-01 19:14:45,978 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1490, Invalid=2542, Unknown=0, NotChecked=0, Total=4032 [2018-12-01 19:14:45,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-12-01 19:14:45,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-12-01 19:14:45,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-12-01 19:14:45,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 143 transitions. [2018-12-01 19:14:45,983 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 143 transitions. Word has length 216 [2018-12-01 19:14:45,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 19:14:45,984 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 143 transitions. [2018-12-01 19:14:45,984 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-12-01 19:14:45,984 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 143 transitions. [2018-12-01 19:14:45,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2018-12-01 19:14:45,984 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 19:14:45,984 INFO L402 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 19:14:45,984 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 19:14:45,984 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 19:14:45,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1144876711, now seen corresponding path program 30 times [2018-12-01 19:14:45,985 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 19:14:45,985 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 19:14:45,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:14:45,985 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 19:14:45,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:14:45,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:14:46,324 INFO L134 CoverageAnalysis]: Checked inductivity of 3165 backedges. 0 proven. 1365 refuted. 0 times theorem prover too weak. 1800 trivial. 0 not checked. [2018-12-01 19:14:46,325 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 19:14:46,325 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/bin-2019/uautomizer/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 19:14:46,331 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-01 19:14:46,391 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-12-01 19:14:46,391 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 19:14:46,395 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 19:14:46,426 INFO L134 CoverageAnalysis]: Checked inductivity of 3165 backedges. 0 proven. 1365 refuted. 0 times theorem prover too weak. 1800 trivial. 0 not checked. [2018-12-01 19:14:46,440 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 19:14:46,441 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-12-01 19:14:46,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-12-01 19:14:46,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-12-01 19:14:46,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=532, Invalid=658, Unknown=0, NotChecked=0, Total=1190 [2018-12-01 19:14:46,442 INFO L87 Difference]: Start difference. First operand 109 states and 143 transitions. Second operand 35 states. [2018-12-01 19:14:46,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 19:14:46,895 INFO L93 Difference]: Finished difference Result 116 states and 151 transitions. [2018-12-01 19:14:46,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-12-01 19:14:46,895 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 223 [2018-12-01 19:14:46,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 19:14:46,896 INFO L225 Difference]: With dead ends: 116 [2018-12-01 19:14:46,896 INFO L226 Difference]: Without dead ends: 112 [2018-12-01 19:14:46,896 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1586, Invalid=2704, Unknown=0, NotChecked=0, Total=4290 [2018-12-01 19:14:46,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-12-01 19:14:46,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2018-12-01 19:14:46,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-12-01 19:14:46,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 147 transitions. [2018-12-01 19:14:46,902 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 147 transitions. Word has length 223 [2018-12-01 19:14:46,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 19:14:46,902 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 147 transitions. [2018-12-01 19:14:46,902 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-12-01 19:14:46,902 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 147 transitions. [2018-12-01 19:14:46,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2018-12-01 19:14:46,902 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 19:14:46,903 INFO L402 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 19:14:46,903 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 19:14:46,903 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 19:14:46,903 INFO L82 PathProgramCache]: Analyzing trace with hash -1122595486, now seen corresponding path program 31 times [2018-12-01 19:14:46,903 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 19:14:46,903 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 19:14:46,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:14:46,903 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 19:14:46,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:14:46,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:14:47,201 INFO L134 CoverageAnalysis]: Checked inductivity of 3379 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 1922 trivial. 0 not checked. [2018-12-01 19:14:47,201 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 19:14:47,201 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/bin-2019/uautomizer/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 19:14:47,207 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 19:14:47,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:14:47,244 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 19:14:47,291 INFO L134 CoverageAnalysis]: Checked inductivity of 3379 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 1922 trivial. 0 not checked. [2018-12-01 19:14:47,306 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 19:14:47,306 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-12-01 19:14:47,306 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-12-01 19:14:47,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-12-01 19:14:47,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=565, Invalid=695, Unknown=0, NotChecked=0, Total=1260 [2018-12-01 19:14:47,307 INFO L87 Difference]: Start difference. First operand 112 states and 147 transitions. Second operand 36 states. [2018-12-01 19:14:47,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 19:14:47,811 INFO L93 Difference]: Finished difference Result 119 states and 155 transitions. [2018-12-01 19:14:47,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-12-01 19:14:47,812 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 230 [2018-12-01 19:14:47,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 19:14:47,813 INFO L225 Difference]: With dead ends: 119 [2018-12-01 19:14:47,813 INFO L226 Difference]: Without dead ends: 115 [2018-12-01 19:14:47,813 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1685, Invalid=2871, Unknown=0, NotChecked=0, Total=4556 [2018-12-01 19:14:47,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-12-01 19:14:47,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-12-01 19:14:47,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-12-01 19:14:47,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 151 transitions. [2018-12-01 19:14:47,820 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 151 transitions. Word has length 230 [2018-12-01 19:14:47,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 19:14:47,820 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 151 transitions. [2018-12-01 19:14:47,820 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-12-01 19:14:47,820 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 151 transitions. [2018-12-01 19:14:47,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2018-12-01 19:14:47,821 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 19:14:47,821 INFO L402 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 19:14:47,821 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 19:14:47,822 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 19:14:47,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1055422653, now seen corresponding path program 32 times [2018-12-01 19:14:47,822 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 19:14:47,822 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 19:14:47,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:14:47,822 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 19:14:47,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:14:47,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:14:48,162 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 0 proven. 1552 refuted. 0 times theorem prover too weak. 2048 trivial. 0 not checked. [2018-12-01 19:14:48,162 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 19:14:48,162 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/bin-2019/uautomizer/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 19:14:48,168 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-01 19:14:48,204 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-01 19:14:48,204 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 19:14:48,207 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 19:14:48,244 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 0 proven. 1552 refuted. 0 times theorem prover too weak. 2048 trivial. 0 not checked. [2018-12-01 19:14:48,259 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 19:14:48,259 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-12-01 19:14:48,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-12-01 19:14:48,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-12-01 19:14:48,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=599, Invalid=733, Unknown=0, NotChecked=0, Total=1332 [2018-12-01 19:14:48,260 INFO L87 Difference]: Start difference. First operand 115 states and 151 transitions. Second operand 37 states. [2018-12-01 19:14:48,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 19:14:48,781 INFO L93 Difference]: Finished difference Result 122 states and 159 transitions. [2018-12-01 19:14:48,781 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-12-01 19:14:48,781 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 237 [2018-12-01 19:14:48,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 19:14:48,782 INFO L225 Difference]: With dead ends: 122 [2018-12-01 19:14:48,782 INFO L226 Difference]: Without dead ends: 118 [2018-12-01 19:14:48,783 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1787, Invalid=3043, Unknown=0, NotChecked=0, Total=4830 [2018-12-01 19:14:48,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-12-01 19:14:48,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2018-12-01 19:14:48,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-12-01 19:14:48,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 155 transitions. [2018-12-01 19:14:48,789 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 155 transitions. Word has length 237 [2018-12-01 19:14:48,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 19:14:48,789 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 155 transitions. [2018-12-01 19:14:48,789 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-12-01 19:14:48,789 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 155 transitions. [2018-12-01 19:14:48,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2018-12-01 19:14:48,790 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 19:14:48,790 INFO L402 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 19:14:48,791 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 19:14:48,791 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 19:14:48,791 INFO L82 PathProgramCache]: Analyzing trace with hash -1624997172, now seen corresponding path program 33 times [2018-12-01 19:14:48,791 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 19:14:48,791 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 19:14:48,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:14:48,792 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 19:14:48,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:14:48,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:14:49,157 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 1650 refuted. 0 times theorem prover too weak. 2178 trivial. 0 not checked. [2018-12-01 19:14:49,157 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 19:14:49,157 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/bin-2019/uautomizer/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 19:14:49,163 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-01 19:14:49,233 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-12-01 19:14:49,233 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 19:14:49,236 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 19:14:49,269 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 1650 refuted. 0 times theorem prover too weak. 2178 trivial. 0 not checked. [2018-12-01 19:14:49,284 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 19:14:49,284 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-12-01 19:14:49,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-12-01 19:14:49,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-12-01 19:14:49,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=634, Invalid=772, Unknown=0, NotChecked=0, Total=1406 [2018-12-01 19:14:49,285 INFO L87 Difference]: Start difference. First operand 118 states and 155 transitions. Second operand 38 states. [2018-12-01 19:14:49,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 19:14:49,789 INFO L93 Difference]: Finished difference Result 125 states and 163 transitions. [2018-12-01 19:14:49,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-12-01 19:14:49,790 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 244 [2018-12-01 19:14:49,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 19:14:49,790 INFO L225 Difference]: With dead ends: 125 [2018-12-01 19:14:49,790 INFO L226 Difference]: Without dead ends: 121 [2018-12-01 19:14:49,791 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1892, Invalid=3220, Unknown=0, NotChecked=0, Total=5112 [2018-12-01 19:14:49,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-12-01 19:14:49,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-12-01 19:14:49,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-12-01 19:14:49,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 159 transitions. [2018-12-01 19:14:49,797 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 159 transitions. Word has length 244 [2018-12-01 19:14:49,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 19:14:49,798 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 159 transitions. [2018-12-01 19:14:49,798 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-12-01 19:14:49,798 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 159 transitions. [2018-12-01 19:14:49,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2018-12-01 19:14:49,798 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 19:14:49,799 INFO L402 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 19:14:49,799 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 19:14:49,799 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 19:14:49,799 INFO L82 PathProgramCache]: Analyzing trace with hash -2109887533, now seen corresponding path program 34 times [2018-12-01 19:14:49,799 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 19:14:49,799 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 19:14:49,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:14:49,799 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 19:14:49,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:14:49,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:14:50,174 INFO L134 CoverageAnalysis]: Checked inductivity of 4063 backedges. 0 proven. 1751 refuted. 0 times theorem prover too weak. 2312 trivial. 0 not checked. [2018-12-01 19:14:50,174 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 19:14:50,174 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/bin-2019/uautomizer/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 19:14:50,180 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-01 19:14:50,221 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-01 19:14:50,221 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 19:14:50,225 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 19:14:50,259 INFO L134 CoverageAnalysis]: Checked inductivity of 4063 backedges. 0 proven. 1751 refuted. 0 times theorem prover too weak. 2312 trivial. 0 not checked. [2018-12-01 19:14:50,274 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 19:14:50,274 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-12-01 19:14:50,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-12-01 19:14:50,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-12-01 19:14:50,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=670, Invalid=812, Unknown=0, NotChecked=0, Total=1482 [2018-12-01 19:14:50,275 INFO L87 Difference]: Start difference. First operand 121 states and 159 transitions. Second operand 39 states. [2018-12-01 19:14:50,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 19:14:50,825 INFO L93 Difference]: Finished difference Result 128 states and 167 transitions. [2018-12-01 19:14:50,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-12-01 19:14:50,825 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 251 [2018-12-01 19:14:50,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 19:14:50,826 INFO L225 Difference]: With dead ends: 128 [2018-12-01 19:14:50,826 INFO L226 Difference]: Without dead ends: 124 [2018-12-01 19:14:50,826 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 286 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2000, Invalid=3402, Unknown=0, NotChecked=0, Total=5402 [2018-12-01 19:14:50,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2018-12-01 19:14:50,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2018-12-01 19:14:50,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-12-01 19:14:50,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 163 transitions. [2018-12-01 19:14:50,833 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 163 transitions. Word has length 251 [2018-12-01 19:14:50,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 19:14:50,834 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 163 transitions. [2018-12-01 19:14:50,834 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-12-01 19:14:50,834 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 163 transitions. [2018-12-01 19:14:50,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2018-12-01 19:14:50,834 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 19:14:50,835 INFO L402 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 19:14:50,835 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 19:14:50,835 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 19:14:50,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1202454326, now seen corresponding path program 35 times [2018-12-01 19:14:50,835 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 19:14:50,835 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 19:14:50,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:14:50,835 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 19:14:50,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:14:50,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:14:51,220 INFO L134 CoverageAnalysis]: Checked inductivity of 4305 backedges. 0 proven. 1855 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2018-12-01 19:14:51,221 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 19:14:51,221 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/bin-2019/uautomizer/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 19:14:51,227 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-01 19:14:51,311 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-12-01 19:14:51,311 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 19:14:51,316 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 19:14:51,351 INFO L134 CoverageAnalysis]: Checked inductivity of 4305 backedges. 0 proven. 1855 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2018-12-01 19:14:51,366 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 19:14:51,366 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-12-01 19:14:51,366 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-12-01 19:14:51,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-12-01 19:14:51,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=707, Invalid=853, Unknown=0, NotChecked=0, Total=1560 [2018-12-01 19:14:51,366 INFO L87 Difference]: Start difference. First operand 124 states and 163 transitions. Second operand 40 states. [2018-12-01 19:14:51,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 19:14:51,899 INFO L93 Difference]: Finished difference Result 131 states and 171 transitions. [2018-12-01 19:14:51,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-12-01 19:14:51,899 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 258 [2018-12-01 19:14:51,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 19:14:51,900 INFO L225 Difference]: With dead ends: 131 [2018-12-01 19:14:51,900 INFO L226 Difference]: Without dead ends: 127 [2018-12-01 19:14:51,901 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 294 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2111, Invalid=3589, Unknown=0, NotChecked=0, Total=5700 [2018-12-01 19:14:51,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-12-01 19:14:51,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2018-12-01 19:14:51,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-12-01 19:14:51,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 167 transitions. [2018-12-01 19:14:51,911 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 167 transitions. Word has length 258 [2018-12-01 19:14:51,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 19:14:51,912 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 167 transitions. [2018-12-01 19:14:51,912 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-12-01 19:14:51,912 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 167 transitions. [2018-12-01 19:14:51,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2018-12-01 19:14:51,913 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 19:14:51,913 INFO L402 BasicCegarLoop]: trace histogram [37, 37, 36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 19:14:51,914 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 19:14:51,914 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 19:14:51,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1327343593, now seen corresponding path program 36 times [2018-12-01 19:14:51,914 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 19:14:51,914 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 19:14:51,915 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:14:51,915 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 19:14:51,915 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:14:51,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:14:52,331 INFO L134 CoverageAnalysis]: Checked inductivity of 4554 backedges. 0 proven. 1962 refuted. 0 times theorem prover too weak. 2592 trivial. 0 not checked. [2018-12-01 19:14:52,331 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 19:14:52,331 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/bin-2019/uautomizer/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 19:14:52,342 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-01 19:14:52,424 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-12-01 19:14:52,424 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 19:14:52,428 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 19:14:52,478 INFO L134 CoverageAnalysis]: Checked inductivity of 4554 backedges. 0 proven. 1962 refuted. 0 times theorem prover too weak. 2592 trivial. 0 not checked. [2018-12-01 19:14:52,492 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 19:14:52,493 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-12-01 19:14:52,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-12-01 19:14:52,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-12-01 19:14:52,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=745, Invalid=895, Unknown=0, NotChecked=0, Total=1640 [2018-12-01 19:14:52,493 INFO L87 Difference]: Start difference. First operand 127 states and 167 transitions. Second operand 41 states. [2018-12-01 19:14:53,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 19:14:53,059 INFO L93 Difference]: Finished difference Result 134 states and 175 transitions. [2018-12-01 19:14:53,059 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-12-01 19:14:53,059 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 265 [2018-12-01 19:14:53,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 19:14:53,059 INFO L225 Difference]: With dead ends: 134 [2018-12-01 19:14:53,060 INFO L226 Difference]: Without dead ends: 130 [2018-12-01 19:14:53,060 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 302 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2225, Invalid=3781, Unknown=0, NotChecked=0, Total=6006 [2018-12-01 19:14:53,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-12-01 19:14:53,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2018-12-01 19:14:53,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-12-01 19:14:53,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 171 transitions. [2018-12-01 19:14:53,068 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 171 transitions. Word has length 265 [2018-12-01 19:14:53,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 19:14:53,068 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 171 transitions. [2018-12-01 19:14:53,068 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-12-01 19:14:53,068 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 171 transitions. [2018-12-01 19:14:53,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2018-12-01 19:14:53,069 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 19:14:53,069 INFO L402 BasicCegarLoop]: trace histogram [38, 38, 37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 19:14:53,069 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 19:14:53,069 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 19:14:53,069 INFO L82 PathProgramCache]: Analyzing trace with hash -742628704, now seen corresponding path program 37 times [2018-12-01 19:14:53,069 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 19:14:53,069 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 19:14:53,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:14:53,070 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 19:14:53,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:14:53,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:14:53,492 INFO L134 CoverageAnalysis]: Checked inductivity of 4810 backedges. 0 proven. 2072 refuted. 0 times theorem prover too weak. 2738 trivial. 0 not checked. [2018-12-01 19:14:53,492 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 19:14:53,492 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/bin-2019/uautomizer/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 19:14:53,498 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 19:14:53,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:14:53,543 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 19:14:53,587 INFO L134 CoverageAnalysis]: Checked inductivity of 4810 backedges. 0 proven. 2072 refuted. 0 times theorem prover too weak. 2738 trivial. 0 not checked. [2018-12-01 19:14:53,601 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 19:14:53,601 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-12-01 19:14:53,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-12-01 19:14:53,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-12-01 19:14:53,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=784, Invalid=938, Unknown=0, NotChecked=0, Total=1722 [2018-12-01 19:14:53,602 INFO L87 Difference]: Start difference. First operand 130 states and 171 transitions. Second operand 42 states. [2018-12-01 19:14:54,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 19:14:54,208 INFO L93 Difference]: Finished difference Result 137 states and 179 transitions. [2018-12-01 19:14:54,209 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-12-01 19:14:54,209 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 272 [2018-12-01 19:14:54,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 19:14:54,209 INFO L225 Difference]: With dead ends: 137 [2018-12-01 19:14:54,209 INFO L226 Difference]: Without dead ends: 133 [2018-12-01 19:14:54,210 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 310 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2342, Invalid=3978, Unknown=0, NotChecked=0, Total=6320 [2018-12-01 19:14:54,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-12-01 19:14:54,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-12-01 19:14:54,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-12-01 19:14:54,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 175 transitions. [2018-12-01 19:14:54,218 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 175 transitions. Word has length 272 [2018-12-01 19:14:54,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 19:14:54,218 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 175 transitions. [2018-12-01 19:14:54,218 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-12-01 19:14:54,218 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 175 transitions. [2018-12-01 19:14:54,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2018-12-01 19:14:54,219 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 19:14:54,219 INFO L402 BasicCegarLoop]: trace histogram [39, 39, 38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 19:14:54,219 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 19:14:54,219 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 19:14:54,220 INFO L82 PathProgramCache]: Analyzing trace with hash 571018495, now seen corresponding path program 38 times [2018-12-01 19:14:54,220 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 19:14:54,220 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 19:14:54,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:14:54,220 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 19:14:54,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:14:54,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:14:54,658 INFO L134 CoverageAnalysis]: Checked inductivity of 5073 backedges. 0 proven. 2185 refuted. 0 times theorem prover too weak. 2888 trivial. 0 not checked. [2018-12-01 19:14:54,658 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 19:14:54,658 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/bin-2019/uautomizer/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 19:14:54,664 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-01 19:14:54,705 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-01 19:14:54,705 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 19:14:54,709 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 19:14:54,772 INFO L134 CoverageAnalysis]: Checked inductivity of 5073 backedges. 0 proven. 2185 refuted. 0 times theorem prover too weak. 2888 trivial. 0 not checked. [2018-12-01 19:14:54,787 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 19:14:54,787 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-12-01 19:14:54,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-12-01 19:14:54,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-12-01 19:14:54,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=824, Invalid=982, Unknown=0, NotChecked=0, Total=1806 [2018-12-01 19:14:54,788 INFO L87 Difference]: Start difference. First operand 133 states and 175 transitions. Second operand 43 states. [2018-12-01 19:14:55,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 19:14:55,428 INFO L93 Difference]: Finished difference Result 140 states and 183 transitions. [2018-12-01 19:14:55,428 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-12-01 19:14:55,428 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 279 [2018-12-01 19:14:55,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 19:14:55,429 INFO L225 Difference]: With dead ends: 140 [2018-12-01 19:14:55,429 INFO L226 Difference]: Without dead ends: 136 [2018-12-01 19:14:55,430 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2462, Invalid=4180, Unknown=0, NotChecked=0, Total=6642 [2018-12-01 19:14:55,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2018-12-01 19:14:55,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2018-12-01 19:14:55,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-12-01 19:14:55,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 179 transitions. [2018-12-01 19:14:55,439 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 179 transitions. Word has length 279 [2018-12-01 19:14:55,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 19:14:55,439 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 179 transitions. [2018-12-01 19:14:55,440 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-12-01 19:14:55,440 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 179 transitions. [2018-12-01 19:14:55,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2018-12-01 19:14:55,441 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 19:14:55,441 INFO L402 BasicCegarLoop]: trace histogram [40, 40, 39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 19:14:55,441 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 19:14:55,441 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 19:14:55,441 INFO L82 PathProgramCache]: Analyzing trace with hash -708506358, now seen corresponding path program 39 times [2018-12-01 19:14:55,441 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 19:14:55,441 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 19:14:55,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:14:55,442 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 19:14:55,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:14:55,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:14:55,887 INFO L134 CoverageAnalysis]: Checked inductivity of 5343 backedges. 0 proven. 2301 refuted. 0 times theorem prover too weak. 3042 trivial. 0 not checked. [2018-12-01 19:14:55,887 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 19:14:55,887 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/bin-2019/uautomizer/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 19:14:55,893 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-01 19:14:55,982 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-12-01 19:14:55,982 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 19:14:55,986 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 19:14:56,032 INFO L134 CoverageAnalysis]: Checked inductivity of 5343 backedges. 0 proven. 2301 refuted. 0 times theorem prover too weak. 3042 trivial. 0 not checked. [2018-12-01 19:14:56,047 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 19:14:56,047 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-12-01 19:14:56,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-12-01 19:14:56,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-12-01 19:14:56,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=865, Invalid=1027, Unknown=0, NotChecked=0, Total=1892 [2018-12-01 19:14:56,048 INFO L87 Difference]: Start difference. First operand 136 states and 179 transitions. Second operand 44 states. [2018-12-01 19:14:56,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 19:14:56,714 INFO L93 Difference]: Finished difference Result 143 states and 187 transitions. [2018-12-01 19:14:56,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-12-01 19:14:56,714 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 286 [2018-12-01 19:14:56,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 19:14:56,715 INFO L225 Difference]: With dead ends: 143 [2018-12-01 19:14:56,715 INFO L226 Difference]: Without dead ends: 139 [2018-12-01 19:14:56,715 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2585, Invalid=4387, Unknown=0, NotChecked=0, Total=6972 [2018-12-01 19:14:56,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-12-01 19:14:56,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2018-12-01 19:14:56,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-12-01 19:14:56,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 183 transitions. [2018-12-01 19:14:56,729 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 183 transitions. Word has length 286 [2018-12-01 19:14:56,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 19:14:56,729 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 183 transitions. [2018-12-01 19:14:56,729 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-12-01 19:14:56,729 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 183 transitions. [2018-12-01 19:14:56,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2018-12-01 19:14:56,730 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 19:14:56,730 INFO L402 BasicCegarLoop]: trace histogram [41, 41, 40, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 19:14:56,730 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 19:14:56,730 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 19:14:56,731 INFO L82 PathProgramCache]: Analyzing trace with hash 287341333, now seen corresponding path program 40 times [2018-12-01 19:14:56,731 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 19:14:56,731 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 19:14:56,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:14:56,731 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 19:14:56,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:14:56,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:14:57,216 INFO L134 CoverageAnalysis]: Checked inductivity of 5620 backedges. 0 proven. 2420 refuted. 0 times theorem prover too weak. 3200 trivial. 0 not checked. [2018-12-01 19:14:57,216 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 19:14:57,216 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/bin-2019/uautomizer/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 19:14:57,223 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-01 19:14:57,269 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-01 19:14:57,270 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 19:14:57,274 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 19:14:57,329 INFO L134 CoverageAnalysis]: Checked inductivity of 5620 backedges. 0 proven. 2420 refuted. 0 times theorem prover too weak. 3200 trivial. 0 not checked. [2018-12-01 19:14:57,343 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 19:14:57,343 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-12-01 19:14:57,344 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-12-01 19:14:57,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-12-01 19:14:57,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=907, Invalid=1073, Unknown=0, NotChecked=0, Total=1980 [2018-12-01 19:14:57,344 INFO L87 Difference]: Start difference. First operand 139 states and 183 transitions. Second operand 45 states. [2018-12-01 19:14:58,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 19:14:58,043 INFO L93 Difference]: Finished difference Result 146 states and 191 transitions. [2018-12-01 19:14:58,043 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-12-01 19:14:58,043 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 293 [2018-12-01 19:14:58,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 19:14:58,044 INFO L225 Difference]: With dead ends: 146 [2018-12-01 19:14:58,044 INFO L226 Difference]: Without dead ends: 142 [2018-12-01 19:14:58,044 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2711, Invalid=4599, Unknown=0, NotChecked=0, Total=7310 [2018-12-01 19:14:58,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2018-12-01 19:14:58,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2018-12-01 19:14:58,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2018-12-01 19:14:58,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 187 transitions. [2018-12-01 19:14:58,053 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 187 transitions. Word has length 293 [2018-12-01 19:14:58,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 19:14:58,053 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 187 transitions. [2018-12-01 19:14:58,054 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-12-01 19:14:58,054 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 187 transitions. [2018-12-01 19:14:58,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2018-12-01 19:14:58,054 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 19:14:58,054 INFO L402 BasicCegarLoop]: trace histogram [42, 42, 41, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 19:14:58,055 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 19:14:58,055 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 19:14:58,055 INFO L82 PathProgramCache]: Analyzing trace with hash 2006277748, now seen corresponding path program 41 times [2018-12-01 19:14:58,055 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 19:14:58,055 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 19:14:58,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:14:58,055 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 19:14:58,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:14:58,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:14:58,552 INFO L134 CoverageAnalysis]: Checked inductivity of 5904 backedges. 0 proven. 2542 refuted. 0 times theorem prover too weak. 3362 trivial. 0 not checked. [2018-12-01 19:14:58,552 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 19:14:58,552 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/bin-2019/uautomizer/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 19:14:58,558 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-01 19:14:58,659 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-12-01 19:14:58,659 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 19:14:58,664 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 19:14:58,716 INFO L134 CoverageAnalysis]: Checked inductivity of 5904 backedges. 0 proven. 2542 refuted. 0 times theorem prover too weak. 3362 trivial. 0 not checked. [2018-12-01 19:14:58,730 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 19:14:58,730 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-12-01 19:14:58,730 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-12-01 19:14:58,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-12-01 19:14:58,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=950, Invalid=1120, Unknown=0, NotChecked=0, Total=2070 [2018-12-01 19:14:58,731 INFO L87 Difference]: Start difference. First operand 142 states and 187 transitions. Second operand 46 states. [2018-12-01 19:14:59,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 19:14:59,460 INFO L93 Difference]: Finished difference Result 149 states and 195 transitions. [2018-12-01 19:14:59,460 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-12-01 19:14:59,460 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 300 [2018-12-01 19:14:59,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 19:14:59,461 INFO L225 Difference]: With dead ends: 149 [2018-12-01 19:14:59,461 INFO L226 Difference]: Without dead ends: 145 [2018-12-01 19:14:59,462 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 342 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2840, Invalid=4816, Unknown=0, NotChecked=0, Total=7656 [2018-12-01 19:14:59,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-12-01 19:14:59,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2018-12-01 19:14:59,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-12-01 19:14:59,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 191 transitions. [2018-12-01 19:14:59,471 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 191 transitions. Word has length 300 [2018-12-01 19:14:59,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 19:14:59,471 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 191 transitions. [2018-12-01 19:14:59,472 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-12-01 19:14:59,472 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 191 transitions. [2018-12-01 19:14:59,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2018-12-01 19:14:59,472 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 19:14:59,472 INFO L402 BasicCegarLoop]: trace histogram [43, 43, 42, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 19:14:59,473 INFO L423 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 19:14:59,473 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 19:14:59,473 INFO L82 PathProgramCache]: Analyzing trace with hash 707039787, now seen corresponding path program 42 times [2018-12-01 19:14:59,473 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 19:14:59,473 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 19:14:59,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:14:59,473 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 19:14:59,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:14:59,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:14:59,992 INFO L134 CoverageAnalysis]: Checked inductivity of 6195 backedges. 0 proven. 2667 refuted. 0 times theorem prover too weak. 3528 trivial. 0 not checked. [2018-12-01 19:14:59,992 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 19:14:59,992 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/bin-2019/uautomizer/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 19:14:59,997 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-01 19:15:00,106 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-12-01 19:15:00,106 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 19:15:00,111 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 19:15:00,165 INFO L134 CoverageAnalysis]: Checked inductivity of 6195 backedges. 0 proven. 2667 refuted. 0 times theorem prover too weak. 3528 trivial. 0 not checked. [2018-12-01 19:15:00,179 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 19:15:00,180 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-12-01 19:15:00,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-12-01 19:15:00,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-12-01 19:15:00,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=994, Invalid=1168, Unknown=0, NotChecked=0, Total=2162 [2018-12-01 19:15:00,180 INFO L87 Difference]: Start difference. First operand 145 states and 191 transitions. Second operand 47 states. [2018-12-01 19:15:00,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 19:15:00,939 INFO L93 Difference]: Finished difference Result 152 states and 199 transitions. [2018-12-01 19:15:00,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-12-01 19:15:00,939 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 307 [2018-12-01 19:15:00,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 19:15:00,940 INFO L225 Difference]: With dead ends: 152 [2018-12-01 19:15:00,940 INFO L226 Difference]: Without dead ends: 148 [2018-12-01 19:15:00,940 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 350 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2972, Invalid=5038, Unknown=0, NotChecked=0, Total=8010 [2018-12-01 19:15:00,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2018-12-01 19:15:00,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2018-12-01 19:15:00,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-12-01 19:15:00,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 195 transitions. [2018-12-01 19:15:00,951 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 195 transitions. Word has length 307 [2018-12-01 19:15:00,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 19:15:00,951 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 195 transitions. [2018-12-01 19:15:00,951 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-12-01 19:15:00,951 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 195 transitions. [2018-12-01 19:15:00,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2018-12-01 19:15:00,952 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 19:15:00,952 INFO L402 BasicCegarLoop]: trace histogram [44, 44, 43, 43, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 19:15:00,952 INFO L423 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 19:15:00,952 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 19:15:00,952 INFO L82 PathProgramCache]: Analyzing trace with hash -1671645474, now seen corresponding path program 43 times [2018-12-01 19:15:00,952 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 19:15:00,952 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 19:15:00,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:15:00,953 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 19:15:00,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:15:00,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:15:01,509 INFO L134 CoverageAnalysis]: Checked inductivity of 6493 backedges. 0 proven. 2795 refuted. 0 times theorem prover too weak. 3698 trivial. 0 not checked. [2018-12-01 19:15:01,509 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 19:15:01,509 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/bin-2019/uautomizer/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 19:15:01,515 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 19:15:01,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:15:01,563 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 19:15:01,612 INFO L134 CoverageAnalysis]: Checked inductivity of 6493 backedges. 0 proven. 2795 refuted. 0 times theorem prover too weak. 3698 trivial. 0 not checked. [2018-12-01 19:15:01,626 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 19:15:01,626 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-12-01 19:15:01,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-12-01 19:15:01,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-12-01 19:15:01,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1039, Invalid=1217, Unknown=0, NotChecked=0, Total=2256 [2018-12-01 19:15:01,627 INFO L87 Difference]: Start difference. First operand 148 states and 195 transitions. Second operand 48 states. [2018-12-01 19:15:02,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 19:15:02,431 INFO L93 Difference]: Finished difference Result 155 states and 203 transitions. [2018-12-01 19:15:02,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-12-01 19:15:02,432 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 314 [2018-12-01 19:15:02,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 19:15:02,432 INFO L225 Difference]: With dead ends: 155 [2018-12-01 19:15:02,432 INFO L226 Difference]: Without dead ends: 151 [2018-12-01 19:15:02,433 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 358 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=3107, Invalid=5265, Unknown=0, NotChecked=0, Total=8372 [2018-12-01 19:15:02,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-12-01 19:15:02,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2018-12-01 19:15:02,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-12-01 19:15:02,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 199 transitions. [2018-12-01 19:15:02,443 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 199 transitions. Word has length 314 [2018-12-01 19:15:02,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 19:15:02,444 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 199 transitions. [2018-12-01 19:15:02,444 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-12-01 19:15:02,444 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 199 transitions. [2018-12-01 19:15:02,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2018-12-01 19:15:02,444 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 19:15:02,445 INFO L402 BasicCegarLoop]: trace histogram [45, 45, 44, 44, 44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 19:15:02,445 INFO L423 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 19:15:02,445 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 19:15:02,445 INFO L82 PathProgramCache]: Analyzing trace with hash -797576639, now seen corresponding path program 44 times [2018-12-01 19:15:02,445 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 19:15:02,445 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 19:15:02,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:15:02,445 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 19:15:02,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:15:02,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:15:03,018 INFO L134 CoverageAnalysis]: Checked inductivity of 6798 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 3872 trivial. 0 not checked. [2018-12-01 19:15:03,018 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 19:15:03,018 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/bin-2019/uautomizer/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 19:15:03,024 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-01 19:15:03,072 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-01 19:15:03,072 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 19:15:03,076 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 19:15:03,126 INFO L134 CoverageAnalysis]: Checked inductivity of 6798 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 3872 trivial. 0 not checked. [2018-12-01 19:15:03,141 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 19:15:03,141 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-12-01 19:15:03,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-12-01 19:15:03,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-12-01 19:15:03,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1085, Invalid=1267, Unknown=0, NotChecked=0, Total=2352 [2018-12-01 19:15:03,141 INFO L87 Difference]: Start difference. First operand 151 states and 199 transitions. Second operand 49 states. [2018-12-01 19:15:03,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 19:15:03,982 INFO L93 Difference]: Finished difference Result 158 states and 207 transitions. [2018-12-01 19:15:03,982 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-12-01 19:15:03,982 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 321 [2018-12-01 19:15:03,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 19:15:03,983 INFO L225 Difference]: With dead ends: 158 [2018-12-01 19:15:03,983 INFO L226 Difference]: Without dead ends: 154 [2018-12-01 19:15:03,983 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 458 GetRequests, 366 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=3245, Invalid=5497, Unknown=0, NotChecked=0, Total=8742 [2018-12-01 19:15:03,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2018-12-01 19:15:03,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2018-12-01 19:15:03,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2018-12-01 19:15:03,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 203 transitions. [2018-12-01 19:15:03,994 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 203 transitions. Word has length 321 [2018-12-01 19:15:03,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 19:15:03,995 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 203 transitions. [2018-12-01 19:15:03,995 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-12-01 19:15:03,995 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 203 transitions. [2018-12-01 19:15:03,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2018-12-01 19:15:03,995 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 19:15:03,995 INFO L402 BasicCegarLoop]: trace histogram [46, 46, 45, 45, 45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 19:15:03,996 INFO L423 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 19:15:03,996 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 19:15:03,996 INFO L82 PathProgramCache]: Analyzing trace with hash 44725832, now seen corresponding path program 45 times [2018-12-01 19:15:03,996 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 19:15:03,996 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 19:15:03,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:15:03,996 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 19:15:03,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:15:04,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:15:04,584 INFO L134 CoverageAnalysis]: Checked inductivity of 7110 backedges. 0 proven. 3060 refuted. 0 times theorem prover too weak. 4050 trivial. 0 not checked. [2018-12-01 19:15:04,585 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 19:15:04,585 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/bin-2019/uautomizer/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 19:15:04,590 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-01 19:15:04,702 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2018-12-01 19:15:04,702 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 19:15:04,706 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 19:15:04,775 INFO L134 CoverageAnalysis]: Checked inductivity of 7110 backedges. 0 proven. 3060 refuted. 0 times theorem prover too weak. 4050 trivial. 0 not checked. [2018-12-01 19:15:04,790 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 19:15:04,790 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-12-01 19:15:04,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-12-01 19:15:04,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-12-01 19:15:04,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1132, Invalid=1318, Unknown=0, NotChecked=0, Total=2450 [2018-12-01 19:15:04,791 INFO L87 Difference]: Start difference. First operand 154 states and 203 transitions. Second operand 50 states. [2018-12-01 19:15:05,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 19:15:05,605 INFO L93 Difference]: Finished difference Result 161 states and 211 transitions. [2018-12-01 19:15:05,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-12-01 19:15:05,605 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 328 [2018-12-01 19:15:05,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 19:15:05,606 INFO L225 Difference]: With dead ends: 161 [2018-12-01 19:15:05,606 INFO L226 Difference]: Without dead ends: 157 [2018-12-01 19:15:05,607 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 374 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=3386, Invalid=5734, Unknown=0, NotChecked=0, Total=9120 [2018-12-01 19:15:05,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-12-01 19:15:05,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2018-12-01 19:15:05,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-12-01 19:15:05,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 207 transitions. [2018-12-01 19:15:05,619 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 207 transitions. Word has length 328 [2018-12-01 19:15:05,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 19:15:05,619 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 207 transitions. [2018-12-01 19:15:05,619 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-12-01 19:15:05,619 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 207 transitions. [2018-12-01 19:15:05,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2018-12-01 19:15:05,621 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 19:15:05,621 INFO L402 BasicCegarLoop]: trace histogram [47, 47, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 19:15:05,621 INFO L423 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 19:15:05,621 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 19:15:05,621 INFO L82 PathProgramCache]: Analyzing trace with hash 454376279, now seen corresponding path program 46 times [2018-12-01 19:15:05,622 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 19:15:05,622 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 19:15:05,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:15:05,622 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 19:15:05,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:15:05,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:15:06,264 INFO L134 CoverageAnalysis]: Checked inductivity of 7429 backedges. 0 proven. 3197 refuted. 0 times theorem prover too weak. 4232 trivial. 0 not checked. [2018-12-01 19:15:06,264 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 19:15:06,264 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/bin-2019/uautomizer/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 19:15:06,271 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-01 19:15:06,321 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-01 19:15:06,322 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 19:15:06,326 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 19:15:06,398 INFO L134 CoverageAnalysis]: Checked inductivity of 7429 backedges. 0 proven. 3197 refuted. 0 times theorem prover too weak. 4232 trivial. 0 not checked. [2018-12-01 19:15:06,423 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 19:15:06,423 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-12-01 19:15:06,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-12-01 19:15:06,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-12-01 19:15:06,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1180, Invalid=1370, Unknown=0, NotChecked=0, Total=2550 [2018-12-01 19:15:06,424 INFO L87 Difference]: Start difference. First operand 157 states and 207 transitions. Second operand 51 states. [2018-12-01 19:15:07,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 19:15:07,332 INFO L93 Difference]: Finished difference Result 164 states and 215 transitions. [2018-12-01 19:15:07,332 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-12-01 19:15:07,333 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 335 [2018-12-01 19:15:07,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 19:15:07,333 INFO L225 Difference]: With dead ends: 164 [2018-12-01 19:15:07,333 INFO L226 Difference]: Without dead ends: 160 [2018-12-01 19:15:07,334 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 478 GetRequests, 382 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=3530, Invalid=5976, Unknown=0, NotChecked=0, Total=9506 [2018-12-01 19:15:07,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2018-12-01 19:15:07,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2018-12-01 19:15:07,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-12-01 19:15:07,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 211 transitions. [2018-12-01 19:15:07,352 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 211 transitions. Word has length 335 [2018-12-01 19:15:07,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 19:15:07,352 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 211 transitions. [2018-12-01 19:15:07,352 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-12-01 19:15:07,352 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 211 transitions. [2018-12-01 19:15:07,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2018-12-01 19:15:07,353 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 19:15:07,353 INFO L402 BasicCegarLoop]: trace histogram [48, 48, 47, 47, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 19:15:07,353 INFO L423 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 19:15:07,353 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 19:15:07,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1718484146, now seen corresponding path program 47 times [2018-12-01 19:15:07,353 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 19:15:07,353 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 19:15:07,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:15:07,354 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 19:15:07,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:15:07,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:15:08,017 INFO L134 CoverageAnalysis]: Checked inductivity of 7755 backedges. 0 proven. 3337 refuted. 0 times theorem prover too weak. 4418 trivial. 0 not checked. [2018-12-01 19:15:08,017 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 19:15:08,017 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/bin-2019/uautomizer/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 19:15:08,023 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-01 19:15:08,153 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2018-12-01 19:15:08,153 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 19:15:08,160 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 19:15:08,217 INFO L134 CoverageAnalysis]: Checked inductivity of 7755 backedges. 0 proven. 3337 refuted. 0 times theorem prover too weak. 4418 trivial. 0 not checked. [2018-12-01 19:15:08,232 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 19:15:08,232 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-12-01 19:15:08,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-12-01 19:15:08,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-12-01 19:15:08,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1229, Invalid=1423, Unknown=0, NotChecked=0, Total=2652 [2018-12-01 19:15:08,233 INFO L87 Difference]: Start difference. First operand 160 states and 211 transitions. Second operand 52 states. [2018-12-01 19:15:09,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 19:15:09,105 INFO L93 Difference]: Finished difference Result 167 states and 219 transitions. [2018-12-01 19:15:09,106 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-12-01 19:15:09,106 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 342 [2018-12-01 19:15:09,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 19:15:09,106 INFO L225 Difference]: With dead ends: 167 [2018-12-01 19:15:09,106 INFO L226 Difference]: Without dead ends: 163 [2018-12-01 19:15:09,107 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 390 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=3677, Invalid=6223, Unknown=0, NotChecked=0, Total=9900 [2018-12-01 19:15:09,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-12-01 19:15:09,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2018-12-01 19:15:09,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-12-01 19:15:09,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 215 transitions. [2018-12-01 19:15:09,126 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 215 transitions. Word has length 342 [2018-12-01 19:15:09,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 19:15:09,126 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 215 transitions. [2018-12-01 19:15:09,126 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-12-01 19:15:09,126 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 215 transitions. [2018-12-01 19:15:09,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2018-12-01 19:15:09,128 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 19:15:09,128 INFO L402 BasicCegarLoop]: trace histogram [49, 49, 48, 48, 48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 19:15:09,128 INFO L423 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 19:15:09,128 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 19:15:09,129 INFO L82 PathProgramCache]: Analyzing trace with hash 849546605, now seen corresponding path program 48 times [2018-12-01 19:15:09,129 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 19:15:09,129 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 19:15:09,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:15:09,129 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 19:15:09,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:15:09,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:15:09,800 INFO L134 CoverageAnalysis]: Checked inductivity of 8088 backedges. 0 proven. 3480 refuted. 0 times theorem prover too weak. 4608 trivial. 0 not checked. [2018-12-01 19:15:09,800 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 19:15:09,800 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/bin-2019/uautomizer/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 19:15:09,806 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-01 19:15:09,919 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-12-01 19:15:09,920 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 19:15:09,924 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 19:15:09,989 INFO L134 CoverageAnalysis]: Checked inductivity of 8088 backedges. 0 proven. 3480 refuted. 0 times theorem prover too weak. 4608 trivial. 0 not checked. [2018-12-01 19:15:10,003 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 19:15:10,004 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-12-01 19:15:10,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-12-01 19:15:10,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-12-01 19:15:10,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1279, Invalid=1477, Unknown=0, NotChecked=0, Total=2756 [2018-12-01 19:15:10,004 INFO L87 Difference]: Start difference. First operand 163 states and 215 transitions. Second operand 53 states. [2018-12-01 19:15:10,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 19:15:10,945 INFO L93 Difference]: Finished difference Result 170 states and 223 transitions. [2018-12-01 19:15:10,945 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-12-01 19:15:10,945 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 349 [2018-12-01 19:15:10,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 19:15:10,946 INFO L225 Difference]: With dead ends: 170 [2018-12-01 19:15:10,946 INFO L226 Difference]: Without dead ends: 166 [2018-12-01 19:15:10,946 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 498 GetRequests, 398 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=3827, Invalid=6475, Unknown=0, NotChecked=0, Total=10302 [2018-12-01 19:15:10,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2018-12-01 19:15:10,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2018-12-01 19:15:10,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2018-12-01 19:15:10,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 219 transitions. [2018-12-01 19:15:10,960 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 219 transitions. Word has length 349 [2018-12-01 19:15:10,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 19:15:10,960 INFO L480 AbstractCegarLoop]: Abstraction has 166 states and 219 transitions. [2018-12-01 19:15:10,960 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-12-01 19:15:10,960 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 219 transitions. [2018-12-01 19:15:10,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2018-12-01 19:15:10,961 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 19:15:10,961 INFO L402 BasicCegarLoop]: trace histogram [50, 50, 49, 49, 49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 19:15:10,961 INFO L423 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 19:15:10,961 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 19:15:10,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1560892900, now seen corresponding path program 49 times [2018-12-01 19:15:10,961 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 19:15:10,962 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 19:15:10,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:15:10,962 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 19:15:10,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:15:10,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:15:11,662 INFO L134 CoverageAnalysis]: Checked inductivity of 8428 backedges. 0 proven. 3626 refuted. 0 times theorem prover too weak. 4802 trivial. 0 not checked. [2018-12-01 19:15:11,662 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 19:15:11,662 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/bin-2019/uautomizer/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 19:15:11,668 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 19:15:11,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:15:11,723 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 19:15:11,784 INFO L134 CoverageAnalysis]: Checked inductivity of 8428 backedges. 0 proven. 3626 refuted. 0 times theorem prover too weak. 4802 trivial. 0 not checked. [2018-12-01 19:15:11,798 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 19:15:11,798 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-12-01 19:15:11,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-12-01 19:15:11,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-12-01 19:15:11,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1330, Invalid=1532, Unknown=0, NotChecked=0, Total=2862 [2018-12-01 19:15:11,799 INFO L87 Difference]: Start difference. First operand 166 states and 219 transitions. Second operand 54 states. [2018-12-01 19:15:12,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 19:15:12,715 INFO L93 Difference]: Finished difference Result 173 states and 227 transitions. [2018-12-01 19:15:12,716 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-12-01 19:15:12,716 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 356 [2018-12-01 19:15:12,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 19:15:12,716 INFO L225 Difference]: With dead ends: 173 [2018-12-01 19:15:12,716 INFO L226 Difference]: Without dead ends: 169 [2018-12-01 19:15:12,717 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 508 GetRequests, 406 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3980, Invalid=6732, Unknown=0, NotChecked=0, Total=10712 [2018-12-01 19:15:12,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-12-01 19:15:12,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2018-12-01 19:15:12,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-12-01 19:15:12,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 223 transitions. [2018-12-01 19:15:12,731 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 223 transitions. Word has length 356 [2018-12-01 19:15:12,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 19:15:12,731 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 223 transitions. [2018-12-01 19:15:12,731 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-12-01 19:15:12,732 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 223 transitions. [2018-12-01 19:15:12,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2018-12-01 19:15:12,732 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 19:15:12,733 INFO L402 BasicCegarLoop]: trace histogram [51, 51, 50, 50, 50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 19:15:12,733 INFO L423 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 19:15:12,733 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 19:15:12,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1352660861, now seen corresponding path program 50 times [2018-12-01 19:15:12,733 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 19:15:12,733 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 19:15:12,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:15:12,733 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 19:15:12,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:15:12,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:15:13,453 INFO L134 CoverageAnalysis]: Checked inductivity of 8775 backedges. 0 proven. 3775 refuted. 0 times theorem prover too weak. 5000 trivial. 0 not checked. [2018-12-01 19:15:13,453 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 19:15:13,453 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/bin-2019/uautomizer/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 19:15:13,459 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-01 19:15:13,512 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-01 19:15:13,512 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 19:15:13,516 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 19:15:13,583 INFO L134 CoverageAnalysis]: Checked inductivity of 8775 backedges. 0 proven. 3775 refuted. 0 times theorem prover too weak. 5000 trivial. 0 not checked. [2018-12-01 19:15:13,597 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 19:15:13,598 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-12-01 19:15:13,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-12-01 19:15:13,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-12-01 19:15:13,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1382, Invalid=1588, Unknown=0, NotChecked=0, Total=2970 [2018-12-01 19:15:13,598 INFO L87 Difference]: Start difference. First operand 169 states and 223 transitions. Second operand 55 states. [2018-12-01 19:15:14,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 19:15:14,664 INFO L93 Difference]: Finished difference Result 176 states and 231 transitions. [2018-12-01 19:15:14,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-12-01 19:15:14,664 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 363 [2018-12-01 19:15:14,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 19:15:14,665 INFO L225 Difference]: With dead ends: 176 [2018-12-01 19:15:14,665 INFO L226 Difference]: Without dead ends: 172 [2018-12-01 19:15:14,665 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 518 GetRequests, 414 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1325 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=4136, Invalid=6994, Unknown=0, NotChecked=0, Total=11130 [2018-12-01 19:15:14,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2018-12-01 19:15:14,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2018-12-01 19:15:14,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2018-12-01 19:15:14,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 227 transitions. [2018-12-01 19:15:14,682 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 227 transitions. Word has length 363 [2018-12-01 19:15:14,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 19:15:14,682 INFO L480 AbstractCegarLoop]: Abstraction has 172 states and 227 transitions. [2018-12-01 19:15:14,682 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-12-01 19:15:14,682 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 227 transitions. [2018-12-01 19:15:14,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2018-12-01 19:15:14,683 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 19:15:14,683 INFO L402 BasicCegarLoop]: trace histogram [52, 52, 51, 51, 51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 19:15:14,683 INFO L423 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 19:15:14,683 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 19:15:14,683 INFO L82 PathProgramCache]: Analyzing trace with hash -722215290, now seen corresponding path program 51 times [2018-12-01 19:15:14,683 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 19:15:14,684 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 19:15:14,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:15:14,684 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 19:15:14,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:15:14,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:15:15,448 INFO L134 CoverageAnalysis]: Checked inductivity of 9129 backedges. 0 proven. 3927 refuted. 0 times theorem prover too weak. 5202 trivial. 0 not checked. [2018-12-01 19:15:15,448 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 19:15:15,448 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/bin-2019/uautomizer/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 19:15:15,454 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-01 19:15:15,588 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2018-12-01 19:15:15,588 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 19:15:15,593 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 19:15:15,658 INFO L134 CoverageAnalysis]: Checked inductivity of 9129 backedges. 0 proven. 3927 refuted. 0 times theorem prover too weak. 5202 trivial. 0 not checked. [2018-12-01 19:15:15,672 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 19:15:15,673 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-12-01 19:15:15,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-12-01 19:15:15,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-12-01 19:15:15,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1435, Invalid=1645, Unknown=0, NotChecked=0, Total=3080 [2018-12-01 19:15:15,673 INFO L87 Difference]: Start difference. First operand 172 states and 227 transitions. Second operand 56 states. [2018-12-01 19:15:16,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 19:15:16,820 INFO L93 Difference]: Finished difference Result 179 states and 235 transitions. [2018-12-01 19:15:16,820 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-12-01 19:15:16,820 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 370 [2018-12-01 19:15:16,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 19:15:16,821 INFO L225 Difference]: With dead ends: 179 [2018-12-01 19:15:16,821 INFO L226 Difference]: Without dead ends: 175 [2018-12-01 19:15:16,822 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 528 GetRequests, 422 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=4295, Invalid=7261, Unknown=0, NotChecked=0, Total=11556 [2018-12-01 19:15:16,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-12-01 19:15:16,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2018-12-01 19:15:16,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-12-01 19:15:16,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 231 transitions. [2018-12-01 19:15:16,838 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 231 transitions. Word has length 370 [2018-12-01 19:15:16,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 19:15:16,838 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 231 transitions. [2018-12-01 19:15:16,838 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-12-01 19:15:16,839 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 231 transitions. [2018-12-01 19:15:16,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2018-12-01 19:15:16,840 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 19:15:16,840 INFO L402 BasicCegarLoop]: trace histogram [53, 53, 52, 52, 52, 52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 19:15:16,840 INFO L423 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 19:15:16,841 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 19:15:16,841 INFO L82 PathProgramCache]: Analyzing trace with hash -148058983, now seen corresponding path program 52 times [2018-12-01 19:15:16,841 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 19:15:16,841 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 19:15:16,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:15:16,841 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 19:15:16,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:15:16,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:15:17,615 INFO L134 CoverageAnalysis]: Checked inductivity of 9490 backedges. 0 proven. 4082 refuted. 0 times theorem prover too weak. 5408 trivial. 0 not checked. [2018-12-01 19:15:17,616 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 19:15:17,616 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/bin-2019/uautomizer/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 19:15:17,622 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-01 19:15:17,684 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-01 19:15:17,685 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 19:15:17,691 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 19:15:17,757 INFO L134 CoverageAnalysis]: Checked inductivity of 9490 backedges. 0 proven. 4082 refuted. 0 times theorem prover too weak. 5408 trivial. 0 not checked. [2018-12-01 19:15:17,772 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 19:15:17,772 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-12-01 19:15:17,772 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-12-01 19:15:17,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-12-01 19:15:17,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1489, Invalid=1703, Unknown=0, NotChecked=0, Total=3192 [2018-12-01 19:15:17,773 INFO L87 Difference]: Start difference. First operand 175 states and 231 transitions. Second operand 57 states. [2018-12-01 19:15:18,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 19:15:18,946 INFO L93 Difference]: Finished difference Result 182 states and 239 transitions. [2018-12-01 19:15:18,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-12-01 19:15:18,946 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 377 [2018-12-01 19:15:18,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 19:15:18,947 INFO L225 Difference]: With dead ends: 182 [2018-12-01 19:15:18,947 INFO L226 Difference]: Without dead ends: 178 [2018-12-01 19:15:18,948 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 538 GetRequests, 430 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1430 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=4457, Invalid=7533, Unknown=0, NotChecked=0, Total=11990 [2018-12-01 19:15:18,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2018-12-01 19:15:18,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2018-12-01 19:15:18,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2018-12-01 19:15:18,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 235 transitions. [2018-12-01 19:15:18,965 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 235 transitions. Word has length 377 [2018-12-01 19:15:18,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 19:15:18,966 INFO L480 AbstractCegarLoop]: Abstraction has 178 states and 235 transitions. [2018-12-01 19:15:18,966 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-12-01 19:15:18,966 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 235 transitions. [2018-12-01 19:15:18,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 385 [2018-12-01 19:15:18,967 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 19:15:18,967 INFO L402 BasicCegarLoop]: trace histogram [54, 54, 53, 53, 53, 53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 19:15:18,967 INFO L423 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 19:15:18,967 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 19:15:18,967 INFO L82 PathProgramCache]: Analyzing trace with hash 2088040944, now seen corresponding path program 53 times [2018-12-01 19:15:18,967 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 19:15:18,967 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 19:15:18,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:15:18,968 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 19:15:18,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:15:18,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:15:19,751 INFO L134 CoverageAnalysis]: Checked inductivity of 9858 backedges. 0 proven. 4240 refuted. 0 times theorem prover too weak. 5618 trivial. 0 not checked. [2018-12-01 19:15:19,751 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 19:15:19,751 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/bin-2019/uautomizer/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 19:15:19,757 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-01 19:15:19,913 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2018-12-01 19:15:19,913 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 19:15:19,921 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 19:15:19,995 INFO L134 CoverageAnalysis]: Checked inductivity of 9858 backedges. 0 proven. 4240 refuted. 0 times theorem prover too weak. 5618 trivial. 0 not checked. [2018-12-01 19:15:20,010 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 19:15:20,010 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-12-01 19:15:20,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-12-01 19:15:20,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-12-01 19:15:20,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1544, Invalid=1762, Unknown=0, NotChecked=0, Total=3306 [2018-12-01 19:15:20,011 INFO L87 Difference]: Start difference. First operand 178 states and 235 transitions. Second operand 58 states. [2018-12-01 19:15:21,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 19:15:21,165 INFO L93 Difference]: Finished difference Result 185 states and 243 transitions. [2018-12-01 19:15:21,165 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-12-01 19:15:21,165 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 384 [2018-12-01 19:15:21,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 19:15:21,166 INFO L225 Difference]: With dead ends: 185 [2018-12-01 19:15:21,166 INFO L226 Difference]: Without dead ends: 181 [2018-12-01 19:15:21,167 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 548 GetRequests, 438 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1484 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=4622, Invalid=7810, Unknown=0, NotChecked=0, Total=12432 [2018-12-01 19:15:21,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-12-01 19:15:21,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2018-12-01 19:15:21,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-12-01 19:15:21,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 239 transitions. [2018-12-01 19:15:21,184 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 239 transitions. Word has length 384 [2018-12-01 19:15:21,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 19:15:21,184 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 239 transitions. [2018-12-01 19:15:21,184 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-12-01 19:15:21,184 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 239 transitions. [2018-12-01 19:15:21,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 392 [2018-12-01 19:15:21,185 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 19:15:21,185 INFO L402 BasicCegarLoop]: trace histogram [55, 55, 54, 54, 54, 54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 19:15:21,185 INFO L423 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 19:15:21,185 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 19:15:21,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1685456465, now seen corresponding path program 54 times [2018-12-01 19:15:21,186 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 19:15:21,186 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 19:15:21,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:15:21,186 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 19:15:21,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:15:21,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:15:22,027 INFO L134 CoverageAnalysis]: Checked inductivity of 10233 backedges. 0 proven. 4401 refuted. 0 times theorem prover too weak. 5832 trivial. 0 not checked. [2018-12-01 19:15:22,027 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 19:15:22,027 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/bin-2019/uautomizer/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 19:15:22,033 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-01 19:15:22,173 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-12-01 19:15:22,173 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 19:15:22,179 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 19:15:22,257 INFO L134 CoverageAnalysis]: Checked inductivity of 10233 backedges. 0 proven. 4401 refuted. 0 times theorem prover too weak. 5832 trivial. 0 not checked. [2018-12-01 19:15:22,271 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 19:15:22,272 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-12-01 19:15:22,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-12-01 19:15:22,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-12-01 19:15:22,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1600, Invalid=1822, Unknown=0, NotChecked=0, Total=3422 [2018-12-01 19:15:22,272 INFO L87 Difference]: Start difference. First operand 181 states and 239 transitions. Second operand 59 states. [2018-12-01 19:15:23,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 19:15:23,462 INFO L93 Difference]: Finished difference Result 188 states and 247 transitions. [2018-12-01 19:15:23,462 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-12-01 19:15:23,462 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 391 [2018-12-01 19:15:23,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 19:15:23,462 INFO L225 Difference]: With dead ends: 188 [2018-12-01 19:15:23,462 INFO L226 Difference]: Without dead ends: 184 [2018-12-01 19:15:23,463 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 558 GetRequests, 446 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=4790, Invalid=8092, Unknown=0, NotChecked=0, Total=12882 [2018-12-01 19:15:23,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2018-12-01 19:15:23,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2018-12-01 19:15:23,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2018-12-01 19:15:23,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 243 transitions. [2018-12-01 19:15:23,481 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 243 transitions. Word has length 391 [2018-12-01 19:15:23,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 19:15:23,482 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 243 transitions. [2018-12-01 19:15:23,482 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-12-01 19:15:23,482 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 243 transitions. [2018-12-01 19:15:23,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 399 [2018-12-01 19:15:23,483 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 19:15:23,483 INFO L402 BasicCegarLoop]: trace histogram [56, 56, 55, 55, 55, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 19:15:23,483 INFO L423 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 19:15:23,483 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 19:15:23,483 INFO L82 PathProgramCache]: Analyzing trace with hash -1628873638, now seen corresponding path program 55 times [2018-12-01 19:15:23,483 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 19:15:23,483 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 19:15:23,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:15:23,484 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 19:15:23,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:15:23,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:15:24,351 INFO L134 CoverageAnalysis]: Checked inductivity of 10615 backedges. 0 proven. 4565 refuted. 0 times theorem prover too weak. 6050 trivial. 0 not checked. [2018-12-01 19:15:24,351 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 19:15:24,351 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/bin-2019/uautomizer/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 19:15:24,357 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 19:15:24,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:15:24,417 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 19:15:24,496 INFO L134 CoverageAnalysis]: Checked inductivity of 10615 backedges. 0 proven. 4565 refuted. 0 times theorem prover too weak. 6050 trivial. 0 not checked. [2018-12-01 19:15:24,511 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 19:15:24,511 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-12-01 19:15:24,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-12-01 19:15:24,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-12-01 19:15:24,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1657, Invalid=1883, Unknown=0, NotChecked=0, Total=3540 [2018-12-01 19:15:24,512 INFO L87 Difference]: Start difference. First operand 184 states and 243 transitions. Second operand 60 states. [2018-12-01 19:15:25,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 19:15:25,781 INFO L93 Difference]: Finished difference Result 191 states and 251 transitions. [2018-12-01 19:15:25,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-12-01 19:15:25,782 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 398 [2018-12-01 19:15:25,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 19:15:25,782 INFO L225 Difference]: With dead ends: 191 [2018-12-01 19:15:25,782 INFO L226 Difference]: Without dead ends: 187 [2018-12-01 19:15:25,783 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 568 GetRequests, 454 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1595 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=4961, Invalid=8379, Unknown=0, NotChecked=0, Total=13340 [2018-12-01 19:15:25,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-12-01 19:15:25,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2018-12-01 19:15:25,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-12-01 19:15:25,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 247 transitions. [2018-12-01 19:15:25,803 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 247 transitions. Word has length 398 [2018-12-01 19:15:25,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 19:15:25,804 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 247 transitions. [2018-12-01 19:15:25,804 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-12-01 19:15:25,804 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 247 transitions. [2018-12-01 19:15:25,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 406 [2018-12-01 19:15:25,805 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 19:15:25,806 INFO L402 BasicCegarLoop]: trace histogram [57, 57, 56, 56, 56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 19:15:25,806 INFO L423 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 19:15:25,806 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 19:15:25,806 INFO L82 PathProgramCache]: Analyzing trace with hash -1214763067, now seen corresponding path program 56 times [2018-12-01 19:15:25,806 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 19:15:25,806 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 19:15:25,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:15:25,807 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 19:15:25,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:15:25,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:15:26,699 INFO L134 CoverageAnalysis]: Checked inductivity of 11004 backedges. 0 proven. 4732 refuted. 0 times theorem prover too weak. 6272 trivial. 0 not checked. [2018-12-01 19:15:26,699 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 19:15:26,699 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/bin-2019/uautomizer/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 19:15:26,705 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-01 19:15:26,771 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-01 19:15:26,771 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 19:15:26,775 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 19:15:26,850 INFO L134 CoverageAnalysis]: Checked inductivity of 11004 backedges. 0 proven. 4732 refuted. 0 times theorem prover too weak. 6272 trivial. 0 not checked. [2018-12-01 19:15:26,864 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 19:15:26,865 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-12-01 19:15:26,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-12-01 19:15:26,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-12-01 19:15:26,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1715, Invalid=1945, Unknown=0, NotChecked=0, Total=3660 [2018-12-01 19:15:26,866 INFO L87 Difference]: Start difference. First operand 187 states and 247 transitions. Second operand 61 states. [2018-12-01 19:15:28,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 19:15:28,136 INFO L93 Difference]: Finished difference Result 194 states and 255 transitions. [2018-12-01 19:15:28,137 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-12-01 19:15:28,137 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 405 [2018-12-01 19:15:28,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 19:15:28,137 INFO L225 Difference]: With dead ends: 194 [2018-12-01 19:15:28,137 INFO L226 Difference]: Without dead ends: 190 [2018-12-01 19:15:28,138 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 578 GetRequests, 462 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1652 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=5135, Invalid=8671, Unknown=0, NotChecked=0, Total=13806 [2018-12-01 19:15:28,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2018-12-01 19:15:28,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 190. [2018-12-01 19:15:28,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2018-12-01 19:15:28,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 251 transitions. [2018-12-01 19:15:28,157 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 251 transitions. Word has length 405 [2018-12-01 19:15:28,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 19:15:28,158 INFO L480 AbstractCegarLoop]: Abstraction has 190 states and 251 transitions. [2018-12-01 19:15:28,158 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-12-01 19:15:28,158 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 251 transitions. [2018-12-01 19:15:28,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 413 [2018-12-01 19:15:28,159 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 19:15:28,159 INFO L402 BasicCegarLoop]: trace histogram [58, 58, 57, 57, 57, 57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 19:15:28,159 INFO L423 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 19:15:28,159 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 19:15:28,159 INFO L82 PathProgramCache]: Analyzing trace with hash -383752764, now seen corresponding path program 57 times [2018-12-01 19:15:28,159 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 19:15:28,159 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 19:15:28,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:15:28,160 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 19:15:28,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:15:28,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:15:29,079 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 0 proven. 4902 refuted. 0 times theorem prover too weak. 6498 trivial. 0 not checked. [2018-12-01 19:15:29,079 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 19:15:29,080 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/bin-2019/uautomizer/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 19:15:29,086 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-01 19:15:29,246 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2018-12-01 19:15:29,246 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 19:15:29,252 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 19:15:29,329 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 0 proven. 4902 refuted. 0 times theorem prover too weak. 6498 trivial. 0 not checked. [2018-12-01 19:15:29,344 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 19:15:29,345 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-12-01 19:15:29,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-12-01 19:15:29,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-12-01 19:15:29,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1774, Invalid=2008, Unknown=0, NotChecked=0, Total=3782 [2018-12-01 19:15:29,346 INFO L87 Difference]: Start difference. First operand 190 states and 251 transitions. Second operand 62 states. [2018-12-01 19:15:30,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 19:15:30,580 INFO L93 Difference]: Finished difference Result 197 states and 259 transitions. [2018-12-01 19:15:30,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-12-01 19:15:30,581 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 412 [2018-12-01 19:15:30,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 19:15:30,582 INFO L225 Difference]: With dead ends: 197 [2018-12-01 19:15:30,582 INFO L226 Difference]: Without dead ends: 193 [2018-12-01 19:15:30,583 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 588 GetRequests, 470 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1710 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=5312, Invalid=8968, Unknown=0, NotChecked=0, Total=14280 [2018-12-01 19:15:30,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2018-12-01 19:15:30,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2018-12-01 19:15:30,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2018-12-01 19:15:30,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 255 transitions. [2018-12-01 19:15:30,604 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 255 transitions. Word has length 412 [2018-12-01 19:15:30,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 19:15:30,604 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 255 transitions. [2018-12-01 19:15:30,604 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-12-01 19:15:30,604 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 255 transitions. [2018-12-01 19:15:30,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2018-12-01 19:15:30,606 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 19:15:30,606 INFO L402 BasicCegarLoop]: trace histogram [59, 59, 58, 58, 58, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 19:15:30,606 INFO L423 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 19:15:30,606 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 19:15:30,607 INFO L82 PathProgramCache]: Analyzing trace with hash 1310199515, now seen corresponding path program 58 times [2018-12-01 19:15:30,607 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 19:15:30,607 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 19:15:30,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:15:30,607 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 19:15:30,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:15:30,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:15:31,548 INFO L134 CoverageAnalysis]: Checked inductivity of 11803 backedges. 0 proven. 5075 refuted. 0 times theorem prover too weak. 6728 trivial. 0 not checked. [2018-12-01 19:15:31,548 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 19:15:31,548 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/bin-2019/uautomizer/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 19:15:31,554 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-01 19:15:31,619 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-01 19:15:31,619 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 19:15:31,626 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 19:15:31,712 INFO L134 CoverageAnalysis]: Checked inductivity of 11803 backedges. 0 proven. 5075 refuted. 0 times theorem prover too weak. 6728 trivial. 0 not checked. [2018-12-01 19:15:31,727 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 19:15:31,727 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-12-01 19:15:31,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-12-01 19:15:31,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-12-01 19:15:31,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1834, Invalid=2072, Unknown=0, NotChecked=0, Total=3906 [2018-12-01 19:15:31,728 INFO L87 Difference]: Start difference. First operand 193 states and 255 transitions. Second operand 63 states. [2018-12-01 19:15:33,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 19:15:33,057 INFO L93 Difference]: Finished difference Result 200 states and 263 transitions. [2018-12-01 19:15:33,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-12-01 19:15:33,058 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 419 [2018-12-01 19:15:33,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 19:15:33,058 INFO L225 Difference]: With dead ends: 200 [2018-12-01 19:15:33,058 INFO L226 Difference]: Without dead ends: 196 [2018-12-01 19:15:33,059 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 598 GetRequests, 478 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1769 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=5492, Invalid=9270, Unknown=0, NotChecked=0, Total=14762 [2018-12-01 19:15:33,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2018-12-01 19:15:33,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2018-12-01 19:15:33,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2018-12-01 19:15:33,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 259 transitions. [2018-12-01 19:15:33,081 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 259 transitions. Word has length 419 [2018-12-01 19:15:33,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 19:15:33,081 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 259 transitions. [2018-12-01 19:15:33,081 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-12-01 19:15:33,081 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 259 transitions. [2018-12-01 19:15:33,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 427 [2018-12-01 19:15:33,083 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 19:15:33,083 INFO L402 BasicCegarLoop]: trace histogram [60, 60, 59, 59, 59, 59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 19:15:33,083 INFO L423 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 19:15:33,083 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 19:15:33,083 INFO L82 PathProgramCache]: Analyzing trace with hash -783714770, now seen corresponding path program 59 times [2018-12-01 19:15:33,083 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 19:15:33,083 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 19:15:33,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:15:33,083 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 19:15:33,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:15:33,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:15:34,057 INFO L134 CoverageAnalysis]: Checked inductivity of 12213 backedges. 0 proven. 5251 refuted. 0 times theorem prover too weak. 6962 trivial. 0 not checked. [2018-12-01 19:15:34,057 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 19:15:34,057 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/bin-2019/uautomizer/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 19:15:34,064 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-01 19:15:34,259 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2018-12-01 19:15:34,259 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 19:15:34,269 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 19:15:34,357 INFO L134 CoverageAnalysis]: Checked inductivity of 12213 backedges. 0 proven. 5251 refuted. 0 times theorem prover too weak. 6962 trivial. 0 not checked. [2018-12-01 19:15:34,372 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 19:15:34,372 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-12-01 19:15:34,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-12-01 19:15:34,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-12-01 19:15:34,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1895, Invalid=2137, Unknown=0, NotChecked=0, Total=4032 [2018-12-01 19:15:34,373 INFO L87 Difference]: Start difference. First operand 196 states and 259 transitions. Second operand 64 states. [2018-12-01 19:15:35,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 19:15:35,824 INFO L93 Difference]: Finished difference Result 203 states and 267 transitions. [2018-12-01 19:15:35,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-12-01 19:15:35,825 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 426 [2018-12-01 19:15:35,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 19:15:35,825 INFO L225 Difference]: With dead ends: 203 [2018-12-01 19:15:35,825 INFO L226 Difference]: Without dead ends: 199 [2018-12-01 19:15:35,826 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 608 GetRequests, 486 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1829 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=5675, Invalid=9577, Unknown=0, NotChecked=0, Total=15252 [2018-12-01 19:15:35,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2018-12-01 19:15:35,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2018-12-01 19:15:35,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-12-01 19:15:35,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 263 transitions. [2018-12-01 19:15:35,849 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 263 transitions. Word has length 426 [2018-12-01 19:15:35,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 19:15:35,849 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 263 transitions. [2018-12-01 19:15:35,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-12-01 19:15:35,849 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 263 transitions. [2018-12-01 19:15:35,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2018-12-01 19:15:35,851 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 19:15:35,852 INFO L402 BasicCegarLoop]: trace histogram [61, 61, 60, 60, 60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 19:15:35,852 INFO L423 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 19:15:35,852 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 19:15:35,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1486211343, now seen corresponding path program 60 times [2018-12-01 19:15:35,852 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 19:15:35,852 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 19:15:35,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:15:35,853 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 19:15:35,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:15:35,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:15:36,873 INFO L134 CoverageAnalysis]: Checked inductivity of 12630 backedges. 0 proven. 5430 refuted. 0 times theorem prover too weak. 7200 trivial. 0 not checked. [2018-12-01 19:15:36,873 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 19:15:36,873 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/bin-2019/uautomizer/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 19:15:36,879 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-01 19:15:37,047 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2018-12-01 19:15:37,047 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 19:15:37,053 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 19:15:37,138 INFO L134 CoverageAnalysis]: Checked inductivity of 12630 backedges. 0 proven. 5430 refuted. 0 times theorem prover too weak. 7200 trivial. 0 not checked. [2018-12-01 19:15:37,154 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 19:15:37,154 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-12-01 19:15:37,154 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-12-01 19:15:37,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-12-01 19:15:37,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1957, Invalid=2203, Unknown=0, NotChecked=0, Total=4160 [2018-12-01 19:15:37,155 INFO L87 Difference]: Start difference. First operand 199 states and 263 transitions. Second operand 65 states. [2018-12-01 19:15:38,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 19:15:38,591 INFO L93 Difference]: Finished difference Result 206 states and 271 transitions. [2018-12-01 19:15:38,591 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-12-01 19:15:38,591 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 433 [2018-12-01 19:15:38,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 19:15:38,592 INFO L225 Difference]: With dead ends: 206 [2018-12-01 19:15:38,592 INFO L226 Difference]: Without dead ends: 202 [2018-12-01 19:15:38,592 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 618 GetRequests, 494 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1890 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=5861, Invalid=9889, Unknown=0, NotChecked=0, Total=15750 [2018-12-01 19:15:38,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2018-12-01 19:15:38,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2018-12-01 19:15:38,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2018-12-01 19:15:38,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 267 transitions. [2018-12-01 19:15:38,618 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 267 transitions. Word has length 433 [2018-12-01 19:15:38,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 19:15:38,618 INFO L480 AbstractCegarLoop]: Abstraction has 202 states and 267 transitions. [2018-12-01 19:15:38,618 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-12-01 19:15:38,618 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 267 transitions. [2018-12-01 19:15:38,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 441 [2018-12-01 19:15:38,620 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 19:15:38,620 INFO L402 BasicCegarLoop]: trace histogram [62, 62, 61, 61, 61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 19:15:38,621 INFO L423 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 19:15:38,621 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 19:15:38,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1191973480, now seen corresponding path program 61 times [2018-12-01 19:15:38,621 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 19:15:38,621 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 19:15:38,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:15:38,622 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 19:15:38,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:15:38,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:15:39,654 INFO L134 CoverageAnalysis]: Checked inductivity of 13054 backedges. 0 proven. 5612 refuted. 0 times theorem prover too weak. 7442 trivial. 0 not checked. [2018-12-01 19:15:39,654 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 19:15:39,655 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/bin-2019/uautomizer/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 19:15:39,660 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 19:15:39,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:15:39,728 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 19:15:39,822 INFO L134 CoverageAnalysis]: Checked inductivity of 13054 backedges. 0 proven. 5612 refuted. 0 times theorem prover too weak. 7442 trivial. 0 not checked. [2018-12-01 19:15:39,836 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 19:15:39,836 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-12-01 19:15:39,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-12-01 19:15:39,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-12-01 19:15:39,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2020, Invalid=2270, Unknown=0, NotChecked=0, Total=4290 [2018-12-01 19:15:39,837 INFO L87 Difference]: Start difference. First operand 202 states and 267 transitions. Second operand 66 states. [2018-12-01 19:15:41,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 19:15:41,320 INFO L93 Difference]: Finished difference Result 209 states and 275 transitions. [2018-12-01 19:15:41,321 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-12-01 19:15:41,321 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 440 [2018-12-01 19:15:41,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 19:15:41,321 INFO L225 Difference]: With dead ends: 209 [2018-12-01 19:15:41,321 INFO L226 Difference]: Without dead ends: 205 [2018-12-01 19:15:41,322 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 628 GetRequests, 502 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1952 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=6050, Invalid=10206, Unknown=0, NotChecked=0, Total=16256 [2018-12-01 19:15:41,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2018-12-01 19:15:41,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2018-12-01 19:15:41,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2018-12-01 19:15:41,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 271 transitions. [2018-12-01 19:15:41,348 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 271 transitions. Word has length 440 [2018-12-01 19:15:41,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 19:15:41,348 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 271 transitions. [2018-12-01 19:15:41,348 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-12-01 19:15:41,348 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 271 transitions. [2018-12-01 19:15:41,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 448 [2018-12-01 19:15:41,349 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 19:15:41,350 INFO L402 BasicCegarLoop]: trace histogram [63, 63, 62, 62, 62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 19:15:41,350 INFO L423 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 19:15:41,350 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 19:15:41,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1349564409, now seen corresponding path program 62 times [2018-12-01 19:15:41,350 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 19:15:41,350 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 19:15:41,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:15:41,350 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 19:15:41,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:15:41,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:15:42,406 INFO L134 CoverageAnalysis]: Checked inductivity of 13485 backedges. 0 proven. 5797 refuted. 0 times theorem prover too weak. 7688 trivial. 0 not checked. [2018-12-01 19:15:42,407 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 19:15:42,407 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/bin-2019/uautomizer/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 19:15:42,412 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-01 19:15:42,479 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-01 19:15:42,479 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 19:15:42,484 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 19:15:42,578 INFO L134 CoverageAnalysis]: Checked inductivity of 13485 backedges. 0 proven. 5797 refuted. 0 times theorem prover too weak. 7688 trivial. 0 not checked. [2018-12-01 19:15:42,592 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 19:15:42,593 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-12-01 19:15:42,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-12-01 19:15:42,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-12-01 19:15:42,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2084, Invalid=2338, Unknown=0, NotChecked=0, Total=4422 [2018-12-01 19:15:42,593 INFO L87 Difference]: Start difference. First operand 205 states and 271 transitions. Second operand 67 states. [2018-12-01 19:15:44,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 19:15:44,115 INFO L93 Difference]: Finished difference Result 212 states and 279 transitions. [2018-12-01 19:15:44,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-12-01 19:15:44,116 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 447 [2018-12-01 19:15:44,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 19:15:44,116 INFO L225 Difference]: With dead ends: 212 [2018-12-01 19:15:44,117 INFO L226 Difference]: Without dead ends: 208 [2018-12-01 19:15:44,117 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 638 GetRequests, 510 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2015 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=6242, Invalid=10528, Unknown=0, NotChecked=0, Total=16770 [2018-12-01 19:15:44,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2018-12-01 19:15:44,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 208. [2018-12-01 19:15:44,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2018-12-01 19:15:44,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 275 transitions. [2018-12-01 19:15:44,146 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 275 transitions. Word has length 447 [2018-12-01 19:15:44,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 19:15:44,146 INFO L480 AbstractCegarLoop]: Abstraction has 208 states and 275 transitions. [2018-12-01 19:15:44,146 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-12-01 19:15:44,146 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 275 transitions. [2018-12-01 19:15:44,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 455 [2018-12-01 19:15:44,148 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 19:15:44,148 INFO L402 BasicCegarLoop]: trace histogram [64, 64, 63, 63, 63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 19:15:44,148 INFO L423 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 19:15:44,148 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 19:15:44,148 INFO L82 PathProgramCache]: Analyzing trace with hash 252652546, now seen corresponding path program 63 times [2018-12-01 19:15:44,148 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 19:15:44,148 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 19:15:44,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:15:44,149 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 19:15:44,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:15:44,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:15:45,267 INFO L134 CoverageAnalysis]: Checked inductivity of 13923 backedges. 0 proven. 5985 refuted. 0 times theorem prover too weak. 7938 trivial. 0 not checked. [2018-12-01 19:15:45,268 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 19:15:45,268 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/bin-2019/uautomizer/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 19:15:45,273 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-01 19:15:45,474 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2018-12-01 19:15:45,474 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 19:15:45,481 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 19:15:45,573 INFO L134 CoverageAnalysis]: Checked inductivity of 13923 backedges. 0 proven. 5985 refuted. 0 times theorem prover too weak. 7938 trivial. 0 not checked. [2018-12-01 19:15:45,587 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 19:15:45,588 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-12-01 19:15:45,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-12-01 19:15:45,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-12-01 19:15:45,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2149, Invalid=2407, Unknown=0, NotChecked=0, Total=4556 [2018-12-01 19:15:45,589 INFO L87 Difference]: Start difference. First operand 208 states and 275 transitions. Second operand 68 states. [2018-12-01 19:15:47,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 19:15:47,337 INFO L93 Difference]: Finished difference Result 215 states and 283 transitions. [2018-12-01 19:15:47,338 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-12-01 19:15:47,338 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 454 [2018-12-01 19:15:47,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 19:15:47,339 INFO L225 Difference]: With dead ends: 215 [2018-12-01 19:15:47,339 INFO L226 Difference]: Without dead ends: 211 [2018-12-01 19:15:47,340 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 648 GetRequests, 518 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2079 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=6437, Invalid=10855, Unknown=0, NotChecked=0, Total=17292 [2018-12-01 19:15:47,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2018-12-01 19:15:47,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2018-12-01 19:15:47,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2018-12-01 19:15:47,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 279 transitions. [2018-12-01 19:15:47,372 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 279 transitions. Word has length 454 [2018-12-01 19:15:47,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 19:15:47,372 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 279 transitions. [2018-12-01 19:15:47,372 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-12-01 19:15:47,372 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 279 transitions. [2018-12-01 19:15:47,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 462 [2018-12-01 19:15:47,373 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 19:15:47,374 INFO L402 BasicCegarLoop]: trace histogram [65, 65, 64, 64, 64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 19:15:47,374 INFO L423 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 19:15:47,374 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 19:15:47,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1411899933, now seen corresponding path program 64 times [2018-12-01 19:15:47,374 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 19:15:47,374 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 19:15:47,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:15:47,375 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 19:15:47,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:15:47,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:15:48,535 INFO L134 CoverageAnalysis]: Checked inductivity of 14368 backedges. 0 proven. 6176 refuted. 0 times theorem prover too weak. 8192 trivial. 0 not checked. [2018-12-01 19:15:48,536 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 19:15:48,536 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/bin-2019/uautomizer/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 19:15:48,547 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-01 19:15:48,619 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-01 19:15:48,619 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 19:15:48,627 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 19:15:48,721 INFO L134 CoverageAnalysis]: Checked inductivity of 14368 backedges. 0 proven. 6176 refuted. 0 times theorem prover too weak. 8192 trivial. 0 not checked. [2018-12-01 19:15:48,735 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 19:15:48,736 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-12-01 19:15:48,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-12-01 19:15:48,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-12-01 19:15:48,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2215, Invalid=2477, Unknown=0, NotChecked=0, Total=4692 [2018-12-01 19:15:48,736 INFO L87 Difference]: Start difference. First operand 211 states and 279 transitions. Second operand 69 states. [2018-12-01 19:15:50,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 19:15:50,237 INFO L93 Difference]: Finished difference Result 218 states and 287 transitions. [2018-12-01 19:15:50,237 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-12-01 19:15:50,237 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 461 [2018-12-01 19:15:50,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 19:15:50,238 INFO L225 Difference]: With dead ends: 218 [2018-12-01 19:15:50,238 INFO L226 Difference]: Without dead ends: 214 [2018-12-01 19:15:50,239 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 658 GetRequests, 526 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2144 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=6635, Invalid=11187, Unknown=0, NotChecked=0, Total=17822 [2018-12-01 19:15:50,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2018-12-01 19:15:50,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2018-12-01 19:15:50,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2018-12-01 19:15:50,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 283 transitions. [2018-12-01 19:15:50,267 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 283 transitions. Word has length 461 [2018-12-01 19:15:50,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 19:15:50,267 INFO L480 AbstractCegarLoop]: Abstraction has 214 states and 283 transitions. [2018-12-01 19:15:50,267 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-12-01 19:15:50,267 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 283 transitions. [2018-12-01 19:15:50,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 469 [2018-12-01 19:15:50,269 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 19:15:50,269 INFO L402 BasicCegarLoop]: trace histogram [66, 66, 65, 65, 65, 65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 19:15:50,269 INFO L423 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 19:15:50,269 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 19:15:50,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1911198060, now seen corresponding path program 65 times [2018-12-01 19:15:50,269 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 19:15:50,269 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 19:15:50,270 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:15:50,270 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 19:15:50,270 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:15:50,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:15:51,415 INFO L134 CoverageAnalysis]: Checked inductivity of 14820 backedges. 0 proven. 6370 refuted. 0 times theorem prover too weak. 8450 trivial. 0 not checked. [2018-12-01 19:15:51,415 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 19:15:51,415 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/bin-2019/uautomizer/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 19:15:51,423 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-01 19:15:51,651 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2018-12-01 19:15:51,651 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 19:15:51,662 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 19:15:51,765 INFO L134 CoverageAnalysis]: Checked inductivity of 14820 backedges. 0 proven. 6370 refuted. 0 times theorem prover too weak. 8450 trivial. 0 not checked. [2018-12-01 19:15:51,780 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 19:15:51,781 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-12-01 19:15:51,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-12-01 19:15:51,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-12-01 19:15:51,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2282, Invalid=2548, Unknown=0, NotChecked=0, Total=4830 [2018-12-01 19:15:51,781 INFO L87 Difference]: Start difference. First operand 214 states and 283 transitions. Second operand 70 states. [2018-12-01 19:15:53,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 19:15:53,356 INFO L93 Difference]: Finished difference Result 221 states and 291 transitions. [2018-12-01 19:15:53,356 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-12-01 19:15:53,356 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 468 [2018-12-01 19:15:53,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 19:15:53,357 INFO L225 Difference]: With dead ends: 221 [2018-12-01 19:15:53,357 INFO L226 Difference]: Without dead ends: 217 [2018-12-01 19:15:53,357 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 668 GetRequests, 534 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2210 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=6836, Invalid=11524, Unknown=0, NotChecked=0, Total=18360 [2018-12-01 19:15:53,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2018-12-01 19:15:53,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 217. [2018-12-01 19:15:53,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2018-12-01 19:15:53,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 287 transitions. [2018-12-01 19:15:53,387 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 287 transitions. Word has length 468 [2018-12-01 19:15:53,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 19:15:53,387 INFO L480 AbstractCegarLoop]: Abstraction has 217 states and 287 transitions. [2018-12-01 19:15:53,387 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-12-01 19:15:53,387 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 287 transitions. [2018-12-01 19:15:53,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2018-12-01 19:15:53,388 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 19:15:53,388 INFO L402 BasicCegarLoop]: trace histogram [67, 67, 66, 66, 66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 19:15:53,388 INFO L423 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 19:15:53,389 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 19:15:53,389 INFO L82 PathProgramCache]: Analyzing trace with hash -495672013, now seen corresponding path program 66 times [2018-12-01 19:15:53,389 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 19:15:53,389 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 19:15:53,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:15:53,389 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 19:15:53,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:15:53,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:15:54,582 INFO L134 CoverageAnalysis]: Checked inductivity of 15279 backedges. 0 proven. 6567 refuted. 0 times theorem prover too weak. 8712 trivial. 0 not checked. [2018-12-01 19:15:54,583 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 19:15:54,583 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/bin-2019/uautomizer/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 19:15:54,595 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-01 19:15:54,794 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2018-12-01 19:15:54,794 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 19:15:54,802 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 19:15:54,902 INFO L134 CoverageAnalysis]: Checked inductivity of 15279 backedges. 0 proven. 6567 refuted. 0 times theorem prover too weak. 8712 trivial. 0 not checked. [2018-12-01 19:15:54,917 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 19:15:54,917 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-12-01 19:15:54,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-12-01 19:15:54,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-12-01 19:15:54,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2350, Invalid=2620, Unknown=0, NotChecked=0, Total=4970 [2018-12-01 19:15:54,918 INFO L87 Difference]: Start difference. First operand 217 states and 287 transitions. Second operand 71 states. [2018-12-01 19:15:56,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 19:15:56,604 INFO L93 Difference]: Finished difference Result 224 states and 295 transitions. [2018-12-01 19:15:56,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-12-01 19:15:56,604 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 475 [2018-12-01 19:15:56,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 19:15:56,605 INFO L225 Difference]: With dead ends: 224 [2018-12-01 19:15:56,605 INFO L226 Difference]: Without dead ends: 220 [2018-12-01 19:15:56,606 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 678 GetRequests, 542 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2277 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=7040, Invalid=11866, Unknown=0, NotChecked=0, Total=18906 [2018-12-01 19:15:56,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2018-12-01 19:15:56,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 220. [2018-12-01 19:15:56,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2018-12-01 19:15:56,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 291 transitions. [2018-12-01 19:15:56,637 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 291 transitions. Word has length 475 [2018-12-01 19:15:56,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 19:15:56,638 INFO L480 AbstractCegarLoop]: Abstraction has 220 states and 291 transitions. [2018-12-01 19:15:56,638 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-12-01 19:15:56,638 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 291 transitions. [2018-12-01 19:15:56,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2018-12-01 19:15:56,639 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 19:15:56,639 INFO L402 BasicCegarLoop]: trace histogram [68, 68, 67, 67, 67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 19:15:56,639 INFO L423 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 19:15:56,639 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 19:15:56,639 INFO L82 PathProgramCache]: Analyzing trace with hash -785023530, now seen corresponding path program 67 times [2018-12-01 19:15:56,639 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 19:15:56,639 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 19:15:56,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:15:56,640 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 19:15:56,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:15:56,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:15:57,917 INFO L134 CoverageAnalysis]: Checked inductivity of 15745 backedges. 0 proven. 6767 refuted. 0 times theorem prover too weak. 8978 trivial. 0 not checked. [2018-12-01 19:15:57,917 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 19:15:57,917 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/bin-2019/uautomizer/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 19:15:57,923 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 19:15:57,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:15:58,003 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 19:15:58,111 INFO L134 CoverageAnalysis]: Checked inductivity of 15745 backedges. 0 proven. 6767 refuted. 0 times theorem prover too weak. 8978 trivial. 0 not checked. [2018-12-01 19:15:58,125 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 19:15:58,126 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-12-01 19:15:58,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-12-01 19:15:58,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-12-01 19:15:58,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2419, Invalid=2693, Unknown=0, NotChecked=0, Total=5112 [2018-12-01 19:15:58,126 INFO L87 Difference]: Start difference. First operand 220 states and 291 transitions. Second operand 72 states. [2018-12-01 19:15:59,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 19:15:59,835 INFO L93 Difference]: Finished difference Result 227 states and 299 transitions. [2018-12-01 19:15:59,835 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-12-01 19:15:59,835 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 482 [2018-12-01 19:15:59,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 19:15:59,836 INFO L225 Difference]: With dead ends: 227 [2018-12-01 19:15:59,836 INFO L226 Difference]: Without dead ends: 223 [2018-12-01 19:15:59,837 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 688 GetRequests, 550 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2345 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=7247, Invalid=12213, Unknown=0, NotChecked=0, Total=19460 [2018-12-01 19:15:59,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2018-12-01 19:15:59,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2018-12-01 19:15:59,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2018-12-01 19:15:59,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 295 transitions. [2018-12-01 19:15:59,871 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 295 transitions. Word has length 482 [2018-12-01 19:15:59,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 19:15:59,871 INFO L480 AbstractCegarLoop]: Abstraction has 223 states and 295 transitions. [2018-12-01 19:15:59,871 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-12-01 19:15:59,871 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 295 transitions. [2018-12-01 19:15:59,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2018-12-01 19:15:59,872 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 19:15:59,872 INFO L402 BasicCegarLoop]: trace histogram [69, 69, 68, 68, 68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 19:15:59,873 INFO L423 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 19:15:59,873 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 19:15:59,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1700147529, now seen corresponding path program 68 times [2018-12-01 19:15:59,873 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 19:15:59,873 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 19:15:59,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:15:59,873 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 19:15:59,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:15:59,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:16:01,140 INFO L134 CoverageAnalysis]: Checked inductivity of 16218 backedges. 0 proven. 6970 refuted. 0 times theorem prover too weak. 9248 trivial. 0 not checked. [2018-12-01 19:16:01,140 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 19:16:01,140 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/bin-2019/uautomizer/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 19:16:01,145 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-01 19:16:01,218 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-01 19:16:01,218 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 19:16:01,224 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 19:16:01,337 INFO L134 CoverageAnalysis]: Checked inductivity of 16218 backedges. 0 proven. 6970 refuted. 0 times theorem prover too weak. 9248 trivial. 0 not checked. [2018-12-01 19:16:01,351 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 19:16:01,351 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-12-01 19:16:01,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-12-01 19:16:01,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-12-01 19:16:01,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2489, Invalid=2767, Unknown=0, NotChecked=0, Total=5256 [2018-12-01 19:16:01,352 INFO L87 Difference]: Start difference. First operand 223 states and 295 transitions. Second operand 73 states. [2018-12-01 19:16:03,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 19:16:03,293 INFO L93 Difference]: Finished difference Result 230 states and 303 transitions. [2018-12-01 19:16:03,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-12-01 19:16:03,294 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 489 [2018-12-01 19:16:03,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 19:16:03,295 INFO L225 Difference]: With dead ends: 230 [2018-12-01 19:16:03,295 INFO L226 Difference]: Without dead ends: 226 [2018-12-01 19:16:03,296 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 698 GetRequests, 558 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2414 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=7457, Invalid=12565, Unknown=0, NotChecked=0, Total=20022 [2018-12-01 19:16:03,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2018-12-01 19:16:03,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 226. [2018-12-01 19:16:03,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2018-12-01 19:16:03,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 299 transitions. [2018-12-01 19:16:03,338 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 299 transitions. Word has length 489 [2018-12-01 19:16:03,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 19:16:03,338 INFO L480 AbstractCegarLoop]: Abstraction has 226 states and 299 transitions. [2018-12-01 19:16:03,338 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-12-01 19:16:03,338 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 299 transitions. [2018-12-01 19:16:03,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2018-12-01 19:16:03,340 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 19:16:03,340 INFO L402 BasicCegarLoop]: trace histogram [70, 70, 69, 69, 69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 19:16:03,340 INFO L423 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 19:16:03,340 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 19:16:03,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1879092928, now seen corresponding path program 69 times [2018-12-01 19:16:03,340 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 19:16:03,340 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 19:16:03,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:16:03,341 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 19:16:03,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:16:03,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:16:04,624 INFO L134 CoverageAnalysis]: Checked inductivity of 16698 backedges. 0 proven. 7176 refuted. 0 times theorem prover too weak. 9522 trivial. 0 not checked. [2018-12-01 19:16:04,625 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 19:16:04,625 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/bin-2019/uautomizer/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 19:16:04,636 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-01 19:16:04,858 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2018-12-01 19:16:04,858 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 19:16:04,866 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 19:16:04,976 INFO L134 CoverageAnalysis]: Checked inductivity of 16698 backedges. 0 proven. 7176 refuted. 0 times theorem prover too weak. 9522 trivial. 0 not checked. [2018-12-01 19:16:04,991 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 19:16:04,992 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-12-01 19:16:04,992 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-12-01 19:16:04,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-12-01 19:16:04,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2560, Invalid=2842, Unknown=0, NotChecked=0, Total=5402 [2018-12-01 19:16:04,992 INFO L87 Difference]: Start difference. First operand 226 states and 299 transitions. Second operand 74 states. [2018-12-01 19:16:07,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 19:16:07,281 INFO L93 Difference]: Finished difference Result 233 states and 307 transitions. [2018-12-01 19:16:07,281 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-12-01 19:16:07,281 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 496 [2018-12-01 19:16:07,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 19:16:07,283 INFO L225 Difference]: With dead ends: 233 [2018-12-01 19:16:07,283 INFO L226 Difference]: Without dead ends: 229 [2018-12-01 19:16:07,285 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 708 GetRequests, 566 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2484 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=7670, Invalid=12922, Unknown=0, NotChecked=0, Total=20592 [2018-12-01 19:16:07,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2018-12-01 19:16:07,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 229. [2018-12-01 19:16:07,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2018-12-01 19:16:07,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 303 transitions. [2018-12-01 19:16:07,328 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 303 transitions. Word has length 496 [2018-12-01 19:16:07,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 19:16:07,329 INFO L480 AbstractCegarLoop]: Abstraction has 229 states and 303 transitions. [2018-12-01 19:16:07,329 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-12-01 19:16:07,329 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 303 transitions. [2018-12-01 19:16:07,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 504 [2018-12-01 19:16:07,331 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 19:16:07,332 INFO L402 BasicCegarLoop]: trace histogram [71, 71, 70, 70, 70, 70, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 19:16:07,332 INFO L423 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 19:16:07,332 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 19:16:07,332 INFO L82 PathProgramCache]: Analyzing trace with hash 55387743, now seen corresponding path program 70 times [2018-12-01 19:16:07,332 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 19:16:07,332 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 19:16:07,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:16:07,333 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 19:16:07,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:16:07,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:16:08,737 INFO L134 CoverageAnalysis]: Checked inductivity of 17185 backedges. 0 proven. 7385 refuted. 0 times theorem prover too weak. 9800 trivial. 0 not checked. [2018-12-01 19:16:08,737 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 19:16:08,737 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/bin-2019/uautomizer/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 19:16:08,742 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-01 19:16:08,826 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-01 19:16:08,826 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 19:16:08,835 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 19:16:08,945 INFO L134 CoverageAnalysis]: Checked inductivity of 17185 backedges. 0 proven. 7385 refuted. 0 times theorem prover too weak. 9800 trivial. 0 not checked. [2018-12-01 19:16:08,960 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 19:16:08,960 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-12-01 19:16:08,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-12-01 19:16:08,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-12-01 19:16:08,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2632, Invalid=2918, Unknown=0, NotChecked=0, Total=5550 [2018-12-01 19:16:08,961 INFO L87 Difference]: Start difference. First operand 229 states and 303 transitions. Second operand 75 states. [2018-12-01 19:16:10,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 19:16:10,835 INFO L93 Difference]: Finished difference Result 236 states and 311 transitions. [2018-12-01 19:16:10,836 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-12-01 19:16:10,836 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 503 [2018-12-01 19:16:10,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 19:16:10,837 INFO L225 Difference]: With dead ends: 236 [2018-12-01 19:16:10,837 INFO L226 Difference]: Without dead ends: 232 [2018-12-01 19:16:10,838 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 718 GetRequests, 574 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2555 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=7886, Invalid=13284, Unknown=0, NotChecked=0, Total=21170 [2018-12-01 19:16:10,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2018-12-01 19:16:10,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 232. [2018-12-01 19:16:10,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2018-12-01 19:16:10,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 307 transitions. [2018-12-01 19:16:10,875 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 307 transitions. Word has length 503 [2018-12-01 19:16:10,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 19:16:10,876 INFO L480 AbstractCegarLoop]: Abstraction has 232 states and 307 transitions. [2018-12-01 19:16:10,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-12-01 19:16:10,876 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 307 transitions. [2018-12-01 19:16:10,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 511 [2018-12-01 19:16:10,878 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 19:16:10,879 INFO L402 BasicCegarLoop]: trace histogram [72, 72, 71, 71, 71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 19:16:10,879 INFO L423 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 19:16:10,879 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 19:16:10,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1497928790, now seen corresponding path program 71 times [2018-12-01 19:16:10,879 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 19:16:10,879 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 19:16:10,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:16:10,880 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 19:16:10,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:16:10,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:16:12,233 INFO L134 CoverageAnalysis]: Checked inductivity of 17679 backedges. 0 proven. 7597 refuted. 0 times theorem prover too weak. 10082 trivial. 0 not checked. [2018-12-01 19:16:12,233 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 19:16:12,233 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/bin-2019/uautomizer/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 19:16:12,238 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-01 19:16:12,518 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2018-12-01 19:16:12,519 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 19:16:12,532 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 19:16:12,652 INFO L134 CoverageAnalysis]: Checked inductivity of 17679 backedges. 0 proven. 7597 refuted. 0 times theorem prover too weak. 10082 trivial. 0 not checked. [2018-12-01 19:16:12,667 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 19:16:12,667 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-12-01 19:16:12,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-12-01 19:16:12,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-12-01 19:16:12,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2705, Invalid=2995, Unknown=0, NotChecked=0, Total=5700 [2018-12-01 19:16:12,668 INFO L87 Difference]: Start difference. First operand 232 states and 307 transitions. Second operand 76 states. [2018-12-01 19:16:14,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 19:16:14,777 INFO L93 Difference]: Finished difference Result 239 states and 315 transitions. [2018-12-01 19:16:14,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-12-01 19:16:14,777 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 510 [2018-12-01 19:16:14,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 19:16:14,778 INFO L225 Difference]: With dead ends: 239 [2018-12-01 19:16:14,778 INFO L226 Difference]: Without dead ends: 235 [2018-12-01 19:16:14,779 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 728 GetRequests, 582 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2627 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=8105, Invalid=13651, Unknown=0, NotChecked=0, Total=21756 [2018-12-01 19:16:14,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2018-12-01 19:16:14,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235. [2018-12-01 19:16:14,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2018-12-01 19:16:14,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 311 transitions. [2018-12-01 19:16:14,815 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 311 transitions. Word has length 510 [2018-12-01 19:16:14,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 19:16:14,815 INFO L480 AbstractCegarLoop]: Abstraction has 235 states and 311 transitions. [2018-12-01 19:16:14,815 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-12-01 19:16:14,815 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 311 transitions. [2018-12-01 19:16:14,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 518 [2018-12-01 19:16:14,816 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 19:16:14,817 INFO L402 BasicCegarLoop]: trace histogram [73, 73, 72, 72, 72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 19:16:14,817 INFO L423 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 19:16:14,817 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 19:16:14,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1551508597, now seen corresponding path program 72 times [2018-12-01 19:16:14,817 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 19:16:14,817 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 19:16:14,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:16:14,817 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 19:16:14,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:16:14,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:16:16,228 INFO L134 CoverageAnalysis]: Checked inductivity of 18180 backedges. 0 proven. 7812 refuted. 0 times theorem prover too weak. 10368 trivial. 0 not checked. [2018-12-01 19:16:16,229 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 19:16:16,229 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/bin-2019/uautomizer/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 19:16:16,234 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-01 19:16:16,464 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2018-12-01 19:16:16,464 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 19:16:16,471 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 19:16:16,593 INFO L134 CoverageAnalysis]: Checked inductivity of 18180 backedges. 0 proven. 7812 refuted. 0 times theorem prover too weak. 10368 trivial. 0 not checked. [2018-12-01 19:16:16,608 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 19:16:16,608 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-12-01 19:16:16,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-12-01 19:16:16,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-12-01 19:16:16,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2779, Invalid=3073, Unknown=0, NotChecked=0, Total=5852 [2018-12-01 19:16:16,609 INFO L87 Difference]: Start difference. First operand 235 states and 311 transitions. Second operand 77 states. [2018-12-01 19:16:18,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 19:16:18,711 INFO L93 Difference]: Finished difference Result 242 states and 319 transitions. [2018-12-01 19:16:18,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-12-01 19:16:18,711 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 517 [2018-12-01 19:16:18,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 19:16:18,712 INFO L225 Difference]: With dead ends: 242 [2018-12-01 19:16:18,712 INFO L226 Difference]: Without dead ends: 238 [2018-12-01 19:16:18,713 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 738 GetRequests, 590 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2700 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=8327, Invalid=14023, Unknown=0, NotChecked=0, Total=22350 [2018-12-01 19:16:18,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2018-12-01 19:16:18,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 238. [2018-12-01 19:16:18,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2018-12-01 19:16:18,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 315 transitions. [2018-12-01 19:16:18,751 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 315 transitions. Word has length 517 [2018-12-01 19:16:18,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 19:16:18,751 INFO L480 AbstractCegarLoop]: Abstraction has 238 states and 315 transitions. [2018-12-01 19:16:18,751 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-12-01 19:16:18,751 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 315 transitions. [2018-12-01 19:16:18,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 525 [2018-12-01 19:16:18,753 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 19:16:18,753 INFO L402 BasicCegarLoop]: trace histogram [74, 74, 73, 73, 73, 73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 19:16:18,753 INFO L423 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 19:16:18,753 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 19:16:18,753 INFO L82 PathProgramCache]: Analyzing trace with hash -986895084, now seen corresponding path program 73 times [2018-12-01 19:16:18,753 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 19:16:18,753 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 19:16:18,754 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:16:18,754 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 19:16:18,754 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:16:18,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:16:20,186 INFO L134 CoverageAnalysis]: Checked inductivity of 18688 backedges. 0 proven. 8030 refuted. 0 times theorem prover too weak. 10658 trivial. 0 not checked. [2018-12-01 19:16:20,186 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 19:16:20,186 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/bin-2019/uautomizer/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 19:16:20,192 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 19:16:20,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:16:20,279 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 19:16:20,398 INFO L134 CoverageAnalysis]: Checked inductivity of 18688 backedges. 0 proven. 8030 refuted. 0 times theorem prover too weak. 10658 trivial. 0 not checked. [2018-12-01 19:16:20,413 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 19:16:20,413 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-12-01 19:16:20,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-12-01 19:16:20,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-12-01 19:16:20,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2854, Invalid=3152, Unknown=0, NotChecked=0, Total=6006 [2018-12-01 19:16:20,415 INFO L87 Difference]: Start difference. First operand 238 states and 315 transitions. Second operand 78 states. [2018-12-01 19:16:22,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 19:16:22,663 INFO L93 Difference]: Finished difference Result 245 states and 323 transitions. [2018-12-01 19:16:22,663 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-12-01 19:16:22,663 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 524 [2018-12-01 19:16:22,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 19:16:22,664 INFO L225 Difference]: With dead ends: 245 [2018-12-01 19:16:22,664 INFO L226 Difference]: Without dead ends: 241 [2018-12-01 19:16:22,664 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 748 GetRequests, 598 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2774 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=8552, Invalid=14400, Unknown=0, NotChecked=0, Total=22952 [2018-12-01 19:16:22,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2018-12-01 19:16:22,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 241. [2018-12-01 19:16:22,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2018-12-01 19:16:22,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 319 transitions. [2018-12-01 19:16:22,703 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 319 transitions. Word has length 524 [2018-12-01 19:16:22,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 19:16:22,703 INFO L480 AbstractCegarLoop]: Abstraction has 241 states and 319 transitions. [2018-12-01 19:16:22,703 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-12-01 19:16:22,703 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 319 transitions. [2018-12-01 19:16:22,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 532 [2018-12-01 19:16:22,705 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 19:16:22,705 INFO L402 BasicCegarLoop]: trace histogram [75, 75, 74, 74, 74, 74, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 19:16:22,705 INFO L423 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 19:16:22,705 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 19:16:22,705 INFO L82 PathProgramCache]: Analyzing trace with hash -392311925, now seen corresponding path program 74 times [2018-12-01 19:16:22,705 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 19:16:22,705 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 19:16:22,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:16:22,706 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 19:16:22,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:16:22,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:16:24,165 INFO L134 CoverageAnalysis]: Checked inductivity of 19203 backedges. 0 proven. 8251 refuted. 0 times theorem prover too weak. 10952 trivial. 0 not checked. [2018-12-01 19:16:24,166 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 19:16:24,166 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/bin-2019/uautomizer/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 19:16:24,171 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-01 19:16:24,257 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-01 19:16:24,257 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 19:16:24,263 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 19:16:24,385 INFO L134 CoverageAnalysis]: Checked inductivity of 19203 backedges. 0 proven. 8251 refuted. 0 times theorem prover too weak. 10952 trivial. 0 not checked. [2018-12-01 19:16:24,400 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 19:16:24,400 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-12-01 19:16:24,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-12-01 19:16:24,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-12-01 19:16:24,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2930, Invalid=3232, Unknown=0, NotChecked=0, Total=6162 [2018-12-01 19:16:24,401 INFO L87 Difference]: Start difference. First operand 241 states and 319 transitions. Second operand 79 states. [2018-12-01 19:16:26,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 19:16:26,480 INFO L93 Difference]: Finished difference Result 248 states and 327 transitions. [2018-12-01 19:16:26,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-12-01 19:16:26,481 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 531 [2018-12-01 19:16:26,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 19:16:26,481 INFO L225 Difference]: With dead ends: 248 [2018-12-01 19:16:26,482 INFO L226 Difference]: Without dead ends: 244 [2018-12-01 19:16:26,482 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 758 GetRequests, 606 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2849 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=8780, Invalid=14782, Unknown=0, NotChecked=0, Total=23562 [2018-12-01 19:16:26,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2018-12-01 19:16:26,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 244. [2018-12-01 19:16:26,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2018-12-01 19:16:26,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 323 transitions. [2018-12-01 19:16:26,524 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 323 transitions. Word has length 531 [2018-12-01 19:16:26,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 19:16:26,524 INFO L480 AbstractCegarLoop]: Abstraction has 244 states and 323 transitions. [2018-12-01 19:16:26,524 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-12-01 19:16:26,524 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 323 transitions. [2018-12-01 19:16:26,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 539 [2018-12-01 19:16:26,526 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 19:16:26,526 INFO L402 BasicCegarLoop]: trace histogram [76, 76, 75, 75, 75, 75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 19:16:26,526 INFO L423 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 19:16:26,526 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 19:16:26,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1955591550, now seen corresponding path program 75 times [2018-12-01 19:16:26,526 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 19:16:26,526 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 19:16:26,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:16:26,527 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 19:16:26,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:16:26,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:16:28,060 INFO L134 CoverageAnalysis]: Checked inductivity of 19725 backedges. 0 proven. 8475 refuted. 0 times theorem prover too weak. 11250 trivial. 0 not checked. [2018-12-01 19:16:28,060 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 19:16:28,060 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/bin-2019/uautomizer/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 19:16:28,065 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-01 19:16:28,323 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) [2018-12-01 19:16:28,324 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 19:16:28,332 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 19:16:28,467 INFO L134 CoverageAnalysis]: Checked inductivity of 19725 backedges. 0 proven. 8475 refuted. 0 times theorem prover too weak. 11250 trivial. 0 not checked. [2018-12-01 19:16:28,483 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 19:16:28,483 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-12-01 19:16:28,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-12-01 19:16:28,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-12-01 19:16:28,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3007, Invalid=3313, Unknown=0, NotChecked=0, Total=6320 [2018-12-01 19:16:28,484 INFO L87 Difference]: Start difference. First operand 244 states and 323 transitions. Second operand 80 states. [2018-12-01 19:16:30,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 19:16:30,586 INFO L93 Difference]: Finished difference Result 251 states and 331 transitions. [2018-12-01 19:16:30,587 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-12-01 19:16:30,587 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 538 [2018-12-01 19:16:30,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 19:16:30,588 INFO L225 Difference]: With dead ends: 251 [2018-12-01 19:16:30,588 INFO L226 Difference]: Without dead ends: 247 [2018-12-01 19:16:30,588 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 768 GetRequests, 614 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2925 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=9011, Invalid=15169, Unknown=0, NotChecked=0, Total=24180 [2018-12-01 19:16:30,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2018-12-01 19:16:30,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 247. [2018-12-01 19:16:30,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2018-12-01 19:16:30,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 327 transitions. [2018-12-01 19:16:30,630 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 327 transitions. Word has length 538 [2018-12-01 19:16:30,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 19:16:30,630 INFO L480 AbstractCegarLoop]: Abstraction has 247 states and 327 transitions. [2018-12-01 19:16:30,630 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-12-01 19:16:30,630 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 327 transitions. [2018-12-01 19:16:30,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 546 [2018-12-01 19:16:30,632 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 19:16:30,632 INFO L402 BasicCegarLoop]: trace histogram [77, 77, 76, 76, 76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 19:16:30,632 INFO L423 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 19:16:30,632 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 19:16:30,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1427684257, now seen corresponding path program 76 times [2018-12-01 19:16:30,632 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 19:16:30,632 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 19:16:30,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:16:30,633 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 19:16:30,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:16:30,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:16:32,198 INFO L134 CoverageAnalysis]: Checked inductivity of 20254 backedges. 0 proven. 8702 refuted. 0 times theorem prover too weak. 11552 trivial. 0 not checked. [2018-12-01 19:16:32,199 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 19:16:32,199 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/bin-2019/uautomizer/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 19:16:32,205 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-01 19:16:32,289 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-01 19:16:32,289 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 19:16:32,299 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 19:16:32,426 INFO L134 CoverageAnalysis]: Checked inductivity of 20254 backedges. 0 proven. 8702 refuted. 0 times theorem prover too weak. 11552 trivial. 0 not checked. [2018-12-01 19:16:32,441 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 19:16:32,441 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-12-01 19:16:32,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-12-01 19:16:32,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-12-01 19:16:32,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3085, Invalid=3395, Unknown=0, NotChecked=0, Total=6480 [2018-12-01 19:16:32,442 INFO L87 Difference]: Start difference. First operand 247 states and 327 transitions. Second operand 81 states. [2018-12-01 19:16:34,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 19:16:34,631 INFO L93 Difference]: Finished difference Result 254 states and 335 transitions. [2018-12-01 19:16:34,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-12-01 19:16:34,631 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 545 [2018-12-01 19:16:34,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 19:16:34,632 INFO L225 Difference]: With dead ends: 254 [2018-12-01 19:16:34,632 INFO L226 Difference]: Without dead ends: 250 [2018-12-01 19:16:34,633 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 778 GetRequests, 622 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3002 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=9245, Invalid=15561, Unknown=0, NotChecked=0, Total=24806 [2018-12-01 19:16:34,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2018-12-01 19:16:34,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 250. [2018-12-01 19:16:34,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2018-12-01 19:16:34,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 331 transitions. [2018-12-01 19:16:34,677 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 331 transitions. Word has length 545 [2018-12-01 19:16:34,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 19:16:34,677 INFO L480 AbstractCegarLoop]: Abstraction has 250 states and 331 transitions. [2018-12-01 19:16:34,677 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-12-01 19:16:34,677 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 331 transitions. [2018-12-01 19:16:34,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 553 [2018-12-01 19:16:34,679 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 19:16:34,679 INFO L402 BasicCegarLoop]: trace histogram [78, 78, 77, 77, 77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 19:16:34,679 INFO L423 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 19:16:34,679 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 19:16:34,679 INFO L82 PathProgramCache]: Analyzing trace with hash 963585256, now seen corresponding path program 77 times [2018-12-01 19:16:34,679 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 19:16:34,679 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 19:16:34,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:16:34,680 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 19:16:34,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:16:34,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:16:36,311 INFO L134 CoverageAnalysis]: Checked inductivity of 20790 backedges. 0 proven. 8932 refuted. 0 times theorem prover too weak. 11858 trivial. 0 not checked. [2018-12-01 19:16:36,311 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 19:16:36,311 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/bin-2019/uautomizer/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 19:16:36,317 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-01 19:16:36,635 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2018-12-01 19:16:36,636 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 19:16:36,650 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 19:16:36,781 INFO L134 CoverageAnalysis]: Checked inductivity of 20790 backedges. 0 proven. 8932 refuted. 0 times theorem prover too weak. 11858 trivial. 0 not checked. [2018-12-01 19:16:36,796 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 19:16:36,797 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2018-12-01 19:16:36,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-12-01 19:16:36,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-12-01 19:16:36,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3164, Invalid=3478, Unknown=0, NotChecked=0, Total=6642 [2018-12-01 19:16:36,798 INFO L87 Difference]: Start difference. First operand 250 states and 331 transitions. Second operand 82 states. [2018-12-01 19:16:39,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 19:16:39,226 INFO L93 Difference]: Finished difference Result 257 states and 339 transitions. [2018-12-01 19:16:39,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-12-01 19:16:39,226 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 552 [2018-12-01 19:16:39,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 19:16:39,227 INFO L225 Difference]: With dead ends: 257 [2018-12-01 19:16:39,227 INFO L226 Difference]: Without dead ends: 253 [2018-12-01 19:16:39,228 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 788 GetRequests, 630 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3080 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=9482, Invalid=15958, Unknown=0, NotChecked=0, Total=25440 [2018-12-01 19:16:39,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2018-12-01 19:16:39,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 253. [2018-12-01 19:16:39,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2018-12-01 19:16:39,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 335 transitions. [2018-12-01 19:16:39,275 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 335 transitions. Word has length 552 [2018-12-01 19:16:39,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 19:16:39,275 INFO L480 AbstractCegarLoop]: Abstraction has 253 states and 335 transitions. [2018-12-01 19:16:39,275 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-12-01 19:16:39,275 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 335 transitions. [2018-12-01 19:16:39,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 560 [2018-12-01 19:16:39,277 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 19:16:39,277 INFO L402 BasicCegarLoop]: trace histogram [79, 79, 78, 78, 78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 19:16:39,277 INFO L423 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 19:16:39,277 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 19:16:39,277 INFO L82 PathProgramCache]: Analyzing trace with hash -487877449, now seen corresponding path program 78 times [2018-12-01 19:16:39,277 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 19:16:39,277 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 19:16:39,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:16:39,278 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 19:16:39,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:16:39,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:16:40,917 INFO L134 CoverageAnalysis]: Checked inductivity of 21333 backedges. 0 proven. 9165 refuted. 0 times theorem prover too weak. 12168 trivial. 0 not checked. [2018-12-01 19:16:40,917 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 19:16:40,917 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/bin-2019/uautomizer/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 19:16:40,924 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-01 19:16:41,188 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2018-12-01 19:16:41,188 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 19:16:41,198 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 19:16:41,340 INFO L134 CoverageAnalysis]: Checked inductivity of 21333 backedges. 0 proven. 9165 refuted. 0 times theorem prover too weak. 12168 trivial. 0 not checked. [2018-12-01 19:16:41,355 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 19:16:41,355 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-12-01 19:16:41,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-12-01 19:16:41,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-12-01 19:16:41,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3244, Invalid=3562, Unknown=0, NotChecked=0, Total=6806 [2018-12-01 19:16:41,356 INFO L87 Difference]: Start difference. First operand 253 states and 335 transitions. Second operand 83 states. [2018-12-01 19:16:43,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 19:16:43,873 INFO L93 Difference]: Finished difference Result 260 states and 343 transitions. [2018-12-01 19:16:43,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-12-01 19:16:43,873 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 559 [2018-12-01 19:16:43,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 19:16:43,874 INFO L225 Difference]: With dead ends: 260 [2018-12-01 19:16:43,874 INFO L226 Difference]: Without dead ends: 256 [2018-12-01 19:16:43,875 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 798 GetRequests, 638 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3159 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=9722, Invalid=16360, Unknown=0, NotChecked=0, Total=26082 [2018-12-01 19:16:43,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2018-12-01 19:16:43,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 256. [2018-12-01 19:16:43,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2018-12-01 19:16:43,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 339 transitions. [2018-12-01 19:16:43,921 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 339 transitions. Word has length 559 [2018-12-01 19:16:43,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 19:16:43,922 INFO L480 AbstractCegarLoop]: Abstraction has 256 states and 339 transitions. [2018-12-01 19:16:43,922 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-12-01 19:16:43,922 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 339 transitions. [2018-12-01 19:16:43,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 567 [2018-12-01 19:16:43,923 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 19:16:43,924 INFO L402 BasicCegarLoop]: trace histogram [80, 80, 79, 79, 79, 79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 19:16:43,924 INFO L423 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 19:16:43,924 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 19:16:43,924 INFO L82 PathProgramCache]: Analyzing trace with hash -1246094510, now seen corresponding path program 79 times [2018-12-01 19:16:43,924 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 19:16:43,924 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 19:16:43,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:16:43,924 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 19:16:43,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:16:43,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:16:45,635 INFO L134 CoverageAnalysis]: Checked inductivity of 21883 backedges. 0 proven. 9401 refuted. 0 times theorem prover too weak. 12482 trivial. 0 not checked. [2018-12-01 19:16:45,636 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 19:16:45,636 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/bin-2019/uautomizer/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 19:16:45,641 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 19:16:45,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:16:45,728 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 19:16:45,865 INFO L134 CoverageAnalysis]: Checked inductivity of 21883 backedges. 0 proven. 9401 refuted. 0 times theorem prover too weak. 12482 trivial. 0 not checked. [2018-12-01 19:16:45,886 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 19:16:45,886 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-12-01 19:16:45,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-12-01 19:16:45,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-12-01 19:16:45,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3325, Invalid=3647, Unknown=0, NotChecked=0, Total=6972 [2018-12-01 19:16:45,887 INFO L87 Difference]: Start difference. First operand 256 states and 339 transitions. Second operand 84 states. [2018-12-01 19:16:48,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 19:16:48,478 INFO L93 Difference]: Finished difference Result 263 states and 347 transitions. [2018-12-01 19:16:48,479 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-12-01 19:16:48,479 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 566 [2018-12-01 19:16:48,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 19:16:48,480 INFO L225 Difference]: With dead ends: 263 [2018-12-01 19:16:48,480 INFO L226 Difference]: Without dead ends: 259 [2018-12-01 19:16:48,480 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 808 GetRequests, 646 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3239 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=9965, Invalid=16767, Unknown=0, NotChecked=0, Total=26732 [2018-12-01 19:16:48,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2018-12-01 19:16:48,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 259. [2018-12-01 19:16:48,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2018-12-01 19:16:48,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 343 transitions. [2018-12-01 19:16:48,528 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 343 transitions. Word has length 566 [2018-12-01 19:16:48,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 19:16:48,528 INFO L480 AbstractCegarLoop]: Abstraction has 259 states and 343 transitions. [2018-12-01 19:16:48,528 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-12-01 19:16:48,528 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 343 transitions. [2018-12-01 19:16:48,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 574 [2018-12-01 19:16:48,530 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 19:16:48,530 INFO L402 BasicCegarLoop]: trace histogram [81, 81, 80, 80, 80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 19:16:48,530 INFO L423 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 19:16:48,530 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 19:16:48,531 INFO L82 PathProgramCache]: Analyzing trace with hash -994642227, now seen corresponding path program 80 times [2018-12-01 19:16:48,531 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 19:16:48,531 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 19:16:48,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:16:48,531 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 19:16:48,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:16:48,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:16:50,286 INFO L134 CoverageAnalysis]: Checked inductivity of 22440 backedges. 0 proven. 9640 refuted. 0 times theorem prover too weak. 12800 trivial. 0 not checked. [2018-12-01 19:16:50,286 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 19:16:50,286 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/bin-2019/uautomizer/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 19:16:50,292 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-01 19:16:50,376 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-01 19:16:50,376 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 19:16:50,383 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 19:16:50,528 INFO L134 CoverageAnalysis]: Checked inductivity of 22440 backedges. 0 proven. 9640 refuted. 0 times theorem prover too weak. 12800 trivial. 0 not checked. [2018-12-01 19:16:50,543 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 19:16:50,543 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-12-01 19:16:50,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-12-01 19:16:50,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-12-01 19:16:50,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3407, Invalid=3733, Unknown=0, NotChecked=0, Total=7140 [2018-12-01 19:16:50,544 INFO L87 Difference]: Start difference. First operand 259 states and 343 transitions. Second operand 85 states. [2018-12-01 19:16:53,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 19:16:53,064 INFO L93 Difference]: Finished difference Result 266 states and 351 transitions. [2018-12-01 19:16:53,064 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-12-01 19:16:53,064 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 573 [2018-12-01 19:16:53,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 19:16:53,065 INFO L225 Difference]: With dead ends: 266 [2018-12-01 19:16:53,065 INFO L226 Difference]: Without dead ends: 262 [2018-12-01 19:16:53,067 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 818 GetRequests, 654 SyntacticMatches, 0 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3320 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=10211, Invalid=17179, Unknown=0, NotChecked=0, Total=27390 [2018-12-01 19:16:53,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2018-12-01 19:16:53,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 262. [2018-12-01 19:16:53,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2018-12-01 19:16:53,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 347 transitions. [2018-12-01 19:16:53,122 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 347 transitions. Word has length 573 [2018-12-01 19:16:53,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 19:16:53,122 INFO L480 AbstractCegarLoop]: Abstraction has 262 states and 347 transitions. [2018-12-01 19:16:53,122 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-12-01 19:16:53,122 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 347 transitions. [2018-12-01 19:16:53,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 581 [2018-12-01 19:16:53,124 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 19:16:53,124 INFO L402 BasicCegarLoop]: trace histogram [82, 82, 81, 81, 81, 81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 19:16:53,124 INFO L423 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 19:16:53,124 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 19:16:53,124 INFO L82 PathProgramCache]: Analyzing trace with hash -893372228, now seen corresponding path program 81 times [2018-12-01 19:16:53,124 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 19:16:53,124 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 19:16:53,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:16:53,125 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 19:16:53,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:16:53,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:16:54,873 INFO L134 CoverageAnalysis]: Checked inductivity of 23004 backedges. 0 proven. 9882 refuted. 0 times theorem prover too weak. 13122 trivial. 0 not checked. [2018-12-01 19:16:54,873 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 19:16:54,873 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/bin-2019/uautomizer/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 19:16:54,879 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-01 19:16:55,184 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 82 check-sat command(s) [2018-12-01 19:16:55,184 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 19:16:55,193 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 19:16:55,351 INFO L134 CoverageAnalysis]: Checked inductivity of 23004 backedges. 0 proven. 9882 refuted. 0 times theorem prover too weak. 13122 trivial. 0 not checked. [2018-12-01 19:16:55,366 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 19:16:55,366 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2018-12-01 19:16:55,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-12-01 19:16:55,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-12-01 19:16:55,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3490, Invalid=3820, Unknown=0, NotChecked=0, Total=7310 [2018-12-01 19:16:55,367 INFO L87 Difference]: Start difference. First operand 262 states and 347 transitions. Second operand 86 states. [2018-12-01 19:16:58,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 19:16:58,681 INFO L93 Difference]: Finished difference Result 269 states and 355 transitions. [2018-12-01 19:16:58,681 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-12-01 19:16:58,681 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 580 [2018-12-01 19:16:58,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 19:16:58,682 INFO L225 Difference]: With dead ends: 269 [2018-12-01 19:16:58,683 INFO L226 Difference]: Without dead ends: 265 [2018-12-01 19:16:58,684 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 828 GetRequests, 662 SyntacticMatches, 0 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3402 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=10460, Invalid=17596, Unknown=0, NotChecked=0, Total=28056 [2018-12-01 19:16:58,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2018-12-01 19:16:58,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 265. [2018-12-01 19:16:58,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2018-12-01 19:16:58,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 351 transitions. [2018-12-01 19:16:58,739 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 351 transitions. Word has length 580 [2018-12-01 19:16:58,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 19:16:58,739 INFO L480 AbstractCegarLoop]: Abstraction has 265 states and 351 transitions. [2018-12-01 19:16:58,739 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-12-01 19:16:58,739 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 351 transitions. [2018-12-01 19:16:58,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 588 [2018-12-01 19:16:58,742 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 19:16:58,742 INFO L402 BasicCegarLoop]: trace histogram [83, 83, 82, 82, 82, 82, 82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 19:16:58,742 INFO L423 AbstractCegarLoop]: === Iteration 83 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 19:16:58,742 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 19:16:58,743 INFO L82 PathProgramCache]: Analyzing trace with hash 2092663267, now seen corresponding path program 82 times [2018-12-01 19:16:58,743 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 19:16:58,743 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 19:16:58,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:16:58,743 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 19:16:58,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:16:58,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:17:00,592 INFO L134 CoverageAnalysis]: Checked inductivity of 23575 backedges. 0 proven. 10127 refuted. 0 times theorem prover too weak. 13448 trivial. 0 not checked. [2018-12-01 19:17:00,592 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 19:17:00,592 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/bin-2019/uautomizer/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 19:17:00,598 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-01 19:17:00,694 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-01 19:17:00,694 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 19:17:00,705 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 19:17:00,857 INFO L134 CoverageAnalysis]: Checked inductivity of 23575 backedges. 0 proven. 10127 refuted. 0 times theorem prover too weak. 13448 trivial. 0 not checked. [2018-12-01 19:17:00,872 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 19:17:00,872 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-12-01 19:17:00,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-12-01 19:17:00,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-12-01 19:17:00,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3574, Invalid=3908, Unknown=0, NotChecked=0, Total=7482 [2018-12-01 19:17:00,873 INFO L87 Difference]: Start difference. First operand 265 states and 351 transitions. Second operand 87 states. [2018-12-01 19:17:04,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 19:17:04,066 INFO L93 Difference]: Finished difference Result 272 states and 359 transitions. [2018-12-01 19:17:04,066 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-12-01 19:17:04,066 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 587 [2018-12-01 19:17:04,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 19:17:04,067 INFO L225 Difference]: With dead ends: 272 [2018-12-01 19:17:04,067 INFO L226 Difference]: Without dead ends: 268 [2018-12-01 19:17:04,068 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 838 GetRequests, 670 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3485 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=10712, Invalid=18018, Unknown=0, NotChecked=0, Total=28730 [2018-12-01 19:17:04,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2018-12-01 19:17:04,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 268. [2018-12-01 19:17:04,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2018-12-01 19:17:04,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 355 transitions. [2018-12-01 19:17:04,122 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 355 transitions. Word has length 587 [2018-12-01 19:17:04,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 19:17:04,122 INFO L480 AbstractCegarLoop]: Abstraction has 268 states and 355 transitions. [2018-12-01 19:17:04,122 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-12-01 19:17:04,122 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 355 transitions. [2018-12-01 19:17:04,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 595 [2018-12-01 19:17:04,124 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 19:17:04,124 INFO L402 BasicCegarLoop]: trace histogram [84, 84, 83, 83, 83, 83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 19:17:04,124 INFO L423 AbstractCegarLoop]: === Iteration 84 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 19:17:04,124 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 19:17:04,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1154425562, now seen corresponding path program 83 times [2018-12-01 19:17:04,124 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 19:17:04,124 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 19:17:04,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:17:04,125 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 19:17:04,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:17:04,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:17:05,972 INFO L134 CoverageAnalysis]: Checked inductivity of 24153 backedges. 0 proven. 10375 refuted. 0 times theorem prover too weak. 13778 trivial. 0 not checked. [2018-12-01 19:17:05,972 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 19:17:05,972 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/bin-2019/uautomizer/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 19:17:05,979 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-01 19:17:06,346 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 84 check-sat command(s) [2018-12-01 19:17:06,346 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 19:17:06,364 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 19:17:06,522 INFO L134 CoverageAnalysis]: Checked inductivity of 24153 backedges. 0 proven. 10375 refuted. 0 times theorem prover too weak. 13778 trivial. 0 not checked. [2018-12-01 19:17:06,538 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 19:17:06,538 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2018-12-01 19:17:06,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-12-01 19:17:06,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-12-01 19:17:06,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3659, Invalid=3997, Unknown=0, NotChecked=0, Total=7656 [2018-12-01 19:17:06,539 INFO L87 Difference]: Start difference. First operand 268 states and 355 transitions. Second operand 88 states. [2018-12-01 19:17:09,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 19:17:09,147 INFO L93 Difference]: Finished difference Result 275 states and 363 transitions. [2018-12-01 19:17:09,147 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-12-01 19:17:09,147 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 594 [2018-12-01 19:17:09,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 19:17:09,148 INFO L225 Difference]: With dead ends: 275 [2018-12-01 19:17:09,148 INFO L226 Difference]: Without dead ends: 271 [2018-12-01 19:17:09,149 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 848 GetRequests, 678 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3569 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=10967, Invalid=18445, Unknown=0, NotChecked=0, Total=29412 [2018-12-01 19:17:09,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2018-12-01 19:17:09,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 271. [2018-12-01 19:17:09,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2018-12-01 19:17:09,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 359 transitions. [2018-12-01 19:17:09,203 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 359 transitions. Word has length 594 [2018-12-01 19:17:09,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 19:17:09,203 INFO L480 AbstractCegarLoop]: Abstraction has 271 states and 359 transitions. [2018-12-01 19:17:09,203 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-12-01 19:17:09,203 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 359 transitions. [2018-12-01 19:17:09,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 602 [2018-12-01 19:17:09,205 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 19:17:09,205 INFO L402 BasicCegarLoop]: trace histogram [85, 85, 84, 84, 84, 84, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 19:17:09,205 INFO L423 AbstractCegarLoop]: === Iteration 85 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 19:17:09,205 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 19:17:09,205 INFO L82 PathProgramCache]: Analyzing trace with hash 987354617, now seen corresponding path program 84 times [2018-12-01 19:17:09,205 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 19:17:09,205 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 19:17:09,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:17:09,206 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 19:17:09,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:17:09,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:17:11,105 INFO L134 CoverageAnalysis]: Checked inductivity of 24738 backedges. 0 proven. 10626 refuted. 0 times theorem prover too weak. 14112 trivial. 0 not checked. [2018-12-01 19:17:11,105 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 19:17:11,105 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/bin-2019/uautomizer/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 19:17:11,111 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-01 19:17:11,411 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 85 check-sat command(s) [2018-12-01 19:17:11,412 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 19:17:11,423 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 19:17:11,581 INFO L134 CoverageAnalysis]: Checked inductivity of 24738 backedges. 0 proven. 10626 refuted. 0 times theorem prover too weak. 14112 trivial. 0 not checked. [2018-12-01 19:17:11,596 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 19:17:11,597 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-12-01 19:17:11,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-12-01 19:17:11,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-12-01 19:17:11,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3745, Invalid=4087, Unknown=0, NotChecked=0, Total=7832 [2018-12-01 19:17:11,598 INFO L87 Difference]: Start difference. First operand 271 states and 359 transitions. Second operand 89 states. [2018-12-01 19:17:14,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 19:17:14,363 INFO L93 Difference]: Finished difference Result 278 states and 367 transitions. [2018-12-01 19:17:14,363 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-12-01 19:17:14,364 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 601 [2018-12-01 19:17:14,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 19:17:14,364 INFO L225 Difference]: With dead ends: 278 [2018-12-01 19:17:14,364 INFO L226 Difference]: Without dead ends: 274 [2018-12-01 19:17:14,365 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 858 GetRequests, 686 SyntacticMatches, 0 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3654 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=11225, Invalid=18877, Unknown=0, NotChecked=0, Total=30102 [2018-12-01 19:17:14,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2018-12-01 19:17:14,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 274. [2018-12-01 19:17:14,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2018-12-01 19:17:14,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 363 transitions. [2018-12-01 19:17:14,423 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 363 transitions. Word has length 601 [2018-12-01 19:17:14,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 19:17:14,423 INFO L480 AbstractCegarLoop]: Abstraction has 274 states and 363 transitions. [2018-12-01 19:17:14,423 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-12-01 19:17:14,423 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 363 transitions. [2018-12-01 19:17:14,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 609 [2018-12-01 19:17:14,425 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 19:17:14,425 INFO L402 BasicCegarLoop]: trace histogram [86, 86, 85, 85, 85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 19:17:14,425 INFO L423 AbstractCegarLoop]: === Iteration 86 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 19:17:14,426 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 19:17:14,426 INFO L82 PathProgramCache]: Analyzing trace with hash 1293641872, now seen corresponding path program 85 times [2018-12-01 19:17:14,426 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 19:17:14,426 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 19:17:14,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:17:14,426 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 19:17:14,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:17:14,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:17:16,358 INFO L134 CoverageAnalysis]: Checked inductivity of 25330 backedges. 0 proven. 10880 refuted. 0 times theorem prover too weak. 14450 trivial. 0 not checked. [2018-12-01 19:17:16,358 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 19:17:16,359 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/bin-2019/uautomizer/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 19:17:16,364 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 19:17:16,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:17:16,467 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 19:17:16,628 INFO L134 CoverageAnalysis]: Checked inductivity of 25330 backedges. 0 proven. 10880 refuted. 0 times theorem prover too weak. 14450 trivial. 0 not checked. [2018-12-01 19:17:16,643 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 19:17:16,643 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2018-12-01 19:17:16,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-12-01 19:17:16,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-12-01 19:17:16,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3832, Invalid=4178, Unknown=0, NotChecked=0, Total=8010 [2018-12-01 19:17:16,644 INFO L87 Difference]: Start difference. First operand 274 states and 363 transitions. Second operand 90 states. [2018-12-01 19:17:20,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 19:17:20,125 INFO L93 Difference]: Finished difference Result 281 states and 371 transitions. [2018-12-01 19:17:20,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-12-01 19:17:20,125 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 608 [2018-12-01 19:17:20,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 19:17:20,126 INFO L225 Difference]: With dead ends: 281 [2018-12-01 19:17:20,126 INFO L226 Difference]: Without dead ends: 277 [2018-12-01 19:17:20,128 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 868 GetRequests, 694 SyntacticMatches, 0 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3740 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=11486, Invalid=19314, Unknown=0, NotChecked=0, Total=30800 [2018-12-01 19:17:20,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2018-12-01 19:17:20,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 277. [2018-12-01 19:17:20,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2018-12-01 19:17:20,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 367 transitions. [2018-12-01 19:17:20,188 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 367 transitions. Word has length 608 [2018-12-01 19:17:20,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 19:17:20,188 INFO L480 AbstractCegarLoop]: Abstraction has 277 states and 367 transitions. [2018-12-01 19:17:20,188 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-12-01 19:17:20,188 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 367 transitions. [2018-12-01 19:17:20,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 616 [2018-12-01 19:17:20,191 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 19:17:20,192 INFO L402 BasicCegarLoop]: trace histogram [87, 87, 86, 86, 86, 86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 19:17:20,192 INFO L423 AbstractCegarLoop]: === Iteration 87 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 19:17:20,192 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 19:17:20,192 INFO L82 PathProgramCache]: Analyzing trace with hash 982684431, now seen corresponding path program 86 times [2018-12-01 19:17:20,192 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 19:17:20,192 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 19:17:20,193 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:17:20,193 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 19:17:20,193 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:17:20,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:17:22,166 INFO L134 CoverageAnalysis]: Checked inductivity of 25929 backedges. 0 proven. 11137 refuted. 0 times theorem prover too weak. 14792 trivial. 0 not checked. [2018-12-01 19:17:22,166 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 19:17:22,166 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/bin-2019/uautomizer/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 19:17:22,171 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-01 19:17:22,267 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-01 19:17:22,267 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 19:17:22,274 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 19:17:22,438 INFO L134 CoverageAnalysis]: Checked inductivity of 25929 backedges. 0 proven. 11137 refuted. 0 times theorem prover too weak. 14792 trivial. 0 not checked. [2018-12-01 19:17:22,453 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 19:17:22,453 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-12-01 19:17:22,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-12-01 19:17:22,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-12-01 19:17:22,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3920, Invalid=4270, Unknown=0, NotChecked=0, Total=8190 [2018-12-01 19:17:22,454 INFO L87 Difference]: Start difference. First operand 277 states and 367 transitions. Second operand 91 states. [2018-12-01 19:17:25,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 19:17:25,763 INFO L93 Difference]: Finished difference Result 284 states and 375 transitions. [2018-12-01 19:17:25,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-12-01 19:17:25,763 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 615 [2018-12-01 19:17:25,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 19:17:25,765 INFO L225 Difference]: With dead ends: 284 [2018-12-01 19:17:25,765 INFO L226 Difference]: Without dead ends: 280 [2018-12-01 19:17:25,773 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 878 GetRequests, 702 SyntacticMatches, 0 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3827 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=11750, Invalid=19756, Unknown=0, NotChecked=0, Total=31506 [2018-12-01 19:17:25,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2018-12-01 19:17:25,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 280. [2018-12-01 19:17:25,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2018-12-01 19:17:25,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 371 transitions. [2018-12-01 19:17:25,834 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 371 transitions. Word has length 615 [2018-12-01 19:17:25,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 19:17:25,834 INFO L480 AbstractCegarLoop]: Abstraction has 280 states and 371 transitions. [2018-12-01 19:17:25,834 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-12-01 19:17:25,834 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 371 transitions. [2018-12-01 19:17:25,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 623 [2018-12-01 19:17:25,836 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 19:17:25,836 INFO L402 BasicCegarLoop]: trace histogram [88, 88, 87, 87, 87, 87, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 19:17:25,836 INFO L423 AbstractCegarLoop]: === Iteration 88 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 19:17:25,836 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 19:17:25,836 INFO L82 PathProgramCache]: Analyzing trace with hash -336643334, now seen corresponding path program 87 times [2018-12-01 19:17:25,836 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 19:17:25,836 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 19:17:25,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:17:25,837 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 19:17:25,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:17:25,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:17:27,842 INFO L134 CoverageAnalysis]: Checked inductivity of 26535 backedges. 0 proven. 11397 refuted. 0 times theorem prover too weak. 15138 trivial. 0 not checked. [2018-12-01 19:17:27,843 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 19:17:27,843 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/bin-2019/uautomizer/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 19:17:27,849 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-01 19:17:28,195 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 88 check-sat command(s) [2018-12-01 19:17:28,195 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 19:17:28,206 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 19:17:28,375 INFO L134 CoverageAnalysis]: Checked inductivity of 26535 backedges. 0 proven. 11397 refuted. 0 times theorem prover too weak. 15138 trivial. 0 not checked. [2018-12-01 19:17:28,390 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 19:17:28,391 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 92 [2018-12-01 19:17:28,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-12-01 19:17:28,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-12-01 19:17:28,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4009, Invalid=4363, Unknown=0, NotChecked=0, Total=8372 [2018-12-01 19:17:28,392 INFO L87 Difference]: Start difference. First operand 280 states and 371 transitions. Second operand 92 states. [2018-12-01 19:17:31,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 19:17:31,411 INFO L93 Difference]: Finished difference Result 287 states and 379 transitions. [2018-12-01 19:17:31,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-12-01 19:17:31,411 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 622 [2018-12-01 19:17:31,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 19:17:31,412 INFO L225 Difference]: With dead ends: 287 [2018-12-01 19:17:31,412 INFO L226 Difference]: Without dead ends: 283 [2018-12-01 19:17:31,413 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 888 GetRequests, 710 SyntacticMatches, 0 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3915 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=12017, Invalid=20203, Unknown=0, NotChecked=0, Total=32220 [2018-12-01 19:17:31,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2018-12-01 19:17:31,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 283. [2018-12-01 19:17:31,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 283 states. [2018-12-01 19:17:31,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 375 transitions. [2018-12-01 19:17:31,478 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 375 transitions. Word has length 622 [2018-12-01 19:17:31,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 19:17:31,479 INFO L480 AbstractCegarLoop]: Abstraction has 283 states and 375 transitions. [2018-12-01 19:17:31,479 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-12-01 19:17:31,479 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 375 transitions. [2018-12-01 19:17:31,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 630 [2018-12-01 19:17:31,481 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 19:17:31,481 INFO L402 BasicCegarLoop]: trace histogram [89, 89, 88, 88, 88, 88, 88, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 19:17:31,481 INFO L423 AbstractCegarLoop]: === Iteration 89 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 19:17:31,481 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 19:17:31,481 INFO L82 PathProgramCache]: Analyzing trace with hash 554064165, now seen corresponding path program 88 times [2018-12-01 19:17:31,481 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 19:17:31,481 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 19:17:31,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:17:31,481 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 19:17:31,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:17:31,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:17:33,525 INFO L134 CoverageAnalysis]: Checked inductivity of 27148 backedges. 0 proven. 11660 refuted. 0 times theorem prover too weak. 15488 trivial. 0 not checked. [2018-12-01 19:17:33,525 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 19:17:33,525 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/bin-2019/uautomizer/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 19:17:33,531 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-01 19:17:33,631 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-01 19:17:33,631 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 19:17:33,643 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 19:17:33,815 INFO L134 CoverageAnalysis]: Checked inductivity of 27148 backedges. 0 proven. 11660 refuted. 0 times theorem prover too weak. 15488 trivial. 0 not checked. [2018-12-01 19:17:33,830 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 19:17:33,830 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-12-01 19:17:33,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-12-01 19:17:33,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-12-01 19:17:33,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4099, Invalid=4457, Unknown=0, NotChecked=0, Total=8556 [2018-12-01 19:17:33,831 INFO L87 Difference]: Start difference. First operand 283 states and 375 transitions. Second operand 93 states. [2018-12-01 19:17:37,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 19:17:37,074 INFO L93 Difference]: Finished difference Result 290 states and 383 transitions. [2018-12-01 19:17:37,074 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-12-01 19:17:37,074 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 629 [2018-12-01 19:17:37,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 19:17:37,075 INFO L225 Difference]: With dead ends: 290 [2018-12-01 19:17:37,075 INFO L226 Difference]: Without dead ends: 286 [2018-12-01 19:17:37,076 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 898 GetRequests, 718 SyntacticMatches, 0 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4004 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=12287, Invalid=20655, Unknown=0, NotChecked=0, Total=32942 [2018-12-01 19:17:37,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2018-12-01 19:17:37,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 286. [2018-12-01 19:17:37,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2018-12-01 19:17:37,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 379 transitions. [2018-12-01 19:17:37,140 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 379 transitions. Word has length 629 [2018-12-01 19:17:37,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 19:17:37,140 INFO L480 AbstractCegarLoop]: Abstraction has 286 states and 379 transitions. [2018-12-01 19:17:37,140 INFO L481 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-12-01 19:17:37,140 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 379 transitions. [2018-12-01 19:17:37,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 637 [2018-12-01 19:17:37,142 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 19:17:37,143 INFO L402 BasicCegarLoop]: trace histogram [90, 90, 89, 89, 89, 89, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 19:17:37,143 INFO L423 AbstractCegarLoop]: === Iteration 90 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 19:17:37,143 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 19:17:37,143 INFO L82 PathProgramCache]: Analyzing trace with hash -897862556, now seen corresponding path program 89 times [2018-12-01 19:17:37,143 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 19:17:37,143 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 19:17:37,143 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:17:37,143 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 19:17:37,143 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:17:37,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:17:39,218 INFO L134 CoverageAnalysis]: Checked inductivity of 27768 backedges. 0 proven. 11926 refuted. 0 times theorem prover too weak. 15842 trivial. 0 not checked. [2018-12-01 19:17:39,218 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 19:17:39,218 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/bin-2019/uautomizer/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 19:17:39,224 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-01 19:17:39,638 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 90 check-sat command(s) [2018-12-01 19:17:39,638 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 19:17:39,656 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 19:17:39,832 INFO L134 CoverageAnalysis]: Checked inductivity of 27768 backedges. 0 proven. 11926 refuted. 0 times theorem prover too weak. 15842 trivial. 0 not checked. [2018-12-01 19:17:39,848 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 19:17:39,848 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 94 [2018-12-01 19:17:39,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-12-01 19:17:39,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-12-01 19:17:39,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4190, Invalid=4552, Unknown=0, NotChecked=0, Total=8742 [2018-12-01 19:17:39,849 INFO L87 Difference]: Start difference. First operand 286 states and 379 transitions. Second operand 94 states. [2018-12-01 19:17:43,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 19:17:43,413 INFO L93 Difference]: Finished difference Result 293 states and 387 transitions. [2018-12-01 19:17:43,413 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-12-01 19:17:43,413 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 636 [2018-12-01 19:17:43,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 19:17:43,414 INFO L225 Difference]: With dead ends: 293 [2018-12-01 19:17:43,414 INFO L226 Difference]: Without dead ends: 289 [2018-12-01 19:17:43,415 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 908 GetRequests, 726 SyntacticMatches, 0 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4094 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=12560, Invalid=21112, Unknown=0, NotChecked=0, Total=33672 [2018-12-01 19:17:43,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2018-12-01 19:17:43,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 289. [2018-12-01 19:17:43,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 289 states. [2018-12-01 19:17:43,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 383 transitions. [2018-12-01 19:17:43,487 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 383 transitions. Word has length 636 [2018-12-01 19:17:43,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 19:17:43,487 INFO L480 AbstractCegarLoop]: Abstraction has 289 states and 383 transitions. [2018-12-01 19:17:43,487 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-12-01 19:17:43,487 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 383 transitions. [2018-12-01 19:17:43,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 644 [2018-12-01 19:17:43,489 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 19:17:43,489 INFO L402 BasicCegarLoop]: trace histogram [91, 91, 90, 90, 90, 90, 90, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 19:17:43,489 INFO L423 AbstractCegarLoop]: === Iteration 91 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 19:17:43,489 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 19:17:43,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1526057019, now seen corresponding path program 90 times [2018-12-01 19:17:43,490 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 19:17:43,490 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 19:17:43,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:17:43,490 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 19:17:43,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:17:43,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:17:45,640 INFO L134 CoverageAnalysis]: Checked inductivity of 28395 backedges. 0 proven. 12195 refuted. 0 times theorem prover too weak. 16200 trivial. 0 not checked. [2018-12-01 19:17:45,640 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 19:17:45,640 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/bin-2019/uautomizer/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 19:17:45,646 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-01 19:17:45,978 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 91 check-sat command(s) [2018-12-01 19:17:45,978 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 19:17:45,989 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 19:17:46,165 INFO L134 CoverageAnalysis]: Checked inductivity of 28395 backedges. 0 proven. 12195 refuted. 0 times theorem prover too weak. 16200 trivial. 0 not checked. [2018-12-01 19:17:46,181 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 19:17:46,181 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-12-01 19:17:46,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-12-01 19:17:46,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-12-01 19:17:46,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4282, Invalid=4648, Unknown=0, NotChecked=0, Total=8930 [2018-12-01 19:17:46,182 INFO L87 Difference]: Start difference. First operand 289 states and 383 transitions. Second operand 95 states. [2018-12-01 19:17:49,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 19:17:49,686 INFO L93 Difference]: Finished difference Result 296 states and 391 transitions. [2018-12-01 19:17:49,686 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-12-01 19:17:49,686 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 643 [2018-12-01 19:17:49,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 19:17:49,687 INFO L225 Difference]: With dead ends: 296 [2018-12-01 19:17:49,687 INFO L226 Difference]: Without dead ends: 292 [2018-12-01 19:17:49,693 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 918 GetRequests, 734 SyntacticMatches, 0 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4185 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=12836, Invalid=21574, Unknown=0, NotChecked=0, Total=34410 [2018-12-01 19:17:49,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2018-12-01 19:17:49,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 292. [2018-12-01 19:17:49,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 292 states. [2018-12-01 19:17:49,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 387 transitions. [2018-12-01 19:17:49,762 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 387 transitions. Word has length 643 [2018-12-01 19:17:49,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 19:17:49,763 INFO L480 AbstractCegarLoop]: Abstraction has 292 states and 387 transitions. [2018-12-01 19:17:49,763 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-12-01 19:17:49,763 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 387 transitions. [2018-12-01 19:17:49,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 651 [2018-12-01 19:17:49,766 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 19:17:49,766 INFO L402 BasicCegarLoop]: trace histogram [92, 92, 91, 91, 91, 91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 19:17:49,767 INFO L423 AbstractCegarLoop]: === Iteration 92 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 19:17:49,767 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 19:17:49,767 INFO L82 PathProgramCache]: Analyzing trace with hash 82851022, now seen corresponding path program 91 times [2018-12-01 19:17:49,767 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 19:17:49,767 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 19:17:49,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:17:49,767 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 19:17:49,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:17:49,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:17:51,972 INFO L134 CoverageAnalysis]: Checked inductivity of 29029 backedges. 0 proven. 12467 refuted. 0 times theorem prover too weak. 16562 trivial. 0 not checked. [2018-12-01 19:17:51,972 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 19:17:51,972 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/bin-2019/uautomizer/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 19:17:51,978 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 19:17:52,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:17:52,084 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 19:17:52,274 INFO L134 CoverageAnalysis]: Checked inductivity of 29029 backedges. 0 proven. 12467 refuted. 0 times theorem prover too weak. 16562 trivial. 0 not checked. [2018-12-01 19:17:52,288 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 19:17:52,289 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 96 [2018-12-01 19:17:52,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-12-01 19:17:52,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-12-01 19:17:52,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4375, Invalid=4745, Unknown=0, NotChecked=0, Total=9120 [2018-12-01 19:17:52,290 INFO L87 Difference]: Start difference. First operand 292 states and 387 transitions. Second operand 96 states. [2018-12-01 19:17:56,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 19:17:56,645 INFO L93 Difference]: Finished difference Result 299 states and 395 transitions. [2018-12-01 19:17:56,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-12-01 19:17:56,645 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 650 [2018-12-01 19:17:56,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 19:17:56,646 INFO L225 Difference]: With dead ends: 299 [2018-12-01 19:17:56,646 INFO L226 Difference]: Without dead ends: 295 [2018-12-01 19:17:56,647 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 928 GetRequests, 742 SyntacticMatches, 0 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4277 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=13115, Invalid=22041, Unknown=0, NotChecked=0, Total=35156 [2018-12-01 19:17:56,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2018-12-01 19:17:56,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 295. [2018-12-01 19:17:56,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 295 states. [2018-12-01 19:17:56,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 391 transitions. [2018-12-01 19:17:56,716 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 391 transitions. Word has length 650 [2018-12-01 19:17:56,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 19:17:56,716 INFO L480 AbstractCegarLoop]: Abstraction has 295 states and 391 transitions. [2018-12-01 19:17:56,716 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-12-01 19:17:56,717 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 391 transitions. [2018-12-01 19:17:56,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 658 [2018-12-01 19:17:56,719 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 19:17:56,719 INFO L402 BasicCegarLoop]: trace histogram [93, 93, 92, 92, 92, 92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 19:17:56,719 INFO L423 AbstractCegarLoop]: === Iteration 93 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 19:17:56,719 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 19:17:56,719 INFO L82 PathProgramCache]: Analyzing trace with hash 2059501649, now seen corresponding path program 92 times [2018-12-01 19:17:56,719 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 19:17:56,719 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 19:17:56,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:17:56,720 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 19:17:56,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:17:56,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:17:58,962 INFO L134 CoverageAnalysis]: Checked inductivity of 29670 backedges. 0 proven. 12742 refuted. 0 times theorem prover too weak. 16928 trivial. 0 not checked. [2018-12-01 19:17:58,962 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 19:17:58,962 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/bin-2019/uautomizer/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 19:17:58,967 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-01 19:17:59,063 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-01 19:17:59,064 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 19:17:59,072 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 19:17:59,259 INFO L134 CoverageAnalysis]: Checked inductivity of 29670 backedges. 0 proven. 12742 refuted. 0 times theorem prover too weak. 16928 trivial. 0 not checked. [2018-12-01 19:17:59,274 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 19:17:59,274 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-12-01 19:17:59,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-12-01 19:17:59,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-12-01 19:17:59,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4469, Invalid=4843, Unknown=0, NotChecked=0, Total=9312 [2018-12-01 19:17:59,275 INFO L87 Difference]: Start difference. First operand 295 states and 391 transitions. Second operand 97 states. [2018-12-01 19:18:02,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 19:18:02,725 INFO L93 Difference]: Finished difference Result 302 states and 399 transitions. [2018-12-01 19:18:02,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-12-01 19:18:02,725 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 657 [2018-12-01 19:18:02,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 19:18:02,726 INFO L225 Difference]: With dead ends: 302 [2018-12-01 19:18:02,726 INFO L226 Difference]: Without dead ends: 298 [2018-12-01 19:18:02,727 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 938 GetRequests, 750 SyntacticMatches, 0 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4370 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=13397, Invalid=22513, Unknown=0, NotChecked=0, Total=35910 [2018-12-01 19:18:02,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2018-12-01 19:18:02,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 298. [2018-12-01 19:18:02,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 298 states. [2018-12-01 19:18:02,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 395 transitions. [2018-12-01 19:18:02,801 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 395 transitions. Word has length 657 [2018-12-01 19:18:02,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 19:18:02,801 INFO L480 AbstractCegarLoop]: Abstraction has 298 states and 395 transitions. [2018-12-01 19:18:02,801 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-12-01 19:18:02,801 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 395 transitions. [2018-12-01 19:18:02,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 665 [2018-12-01 19:18:02,803 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 19:18:02,803 INFO L402 BasicCegarLoop]: trace histogram [94, 94, 93, 93, 93, 93, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 19:18:02,803 INFO L423 AbstractCegarLoop]: === Iteration 94 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 19:18:02,803 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 19:18:02,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1025762248, now seen corresponding path program 93 times [2018-12-01 19:18:02,804 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 19:18:02,804 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 19:18:02,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:18:02,804 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 19:18:02,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:18:02,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:18:05,106 INFO L134 CoverageAnalysis]: Checked inductivity of 30318 backedges. 0 proven. 13020 refuted. 0 times theorem prover too weak. 17298 trivial. 0 not checked. [2018-12-01 19:18:05,106 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 19:18:05,106 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/bin-2019/uautomizer/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 19:18:05,112 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-01 19:18:05,501 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 94 check-sat command(s) [2018-12-01 19:18:05,501 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 19:18:05,513 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 19:18:05,705 INFO L134 CoverageAnalysis]: Checked inductivity of 30318 backedges. 0 proven. 13020 refuted. 0 times theorem prover too weak. 17298 trivial. 0 not checked. [2018-12-01 19:18:05,720 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 19:18:05,721 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 98 [2018-12-01 19:18:05,721 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-12-01 19:18:05,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-12-01 19:18:05,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4564, Invalid=4942, Unknown=0, NotChecked=0, Total=9506 [2018-12-01 19:18:05,722 INFO L87 Difference]: Start difference. First operand 298 states and 395 transitions. Second operand 98 states. [2018-12-01 19:18:09,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 19:18:09,648 INFO L93 Difference]: Finished difference Result 305 states and 403 transitions. [2018-12-01 19:18:09,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-12-01 19:18:09,648 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 664 [2018-12-01 19:18:09,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 19:18:09,649 INFO L225 Difference]: With dead ends: 305 [2018-12-01 19:18:09,649 INFO L226 Difference]: Without dead ends: 301 [2018-12-01 19:18:09,650 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 948 GetRequests, 758 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4464 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=13682, Invalid=22990, Unknown=0, NotChecked=0, Total=36672 [2018-12-01 19:18:09,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2018-12-01 19:18:09,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 301. [2018-12-01 19:18:09,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2018-12-01 19:18:09,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 399 transitions. [2018-12-01 19:18:09,731 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 399 transitions. Word has length 664 [2018-12-01 19:18:09,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 19:18:09,731 INFO L480 AbstractCegarLoop]: Abstraction has 301 states and 399 transitions. [2018-12-01 19:18:09,731 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-12-01 19:18:09,731 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 399 transitions. [2018-12-01 19:18:09,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 672 [2018-12-01 19:18:09,733 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 19:18:09,733 INFO L402 BasicCegarLoop]: trace histogram [95, 95, 94, 94, 94, 94, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 19:18:09,733 INFO L423 AbstractCegarLoop]: === Iteration 95 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 19:18:09,733 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 19:18:09,734 INFO L82 PathProgramCache]: Analyzing trace with hash -1771429529, now seen corresponding path program 94 times [2018-12-01 19:18:09,734 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 19:18:09,734 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 19:18:09,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:18:09,734 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 19:18:09,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:18:09,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:18:12,099 INFO L134 CoverageAnalysis]: Checked inductivity of 30973 backedges. 0 proven. 13301 refuted. 0 times theorem prover too weak. 17672 trivial. 0 not checked. [2018-12-01 19:18:12,099 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 19:18:12,099 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/bin-2019/uautomizer/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 19:18:12,105 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-01 19:18:12,217 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-01 19:18:12,217 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 19:18:12,230 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 19:18:12,423 INFO L134 CoverageAnalysis]: Checked inductivity of 30973 backedges. 0 proven. 13301 refuted. 0 times theorem prover too weak. 17672 trivial. 0 not checked. [2018-12-01 19:18:12,438 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 19:18:12,438 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2018-12-01 19:18:12,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-12-01 19:18:12,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-12-01 19:18:12,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4660, Invalid=5042, Unknown=0, NotChecked=0, Total=9702 [2018-12-01 19:18:12,440 INFO L87 Difference]: Start difference. First operand 301 states and 399 transitions. Second operand 99 states. [2018-12-01 19:18:15,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 19:18:15,876 INFO L93 Difference]: Finished difference Result 308 states and 407 transitions. [2018-12-01 19:18:15,876 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-12-01 19:18:15,877 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 671 [2018-12-01 19:18:15,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 19:18:15,877 INFO L225 Difference]: With dead ends: 308 [2018-12-01 19:18:15,877 INFO L226 Difference]: Without dead ends: 304 [2018-12-01 19:18:15,879 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 958 GetRequests, 766 SyntacticMatches, 0 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4559 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=13970, Invalid=23472, Unknown=0, NotChecked=0, Total=37442 [2018-12-01 19:18:15,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2018-12-01 19:18:15,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 304. [2018-12-01 19:18:15,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2018-12-01 19:18:15,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 403 transitions. [2018-12-01 19:18:15,955 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 403 transitions. Word has length 671 [2018-12-01 19:18:15,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 19:18:15,956 INFO L480 AbstractCegarLoop]: Abstraction has 304 states and 403 transitions. [2018-12-01 19:18:15,956 INFO L481 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-12-01 19:18:15,956 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 403 transitions. [2018-12-01 19:18:15,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 679 [2018-12-01 19:18:15,958 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 19:18:15,958 INFO L402 BasicCegarLoop]: trace histogram [96, 96, 95, 95, 95, 95, 95, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 19:18:15,958 INFO L423 AbstractCegarLoop]: === Iteration 96 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 19:18:15,958 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 19:18:15,958 INFO L82 PathProgramCache]: Analyzing trace with hash 1496238754, now seen corresponding path program 95 times [2018-12-01 19:18:15,958 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 19:18:15,958 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 19:18:15,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:18:15,959 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 19:18:15,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:18:16,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:18:18,338 INFO L134 CoverageAnalysis]: Checked inductivity of 31635 backedges. 0 proven. 13585 refuted. 0 times theorem prover too weak. 18050 trivial. 0 not checked. [2018-12-01 19:18:18,338 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 19:18:18,339 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/bin-2019/uautomizer/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 19:18:18,344 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-01 19:18:18,813 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 96 check-sat command(s) [2018-12-01 19:18:18,813 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 19:18:18,835 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 19:18:19,031 INFO L134 CoverageAnalysis]: Checked inductivity of 31635 backedges. 0 proven. 13585 refuted. 0 times theorem prover too weak. 18050 trivial. 0 not checked. [2018-12-01 19:18:19,048 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 19:18:19,048 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 100 [2018-12-01 19:18:19,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-12-01 19:18:19,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-12-01 19:18:19,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4757, Invalid=5143, Unknown=0, NotChecked=0, Total=9900 [2018-12-01 19:18:19,049 INFO L87 Difference]: Start difference. First operand 304 states and 403 transitions. Second operand 100 states. [2018-12-01 19:18:22,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 19:18:22,582 INFO L93 Difference]: Finished difference Result 311 states and 411 transitions. [2018-12-01 19:18:22,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-12-01 19:18:22,582 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 678 [2018-12-01 19:18:22,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 19:18:22,583 INFO L225 Difference]: With dead ends: 311 [2018-12-01 19:18:22,583 INFO L226 Difference]: Without dead ends: 307 [2018-12-01 19:18:22,585 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 968 GetRequests, 774 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4655 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=14261, Invalid=23959, Unknown=0, NotChecked=0, Total=38220 [2018-12-01 19:18:22,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2018-12-01 19:18:22,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 307. [2018-12-01 19:18:22,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 307 states. [2018-12-01 19:18:22,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 407 transitions. [2018-12-01 19:18:22,672 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 407 transitions. Word has length 678 [2018-12-01 19:18:22,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 19:18:22,672 INFO L480 AbstractCegarLoop]: Abstraction has 307 states and 407 transitions. [2018-12-01 19:18:22,672 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-12-01 19:18:22,672 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 407 transitions. [2018-12-01 19:18:22,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 686 [2018-12-01 19:18:22,675 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 19:18:22,675 INFO L402 BasicCegarLoop]: trace histogram [97, 97, 96, 96, 96, 96, 96, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 19:18:22,675 INFO L423 AbstractCegarLoop]: === Iteration 97 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 19:18:22,675 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 19:18:22,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1517270147, now seen corresponding path program 96 times [2018-12-01 19:18:22,675 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 19:18:22,675 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 19:18:22,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:18:22,676 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 19:18:22,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:18:22,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:18:25,100 INFO L134 CoverageAnalysis]: Checked inductivity of 32304 backedges. 0 proven. 13872 refuted. 0 times theorem prover too weak. 18432 trivial. 0 not checked. [2018-12-01 19:18:25,100 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 19:18:25,100 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/bin-2019/uautomizer/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 19:18:25,107 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-01 19:18:25,486 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 97 check-sat command(s) [2018-12-01 19:18:25,486 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 19:18:25,497 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 19:18:25,709 INFO L134 CoverageAnalysis]: Checked inductivity of 32304 backedges. 0 proven. 13872 refuted. 0 times theorem prover too weak. 18432 trivial. 0 not checked. [2018-12-01 19:18:25,725 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 19:18:25,725 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 101 [2018-12-01 19:18:25,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-12-01 19:18:25,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-12-01 19:18:25,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4855, Invalid=5245, Unknown=0, NotChecked=0, Total=10100 [2018-12-01 19:18:25,726 INFO L87 Difference]: Start difference. First operand 307 states and 407 transitions. Second operand 101 states. [2018-12-01 19:18:29,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 19:18:29,359 INFO L93 Difference]: Finished difference Result 314 states and 415 transitions. [2018-12-01 19:18:29,359 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-12-01 19:18:29,359 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 685 [2018-12-01 19:18:29,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 19:18:29,360 INFO L225 Difference]: With dead ends: 314 [2018-12-01 19:18:29,360 INFO L226 Difference]: Without dead ends: 310 [2018-12-01 19:18:29,361 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 978 GetRequests, 782 SyntacticMatches, 0 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4752 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=14555, Invalid=24451, Unknown=0, NotChecked=0, Total=39006 [2018-12-01 19:18:29,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2018-12-01 19:18:29,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 310. [2018-12-01 19:18:29,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 310 states. [2018-12-01 19:18:29,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 411 transitions. [2018-12-01 19:18:29,447 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 411 transitions. Word has length 685 [2018-12-01 19:18:29,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 19:18:29,448 INFO L480 AbstractCegarLoop]: Abstraction has 310 states and 411 transitions. [2018-12-01 19:18:29,448 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-12-01 19:18:29,448 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 411 transitions. [2018-12-01 19:18:29,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 693 [2018-12-01 19:18:29,450 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 19:18:29,450 INFO L402 BasicCegarLoop]: trace histogram [98, 98, 97, 97, 97, 97, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 19:18:29,450 INFO L423 AbstractCegarLoop]: === Iteration 98 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 19:18:29,450 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 19:18:29,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1815584780, now seen corresponding path program 97 times [2018-12-01 19:18:29,451 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 19:18:29,451 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 19:18:29,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:18:29,451 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 19:18:29,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:18:29,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:18:31,993 INFO L134 CoverageAnalysis]: Checked inductivity of 32980 backedges. 0 proven. 14162 refuted. 0 times theorem prover too weak. 18818 trivial. 0 not checked. [2018-12-01 19:18:31,993 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 19:18:31,993 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/bin-2019/uautomizer/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 19:18:31,999 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 19:18:32,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:18:32,129 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 19:18:32,341 INFO L134 CoverageAnalysis]: Checked inductivity of 32980 backedges. 0 proven. 14162 refuted. 0 times theorem prover too weak. 18818 trivial. 0 not checked. [2018-12-01 19:18:32,356 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 19:18:32,356 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 102 [2018-12-01 19:18:32,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-12-01 19:18:32,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-12-01 19:18:32,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4954, Invalid=5348, Unknown=0, NotChecked=0, Total=10302 [2018-12-01 19:18:32,358 INFO L87 Difference]: Start difference. First operand 310 states and 411 transitions. Second operand 102 states. [2018-12-01 19:18:36,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 19:18:36,339 INFO L93 Difference]: Finished difference Result 317 states and 419 transitions. [2018-12-01 19:18:36,340 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-12-01 19:18:36,340 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 692 [2018-12-01 19:18:36,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 19:18:36,341 INFO L225 Difference]: With dead ends: 317 [2018-12-01 19:18:36,341 INFO L226 Difference]: Without dead ends: 313 [2018-12-01 19:18:36,342 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 988 GetRequests, 790 SyntacticMatches, 0 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4850 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=14852, Invalid=24948, Unknown=0, NotChecked=0, Total=39800 [2018-12-01 19:18:36,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2018-12-01 19:18:36,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 313. [2018-12-01 19:18:36,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 313 states. [2018-12-01 19:18:36,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 415 transitions. [2018-12-01 19:18:36,431 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 415 transitions. Word has length 692 [2018-12-01 19:18:36,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 19:18:36,431 INFO L480 AbstractCegarLoop]: Abstraction has 313 states and 415 transitions. [2018-12-01 19:18:36,432 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-12-01 19:18:36,432 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 415 transitions. [2018-12-01 19:18:36,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 700 [2018-12-01 19:18:36,434 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 19:18:36,434 INFO L402 BasicCegarLoop]: trace histogram [99, 99, 98, 98, 98, 98, 98, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 19:18:36,434 INFO L423 AbstractCegarLoop]: === Iteration 99 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 19:18:36,434 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 19:18:36,434 INFO L82 PathProgramCache]: Analyzing trace with hash -546005357, now seen corresponding path program 98 times [2018-12-01 19:18:36,434 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 19:18:36,434 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 19:18:36,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:18:36,435 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 19:18:36,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:18:36,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:18:38,992 INFO L134 CoverageAnalysis]: Checked inductivity of 33663 backedges. 0 proven. 14455 refuted. 0 times theorem prover too weak. 19208 trivial. 0 not checked. [2018-12-01 19:18:38,992 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 19:18:38,992 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/bin-2019/uautomizer/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 19:18:38,999 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-01 19:18:39,109 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-01 19:18:39,109 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 19:18:39,117 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 19:18:39,338 INFO L134 CoverageAnalysis]: Checked inductivity of 33663 backedges. 0 proven. 14455 refuted. 0 times theorem prover too weak. 19208 trivial. 0 not checked. [2018-12-01 19:18:39,353 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 19:18:39,353 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 103 [2018-12-01 19:18:39,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-12-01 19:18:39,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-12-01 19:18:39,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5054, Invalid=5452, Unknown=0, NotChecked=0, Total=10506 [2018-12-01 19:18:39,354 INFO L87 Difference]: Start difference. First operand 313 states and 415 transitions. Second operand 103 states. [2018-12-01 19:18:43,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 19:18:43,464 INFO L93 Difference]: Finished difference Result 320 states and 423 transitions. [2018-12-01 19:18:43,464 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-12-01 19:18:43,464 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 699 [2018-12-01 19:18:43,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 19:18:43,465 INFO L225 Difference]: With dead ends: 320 [2018-12-01 19:18:43,465 INFO L226 Difference]: Without dead ends: 316 [2018-12-01 19:18:43,467 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 998 GetRequests, 798 SyntacticMatches, 0 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4949 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=15152, Invalid=25450, Unknown=0, NotChecked=0, Total=40602 [2018-12-01 19:18:43,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2018-12-01 19:18:43,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 316. [2018-12-01 19:18:43,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 316 states. [2018-12-01 19:18:43,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 419 transitions. [2018-12-01 19:18:43,558 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 419 transitions. Word has length 699 [2018-12-01 19:18:43,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 19:18:43,558 INFO L480 AbstractCegarLoop]: Abstraction has 316 states and 419 transitions. [2018-12-01 19:18:43,558 INFO L481 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-12-01 19:18:43,559 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 419 transitions. [2018-12-01 19:18:43,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 707 [2018-12-01 19:18:43,561 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 19:18:43,561 INFO L402 BasicCegarLoop]: trace histogram [100, 100, 99, 99, 99, 99, 99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 19:18:43,561 INFO L423 AbstractCegarLoop]: === Iteration 100 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 19:18:43,561 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 19:18:43,561 INFO L82 PathProgramCache]: Analyzing trace with hash 296090742, now seen corresponding path program 99 times [2018-12-01 19:18:43,561 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 19:18:43,561 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 19:18:43,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:18:43,562 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 19:18:43,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:18:43,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:18:46,122 INFO L134 CoverageAnalysis]: Checked inductivity of 34353 backedges. 0 proven. 14751 refuted. 0 times theorem prover too weak. 19602 trivial. 0 not checked. [2018-12-01 19:18:46,123 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 19:18:46,123 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/bin-2019/uautomizer/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 19:18:46,128 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-01 19:18:46,573 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 100 check-sat command(s) [2018-12-01 19:18:46,573 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 19:18:46,586 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 19:18:46,812 INFO L134 CoverageAnalysis]: Checked inductivity of 34353 backedges. 0 proven. 14751 refuted. 0 times theorem prover too weak. 19602 trivial. 0 not checked. [2018-12-01 19:18:46,828 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 19:18:46,828 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 104 [2018-12-01 19:18:46,828 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-12-01 19:18:46,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-12-01 19:18:46,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5155, Invalid=5557, Unknown=0, NotChecked=0, Total=10712 [2018-12-01 19:18:46,829 INFO L87 Difference]: Start difference. First operand 316 states and 419 transitions. Second operand 104 states. [2018-12-01 19:18:50,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 19:18:50,748 INFO L93 Difference]: Finished difference Result 323 states and 427 transitions. [2018-12-01 19:18:50,748 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-12-01 19:18:50,748 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 706 [2018-12-01 19:18:50,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 19:18:50,749 INFO L225 Difference]: With dead ends: 323 [2018-12-01 19:18:50,749 INFO L226 Difference]: Without dead ends: 319 [2018-12-01 19:18:50,750 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1008 GetRequests, 806 SyntacticMatches, 0 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5049 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=15455, Invalid=25957, Unknown=0, NotChecked=0, Total=41412 [2018-12-01 19:18:50,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2018-12-01 19:18:50,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 319. [2018-12-01 19:18:50,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2018-12-01 19:18:50,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 423 transitions. [2018-12-01 19:18:50,840 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 423 transitions. Word has length 706 [2018-12-01 19:18:50,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 19:18:50,841 INFO L480 AbstractCegarLoop]: Abstraction has 319 states and 423 transitions. [2018-12-01 19:18:50,841 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-12-01 19:18:50,841 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 423 transitions. [2018-12-01 19:18:50,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 714 [2018-12-01 19:18:50,843 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 19:18:50,843 INFO L402 BasicCegarLoop]: trace histogram [101, 101, 100, 100, 100, 100, 100, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 19:18:50,843 INFO L423 AbstractCegarLoop]: === Iteration 101 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 19:18:50,843 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 19:18:50,844 INFO L82 PathProgramCache]: Analyzing trace with hash 418888361, now seen corresponding path program 100 times [2018-12-01 19:18:50,844 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 19:18:50,844 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 19:18:50,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:18:50,844 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 19:18:50,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:18:50,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:18:58,938 INFO L134 CoverageAnalysis]: Checked inductivity of 35050 backedges. 15050 proven. 0 refuted. 0 times theorem prover too weak. 20000 trivial. 0 not checked. [2018-12-01 19:18:58,939 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-01 19:18:58,939 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [206] imperfect sequences [] total 206 [2018-12-01 19:18:58,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 206 states [2018-12-01 19:18:58,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 206 interpolants. [2018-12-01 19:18:58,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10409, Invalid=31821, Unknown=0, NotChecked=0, Total=42230 [2018-12-01 19:18:58,941 INFO L87 Difference]: Start difference. First operand 319 states and 423 transitions. Second operand 206 states. [2018-12-01 19:19:05,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 19:19:05,071 INFO L93 Difference]: Finished difference Result 625 states and 830 transitions. [2018-12-01 19:19:05,071 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 206 states. [2018-12-01 19:19:05,071 INFO L78 Accepts]: Start accepts. Automaton has 206 states. Word has length 713 [2018-12-01 19:19:05,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 19:19:05,074 INFO L225 Difference]: With dead ends: 625 [2018-12-01 19:19:05,074 INFO L226 Difference]: Without dead ends: 621 [2018-12-01 19:19:05,078 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 405 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50198 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=31213, Invalid=134029, Unknown=0, NotChecked=0, Total=165242 [2018-12-01 19:19:05,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2018-12-01 19:19:05,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 322. [2018-12-01 19:19:05,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 322 states. [2018-12-01 19:19:05,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 427 transitions. [2018-12-01 19:19:05,494 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 427 transitions. Word has length 713 [2018-12-01 19:19:05,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 19:19:05,494 INFO L480 AbstractCegarLoop]: Abstraction has 322 states and 427 transitions. [2018-12-01 19:19:05,495 INFO L481 AbstractCegarLoop]: Interpolant automaton has 206 states. [2018-12-01 19:19:05,495 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 427 transitions. [2018-12-01 19:19:05,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 716 [2018-12-01 19:19:05,499 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 19:19:05,499 INFO L402 BasicCegarLoop]: trace histogram [101, 101, 101, 100, 100, 100, 100, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 19:19:05,499 INFO L423 AbstractCegarLoop]: === Iteration 102 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 19:19:05,499 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 19:19:05,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1512877282, now seen corresponding path program 1 times [2018-12-01 19:19:05,500 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 19:19:05,500 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 19:19:05,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:19:05,500 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 19:19:05,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:19:05,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:19:05,665 INFO L134 CoverageAnalysis]: Checked inductivity of 35150 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 35050 trivial. 0 not checked. [2018-12-01 19:19:05,665 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-01 19:19:05,666 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-01 19:19:05,666 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-01 19:19:05,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-01 19:19:05,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-12-01 19:19:05,666 INFO L87 Difference]: Start difference. First operand 322 states and 427 transitions. Second operand 4 states. [2018-12-01 19:19:05,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 19:19:05,676 INFO L93 Difference]: Finished difference Result 631 states and 838 transitions. [2018-12-01 19:19:05,676 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-01 19:19:05,676 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 715 [2018-12-01 19:19:05,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 19:19:05,678 INFO L225 Difference]: With dead ends: 631 [2018-12-01 19:19:05,678 INFO L226 Difference]: Without dead ends: 324 [2018-12-01 19:19:05,678 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-12-01 19:19:05,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2018-12-01 19:19:05,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 322. [2018-12-01 19:19:05,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 322 states. [2018-12-01 19:19:05,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 426 transitions. [2018-12-01 19:19:05,776 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 426 transitions. Word has length 715 [2018-12-01 19:19:05,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 19:19:05,776 INFO L480 AbstractCegarLoop]: Abstraction has 322 states and 426 transitions. [2018-12-01 19:19:05,776 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-01 19:19:05,776 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 426 transitions. [2018-12-01 19:19:05,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 722 [2018-12-01 19:19:05,778 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 19:19:05,779 INFO L402 BasicCegarLoop]: trace histogram [102, 102, 101, 100, 100, 100, 100, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 19:19:05,779 INFO L423 AbstractCegarLoop]: === Iteration 103 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 19:19:05,779 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 19:19:05,779 INFO L82 PathProgramCache]: Analyzing trace with hash 956489533, now seen corresponding path program 1 times [2018-12-01 19:19:05,779 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 19:19:05,779 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 19:19:05,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:19:05,779 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 19:19:05,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 19:19:05,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:19:05,984 INFO L134 CoverageAnalysis]: Checked inductivity of 35554 backedges. 701 proven. 1 refuted. 0 times theorem prover too weak. 34852 trivial. 0 not checked. [2018-12-01 19:19:05,984 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 19:19:05,984 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/bin-2019/uautomizer/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 19:19:05,990 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 19:19:06,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 19:19:06,099 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 19:19:06,233 INFO L134 CoverageAnalysis]: Checked inductivity of 35554 backedges. 701 proven. 1 refuted. 0 times theorem prover too weak. 34852 trivial. 0 not checked. [2018-12-01 19:19:06,248 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 19:19:06,248 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 7 [2018-12-01 19:19:06,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-01 19:19:06,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-01 19:19:06,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-12-01 19:19:06,248 INFO L87 Difference]: Start difference. First operand 322 states and 426 transitions. Second operand 7 states. [2018-12-01 19:19:06,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 19:19:06,275 INFO L93 Difference]: Finished difference Result 327 states and 433 transitions. [2018-12-01 19:19:06,275 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-01 19:19:06,275 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 721 [2018-12-01 19:19:06,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 19:19:06,275 INFO L225 Difference]: With dead ends: 327 [2018-12-01 19:19:06,275 INFO L226 Difference]: Without dead ends: 0 [2018-12-01 19:19:06,276 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 729 GetRequests, 722 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-12-01 19:19:06,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-01 19:19:06,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-01 19:19:06,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-01 19:19:06,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-01 19:19:06,277 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 721 [2018-12-01 19:19:06,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 19:19:06,277 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-01 19:19:06,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-01 19:19:06,277 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-01 19:19:06,277 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-01 19:19:06,281 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-12-01 19:19:06,324 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-12-01 19:19:06,324 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-12-01 19:19:06,324 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-12-01 19:19:06,324 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-12-01 19:19:06,324 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-12-01 19:19:06,324 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-12-01 19:19:06,324 INFO L448 ceAbstractionStarter]: For program point L33(line 33) no Hoare annotation was computed. [2018-12-01 19:19:06,324 INFO L448 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 33) no Hoare annotation was computed. [2018-12-01 19:19:06,324 INFO L448 ceAbstractionStarter]: For program point L30(lines 30 34) no Hoare annotation was computed. [2018-12-01 19:19:06,324 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 26 35) the Hoare annotation is: true [2018-12-01 19:19:06,324 INFO L451 ceAbstractionStarter]: At program point L29(line 29) the Hoare annotation is: true [2018-12-01 19:19:06,324 INFO L448 ceAbstractionStarter]: For program point mainFINAL(lines 26 35) no Hoare annotation was computed. [2018-12-01 19:19:06,324 INFO L448 ceAbstractionStarter]: For program point L29-1(line 29) no Hoare annotation was computed. [2018-12-01 19:19:06,324 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 26 35) no Hoare annotation was computed. [2018-12-01 19:19:06,324 INFO L448 ceAbstractionStarter]: For program point additionFINAL(lines 13 23) no Hoare annotation was computed. [2018-12-01 19:19:06,324 INFO L444 ceAbstractionStarter]: At program point L21(line 21) the Hoare annotation is: (and (<= |addition_#in~m| addition_~m) (<= |addition_#in~n| addition_~n) (<= (+ addition_~n 1) 0)) [2018-12-01 19:19:06,325 INFO L448 ceAbstractionStarter]: For program point L20(lines 20 22) no Hoare annotation was computed. [2018-12-01 19:19:06,325 INFO L448 ceAbstractionStarter]: For program point L21-1(line 21) no Hoare annotation was computed. [2018-12-01 19:19:06,325 INFO L444 ceAbstractionStarter]: At program point L18(line 18) the Hoare annotation is: (and (<= |addition_#in~m| addition_~m) (<= |addition_#in~n| addition_~n) (<= 1 addition_~n)) [2018-12-01 19:19:06,325 INFO L448 ceAbstractionStarter]: For program point L17(lines 17 19) no Hoare annotation was computed. [2018-12-01 19:19:06,325 INFO L448 ceAbstractionStarter]: For program point L18-1(line 18) no Hoare annotation was computed. [2018-12-01 19:19:06,325 INFO L451 ceAbstractionStarter]: At program point additionENTRY(lines 13 23) the Hoare annotation is: true [2018-12-01 19:19:06,325 INFO L448 ceAbstractionStarter]: For program point L14(lines 14 16) no Hoare annotation was computed. [2018-12-01 19:19:06,325 INFO L448 ceAbstractionStarter]: For program point additionEXIT(lines 13 23) no Hoare annotation was computed. [2018-12-01 19:19:06,327 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.12 07:19:06 BoogieIcfgContainer [2018-12-01 19:19:06,327 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-01 19:19:06,327 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-01 19:19:06,327 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-01 19:19:06,327 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-01 19:19:06,327 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 07:14:32" (3/4) ... [2018-12-01 19:19:06,330 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-12-01 19:19:06,334 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-12-01 19:19:06,334 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-12-01 19:19:06,334 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure addition [2018-12-01 19:19:06,337 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-12-01 19:19:06,337 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2018-12-01 19:19:06,337 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-12-01 19:19:06,360 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_794d7585-3a8d-4dfd-9445-80f5064dbb6a/bin-2019/uautomizer/witness.graphml [2018-12-01 19:19:06,360 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-01 19:19:06,360 INFO L168 Benchmark]: Toolchain (without parser) took 273861.36 ms. Allocated memory was 1.0 GB in the beginning and 1.7 GB in the end (delta: 715.7 MB). Free memory was 955.3 MB in the beginning and 570.5 MB in the end (delta: 384.8 MB). Peak memory consumption was 1.1 GB. Max. memory is 11.5 GB. [2018-12-01 19:19:06,361 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 1.0 GB. Free memory is still 976.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-01 19:19:06,361 INFO L168 Benchmark]: CACSL2BoogieTranslator took 116.38 ms. Allocated memory is still 1.0 GB. Free memory was 955.3 MB in the beginning and 944.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-01 19:19:06,362 INFO L168 Benchmark]: Boogie Procedure Inliner took 11.42 ms. Allocated memory is still 1.0 GB. Free memory is still 944.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-01 19:19:06,362 INFO L168 Benchmark]: Boogie Preprocessor took 10.12 ms. Allocated memory is still 1.0 GB. Free memory is still 944.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-01 19:19:06,362 INFO L168 Benchmark]: RCFGBuilder took 148.53 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 112.7 MB). Free memory was 939.2 MB in the beginning and 1.1 GB in the end (delta: -160.0 MB). Peak memory consumption was 12.8 MB. Max. memory is 11.5 GB. [2018-12-01 19:19:06,362 INFO L168 Benchmark]: TraceAbstraction took 273539.37 ms. Allocated memory was 1.1 GB in the beginning and 1.7 GB in the end (delta: 602.9 MB). Free memory was 1.1 GB in the beginning and 570.5 MB in the end (delta: 528.7 MB). Peak memory consumption was 1.1 GB. Max. memory is 11.5 GB. [2018-12-01 19:19:06,362 INFO L168 Benchmark]: Witness Printer took 33.06 ms. Allocated memory is still 1.7 GB. Free memory was 570.5 MB in the beginning and 570.5 MB in the end (delta: 2.1 kB). Peak memory consumption was 2.1 kB. Max. memory is 11.5 GB. [2018-12-01 19:19:06,363 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 1.0 GB. Free memory is still 976.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 116.38 ms. Allocated memory is still 1.0 GB. Free memory was 955.3 MB in the beginning and 944.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 11.42 ms. Allocated memory is still 1.0 GB. Free memory is still 944.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 10.12 ms. Allocated memory is still 1.0 GB. Free memory is still 944.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 148.53 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 112.7 MB). Free memory was 939.2 MB in the beginning and 1.1 GB in the end (delta: -160.0 MB). Peak memory consumption was 12.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 273539.37 ms. Allocated memory was 1.1 GB in the beginning and 1.7 GB in the end (delta: 602.9 MB). Free memory was 1.1 GB in the beginning and 570.5 MB in the end (delta: 528.7 MB). Peak memory consumption was 1.1 GB. Max. memory is 11.5 GB. * Witness Printer took 33.06 ms. Allocated memory is still 1.7 GB. Free memory was 570.5 MB in the beginning and 570.5 MB in the end (delta: 2.1 kB). Peak memory consumption was 2.1 kB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 33]: 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, 24 locations, 1 error locations. SAFE Result, 273.5s OverallTime, 103 OverallIterations, 102 TraceHistogramMax, 146.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1661 SDtfs, 11307 SDslu, 35346 SDs, 0 SdLazy, 30234 SolverSat, 16842 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 16.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 52528 GetRequests, 41814 SyntacticMatches, 1 SemanticMatches, 10713 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221800 ImplicationChecksByTransitivity, 194.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=322occurred in iteration=101, 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: 3.1s AutomataMinimizationTime, 103 MinimizatonAttempts, 301 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 14 PreInvPairs, 16 NumberOfFragments, 28 HoareAnnotationTreeSize, 14 FomulaSimplifications, 26 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 7 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 1.2s SsaConstructionTime, 12.9s SatisfiabilityAnalysisTime, 99.7s InterpolantComputationTime, 74757 NumberOfCodeBlocks, 74757 NumberOfCodeBlocksAsserted, 2719 NumberOfCheckSat, 74554 ConstructedInterpolants, 0 QuantifiedInterpolants, 94568022 SizeOfPredicates, 5150 NumberOfNonLiveVariables, 100270 ConjunctsInSsa, 10300 ConjunctsInUnsatCore, 203 InterpolantComputations, 3 PerfectInterpolantSequences, 1454706/2444708 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...