./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 0cd3be1d Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/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_0480de17-b901-4be8-aa4b-f0aa0720d748/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/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 0.1.23-0cd3be1 [2018-11-28 12:25:38,106 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-28 12:25:38,107 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-28 12:25:38,115 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-28 12:25:38,115 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-28 12:25:38,116 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-28 12:25:38,116 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-28 12:25:38,118 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-28 12:25:38,119 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-28 12:25:38,119 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-28 12:25:38,120 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-28 12:25:38,120 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-28 12:25:38,121 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-28 12:25:38,121 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-28 12:25:38,122 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-28 12:25:38,123 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-28 12:25:38,124 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-28 12:25:38,125 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-28 12:25:38,126 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-28 12:25:38,127 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-28 12:25:38,128 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-28 12:25:38,129 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-28 12:25:38,131 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-28 12:25:38,131 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-28 12:25:38,131 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-28 12:25:38,132 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-28 12:25:38,132 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-28 12:25:38,133 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-28 12:25:38,134 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-28 12:25:38,134 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-28 12:25:38,134 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-28 12:25:38,135 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-28 12:25:38,135 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-28 12:25:38,135 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-28 12:25:38,136 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-28 12:25:38,136 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-28 12:25:38,137 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-11-28 12:25:38,147 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-28 12:25:38,147 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-28 12:25:38,147 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-28 12:25:38,148 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-11-28 12:25:38,148 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-28 12:25:38,148 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-28 12:25:38,148 INFO L133 SettingsManager]: * Use SBE=true [2018-11-28 12:25:38,149 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-28 12:25:38,149 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-28 12:25:38,149 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-28 12:25:38,149 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-28 12:25:38,149 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-28 12:25:38,149 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-28 12:25:38,149 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-28 12:25:38,149 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-28 12:25:38,150 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-28 12:25:38,150 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-28 12:25:38,150 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-28 12:25:38,150 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-28 12:25:38,150 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-28 12:25:38,150 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-28 12:25:38,150 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-28 12:25:38,151 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-28 12:25:38,151 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-28 12:25:38,151 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-28 12:25:38,151 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-28 12:25:38,151 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-28 12:25:38,151 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-28 12:25:38,151 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-28 12:25:38,151 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-28 12:25:38,152 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_0480de17-b901-4be8-aa4b-f0aa0720d748/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 [2018-11-28 12:25:38,176 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-28 12:25:38,186 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-28 12:25:38,188 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-28 12:25:38,189 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-28 12:25:38,190 INFO L276 PluginConnector]: CDTParser initialized [2018-11-28 12:25:38,190 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/bin-2019/uautomizer/../../sv-benchmarks/c/recursive/Addition03_true-unreach-call_true-no-overflow_true-termination.c [2018-11-28 12:25:38,234 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/bin-2019/uautomizer/data/bc563ed78/c26c6e54ac5e49f8aad68ff62c48e61e/FLAGdd9a05f7d [2018-11-28 12:25:38,564 INFO L307 CDTParser]: Found 1 translation units. [2018-11-28 12:25:38,564 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/sv-benchmarks/c/recursive/Addition03_true-unreach-call_true-no-overflow_true-termination.c [2018-11-28 12:25:38,569 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/bin-2019/uautomizer/data/bc563ed78/c26c6e54ac5e49f8aad68ff62c48e61e/FLAGdd9a05f7d [2018-11-28 12:25:38,992 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/bin-2019/uautomizer/data/bc563ed78/c26c6e54ac5e49f8aad68ff62c48e61e [2018-11-28 12:25:38,994 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-28 12:25:38,996 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-28 12:25:38,996 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-28 12:25:38,996 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-28 12:25:38,999 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-28 12:25:39,000 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 12:25:38" (1/1) ... [2018-11-28 12:25:39,002 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53951666 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:39, skipping insertion in model container [2018-11-28 12:25:39,003 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 12:25:38" (1/1) ... [2018-11-28 12:25:39,007 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-28 12:25:39,016 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-28 12:25:39,111 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 12:25:39,113 INFO L191 MainTranslator]: Completed pre-run [2018-11-28 12:25:39,124 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 12:25:39,132 INFO L195 MainTranslator]: Completed translation [2018-11-28 12:25:39,133 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:39 WrapperNode [2018-11-28 12:25:39,133 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-28 12:25:39,133 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-28 12:25:39,133 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-28 12:25:39,133 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-28 12:25:39,138 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:39" (1/1) ... [2018-11-28 12:25:39,142 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:39" (1/1) ... [2018-11-28 12:25:39,146 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-28 12:25:39,146 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-28 12:25:39,146 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-28 12:25:39,146 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-28 12:25:39,151 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:39" (1/1) ... [2018-11-28 12:25:39,152 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:39" (1/1) ... [2018-11-28 12:25:39,152 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:39" (1/1) ... [2018-11-28 12:25:39,152 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:39" (1/1) ... [2018-11-28 12:25:39,154 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:39" (1/1) ... [2018-11-28 12:25:39,155 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:39" (1/1) ... [2018-11-28 12:25:39,156 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:39" (1/1) ... [2018-11-28 12:25:39,157 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-28 12:25:39,157 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-28 12:25:39,157 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-28 12:25:39,157 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-28 12:25:39,158 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:39" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/bin-2019/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-28 12:25:39,225 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-28 12:25:39,225 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-28 12:25:39,225 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-28 12:25:39,225 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-28 12:25:39,225 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-28 12:25:39,225 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-28 12:25:39,225 INFO L130 BoogieDeclarations]: Found specification of procedure addition [2018-11-28 12:25:39,225 INFO L138 BoogieDeclarations]: Found implementation of procedure addition [2018-11-28 12:25:39,331 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-28 12:25:39,331 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-11-28 12:25:39,331 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 12:25:39 BoogieIcfgContainer [2018-11-28 12:25:39,334 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-28 12:25:39,335 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-28 12:25:39,335 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-28 12:25:39,337 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-28 12:25:39,337 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 12:25:38" (1/3) ... [2018-11-28 12:25:39,338 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4898e27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 12:25:39, skipping insertion in model container [2018-11-28 12:25:39,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:39" (2/3) ... [2018-11-28 12:25:39,338 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4898e27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 12:25:39, skipping insertion in model container [2018-11-28 12:25:39,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 12:25:39" (3/3) ... [2018-11-28 12:25:39,339 INFO L112 eAbstractionObserver]: Analyzing ICFG Addition03_true-unreach-call_true-no-overflow_true-termination.c [2018-11-28 12:25:39,345 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-28 12:25:39,350 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-28 12:25:39,359 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-28 12:25:39,383 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-28 12:25:39,384 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-28 12:25:39,384 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-28 12:25:39,384 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-28 12:25:39,384 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-28 12:25:39,384 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-28 12:25:39,385 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-28 12:25:39,385 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-28 12:25:39,385 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-28 12:25:39,399 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2018-11-28 12:25:39,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-28 12:25:39,405 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:25:39,405 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:25:39,407 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:25:39,412 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:25:39,412 INFO L82 PathProgramCache]: Analyzing trace with hash 1540493149, now seen corresponding path program 1 times [2018-11-28 12:25:39,415 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:25:39,416 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:25:39,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:25:39,449 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:25:39,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:25:39,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:25:39,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:25:39,546 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 12:25:39,546 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-28 12:25:39,548 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-28 12:25:39,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-28 12:25:39,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-28 12:25:39,561 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2018-11-28 12:25:39,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:25:39,647 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2018-11-28 12:25:39,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-28 12:25:39,649 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-11-28 12:25:39,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:25:39,656 INFO L225 Difference]: With dead ends: 36 [2018-11-28 12:25:39,656 INFO L226 Difference]: Without dead ends: 22 [2018-11-28 12:25:39,658 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 [2018-11-28 12:25:39,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-11-28 12:25:39,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-11-28 12:25:39,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-11-28 12:25:39,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2018-11-28 12:25:39,684 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 13 [2018-11-28 12:25:39,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:25:39,684 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2018-11-28 12:25:39,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-28 12:25:39,685 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2018-11-28 12:25:39,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-11-28 12:25:39,686 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:25:39,686 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:25:39,686 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:25:39,687 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:25:39,687 INFO L82 PathProgramCache]: Analyzing trace with hash -35294164, now seen corresponding path program 1 times [2018-11-28 12:25:39,687 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:25:39,687 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:25:39,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:25:39,688 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:25:39,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:25:39,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:25:39,755 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-28 12:25:39,755 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:25:39,755 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/bin-2019/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:25:39,762 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:25:39,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:25:39,780 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:25:39,810 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-28 12:25:39,835 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:25:39,835 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-11-28 12:25:39,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-28 12:25:39,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-28 12:25:39,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-11-28 12:25:39,836 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand 6 states. [2018-11-28 12:25:39,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:25:39,920 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2018-11-28 12:25:39,920 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-28 12:25:39,920 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2018-11-28 12:25:39,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:25:39,921 INFO L225 Difference]: With dead ends: 29 [2018-11-28 12:25:39,921 INFO L226 Difference]: Without dead ends: 25 [2018-11-28 12:25:39,922 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 [2018-11-28 12:25:39,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-11-28 12:25:39,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-11-28 12:25:39,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-11-28 12:25:39,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2018-11-28 12:25:39,926 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 20 [2018-11-28 12:25:39,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:25:39,926 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2018-11-28 12:25:39,926 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-28 12:25:39,926 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2018-11-28 12:25:39,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-11-28 12:25:39,927 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:25:39,927 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:25:39,927 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:25:39,927 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:25:39,928 INFO L82 PathProgramCache]: Analyzing trace with hash -1261456781, now seen corresponding path program 2 times [2018-11-28 12:25:39,928 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:25:39,928 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:25:39,928 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:25:39,928 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:25:39,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:25:39,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:25:40,001 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-11-28 12:25:40,001 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:25:40,001 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/bin-2019/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:25:40,009 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 12:25:40,022 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 12:25:40,022 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:25:40,024 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:25:40,030 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-11-28 12:25:40,044 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:25:40,045 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-11-28 12:25:40,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-28 12:25:40,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-28 12:25:40,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-11-28 12:25:40,046 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand 7 states. [2018-11-28 12:25:40,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:25:40,115 INFO L93 Difference]: Finished difference Result 32 states and 39 transitions. [2018-11-28 12:25:40,115 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-28 12:25:40,115 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2018-11-28 12:25:40,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:25:40,116 INFO L225 Difference]: With dead ends: 32 [2018-11-28 12:25:40,116 INFO L226 Difference]: Without dead ends: 28 [2018-11-28 12:25:40,117 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 [2018-11-28 12:25:40,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-11-28 12:25:40,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-11-28 12:25:40,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-11-28 12:25:40,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2018-11-28 12:25:40,121 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 27 [2018-11-28 12:25:40,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:25:40,122 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2018-11-28 12:25:40,122 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-28 12:25:40,122 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2018-11-28 12:25:40,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-11-28 12:25:40,123 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:25:40,123 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:25:40,123 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:25:40,123 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:25:40,123 INFO L82 PathProgramCache]: Analyzing trace with hash 2131329174, now seen corresponding path program 3 times [2018-11-28 12:25:40,124 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:25:40,124 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:25:40,124 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:25:40,124 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:25:40,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:25:40,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:25:40,191 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-11-28 12:25:40,192 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:25:40,192 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/bin-2019/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:25:40,202 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 12:25:40,222 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-11-28 12:25:40,223 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:25:40,224 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:25:40,235 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-11-28 12:25:40,250 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:25:40,250 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-11-28 12:25:40,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-28 12:25:40,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-28 12:25:40,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-11-28 12:25:40,251 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand 8 states. [2018-11-28 12:25:40,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:25:40,325 INFO L93 Difference]: Finished difference Result 35 states and 43 transitions. [2018-11-28 12:25:40,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-28 12:25:40,325 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 34 [2018-11-28 12:25:40,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:25:40,326 INFO L225 Difference]: With dead ends: 35 [2018-11-28 12:25:40,326 INFO L226 Difference]: Without dead ends: 31 [2018-11-28 12:25:40,327 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 [2018-11-28 12:25:40,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-11-28 12:25:40,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-11-28 12:25:40,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-11-28 12:25:40,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2018-11-28 12:25:40,333 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 34 [2018-11-28 12:25:40,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:25:40,334 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2018-11-28 12:25:40,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-28 12:25:40,334 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2018-11-28 12:25:40,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-11-28 12:25:40,335 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:25:40,335 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:25:40,336 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:25:40,336 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:25:40,336 INFO L82 PathProgramCache]: Analyzing trace with hash -867295607, now seen corresponding path program 4 times [2018-11-28 12:25:40,336 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:25:40,336 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:25:40,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:25:40,337 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:25:40,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:25:40,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:25:40,438 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2018-11-28 12:25:40,438 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:25:40,438 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/bin-2019/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:25:40,449 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 12:25:40,462 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 12:25:40,462 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:25:40,465 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:25:40,479 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2018-11-28 12:25:40,493 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:25:40,493 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-11-28 12:25:40,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-28 12:25:40,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-28 12:25:40,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-11-28 12:25:40,494 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand 9 states. [2018-11-28 12:25:40,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:25:40,576 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2018-11-28 12:25:40,577 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-28 12:25:40,577 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 41 [2018-11-28 12:25:40,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:25:40,577 INFO L225 Difference]: With dead ends: 38 [2018-11-28 12:25:40,578 INFO L226 Difference]: Without dead ends: 34 [2018-11-28 12:25:40,578 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 [2018-11-28 12:25:40,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-11-28 12:25:40,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-11-28 12:25:40,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-11-28 12:25:40,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2018-11-28 12:25:40,584 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 41 [2018-11-28 12:25:40,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:25:40,584 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2018-11-28 12:25:40,584 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-28 12:25:40,584 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2018-11-28 12:25:40,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-11-28 12:25:40,585 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:25:40,586 INFO L402 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:25:40,586 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:25:40,586 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:25:40,586 INFO L82 PathProgramCache]: Analyzing trace with hash -943688704, now seen corresponding path program 5 times [2018-11-28 12:25:40,586 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:25:40,586 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:25:40,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:25:40,587 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:25:40,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:25:40,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:25:40,674 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2018-11-28 12:25:40,674 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:25:40,674 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/bin-2019/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:25:40,680 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-28 12:25:40,713 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-11-28 12:25:40,714 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:25:40,715 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:25:40,728 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2018-11-28 12:25:40,742 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:25:40,742 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-11-28 12:25:40,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-28 12:25:40,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-28 12:25:40,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-11-28 12:25:40,743 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand 10 states. [2018-11-28 12:25:40,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:25:40,833 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2018-11-28 12:25:40,834 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-28 12:25:40,834 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 48 [2018-11-28 12:25:40,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:25:40,836 INFO L225 Difference]: With dead ends: 41 [2018-11-28 12:25:40,836 INFO L226 Difference]: Without dead ends: 37 [2018-11-28 12:25:40,836 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 [2018-11-28 12:25:40,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-11-28 12:25:40,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-11-28 12:25:40,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-11-28 12:25:40,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2018-11-28 12:25:40,843 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 48 [2018-11-28 12:25:40,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:25:40,843 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2018-11-28 12:25:40,844 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-28 12:25:40,844 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2018-11-28 12:25:40,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-11-28 12:25:40,845 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:25:40,845 INFO L402 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:25:40,845 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:25:40,846 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:25:40,846 INFO L82 PathProgramCache]: Analyzing trace with hash 1959654303, now seen corresponding path program 6 times [2018-11-28 12:25:40,846 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:25:40,846 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:25:40,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:25:40,847 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:25:40,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:25:40,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:25:40,935 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-11-28 12:25:40,935 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:25:40,935 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/bin-2019/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:25:40,945 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-28 12:25:40,970 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-11-28 12:25:40,971 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:25:40,972 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:25:40,985 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-11-28 12:25:41,000 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:25:41,000 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-11-28 12:25:41,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-28 12:25:41,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-28 12:25:41,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2018-11-28 12:25:41,001 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand 11 states. [2018-11-28 12:25:41,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:25:41,076 INFO L93 Difference]: Finished difference Result 44 states and 55 transitions. [2018-11-28 12:25:41,077 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-28 12:25:41,077 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 55 [2018-11-28 12:25:41,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:25:41,078 INFO L225 Difference]: With dead ends: 44 [2018-11-28 12:25:41,078 INFO L226 Difference]: Without dead ends: 40 [2018-11-28 12:25:41,078 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 [2018-11-28 12:25:41,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-11-28 12:25:41,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-11-28 12:25:41,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-11-28 12:25:41,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2018-11-28 12:25:41,084 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 55 [2018-11-28 12:25:41,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:25:41,084 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2018-11-28 12:25:41,084 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-28 12:25:41,084 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2018-11-28 12:25:41,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-11-28 12:25:41,085 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:25:41,085 INFO L402 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:25:41,086 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:25:41,086 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:25:41,086 INFO L82 PathProgramCache]: Analyzing trace with hash 75083370, now seen corresponding path program 7 times [2018-11-28 12:25:41,086 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:25:41,086 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:25:41,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:25:41,087 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:25:41,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:25:41,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:25:41,174 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2018-11-28 12:25:41,174 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:25:41,174 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/bin-2019/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:25:41,180 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:25:41,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:25:41,194 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:25:41,207 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2018-11-28 12:25:41,222 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:25:41,222 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-11-28 12:25:41,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-28 12:25:41,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-28 12:25:41,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2018-11-28 12:25:41,223 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand 12 states. [2018-11-28 12:25:41,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:25:41,313 INFO L93 Difference]: Finished difference Result 47 states and 59 transitions. [2018-11-28 12:25:41,313 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-28 12:25:41,313 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 62 [2018-11-28 12:25:41,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:25:41,314 INFO L225 Difference]: With dead ends: 47 [2018-11-28 12:25:41,314 INFO L226 Difference]: Without dead ends: 43 [2018-11-28 12:25:41,315 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 [2018-11-28 12:25:41,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-11-28 12:25:41,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-11-28 12:25:41,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-11-28 12:25:41,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 55 transitions. [2018-11-28 12:25:41,321 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 55 transitions. Word has length 62 [2018-11-28 12:25:41,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:25:41,322 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 55 transitions. [2018-11-28 12:25:41,322 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-28 12:25:41,322 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 55 transitions. [2018-11-28 12:25:41,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-11-28 12:25:41,322 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:25:41,323 INFO L402 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:25:41,323 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:25:41,324 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:25:41,324 INFO L82 PathProgramCache]: Analyzing trace with hash 980406709, now seen corresponding path program 8 times [2018-11-28 12:25:41,324 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:25:41,324 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:25:41,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:25:41,325 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:25:41,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:25:41,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:25:41,428 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2018-11-28 12:25:41,428 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:25:41,428 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/bin-2019/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:25:41,439 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 12:25:41,461 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 12:25:41,462 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:25:41,464 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:25:41,481 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2018-11-28 12:25:41,496 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:25:41,496 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-11-28 12:25:41,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-28 12:25:41,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-28 12:25:41,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2018-11-28 12:25:41,497 INFO L87 Difference]: Start difference. First operand 43 states and 55 transitions. Second operand 13 states. [2018-11-28 12:25:41,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:25:41,621 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2018-11-28 12:25:41,621 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-28 12:25:41,621 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 69 [2018-11-28 12:25:41,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:25:41,622 INFO L225 Difference]: With dead ends: 50 [2018-11-28 12:25:41,622 INFO L226 Difference]: Without dead ends: 46 [2018-11-28 12:25:41,623 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2018-11-28 12:25:41,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-11-28 12:25:41,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-11-28 12:25:41,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-11-28 12:25:41,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 59 transitions. [2018-11-28 12:25:41,629 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 59 transitions. Word has length 69 [2018-11-28 12:25:41,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:25:41,629 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 59 transitions. [2018-11-28 12:25:41,629 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-28 12:25:41,629 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 59 transitions. [2018-11-28 12:25:41,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-11-28 12:25:41,630 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:25:41,630 INFO L402 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:25:41,630 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:25:41,630 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:25:41,631 INFO L82 PathProgramCache]: Analyzing trace with hash -654012460, now seen corresponding path program 9 times [2018-11-28 12:25:41,631 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:25:41,631 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:25:41,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:25:41,631 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:25:41,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:25:41,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:25:41,735 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2018-11-28 12:25:41,735 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:25:41,735 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/bin-2019/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:25:41,743 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 12:25:41,762 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-11-28 12:25:41,762 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:25:41,764 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:25:41,783 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2018-11-28 12:25:41,806 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:25:41,806 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-11-28 12:25:41,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-28 12:25:41,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-28 12:25:41,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2018-11-28 12:25:41,807 INFO L87 Difference]: Start difference. First operand 46 states and 59 transitions. Second operand 14 states. [2018-11-28 12:25:41,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:25:41,960 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2018-11-28 12:25:41,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-28 12:25:41,960 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 76 [2018-11-28 12:25:41,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:25:41,961 INFO L225 Difference]: With dead ends: 53 [2018-11-28 12:25:41,961 INFO L226 Difference]: Without dead ends: 49 [2018-11-28 12:25:41,961 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 [2018-11-28 12:25:41,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-11-28 12:25:41,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-11-28 12:25:41,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-11-28 12:25:41,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 63 transitions. [2018-11-28 12:25:41,967 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 63 transitions. Word has length 76 [2018-11-28 12:25:41,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:25:41,968 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 63 transitions. [2018-11-28 12:25:41,968 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-28 12:25:41,968 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 63 transitions. [2018-11-28 12:25:41,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-11-28 12:25:41,968 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:25:41,969 INFO L402 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:25:41,969 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:25:41,969 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:25:41,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1057728309, now seen corresponding path program 10 times [2018-11-28 12:25:41,969 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:25:41,969 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:25:41,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:25:41,970 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:25:41,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:25:41,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:25:42,076 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2018-11-28 12:25:42,076 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:25:42,076 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/bin-2019/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:25:42,084 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 12:25:42,099 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 12:25:42,099 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:25:42,101 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:25:42,116 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2018-11-28 12:25:42,131 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:25:42,132 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-11-28 12:25:42,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-28 12:25:42,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-28 12:25:42,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2018-11-28 12:25:42,132 INFO L87 Difference]: Start difference. First operand 49 states and 63 transitions. Second operand 15 states. [2018-11-28 12:25:42,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:25:42,329 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2018-11-28 12:25:42,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-28 12:25:42,329 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 83 [2018-11-28 12:25:42,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:25:42,330 INFO L225 Difference]: With dead ends: 56 [2018-11-28 12:25:42,330 INFO L226 Difference]: Without dead ends: 52 [2018-11-28 12:25:42,331 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 [2018-11-28 12:25:42,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-11-28 12:25:42,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-11-28 12:25:42,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-11-28 12:25:42,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 67 transitions. [2018-11-28 12:25:42,337 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 67 transitions. Word has length 83 [2018-11-28 12:25:42,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:25:42,337 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 67 transitions. [2018-11-28 12:25:42,337 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-28 12:25:42,337 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 67 transitions. [2018-11-28 12:25:42,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-11-28 12:25:42,338 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:25:42,338 INFO L402 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:25:42,338 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:25:42,338 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:25:42,338 INFO L82 PathProgramCache]: Analyzing trace with hash -2104461250, now seen corresponding path program 11 times [2018-11-28 12:25:42,338 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:25:42,338 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:25:42,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:25:42,339 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:25:42,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:25:42,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:25:42,465 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2018-11-28 12:25:42,465 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:25:42,465 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/bin-2019/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:25:42,484 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-28 12:25:42,541 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-11-28 12:25:42,542 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:25:42,544 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:25:42,562 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2018-11-28 12:25:42,578 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:25:42,578 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-11-28 12:25:42,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-28 12:25:42,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-28 12:25:42,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2018-11-28 12:25:42,579 INFO L87 Difference]: Start difference. First operand 52 states and 67 transitions. Second operand 16 states. [2018-11-28 12:25:42,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:25:42,763 INFO L93 Difference]: Finished difference Result 59 states and 75 transitions. [2018-11-28 12:25:42,764 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-28 12:25:42,765 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 90 [2018-11-28 12:25:42,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:25:42,765 INFO L225 Difference]: With dead ends: 59 [2018-11-28 12:25:42,766 INFO L226 Difference]: Without dead ends: 55 [2018-11-28 12:25:42,766 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 [2018-11-28 12:25:42,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-11-28 12:25:42,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-11-28 12:25:42,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-11-28 12:25:42,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 71 transitions. [2018-11-28 12:25:42,772 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 71 transitions. Word has length 90 [2018-11-28 12:25:42,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:25:42,772 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 71 transitions. [2018-11-28 12:25:42,772 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-28 12:25:42,773 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 71 transitions. [2018-11-28 12:25:42,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-11-28 12:25:42,773 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:25:42,774 INFO L402 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:25:42,774 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:25:42,774 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:25:42,774 INFO L82 PathProgramCache]: Analyzing trace with hash 565979361, now seen corresponding path program 12 times [2018-11-28 12:25:42,777 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:25:42,777 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:25:42,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:25:42,778 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:25:42,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:25:42,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:25:42,901 INFO L134 CoverageAnalysis]: Checked inductivity of 510 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2018-11-28 12:25:42,901 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:25:42,901 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/bin-2019/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:25:42,908 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-28 12:25:42,931 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-11-28 12:25:42,931 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:25:42,934 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:25:42,955 INFO L134 CoverageAnalysis]: Checked inductivity of 510 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2018-11-28 12:25:42,981 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:25:42,981 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-11-28 12:25:42,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-28 12:25:42,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-28 12:25:42,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2018-11-28 12:25:42,982 INFO L87 Difference]: Start difference. First operand 55 states and 71 transitions. Second operand 17 states. [2018-11-28 12:25:43,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:25:43,170 INFO L93 Difference]: Finished difference Result 62 states and 79 transitions. [2018-11-28 12:25:43,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-28 12:25:43,170 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 97 [2018-11-28 12:25:43,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:25:43,171 INFO L225 Difference]: With dead ends: 62 [2018-11-28 12:25:43,171 INFO L226 Difference]: Without dead ends: 58 [2018-11-28 12:25:43,171 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 [2018-11-28 12:25:43,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-11-28 12:25:43,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-11-28 12:25:43,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-11-28 12:25:43,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 75 transitions. [2018-11-28 12:25:43,176 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 75 transitions. Word has length 97 [2018-11-28 12:25:43,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:25:43,176 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 75 transitions. [2018-11-28 12:25:43,176 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-28 12:25:43,176 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 75 transitions. [2018-11-28 12:25:43,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-11-28 12:25:43,177 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:25:43,177 INFO L402 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:25:43,178 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:25:43,178 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:25:43,178 INFO L82 PathProgramCache]: Analyzing trace with hash -106117208, now seen corresponding path program 13 times [2018-11-28 12:25:43,178 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:25:43,178 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:25:43,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:25:43,179 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:25:43,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:25:43,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:25:43,322 INFO L134 CoverageAnalysis]: Checked inductivity of 598 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2018-11-28 12:25:43,323 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:25:43,323 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/bin-2019/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:25:43,331 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:25:43,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:25:43,363 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:25:43,384 INFO L134 CoverageAnalysis]: Checked inductivity of 598 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2018-11-28 12:25:43,399 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:25:43,400 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-11-28 12:25:43,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-28 12:25:43,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-28 12:25:43,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2018-11-28 12:25:43,401 INFO L87 Difference]: Start difference. First operand 58 states and 75 transitions. Second operand 18 states. [2018-11-28 12:25:43,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:25:43,575 INFO L93 Difference]: Finished difference Result 65 states and 83 transitions. [2018-11-28 12:25:43,575 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-11-28 12:25:43,575 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 104 [2018-11-28 12:25:43,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:25:43,576 INFO L225 Difference]: With dead ends: 65 [2018-11-28 12:25:43,576 INFO L226 Difference]: Without dead ends: 61 [2018-11-28 12:25:43,577 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=362, Invalid=630, Unknown=0, NotChecked=0, Total=992 [2018-11-28 12:25:43,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-11-28 12:25:43,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-11-28 12:25:43,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-11-28 12:25:43,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 79 transitions. [2018-11-28 12:25:43,582 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 79 transitions. Word has length 104 [2018-11-28 12:25:43,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:25:43,583 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 79 transitions. [2018-11-28 12:25:43,583 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-28 12:25:43,583 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 79 transitions. [2018-11-28 12:25:43,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-11-28 12:25:43,583 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:25:43,583 INFO L402 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:25:43,584 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:25:43,584 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:25:43,584 INFO L82 PathProgramCache]: Analyzing trace with hash 1237836279, now seen corresponding path program 14 times [2018-11-28 12:25:43,584 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:25:43,584 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:25:43,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:25:43,584 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:25:43,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:25:43,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:25:43,752 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2018-11-28 12:25:43,753 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:25:43,753 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/bin-2019/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:25:43,769 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 12:25:43,796 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 12:25:43,797 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:25:43,800 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:25:43,823 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2018-11-28 12:25:43,848 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:25:43,848 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-11-28 12:25:43,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-11-28 12:25:43,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-11-28 12:25:43,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2018-11-28 12:25:43,849 INFO L87 Difference]: Start difference. First operand 61 states and 79 transitions. Second operand 19 states. [2018-11-28 12:25:44,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:25:44,062 INFO L93 Difference]: Finished difference Result 68 states and 87 transitions. [2018-11-28 12:25:44,062 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-28 12:25:44,062 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 111 [2018-11-28 12:25:44,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:25:44,063 INFO L225 Difference]: With dead ends: 68 [2018-11-28 12:25:44,063 INFO L226 Difference]: Without dead ends: 64 [2018-11-28 12:25:44,064 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=410, Invalid=712, Unknown=0, NotChecked=0, Total=1122 [2018-11-28 12:25:44,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-11-28 12:25:44,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-11-28 12:25:44,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-11-28 12:25:44,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 83 transitions. [2018-11-28 12:25:44,068 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 83 transitions. Word has length 111 [2018-11-28 12:25:44,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:25:44,069 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 83 transitions. [2018-11-28 12:25:44,069 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-11-28 12:25:44,069 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 83 transitions. [2018-11-28 12:25:44,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-11-28 12:25:44,070 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:25:44,072 INFO L402 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:25:44,072 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:25:44,073 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:25:44,073 INFO L82 PathProgramCache]: Analyzing trace with hash 340319762, now seen corresponding path program 15 times [2018-11-28 12:25:44,073 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:25:44,073 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:25:44,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:25:44,074 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:25:44,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:25:44,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:25:44,234 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2018-11-28 12:25:44,234 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:25:44,235 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/bin-2019/uautomizer/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:25:44,243 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 12:25:44,276 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-11-28 12:25:44,276 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:25:44,278 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:25:44,303 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2018-11-28 12:25:44,328 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:25:44,329 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-11-28 12:25:44,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-28 12:25:44,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-28 12:25:44,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=223, Unknown=0, NotChecked=0, Total=380 [2018-11-28 12:25:44,329 INFO L87 Difference]: Start difference. First operand 64 states and 83 transitions. Second operand 20 states. [2018-11-28 12:25:44,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:25:44,511 INFO L93 Difference]: Finished difference Result 71 states and 91 transitions. [2018-11-28 12:25:44,511 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-11-28 12:25:44,511 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 118 [2018-11-28 12:25:44,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:25:44,512 INFO L225 Difference]: With dead ends: 71 [2018-11-28 12:25:44,512 INFO L226 Difference]: Without dead ends: 67 [2018-11-28 12:25:44,512 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 [2018-11-28 12:25:44,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-11-28 12:25:44,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-11-28 12:25:44,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-11-28 12:25:44,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 87 transitions. [2018-11-28 12:25:44,518 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 87 transitions. Word has length 118 [2018-11-28 12:25:44,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:25:44,518 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 87 transitions. [2018-11-28 12:25:44,518 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-28 12:25:44,518 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 87 transitions. [2018-11-28 12:25:44,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-11-28 12:25:44,519 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:25:44,519 INFO L402 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:25:44,519 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:25:44,519 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:25:44,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1471685645, now seen corresponding path program 16 times [2018-11-28 12:25:44,520 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:25:44,520 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:25:44,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:25:44,520 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:25:44,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:25:44,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:25:44,670 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 512 trivial. 0 not checked. [2018-11-28 12:25:44,670 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:25:44,670 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/bin-2019/uautomizer/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:25:44,678 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 12:25:44,704 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 12:25:44,705 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:25:44,708 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:25:44,731 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 512 trivial. 0 not checked. [2018-11-28 12:25:44,755 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:25:44,756 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-11-28 12:25:44,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-28 12:25:44,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-28 12:25:44,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=245, Unknown=0, NotChecked=0, Total=420 [2018-11-28 12:25:44,757 INFO L87 Difference]: Start difference. First operand 67 states and 87 transitions. Second operand 21 states. [2018-11-28 12:25:45,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:25:45,039 INFO L93 Difference]: Finished difference Result 74 states and 95 transitions. [2018-11-28 12:25:45,039 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-11-28 12:25:45,039 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 125 [2018-11-28 12:25:45,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:25:45,040 INFO L225 Difference]: With dead ends: 74 [2018-11-28 12:25:45,040 INFO L226 Difference]: Without dead ends: 70 [2018-11-28 12:25:45,041 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 [2018-11-28 12:25:45,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-11-28 12:25:45,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-11-28 12:25:45,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-11-28 12:25:45,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 91 transitions. [2018-11-28 12:25:45,045 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 91 transitions. Word has length 125 [2018-11-28 12:25:45,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:25:45,046 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 91 transitions. [2018-11-28 12:25:45,046 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-28 12:25:45,046 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 91 transitions. [2018-11-28 12:25:45,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-11-28 12:25:45,047 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:25:45,047 INFO L402 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:25:45,047 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:25:45,048 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:25:45,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1481368708, now seen corresponding path program 17 times [2018-11-28 12:25:45,048 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:25:45,048 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:25:45,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:25:45,048 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:25:45,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:25:45,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:25:45,281 INFO L134 CoverageAnalysis]: Checked inductivity of 1020 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 578 trivial. 0 not checked. [2018-11-28 12:25:45,281 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:25:45,281 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/bin-2019/uautomizer/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:25:45,287 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-28 12:25:45,320 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-11-28 12:25:45,320 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:25:45,323 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:25:45,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1020 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 578 trivial. 0 not checked. [2018-11-28 12:25:45,355 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:25:45,355 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-11-28 12:25:45,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-11-28 12:25:45,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-11-28 12:25:45,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=268, Unknown=0, NotChecked=0, Total=462 [2018-11-28 12:25:45,356 INFO L87 Difference]: Start difference. First operand 70 states and 91 transitions. Second operand 22 states. [2018-11-28 12:25:45,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:25:45,536 INFO L93 Difference]: Finished difference Result 77 states and 99 transitions. [2018-11-28 12:25:45,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-11-28 12:25:45,536 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 132 [2018-11-28 12:25:45,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:25:45,537 INFO L225 Difference]: With dead ends: 77 [2018-11-28 12:25:45,537 INFO L226 Difference]: Without dead ends: 73 [2018-11-28 12:25:45,538 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=572, Invalid=988, Unknown=0, NotChecked=0, Total=1560 [2018-11-28 12:25:45,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-11-28 12:25:45,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-11-28 12:25:45,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-11-28 12:25:45,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 95 transitions. [2018-11-28 12:25:45,543 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 95 transitions. Word has length 132 [2018-11-28 12:25:45,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:25:45,544 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 95 transitions. [2018-11-28 12:25:45,544 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-11-28 12:25:45,544 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 95 transitions. [2018-11-28 12:25:45,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2018-11-28 12:25:45,545 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:25:45,545 INFO L402 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:25:45,545 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:25:45,545 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:25:45,545 INFO L82 PathProgramCache]: Analyzing trace with hash -103968989, now seen corresponding path program 18 times [2018-11-28 12:25:45,545 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:25:45,545 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:25:45,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:25:45,546 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:25:45,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:25:45,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:25:45,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1143 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2018-11-28 12:25:45,762 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:25:45,762 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/bin-2019/uautomizer/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:25:45,770 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-28 12:25:45,828 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-11-28 12:25:45,829 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:25:45,831 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:25:45,853 INFO L134 CoverageAnalysis]: Checked inductivity of 1143 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2018-11-28 12:25:45,868 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:25:45,868 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-11-28 12:25:45,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-11-28 12:25:45,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-11-28 12:25:45,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=292, Unknown=0, NotChecked=0, Total=506 [2018-11-28 12:25:45,869 INFO L87 Difference]: Start difference. First operand 73 states and 95 transitions. Second operand 23 states. [2018-11-28 12:25:46,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:25:46,131 INFO L93 Difference]: Finished difference Result 80 states and 103 transitions. [2018-11-28 12:25:46,132 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-11-28 12:25:46,132 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 139 [2018-11-28 12:25:46,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:25:46,133 INFO L225 Difference]: With dead ends: 80 [2018-11-28 12:25:46,133 INFO L226 Difference]: Without dead ends: 76 [2018-11-28 12:25:46,133 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 [2018-11-28 12:25:46,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-11-28 12:25:46,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-11-28 12:25:46,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-11-28 12:25:46,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 99 transitions. [2018-11-28 12:25:46,137 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 99 transitions. Word has length 139 [2018-11-28 12:25:46,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:25:46,138 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 99 transitions. [2018-11-28 12:25:46,138 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-11-28 12:25:46,138 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 99 transitions. [2018-11-28 12:25:46,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-11-28 12:25:46,141 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:25:46,141 INFO L402 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:25:46,141 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:25:46,141 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:25:46,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1432494106, now seen corresponding path program 19 times [2018-11-28 12:25:46,141 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:25:46,141 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:25:46,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:25:46,142 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:25:46,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:25:46,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:25:46,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1273 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 722 trivial. 0 not checked. [2018-11-28 12:25:46,323 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:25:46,324 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/bin-2019/uautomizer/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:25:46,332 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:25:46,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:25:46,362 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:25:46,380 INFO L134 CoverageAnalysis]: Checked inductivity of 1273 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 722 trivial. 0 not checked. [2018-11-28 12:25:46,395 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:25:46,395 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-11-28 12:25:46,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-11-28 12:25:46,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-11-28 12:25:46,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=317, Unknown=0, NotChecked=0, Total=552 [2018-11-28 12:25:46,396 INFO L87 Difference]: Start difference. First operand 76 states and 99 transitions. Second operand 24 states. [2018-11-28 12:25:46,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:25:46,690 INFO L93 Difference]: Finished difference Result 83 states and 107 transitions. [2018-11-28 12:25:46,690 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-11-28 12:25:46,690 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 146 [2018-11-28 12:25:46,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:25:46,691 INFO L225 Difference]: With dead ends: 83 [2018-11-28 12:25:46,691 INFO L226 Difference]: Without dead ends: 79 [2018-11-28 12:25:46,692 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 [2018-11-28 12:25:46,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-11-28 12:25:46,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-11-28 12:25:46,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-11-28 12:25:46,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 103 transitions. [2018-11-28 12:25:46,696 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 103 transitions. Word has length 146 [2018-11-28 12:25:46,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:25:46,697 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 103 transitions. [2018-11-28 12:25:46,697 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-11-28 12:25:46,697 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 103 transitions. [2018-11-28 12:25:46,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2018-11-28 12:25:46,698 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:25:46,698 INFO L402 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:25:46,700 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:25:46,701 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:25:46,701 INFO L82 PathProgramCache]: Analyzing trace with hash -873938119, now seen corresponding path program 20 times [2018-11-28 12:25:46,701 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:25:46,701 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:25:46,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:25:46,702 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:25:46,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:25:46,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:25:46,907 INFO L134 CoverageAnalysis]: Checked inductivity of 1410 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2018-11-28 12:25:46,907 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:25:46,907 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/bin-2019/uautomizer/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:25:46,915 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 12:25:46,950 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 12:25:46,951 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:25:46,954 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:25:46,984 INFO L134 CoverageAnalysis]: Checked inductivity of 1410 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2018-11-28 12:25:47,000 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:25:47,000 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-11-28 12:25:47,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-11-28 12:25:47,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-11-28 12:25:47,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=343, Unknown=0, NotChecked=0, Total=600 [2018-11-28 12:25:47,000 INFO L87 Difference]: Start difference. First operand 79 states and 103 transitions. Second operand 25 states. [2018-11-28 12:25:47,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:25:47,364 INFO L93 Difference]: Finished difference Result 86 states and 111 transitions. [2018-11-28 12:25:47,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-11-28 12:25:47,365 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 153 [2018-11-28 12:25:47,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:25:47,366 INFO L225 Difference]: With dead ends: 86 [2018-11-28 12:25:47,366 INFO L226 Difference]: Without dead ends: 82 [2018-11-28 12:25:47,367 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 [2018-11-28 12:25:47,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-11-28 12:25:47,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-11-28 12:25:47,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-11-28 12:25:47,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 107 transitions. [2018-11-28 12:25:47,375 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 107 transitions. Word has length 153 [2018-11-28 12:25:47,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:25:47,376 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 107 transitions. [2018-11-28 12:25:47,376 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-11-28 12:25:47,376 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 107 transitions. [2018-11-28 12:25:47,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-11-28 12:25:47,378 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:25:47,378 INFO L402 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:25:47,378 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:25:47,378 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:25:47,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1461029712, now seen corresponding path program 21 times [2018-11-28 12:25:47,378 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:25:47,379 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:25:47,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:25:47,379 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:25:47,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:25:47,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:25:47,643 INFO L134 CoverageAnalysis]: Checked inductivity of 1554 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 882 trivial. 0 not checked. [2018-11-28 12:25:47,643 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:25:47,643 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/bin-2019/uautomizer/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:25:47,657 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 12:25:47,731 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-11-28 12:25:47,731 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:25:47,735 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:25:47,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1554 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 882 trivial. 0 not checked. [2018-11-28 12:25:47,771 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:25:47,772 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-11-28 12:25:47,772 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-11-28 12:25:47,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-11-28 12:25:47,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=370, Unknown=0, NotChecked=0, Total=650 [2018-11-28 12:25:47,772 INFO L87 Difference]: Start difference. First operand 82 states and 107 transitions. Second operand 26 states. [2018-11-28 12:25:48,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:25:48,123 INFO L93 Difference]: Finished difference Result 89 states and 115 transitions. [2018-11-28 12:25:48,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-11-28 12:25:48,125 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 160 [2018-11-28 12:25:48,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:25:48,126 INFO L225 Difference]: With dead ends: 89 [2018-11-28 12:25:48,126 INFO L226 Difference]: Without dead ends: 85 [2018-11-28 12:25:48,127 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=830, Invalid=1426, Unknown=0, NotChecked=0, Total=2256 [2018-11-28 12:25:48,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-11-28 12:25:48,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-11-28 12:25:48,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-11-28 12:25:48,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 111 transitions. [2018-11-28 12:25:48,134 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 111 transitions. Word has length 160 [2018-11-28 12:25:48,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:25:48,134 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 111 transitions. [2018-11-28 12:25:48,134 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-11-28 12:25:48,134 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 111 transitions. [2018-11-28 12:25:48,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2018-11-28 12:25:48,135 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:25:48,135 INFO L402 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:25:48,135 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:25:48,136 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:25:48,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1249222577, now seen corresponding path program 22 times [2018-11-28 12:25:48,136 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:25:48,136 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:25:48,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:25:48,136 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:25:48,137 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:25:48,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:25:48,414 INFO L134 CoverageAnalysis]: Checked inductivity of 1705 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 968 trivial. 0 not checked. [2018-11-28 12:25:48,414 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:25:48,414 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/bin-2019/uautomizer/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:25:48,438 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 12:25:48,482 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 12:25:48,482 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:25:48,487 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:25:48,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1705 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 968 trivial. 0 not checked. [2018-11-28 12:25:48,545 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:25:48,546 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-11-28 12:25:48,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-11-28 12:25:48,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-11-28 12:25:48,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=398, Unknown=0, NotChecked=0, Total=702 [2018-11-28 12:25:48,546 INFO L87 Difference]: Start difference. First operand 85 states and 111 transitions. Second operand 27 states. [2018-11-28 12:25:48,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:25:48,899 INFO L93 Difference]: Finished difference Result 92 states and 119 transitions. [2018-11-28 12:25:48,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-11-28 12:25:48,899 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 167 [2018-11-28 12:25:48,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:25:48,900 INFO L225 Difference]: With dead ends: 92 [2018-11-28 12:25:48,900 INFO L226 Difference]: Without dead ends: 88 [2018-11-28 12:25:48,901 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=902, Invalid=1548, Unknown=0, NotChecked=0, Total=2450 [2018-11-28 12:25:48,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-11-28 12:25:48,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-11-28 12:25:48,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-11-28 12:25:48,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 115 transitions. [2018-11-28 12:25:48,909 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 115 transitions. Word has length 167 [2018-11-28 12:25:48,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:25:48,909 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 115 transitions. [2018-11-28 12:25:48,909 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-11-28 12:25:48,909 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 115 transitions. [2018-11-28 12:25:48,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-11-28 12:25:48,910 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:25:48,910 INFO L402 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:25:48,911 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:25:48,911 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:25:48,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1284144570, now seen corresponding path program 23 times [2018-11-28 12:25:48,911 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:25:48,911 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:25:48,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:25:48,912 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:25:48,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:25:48,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:25:49,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1863 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 1058 trivial. 0 not checked. [2018-11-28 12:25:49,208 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:25:49,208 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/bin-2019/uautomizer/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:25:49,220 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-28 12:25:49,297 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-11-28 12:25:49,297 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:25:49,303 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:25:49,340 INFO L134 CoverageAnalysis]: Checked inductivity of 1863 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 1058 trivial. 0 not checked. [2018-11-28 12:25:49,367 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:25:49,367 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-11-28 12:25:49,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-11-28 12:25:49,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-11-28 12:25:49,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=427, Unknown=0, NotChecked=0, Total=756 [2018-11-28 12:25:49,368 INFO L87 Difference]: Start difference. First operand 88 states and 115 transitions. Second operand 28 states. [2018-11-28 12:25:49,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:25:49,737 INFO L93 Difference]: Finished difference Result 95 states and 123 transitions. [2018-11-28 12:25:49,737 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-11-28 12:25:49,737 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 174 [2018-11-28 12:25:49,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:25:49,738 INFO L225 Difference]: With dead ends: 95 [2018-11-28 12:25:49,738 INFO L226 Difference]: Without dead ends: 91 [2018-11-28 12:25:49,738 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=977, Invalid=1675, Unknown=0, NotChecked=0, Total=2652 [2018-11-28 12:25:49,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-11-28 12:25:49,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-11-28 12:25:49,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-11-28 12:25:49,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 119 transitions. [2018-11-28 12:25:49,744 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 119 transitions. Word has length 174 [2018-11-28 12:25:49,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:25:49,744 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 119 transitions. [2018-11-28 12:25:49,745 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-11-28 12:25:49,745 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 119 transitions. [2018-11-28 12:25:49,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2018-11-28 12:25:49,746 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:25:49,746 INFO L402 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:25:49,746 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:25:49,746 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:25:49,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1205012069, now seen corresponding path program 24 times [2018-11-28 12:25:49,747 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:25:49,747 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:25:49,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:25:49,747 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:25:49,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:25:49,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:25:49,980 INFO L134 CoverageAnalysis]: Checked inductivity of 2028 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 1152 trivial. 0 not checked. [2018-11-28 12:25:49,981 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:25:49,981 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/bin-2019/uautomizer/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:25:49,987 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-28 12:25:50,036 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-11-28 12:25:50,036 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:25:50,040 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:25:50,078 INFO L134 CoverageAnalysis]: Checked inductivity of 2028 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 1152 trivial. 0 not checked. [2018-11-28 12:25:50,101 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:25:50,101 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-11-28 12:25:50,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-11-28 12:25:50,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-11-28 12:25:50,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=457, Unknown=0, NotChecked=0, Total=812 [2018-11-28 12:25:50,102 INFO L87 Difference]: Start difference. First operand 91 states and 119 transitions. Second operand 29 states. [2018-11-28 12:25:50,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:25:50,426 INFO L93 Difference]: Finished difference Result 98 states and 127 transitions. [2018-11-28 12:25:50,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-11-28 12:25:50,426 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 181 [2018-11-28 12:25:50,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:25:50,427 INFO L225 Difference]: With dead ends: 98 [2018-11-28 12:25:50,427 INFO L226 Difference]: Without dead ends: 94 [2018-11-28 12:25:50,428 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 [2018-11-28 12:25:50,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-11-28 12:25:50,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-11-28 12:25:50,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-11-28 12:25:50,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 123 transitions. [2018-11-28 12:25:50,436 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 123 transitions. Word has length 181 [2018-11-28 12:25:50,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:25:50,437 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 123 transitions. [2018-11-28 12:25:50,437 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-11-28 12:25:50,437 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 123 transitions. [2018-11-28 12:25:50,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-11-28 12:25:50,438 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:25:50,438 INFO L402 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:25:50,438 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:25:50,438 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:25:50,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1312024796, now seen corresponding path program 25 times [2018-11-28 12:25:50,439 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:25:50,439 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:25:50,439 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:25:50,439 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:25:50,439 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:25:50,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:25:50,721 INFO L134 CoverageAnalysis]: Checked inductivity of 2200 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 1250 trivial. 0 not checked. [2018-11-28 12:25:50,722 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:25:50,722 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/bin-2019/uautomizer/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:25:50,727 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:25:50,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:25:50,761 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:25:50,810 INFO L134 CoverageAnalysis]: Checked inductivity of 2200 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 1250 trivial. 0 not checked. [2018-11-28 12:25:50,825 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:25:50,825 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-11-28 12:25:50,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-11-28 12:25:50,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-11-28 12:25:50,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=488, Unknown=0, NotChecked=0, Total=870 [2018-11-28 12:25:50,826 INFO L87 Difference]: Start difference. First operand 94 states and 123 transitions. Second operand 30 states. [2018-11-28 12:25:51,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:25:51,162 INFO L93 Difference]: Finished difference Result 101 states and 131 transitions. [2018-11-28 12:25:51,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-11-28 12:25:51,163 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 188 [2018-11-28 12:25:51,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:25:51,164 INFO L225 Difference]: With dead ends: 101 [2018-11-28 12:25:51,164 INFO L226 Difference]: Without dead ends: 97 [2018-11-28 12:25:51,165 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 [2018-11-28 12:25:51,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-11-28 12:25:51,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-11-28 12:25:51,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-11-28 12:25:51,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 127 transitions. [2018-11-28 12:25:51,170 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 127 transitions. Word has length 188 [2018-11-28 12:25:51,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:25:51,170 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 127 transitions. [2018-11-28 12:25:51,171 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-11-28 12:25:51,171 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 127 transitions. [2018-11-28 12:25:51,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2018-11-28 12:25:51,172 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:25:51,172 INFO L402 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:25:51,173 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:25:51,173 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:25:51,173 INFO L82 PathProgramCache]: Analyzing trace with hash 461591931, now seen corresponding path program 26 times [2018-11-28 12:25:51,173 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:25:51,173 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:25:51,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:25:51,173 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:25:51,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:25:51,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:25:51,422 INFO L134 CoverageAnalysis]: Checked inductivity of 2379 backedges. 0 proven. 1027 refuted. 0 times theorem prover too weak. 1352 trivial. 0 not checked. [2018-11-28 12:25:51,422 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:25:51,422 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/bin-2019/uautomizer/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:25:51,428 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 12:25:51,467 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 12:25:51,467 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:25:51,471 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:25:51,514 INFO L134 CoverageAnalysis]: Checked inductivity of 2379 backedges. 0 proven. 1027 refuted. 0 times theorem prover too weak. 1352 trivial. 0 not checked. [2018-11-28 12:25:51,542 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:25:51,543 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-11-28 12:25:51,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-11-28 12:25:51,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-11-28 12:25:51,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=410, Invalid=520, Unknown=0, NotChecked=0, Total=930 [2018-11-28 12:25:51,544 INFO L87 Difference]: Start difference. First operand 97 states and 127 transitions. Second operand 31 states. [2018-11-28 12:25:51,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:25:51,973 INFO L93 Difference]: Finished difference Result 104 states and 135 transitions. [2018-11-28 12:25:51,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-11-28 12:25:51,973 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 195 [2018-11-28 12:25:51,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:25:51,975 INFO L225 Difference]: With dead ends: 104 [2018-11-28 12:25:51,975 INFO L226 Difference]: Without dead ends: 100 [2018-11-28 12:25:51,976 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 [2018-11-28 12:25:51,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-11-28 12:25:51,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-11-28 12:25:51,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-11-28 12:25:51,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 131 transitions. [2018-11-28 12:25:51,982 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 131 transitions. Word has length 195 [2018-11-28 12:25:51,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:25:51,982 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 131 transitions. [2018-11-28 12:25:51,982 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-11-28 12:25:51,982 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 131 transitions. [2018-11-28 12:25:51,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-11-28 12:25:51,984 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:25:51,984 INFO L402 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:25:51,984 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:25:51,984 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:25:51,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1460254606, now seen corresponding path program 27 times [2018-11-28 12:25:51,984 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:25:51,985 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:25:51,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:25:51,985 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:25:51,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:25:51,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:25:52,307 INFO L134 CoverageAnalysis]: Checked inductivity of 2565 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 1458 trivial. 0 not checked. [2018-11-28 12:25:52,307 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:25:52,307 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/bin-2019/uautomizer/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:25:52,316 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 12:25:52,402 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-11-28 12:25:52,402 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:25:52,406 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:25:52,433 INFO L134 CoverageAnalysis]: Checked inductivity of 2565 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 1458 trivial. 0 not checked. [2018-11-28 12:25:52,448 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:25:52,449 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-11-28 12:25:52,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-11-28 12:25:52,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-11-28 12:25:52,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=439, Invalid=553, Unknown=0, NotChecked=0, Total=992 [2018-11-28 12:25:52,450 INFO L87 Difference]: Start difference. First operand 100 states and 131 transitions. Second operand 32 states. [2018-11-28 12:25:52,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:25:52,860 INFO L93 Difference]: Finished difference Result 107 states and 139 transitions. [2018-11-28 12:25:52,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-11-28 12:25:52,860 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 202 [2018-11-28 12:25:52,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:25:52,861 INFO L225 Difference]: With dead ends: 107 [2018-11-28 12:25:52,861 INFO L226 Difference]: Without dead ends: 103 [2018-11-28 12:25:52,862 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 [2018-11-28 12:25:52,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-11-28 12:25:52,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-11-28 12:25:52,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-11-28 12:25:52,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 135 transitions. [2018-11-28 12:25:52,871 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 135 transitions. Word has length 202 [2018-11-28 12:25:52,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:25:52,871 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 135 transitions. [2018-11-28 12:25:52,871 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-11-28 12:25:52,871 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 135 transitions. [2018-11-28 12:25:52,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2018-11-28 12:25:52,873 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:25:52,873 INFO L402 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:25:52,873 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:25:52,873 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:25:52,873 INFO L82 PathProgramCache]: Analyzing trace with hash 788262289, now seen corresponding path program 28 times [2018-11-28 12:25:52,873 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:25:52,873 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:25:52,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:25:52,874 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:25:52,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:25:52,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:25:53,238 INFO L134 CoverageAnalysis]: Checked inductivity of 2758 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 1568 trivial. 0 not checked. [2018-11-28 12:25:53,238 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:25:53,238 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/bin-2019/uautomizer/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:25:53,245 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 12:25:53,298 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 12:25:53,298 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:25:53,302 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:25:53,348 INFO L134 CoverageAnalysis]: Checked inductivity of 2758 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 1568 trivial. 0 not checked. [2018-11-28 12:25:53,363 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:25:53,364 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-11-28 12:25:53,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-11-28 12:25:53,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-11-28 12:25:53,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=469, Invalid=587, Unknown=0, NotChecked=0, Total=1056 [2018-11-28 12:25:53,365 INFO L87 Difference]: Start difference. First operand 103 states and 135 transitions. Second operand 33 states. [2018-11-28 12:25:53,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:25:53,837 INFO L93 Difference]: Finished difference Result 110 states and 143 transitions. [2018-11-28 12:25:53,838 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-11-28 12:25:53,838 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 209 [2018-11-28 12:25:53,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:25:53,839 INFO L225 Difference]: With dead ends: 110 [2018-11-28 12:25:53,839 INFO L226 Difference]: Without dead ends: 106 [2018-11-28 12:25:53,840 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 [2018-11-28 12:25:53,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-11-28 12:25:53,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-11-28 12:25:53,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-11-28 12:25:53,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 139 transitions. [2018-11-28 12:25:53,847 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 139 transitions. Word has length 209 [2018-11-28 12:25:53,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:25:53,847 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 139 transitions. [2018-11-28 12:25:53,847 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-11-28 12:25:53,847 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 139 transitions. [2018-11-28 12:25:53,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2018-11-28 12:25:53,848 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:25:53,848 INFO L402 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:25:53,848 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:25:53,848 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:25:53,848 INFO L82 PathProgramCache]: Analyzing trace with hash -674054408, now seen corresponding path program 29 times [2018-11-28 12:25:53,848 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:25:53,848 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:25:53,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:25:53,849 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:25:53,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:25:53,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:25:54,167 INFO L134 CoverageAnalysis]: Checked inductivity of 2958 backedges. 0 proven. 1276 refuted. 0 times theorem prover too weak. 1682 trivial. 0 not checked. [2018-11-28 12:25:54,167 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:25:54,167 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/bin-2019/uautomizer/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:25:54,173 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-28 12:25:54,235 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-11-28 12:25:54,235 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:25:54,240 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:25:54,290 INFO L134 CoverageAnalysis]: Checked inductivity of 2958 backedges. 0 proven. 1276 refuted. 0 times theorem prover too weak. 1682 trivial. 0 not checked. [2018-11-28 12:25:54,315 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:25:54,315 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-11-28 12:25:54,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-11-28 12:25:54,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-11-28 12:25:54,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=500, Invalid=622, Unknown=0, NotChecked=0, Total=1122 [2018-11-28 12:25:54,316 INFO L87 Difference]: Start difference. First operand 106 states and 139 transitions. Second operand 34 states. [2018-11-28 12:25:54,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:25:54,746 INFO L93 Difference]: Finished difference Result 113 states and 147 transitions. [2018-11-28 12:25:54,747 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-11-28 12:25:54,747 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 216 [2018-11-28 12:25:54,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:25:54,748 INFO L225 Difference]: With dead ends: 113 [2018-11-28 12:25:54,748 INFO L226 Difference]: Without dead ends: 109 [2018-11-28 12:25:54,749 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 [2018-11-28 12:25:54,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-11-28 12:25:54,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-11-28 12:25:54,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-11-28 12:25:54,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 143 transitions. [2018-11-28 12:25:54,759 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 143 transitions. Word has length 216 [2018-11-28 12:25:54,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:25:54,759 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 143 transitions. [2018-11-28 12:25:54,759 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-11-28 12:25:54,759 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 143 transitions. [2018-11-28 12:25:54,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2018-11-28 12:25:54,761 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:25:54,761 INFO L402 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:25:54,761 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:25:54,761 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:25:54,762 INFO L82 PathProgramCache]: Analyzing trace with hash 1144876711, now seen corresponding path program 30 times [2018-11-28 12:25:54,762 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:25:54,762 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:25:54,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:25:54,763 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:25:54,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:25:54,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:25:55,219 INFO L134 CoverageAnalysis]: Checked inductivity of 3165 backedges. 0 proven. 1365 refuted. 0 times theorem prover too weak. 1800 trivial. 0 not checked. [2018-11-28 12:25:55,219 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:25:55,219 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/bin-2019/uautomizer/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:25:55,226 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-28 12:25:55,311 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-11-28 12:25:55,311 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:25:55,315 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:25:55,363 INFO L134 CoverageAnalysis]: Checked inductivity of 3165 backedges. 0 proven. 1365 refuted. 0 times theorem prover too weak. 1800 trivial. 0 not checked. [2018-11-28 12:25:55,380 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:25:55,380 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-11-28 12:25:55,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-11-28 12:25:55,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-11-28 12:25:55,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=532, Invalid=658, Unknown=0, NotChecked=0, Total=1190 [2018-11-28 12:25:55,381 INFO L87 Difference]: Start difference. First operand 109 states and 143 transitions. Second operand 35 states. [2018-11-28 12:25:55,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:25:55,977 INFO L93 Difference]: Finished difference Result 116 states and 151 transitions. [2018-11-28 12:25:55,977 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-11-28 12:25:55,977 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 223 [2018-11-28 12:25:55,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:25:55,978 INFO L225 Difference]: With dead ends: 116 [2018-11-28 12:25:55,978 INFO L226 Difference]: Without dead ends: 112 [2018-11-28 12:25:55,979 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1586, Invalid=2704, Unknown=0, NotChecked=0, Total=4290 [2018-11-28 12:25:55,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-11-28 12:25:55,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2018-11-28 12:25:55,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-11-28 12:25:55,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 147 transitions. [2018-11-28 12:25:55,989 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 147 transitions. Word has length 223 [2018-11-28 12:25:55,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:25:55,989 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 147 transitions. [2018-11-28 12:25:55,989 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-11-28 12:25:55,990 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 147 transitions. [2018-11-28 12:25:55,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2018-11-28 12:25:55,991 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:25:55,991 INFO L402 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:25:55,991 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:25:55,991 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:25:55,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1122595486, now seen corresponding path program 31 times [2018-11-28 12:25:55,992 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:25:55,992 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:25:55,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:25:55,992 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:25:55,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:25:56,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:25:56,483 INFO L134 CoverageAnalysis]: Checked inductivity of 3379 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 1922 trivial. 0 not checked. [2018-11-28 12:25:56,483 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:25:56,483 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/bin-2019/uautomizer/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:25:56,495 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:25:56,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:25:56,548 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:25:56,598 INFO L134 CoverageAnalysis]: Checked inductivity of 3379 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 1922 trivial. 0 not checked. [2018-11-28 12:25:56,622 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:25:56,622 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-11-28 12:25:56,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-11-28 12:25:56,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-11-28 12:25:56,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=565, Invalid=695, Unknown=0, NotChecked=0, Total=1260 [2018-11-28 12:25:56,623 INFO L87 Difference]: Start difference. First operand 112 states and 147 transitions. Second operand 36 states. [2018-11-28 12:25:57,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:25:57,145 INFO L93 Difference]: Finished difference Result 119 states and 155 transitions. [2018-11-28 12:25:57,145 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-11-28 12:25:57,146 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 230 [2018-11-28 12:25:57,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:25:57,147 INFO L225 Difference]: With dead ends: 119 [2018-11-28 12:25:57,147 INFO L226 Difference]: Without dead ends: 115 [2018-11-28 12:25:57,147 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1685, Invalid=2871, Unknown=0, NotChecked=0, Total=4556 [2018-11-28 12:25:57,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-11-28 12:25:57,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-11-28 12:25:57,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-11-28 12:25:57,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 151 transitions. [2018-11-28 12:25:57,154 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 151 transitions. Word has length 230 [2018-11-28 12:25:57,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:25:57,155 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 151 transitions. [2018-11-28 12:25:57,155 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-11-28 12:25:57,155 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 151 transitions. [2018-11-28 12:25:57,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2018-11-28 12:25:57,156 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:25:57,156 INFO L402 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:25:57,156 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:25:57,157 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:25:57,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1055422653, now seen corresponding path program 32 times [2018-11-28 12:25:57,157 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:25:57,157 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:25:57,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:25:57,157 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:25:57,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:25:57,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:25:57,545 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 0 proven. 1552 refuted. 0 times theorem prover too weak. 2048 trivial. 0 not checked. [2018-11-28 12:25:57,545 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:25:57,545 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/bin-2019/uautomizer/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:25:57,554 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 12:25:57,594 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 12:25:57,594 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:25:57,598 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:25:57,633 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 0 proven. 1552 refuted. 0 times theorem prover too weak. 2048 trivial. 0 not checked. [2018-11-28 12:25:57,649 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:25:57,649 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-11-28 12:25:57,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-11-28 12:25:57,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-11-28 12:25:57,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=599, Invalid=733, Unknown=0, NotChecked=0, Total=1332 [2018-11-28 12:25:57,650 INFO L87 Difference]: Start difference. First operand 115 states and 151 transitions. Second operand 37 states. [2018-11-28 12:25:58,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:25:58,190 INFO L93 Difference]: Finished difference Result 122 states and 159 transitions. [2018-11-28 12:25:58,190 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-11-28 12:25:58,190 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 237 [2018-11-28 12:25:58,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:25:58,191 INFO L225 Difference]: With dead ends: 122 [2018-11-28 12:25:58,191 INFO L226 Difference]: Without dead ends: 118 [2018-11-28 12:25:58,191 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1787, Invalid=3043, Unknown=0, NotChecked=0, Total=4830 [2018-11-28 12:25:58,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-11-28 12:25:58,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2018-11-28 12:25:58,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-11-28 12:25:58,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 155 transitions. [2018-11-28 12:25:58,201 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 155 transitions. Word has length 237 [2018-11-28 12:25:58,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:25:58,201 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 155 transitions. [2018-11-28 12:25:58,201 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-11-28 12:25:58,201 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 155 transitions. [2018-11-28 12:25:58,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2018-11-28 12:25:58,202 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:25:58,203 INFO L402 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:25:58,203 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:25:58,203 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:25:58,203 INFO L82 PathProgramCache]: Analyzing trace with hash -1624997172, now seen corresponding path program 33 times [2018-11-28 12:25:58,203 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:25:58,203 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:25:58,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:25:58,204 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:25:58,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:25:58,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:25:58,632 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 1650 refuted. 0 times theorem prover too weak. 2178 trivial. 0 not checked. [2018-11-28 12:25:58,632 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:25:58,632 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/bin-2019/uautomizer/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:25:58,638 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 12:25:58,710 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-11-28 12:25:58,710 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:25:58,713 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:25:58,748 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 1650 refuted. 0 times theorem prover too weak. 2178 trivial. 0 not checked. [2018-11-28 12:25:58,763 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:25:58,763 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-11-28 12:25:58,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-11-28 12:25:58,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-11-28 12:25:58,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=634, Invalid=772, Unknown=0, NotChecked=0, Total=1406 [2018-11-28 12:25:58,764 INFO L87 Difference]: Start difference. First operand 118 states and 155 transitions. Second operand 38 states. [2018-11-28 12:25:59,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:25:59,262 INFO L93 Difference]: Finished difference Result 125 states and 163 transitions. [2018-11-28 12:25:59,262 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-11-28 12:25:59,262 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 244 [2018-11-28 12:25:59,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:25:59,263 INFO L225 Difference]: With dead ends: 125 [2018-11-28 12:25:59,263 INFO L226 Difference]: Without dead ends: 121 [2018-11-28 12:25:59,263 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1892, Invalid=3220, Unknown=0, NotChecked=0, Total=5112 [2018-11-28 12:25:59,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-11-28 12:25:59,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-11-28 12:25:59,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-11-28 12:25:59,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 159 transitions. [2018-11-28 12:25:59,270 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 159 transitions. Word has length 244 [2018-11-28 12:25:59,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:25:59,270 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 159 transitions. [2018-11-28 12:25:59,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-11-28 12:25:59,270 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 159 transitions. [2018-11-28 12:25:59,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2018-11-28 12:25:59,272 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:25:59,272 INFO L402 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:25:59,272 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:25:59,272 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:25:59,272 INFO L82 PathProgramCache]: Analyzing trace with hash -2109887533, now seen corresponding path program 34 times [2018-11-28 12:25:59,272 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:25:59,272 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:25:59,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:25:59,273 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:25:59,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:25:59,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:25:59,807 INFO L134 CoverageAnalysis]: Checked inductivity of 4063 backedges. 0 proven. 1751 refuted. 0 times theorem prover too weak. 2312 trivial. 0 not checked. [2018-11-28 12:25:59,807 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:25:59,807 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/bin-2019/uautomizer/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:25:59,816 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 12:25:59,864 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 12:25:59,864 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:25:59,869 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:25:59,904 INFO L134 CoverageAnalysis]: Checked inductivity of 4063 backedges. 0 proven. 1751 refuted. 0 times theorem prover too weak. 2312 trivial. 0 not checked. [2018-11-28 12:25:59,919 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:25:59,919 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-11-28 12:25:59,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-11-28 12:25:59,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-11-28 12:25:59,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=670, Invalid=812, Unknown=0, NotChecked=0, Total=1482 [2018-11-28 12:25:59,920 INFO L87 Difference]: Start difference. First operand 121 states and 159 transitions. Second operand 39 states. [2018-11-28 12:26:00,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:26:00,456 INFO L93 Difference]: Finished difference Result 128 states and 167 transitions. [2018-11-28 12:26:00,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-11-28 12:26:00,456 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 251 [2018-11-28 12:26:00,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:26:00,457 INFO L225 Difference]: With dead ends: 128 [2018-11-28 12:26:00,457 INFO L226 Difference]: Without dead ends: 124 [2018-11-28 12:26:00,458 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 286 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2000, Invalid=3402, Unknown=0, NotChecked=0, Total=5402 [2018-11-28 12:26:00,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2018-11-28 12:26:00,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2018-11-28 12:26:00,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-11-28 12:26:00,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 163 transitions. [2018-11-28 12:26:00,471 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 163 transitions. Word has length 251 [2018-11-28 12:26:00,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:26:00,471 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 163 transitions. [2018-11-28 12:26:00,471 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-11-28 12:26:00,471 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 163 transitions. [2018-11-28 12:26:00,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2018-11-28 12:26:00,473 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:26:00,473 INFO L402 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:26:00,473 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:26:00,473 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:26:00,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1202454326, now seen corresponding path program 35 times [2018-11-28 12:26:00,473 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:26:00,473 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:26:00,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:26:00,474 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:26:00,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:26:00,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:26:00,929 INFO L134 CoverageAnalysis]: Checked inductivity of 4305 backedges. 0 proven. 1855 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2018-11-28 12:26:00,929 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:26:00,929 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/bin-2019/uautomizer/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:26:00,942 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-28 12:26:01,055 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-11-28 12:26:01,055 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:26:01,061 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:26:01,142 INFO L134 CoverageAnalysis]: Checked inductivity of 4305 backedges. 0 proven. 1855 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2018-11-28 12:26:01,157 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:26:01,157 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-11-28 12:26:01,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-11-28 12:26:01,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-11-28 12:26:01,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=707, Invalid=853, Unknown=0, NotChecked=0, Total=1560 [2018-11-28 12:26:01,158 INFO L87 Difference]: Start difference. First operand 124 states and 163 transitions. Second operand 40 states. [2018-11-28 12:26:01,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:26:01,656 INFO L93 Difference]: Finished difference Result 131 states and 171 transitions. [2018-11-28 12:26:01,657 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-11-28 12:26:01,657 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 258 [2018-11-28 12:26:01,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:26:01,658 INFO L225 Difference]: With dead ends: 131 [2018-11-28 12:26:01,658 INFO L226 Difference]: Without dead ends: 127 [2018-11-28 12:26:01,659 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 [2018-11-28 12:26:01,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-11-28 12:26:01,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2018-11-28 12:26:01,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-11-28 12:26:01,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 167 transitions. [2018-11-28 12:26:01,672 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 167 transitions. Word has length 258 [2018-11-28 12:26:01,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:26:01,673 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 167 transitions. [2018-11-28 12:26:01,673 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-11-28 12:26:01,673 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 167 transitions. [2018-11-28 12:26:01,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2018-11-28 12:26:01,674 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:26:01,674 INFO L402 BasicCegarLoop]: trace histogram [37, 37, 36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:26:01,675 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:26:01,675 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:26:01,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1327343593, now seen corresponding path program 36 times [2018-11-28 12:26:01,675 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:26:01,675 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:26:01,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:26:01,676 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:26:01,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:26:01,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:26:02,286 INFO L134 CoverageAnalysis]: Checked inductivity of 4554 backedges. 0 proven. 1962 refuted. 0 times theorem prover too weak. 2592 trivial. 0 not checked. [2018-11-28 12:26:02,286 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:26:02,286 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/bin-2019/uautomizer/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:26:02,294 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-28 12:26:02,395 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-11-28 12:26:02,395 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:26:02,400 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:26:02,439 INFO L134 CoverageAnalysis]: Checked inductivity of 4554 backedges. 0 proven. 1962 refuted. 0 times theorem prover too weak. 2592 trivial. 0 not checked. [2018-11-28 12:26:02,454 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:26:02,455 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-11-28 12:26:02,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-11-28 12:26:02,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-11-28 12:26:02,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=745, Invalid=895, Unknown=0, NotChecked=0, Total=1640 [2018-11-28 12:26:02,456 INFO L87 Difference]: Start difference. First operand 127 states and 167 transitions. Second operand 41 states. [2018-11-28 12:26:03,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:26:03,032 INFO L93 Difference]: Finished difference Result 134 states and 175 transitions. [2018-11-28 12:26:03,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-11-28 12:26:03,033 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 265 [2018-11-28 12:26:03,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:26:03,033 INFO L225 Difference]: With dead ends: 134 [2018-11-28 12:26:03,033 INFO L226 Difference]: Without dead ends: 130 [2018-11-28 12:26:03,034 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 302 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2225, Invalid=3781, Unknown=0, NotChecked=0, Total=6006 [2018-11-28 12:26:03,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-11-28 12:26:03,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2018-11-28 12:26:03,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-11-28 12:26:03,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 171 transitions. [2018-11-28 12:26:03,043 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 171 transitions. Word has length 265 [2018-11-28 12:26:03,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:26:03,043 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 171 transitions. [2018-11-28 12:26:03,043 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-11-28 12:26:03,043 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 171 transitions. [2018-11-28 12:26:03,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2018-11-28 12:26:03,045 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:26:03,045 INFO L402 BasicCegarLoop]: trace histogram [38, 38, 37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:26:03,045 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:26:03,045 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:26:03,045 INFO L82 PathProgramCache]: Analyzing trace with hash -742628704, now seen corresponding path program 37 times [2018-11-28 12:26:03,045 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:26:03,045 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:26:03,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:26:03,046 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:26:03,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:26:03,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:26:03,507 INFO L134 CoverageAnalysis]: Checked inductivity of 4810 backedges. 0 proven. 2072 refuted. 0 times theorem prover too weak. 2738 trivial. 0 not checked. [2018-11-28 12:26:03,507 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:26:03,507 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/bin-2019/uautomizer/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:26:03,513 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:26:03,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:26:03,556 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:26:03,621 INFO L134 CoverageAnalysis]: Checked inductivity of 4810 backedges. 0 proven. 2072 refuted. 0 times theorem prover too weak. 2738 trivial. 0 not checked. [2018-11-28 12:26:03,645 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:26:03,645 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-11-28 12:26:03,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-11-28 12:26:03,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-11-28 12:26:03,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=784, Invalid=938, Unknown=0, NotChecked=0, Total=1722 [2018-11-28 12:26:03,646 INFO L87 Difference]: Start difference. First operand 130 states and 171 transitions. Second operand 42 states. [2018-11-28 12:26:04,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:26:04,272 INFO L93 Difference]: Finished difference Result 137 states and 179 transitions. [2018-11-28 12:26:04,272 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-11-28 12:26:04,272 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 272 [2018-11-28 12:26:04,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:26:04,273 INFO L225 Difference]: With dead ends: 137 [2018-11-28 12:26:04,274 INFO L226 Difference]: Without dead ends: 133 [2018-11-28 12:26:04,274 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 310 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2342, Invalid=3978, Unknown=0, NotChecked=0, Total=6320 [2018-11-28 12:26:04,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-11-28 12:26:04,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-11-28 12:26:04,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-11-28 12:26:04,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 175 transitions. [2018-11-28 12:26:04,288 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 175 transitions. Word has length 272 [2018-11-28 12:26:04,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:26:04,288 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 175 transitions. [2018-11-28 12:26:04,288 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-11-28 12:26:04,288 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 175 transitions. [2018-11-28 12:26:04,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2018-11-28 12:26:04,289 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:26:04,289 INFO L402 BasicCegarLoop]: trace histogram [39, 39, 38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:26:04,290 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:26:04,290 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:26:04,290 INFO L82 PathProgramCache]: Analyzing trace with hash 571018495, now seen corresponding path program 38 times [2018-11-28 12:26:04,290 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:26:04,290 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:26:04,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:26:04,291 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:26:04,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:26:04,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:26:04,817 INFO L134 CoverageAnalysis]: Checked inductivity of 5073 backedges. 0 proven. 2185 refuted. 0 times theorem prover too weak. 2888 trivial. 0 not checked. [2018-11-28 12:26:04,817 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:26:04,817 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/bin-2019/uautomizer/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:26:04,823 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 12:26:04,867 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 12:26:04,867 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:26:04,871 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:26:04,911 INFO L134 CoverageAnalysis]: Checked inductivity of 5073 backedges. 0 proven. 2185 refuted. 0 times theorem prover too weak. 2888 trivial. 0 not checked. [2018-11-28 12:26:04,935 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:26:04,936 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-11-28 12:26:04,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-11-28 12:26:04,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-11-28 12:26:04,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=824, Invalid=982, Unknown=0, NotChecked=0, Total=1806 [2018-11-28 12:26:04,937 INFO L87 Difference]: Start difference. First operand 133 states and 175 transitions. Second operand 43 states. [2018-11-28 12:26:05,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:26:05,604 INFO L93 Difference]: Finished difference Result 140 states and 183 transitions. [2018-11-28 12:26:05,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-11-28 12:26:05,604 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 279 [2018-11-28 12:26:05,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:26:05,605 INFO L225 Difference]: With dead ends: 140 [2018-11-28 12:26:05,605 INFO L226 Difference]: Without dead ends: 136 [2018-11-28 12:26:05,605 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2462, Invalid=4180, Unknown=0, NotChecked=0, Total=6642 [2018-11-28 12:26:05,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2018-11-28 12:26:05,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2018-11-28 12:26:05,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-11-28 12:26:05,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 179 transitions. [2018-11-28 12:26:05,615 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 179 transitions. Word has length 279 [2018-11-28 12:26:05,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:26:05,615 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 179 transitions. [2018-11-28 12:26:05,615 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-11-28 12:26:05,616 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 179 transitions. [2018-11-28 12:26:05,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2018-11-28 12:26:05,617 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:26:05,617 INFO L402 BasicCegarLoop]: trace histogram [40, 40, 39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:26:05,617 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:26:05,617 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:26:05,618 INFO L82 PathProgramCache]: Analyzing trace with hash -708506358, now seen corresponding path program 39 times [2018-11-28 12:26:05,618 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:26:05,618 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:26:05,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:26:05,618 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:26:05,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:26:05,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:26:06,094 INFO L134 CoverageAnalysis]: Checked inductivity of 5343 backedges. 0 proven. 2301 refuted. 0 times theorem prover too weak. 3042 trivial. 0 not checked. [2018-11-28 12:26:06,094 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:26:06,094 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/bin-2019/uautomizer/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:26:06,106 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 12:26:06,200 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-11-28 12:26:06,200 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:26:06,205 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:26:06,246 INFO L134 CoverageAnalysis]: Checked inductivity of 5343 backedges. 0 proven. 2301 refuted. 0 times theorem prover too weak. 3042 trivial. 0 not checked. [2018-11-28 12:26:06,261 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:26:06,261 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-11-28 12:26:06,261 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-11-28 12:26:06,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-11-28 12:26:06,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=865, Invalid=1027, Unknown=0, NotChecked=0, Total=1892 [2018-11-28 12:26:06,262 INFO L87 Difference]: Start difference. First operand 136 states and 179 transitions. Second operand 44 states. [2018-11-28 12:26:06,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:26:06,898 INFO L93 Difference]: Finished difference Result 143 states and 187 transitions. [2018-11-28 12:26:06,898 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-11-28 12:26:06,898 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 286 [2018-11-28 12:26:06,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:26:06,899 INFO L225 Difference]: With dead ends: 143 [2018-11-28 12:26:06,899 INFO L226 Difference]: Without dead ends: 139 [2018-11-28 12:26:06,899 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 [2018-11-28 12:26:06,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-11-28 12:26:06,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2018-11-28 12:26:06,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-11-28 12:26:06,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 183 transitions. [2018-11-28 12:26:06,915 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 183 transitions. Word has length 286 [2018-11-28 12:26:06,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:26:06,916 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 183 transitions. [2018-11-28 12:26:06,916 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-11-28 12:26:06,916 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 183 transitions. [2018-11-28 12:26:06,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2018-11-28 12:26:06,917 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:26:06,917 INFO L402 BasicCegarLoop]: trace histogram [41, 41, 40, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:26:06,917 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:26:06,918 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:26:06,918 INFO L82 PathProgramCache]: Analyzing trace with hash 287341333, now seen corresponding path program 40 times [2018-11-28 12:26:06,918 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:26:06,918 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:26:06,918 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:26:06,919 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:26:06,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:26:06,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:26:07,490 INFO L134 CoverageAnalysis]: Checked inductivity of 5620 backedges. 0 proven. 2420 refuted. 0 times theorem prover too weak. 3200 trivial. 0 not checked. [2018-11-28 12:26:07,491 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:26:07,491 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/bin-2019/uautomizer/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:26:07,498 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 12:26:07,552 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 12:26:07,552 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:26:07,557 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:26:07,607 INFO L134 CoverageAnalysis]: Checked inductivity of 5620 backedges. 0 proven. 2420 refuted. 0 times theorem prover too weak. 3200 trivial. 0 not checked. [2018-11-28 12:26:07,621 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:26:07,621 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-11-28 12:26:07,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-11-28 12:26:07,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-11-28 12:26:07,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=907, Invalid=1073, Unknown=0, NotChecked=0, Total=1980 [2018-11-28 12:26:07,622 INFO L87 Difference]: Start difference. First operand 139 states and 183 transitions. Second operand 45 states. [2018-11-28 12:26:08,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:26:08,300 INFO L93 Difference]: Finished difference Result 146 states and 191 transitions. [2018-11-28 12:26:08,301 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-11-28 12:26:08,302 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 293 [2018-11-28 12:26:08,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:26:08,303 INFO L225 Difference]: With dead ends: 146 [2018-11-28 12:26:08,303 INFO L226 Difference]: Without dead ends: 142 [2018-11-28 12:26:08,303 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 [2018-11-28 12:26:08,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2018-11-28 12:26:08,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2018-11-28 12:26:08,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2018-11-28 12:26:08,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 187 transitions. [2018-11-28 12:26:08,320 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 187 transitions. Word has length 293 [2018-11-28 12:26:08,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:26:08,321 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 187 transitions. [2018-11-28 12:26:08,321 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-11-28 12:26:08,321 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 187 transitions. [2018-11-28 12:26:08,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2018-11-28 12:26:08,322 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:26:08,322 INFO L402 BasicCegarLoop]: trace histogram [42, 42, 41, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:26:08,323 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:26:08,323 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:26:08,323 INFO L82 PathProgramCache]: Analyzing trace with hash 2006277748, now seen corresponding path program 41 times [2018-11-28 12:26:08,323 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:26:08,323 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:26:08,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:26:08,324 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:26:08,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:26:08,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:26:08,864 INFO L134 CoverageAnalysis]: Checked inductivity of 5904 backedges. 0 proven. 2542 refuted. 0 times theorem prover too weak. 3362 trivial. 0 not checked. [2018-11-28 12:26:08,865 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:26:08,865 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/bin-2019/uautomizer/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:26:08,871 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-28 12:26:08,983 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-11-28 12:26:08,983 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:26:08,989 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:26:09,067 INFO L134 CoverageAnalysis]: Checked inductivity of 5904 backedges. 0 proven. 2542 refuted. 0 times theorem prover too weak. 3362 trivial. 0 not checked. [2018-11-28 12:26:09,082 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:26:09,082 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-11-28 12:26:09,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-11-28 12:26:09,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-11-28 12:26:09,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=950, Invalid=1120, Unknown=0, NotChecked=0, Total=2070 [2018-11-28 12:26:09,083 INFO L87 Difference]: Start difference. First operand 142 states and 187 transitions. Second operand 46 states. [2018-11-28 12:26:09,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:26:09,951 INFO L93 Difference]: Finished difference Result 149 states and 195 transitions. [2018-11-28 12:26:09,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-11-28 12:26:09,952 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 300 [2018-11-28 12:26:09,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:26:09,953 INFO L225 Difference]: With dead ends: 149 [2018-11-28 12:26:09,953 INFO L226 Difference]: Without dead ends: 145 [2018-11-28 12:26:09,953 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 342 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2840, Invalid=4816, Unknown=0, NotChecked=0, Total=7656 [2018-11-28 12:26:09,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-11-28 12:26:09,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2018-11-28 12:26:09,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-11-28 12:26:09,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 191 transitions. [2018-11-28 12:26:09,971 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 191 transitions. Word has length 300 [2018-11-28 12:26:09,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:26:09,972 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 191 transitions. [2018-11-28 12:26:09,972 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-11-28 12:26:09,972 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 191 transitions. [2018-11-28 12:26:09,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2018-11-28 12:26:09,973 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:26:09,973 INFO L402 BasicCegarLoop]: trace histogram [43, 43, 42, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:26:09,973 INFO L423 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:26:09,973 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:26:09,973 INFO L82 PathProgramCache]: Analyzing trace with hash 707039787, now seen corresponding path program 42 times [2018-11-28 12:26:09,973 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:26:09,973 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:26:09,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:26:09,974 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:26:09,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:26:09,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:26:10,545 INFO L134 CoverageAnalysis]: Checked inductivity of 6195 backedges. 0 proven. 2667 refuted. 0 times theorem prover too weak. 3528 trivial. 0 not checked. [2018-11-28 12:26:10,545 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:26:10,545 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/bin-2019/uautomizer/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:26:10,552 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-28 12:26:10,658 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-11-28 12:26:10,658 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:26:10,664 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:26:10,712 INFO L134 CoverageAnalysis]: Checked inductivity of 6195 backedges. 0 proven. 2667 refuted. 0 times theorem prover too weak. 3528 trivial. 0 not checked. [2018-11-28 12:26:10,727 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:26:10,728 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-11-28 12:26:10,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-11-28 12:26:10,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-11-28 12:26:10,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=994, Invalid=1168, Unknown=0, NotChecked=0, Total=2162 [2018-11-28 12:26:10,729 INFO L87 Difference]: Start difference. First operand 145 states and 191 transitions. Second operand 47 states. [2018-11-28 12:26:11,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:26:11,488 INFO L93 Difference]: Finished difference Result 152 states and 199 transitions. [2018-11-28 12:26:11,489 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-11-28 12:26:11,489 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 307 [2018-11-28 12:26:11,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:26:11,490 INFO L225 Difference]: With dead ends: 152 [2018-11-28 12:26:11,490 INFO L226 Difference]: Without dead ends: 148 [2018-11-28 12:26:11,491 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 [2018-11-28 12:26:11,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2018-11-28 12:26:11,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2018-11-28 12:26:11,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-11-28 12:26:11,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 195 transitions. [2018-11-28 12:26:11,503 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 195 transitions. Word has length 307 [2018-11-28 12:26:11,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:26:11,503 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 195 transitions. [2018-11-28 12:26:11,503 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-11-28 12:26:11,503 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 195 transitions. [2018-11-28 12:26:11,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2018-11-28 12:26:11,505 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:26:11,505 INFO L402 BasicCegarLoop]: trace histogram [44, 44, 43, 43, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:26:11,505 INFO L423 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:26:11,505 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:26:11,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1671645474, now seen corresponding path program 43 times [2018-11-28 12:26:11,505 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:26:11,505 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:26:11,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:26:11,506 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:26:11,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:26:11,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:26:12,071 INFO L134 CoverageAnalysis]: Checked inductivity of 6493 backedges. 0 proven. 2795 refuted. 0 times theorem prover too weak. 3698 trivial. 0 not checked. [2018-11-28 12:26:12,071 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:26:12,071 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/bin-2019/uautomizer/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:26:12,080 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:26:12,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:26:12,131 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:26:12,180 INFO L134 CoverageAnalysis]: Checked inductivity of 6493 backedges. 0 proven. 2795 refuted. 0 times theorem prover too weak. 3698 trivial. 0 not checked. [2018-11-28 12:26:12,196 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:26:12,196 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-11-28 12:26:12,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-11-28 12:26:12,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-11-28 12:26:12,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1039, Invalid=1217, Unknown=0, NotChecked=0, Total=2256 [2018-11-28 12:26:12,197 INFO L87 Difference]: Start difference. First operand 148 states and 195 transitions. Second operand 48 states. [2018-11-28 12:26:12,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:26:12,995 INFO L93 Difference]: Finished difference Result 155 states and 203 transitions. [2018-11-28 12:26:12,996 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-11-28 12:26:12,996 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 314 [2018-11-28 12:26:12,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:26:12,996 INFO L225 Difference]: With dead ends: 155 [2018-11-28 12:26:12,996 INFO L226 Difference]: Without dead ends: 151 [2018-11-28 12:26:12,997 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 [2018-11-28 12:26:12,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-11-28 12:26:13,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2018-11-28 12:26:13,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-11-28 12:26:13,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 199 transitions. [2018-11-28 12:26:13,013 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 199 transitions. Word has length 314 [2018-11-28 12:26:13,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:26:13,013 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 199 transitions. [2018-11-28 12:26:13,013 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-11-28 12:26:13,013 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 199 transitions. [2018-11-28 12:26:13,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2018-11-28 12:26:13,015 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:26:13,015 INFO L402 BasicCegarLoop]: trace histogram [45, 45, 44, 44, 44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:26:13,015 INFO L423 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:26:13,015 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:26:13,015 INFO L82 PathProgramCache]: Analyzing trace with hash -797576639, now seen corresponding path program 44 times [2018-11-28 12:26:13,015 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:26:13,016 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:26:13,016 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:26:13,016 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:26:13,016 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:26:13,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:26:13,597 INFO L134 CoverageAnalysis]: Checked inductivity of 6798 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 3872 trivial. 0 not checked. [2018-11-28 12:26:13,597 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:26:13,597 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/bin-2019/uautomizer/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:26:13,603 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 12:26:13,653 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 12:26:13,654 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:26:13,658 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:26:13,725 INFO L134 CoverageAnalysis]: Checked inductivity of 6798 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 3872 trivial. 0 not checked. [2018-11-28 12:26:13,739 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:26:13,739 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-11-28 12:26:13,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-11-28 12:26:13,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-11-28 12:26:13,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1085, Invalid=1267, Unknown=0, NotChecked=0, Total=2352 [2018-11-28 12:26:13,740 INFO L87 Difference]: Start difference. First operand 151 states and 199 transitions. Second operand 49 states. [2018-11-28 12:26:14,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:26:14,564 INFO L93 Difference]: Finished difference Result 158 states and 207 transitions. [2018-11-28 12:26:14,565 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-11-28 12:26:14,565 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 321 [2018-11-28 12:26:14,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:26:14,565 INFO L225 Difference]: With dead ends: 158 [2018-11-28 12:26:14,565 INFO L226 Difference]: Without dead ends: 154 [2018-11-28 12:26:14,566 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 458 GetRequests, 366 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=3245, Invalid=5497, Unknown=0, NotChecked=0, Total=8742 [2018-11-28 12:26:14,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2018-11-28 12:26:14,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2018-11-28 12:26:14,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2018-11-28 12:26:14,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 203 transitions. [2018-11-28 12:26:14,578 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 203 transitions. Word has length 321 [2018-11-28 12:26:14,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:26:14,578 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 203 transitions. [2018-11-28 12:26:14,578 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-11-28 12:26:14,578 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 203 transitions. [2018-11-28 12:26:14,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2018-11-28 12:26:14,579 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:26:14,579 INFO L402 BasicCegarLoop]: trace histogram [46, 46, 45, 45, 45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:26:14,579 INFO L423 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:26:14,579 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:26:14,579 INFO L82 PathProgramCache]: Analyzing trace with hash 44725832, now seen corresponding path program 45 times [2018-11-28 12:26:14,579 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:26:14,579 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:26:14,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:26:14,580 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:26:14,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:26:14,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:26:15,188 INFO L134 CoverageAnalysis]: Checked inductivity of 7110 backedges. 0 proven. 3060 refuted. 0 times theorem prover too weak. 4050 trivial. 0 not checked. [2018-11-28 12:26:15,188 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:26:15,188 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/bin-2019/uautomizer/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:26:15,195 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 12:26:15,312 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2018-11-28 12:26:15,312 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:26:15,317 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:26:15,410 INFO L134 CoverageAnalysis]: Checked inductivity of 7110 backedges. 0 proven. 3060 refuted. 0 times theorem prover too weak. 4050 trivial. 0 not checked. [2018-11-28 12:26:15,435 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:26:15,436 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-11-28 12:26:15,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-11-28 12:26:15,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-11-28 12:26:15,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1132, Invalid=1318, Unknown=0, NotChecked=0, Total=2450 [2018-11-28 12:26:15,437 INFO L87 Difference]: Start difference. First operand 154 states and 203 transitions. Second operand 50 states. [2018-11-28 12:26:16,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:26:16,267 INFO L93 Difference]: Finished difference Result 161 states and 211 transitions. [2018-11-28 12:26:16,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-11-28 12:26:16,268 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 328 [2018-11-28 12:26:16,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:26:16,269 INFO L225 Difference]: With dead ends: 161 [2018-11-28 12:26:16,269 INFO L226 Difference]: Without dead ends: 157 [2018-11-28 12:26:16,269 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 [2018-11-28 12:26:16,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-11-28 12:26:16,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2018-11-28 12:26:16,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-11-28 12:26:16,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 207 transitions. [2018-11-28 12:26:16,291 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 207 transitions. Word has length 328 [2018-11-28 12:26:16,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:26:16,292 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 207 transitions. [2018-11-28 12:26:16,292 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-11-28 12:26:16,292 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 207 transitions. [2018-11-28 12:26:16,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2018-11-28 12:26:16,293 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:26:16,294 INFO L402 BasicCegarLoop]: trace histogram [47, 47, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:26:16,294 INFO L423 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:26:16,294 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:26:16,294 INFO L82 PathProgramCache]: Analyzing trace with hash 454376279, now seen corresponding path program 46 times [2018-11-28 12:26:16,294 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:26:16,294 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:26:16,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:26:16,295 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:26:16,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:26:16,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:26:16,918 INFO L134 CoverageAnalysis]: Checked inductivity of 7429 backedges. 0 proven. 3197 refuted. 0 times theorem prover too weak. 4232 trivial. 0 not checked. [2018-11-28 12:26:16,918 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:26:16,918 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/bin-2019/uautomizer/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:26:16,931 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 12:26:16,984 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 12:26:16,984 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:26:16,989 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:26:17,060 INFO L134 CoverageAnalysis]: Checked inductivity of 7429 backedges. 0 proven. 3197 refuted. 0 times theorem prover too weak. 4232 trivial. 0 not checked. [2018-11-28 12:26:17,075 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:26:17,075 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-11-28 12:26:17,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-11-28 12:26:17,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-11-28 12:26:17,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1180, Invalid=1370, Unknown=0, NotChecked=0, Total=2550 [2018-11-28 12:26:17,076 INFO L87 Difference]: Start difference. First operand 157 states and 207 transitions. Second operand 51 states. [2018-11-28 12:26:17,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:26:17,943 INFO L93 Difference]: Finished difference Result 164 states and 215 transitions. [2018-11-28 12:26:17,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-11-28 12:26:17,943 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 335 [2018-11-28 12:26:17,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:26:17,944 INFO L225 Difference]: With dead ends: 164 [2018-11-28 12:26:17,944 INFO L226 Difference]: Without dead ends: 160 [2018-11-28 12:26:17,945 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 478 GetRequests, 382 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=3530, Invalid=5976, Unknown=0, NotChecked=0, Total=9506 [2018-11-28 12:26:17,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2018-11-28 12:26:17,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2018-11-28 12:26:17,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-11-28 12:26:17,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 211 transitions. [2018-11-28 12:26:17,962 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 211 transitions. Word has length 335 [2018-11-28 12:26:17,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:26:17,962 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 211 transitions. [2018-11-28 12:26:17,962 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-11-28 12:26:17,962 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 211 transitions. [2018-11-28 12:26:17,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2018-11-28 12:26:17,964 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:26:17,964 INFO L402 BasicCegarLoop]: trace histogram [48, 48, 47, 47, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:26:17,964 INFO L423 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:26:17,964 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:26:17,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1718484146, now seen corresponding path program 47 times [2018-11-28 12:26:17,964 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:26:17,964 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:26:17,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:26:17,965 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:26:17,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:26:17,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:26:18,599 INFO L134 CoverageAnalysis]: Checked inductivity of 7755 backedges. 0 proven. 3337 refuted. 0 times theorem prover too weak. 4418 trivial. 0 not checked. [2018-11-28 12:26:18,599 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:26:18,599 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/bin-2019/uautomizer/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:26:18,605 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-28 12:26:18,740 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2018-11-28 12:26:18,740 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:26:18,748 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:26:18,832 INFO L134 CoverageAnalysis]: Checked inductivity of 7755 backedges. 0 proven. 3337 refuted. 0 times theorem prover too weak. 4418 trivial. 0 not checked. [2018-11-28 12:26:18,847 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:26:18,847 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-11-28 12:26:18,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-11-28 12:26:18,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-11-28 12:26:18,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1229, Invalid=1423, Unknown=0, NotChecked=0, Total=2652 [2018-11-28 12:26:18,848 INFO L87 Difference]: Start difference. First operand 160 states and 211 transitions. Second operand 52 states. [2018-11-28 12:26:19,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:26:19,717 INFO L93 Difference]: Finished difference Result 167 states and 219 transitions. [2018-11-28 12:26:19,717 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-11-28 12:26:19,717 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 342 [2018-11-28 12:26:19,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:26:19,718 INFO L225 Difference]: With dead ends: 167 [2018-11-28 12:26:19,719 INFO L226 Difference]: Without dead ends: 163 [2018-11-28 12:26:19,719 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 [2018-11-28 12:26:19,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-11-28 12:26:19,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2018-11-28 12:26:19,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-11-28 12:26:19,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 215 transitions. [2018-11-28 12:26:19,745 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 215 transitions. Word has length 342 [2018-11-28 12:26:19,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:26:19,745 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 215 transitions. [2018-11-28 12:26:19,745 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-11-28 12:26:19,745 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 215 transitions. [2018-11-28 12:26:19,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2018-11-28 12:26:19,747 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:26:19,747 INFO L402 BasicCegarLoop]: trace histogram [49, 49, 48, 48, 48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:26:19,747 INFO L423 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:26:19,747 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:26:19,747 INFO L82 PathProgramCache]: Analyzing trace with hash 849546605, now seen corresponding path program 48 times [2018-11-28 12:26:19,747 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:26:19,748 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:26:19,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:26:19,748 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:26:19,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:26:19,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:26:20,422 INFO L134 CoverageAnalysis]: Checked inductivity of 8088 backedges. 0 proven. 3480 refuted. 0 times theorem prover too weak. 4608 trivial. 0 not checked. [2018-11-28 12:26:20,422 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:26:20,422 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/bin-2019/uautomizer/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:26:20,428 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-28 12:26:20,557 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-11-28 12:26:20,557 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:26:20,563 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:26:20,629 INFO L134 CoverageAnalysis]: Checked inductivity of 8088 backedges. 0 proven. 3480 refuted. 0 times theorem prover too weak. 4608 trivial. 0 not checked. [2018-11-28 12:26:20,645 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:26:20,645 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-11-28 12:26:20,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-11-28 12:26:20,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-11-28 12:26:20,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1279, Invalid=1477, Unknown=0, NotChecked=0, Total=2756 [2018-11-28 12:26:20,646 INFO L87 Difference]: Start difference. First operand 163 states and 215 transitions. Second operand 53 states. [2018-11-28 12:26:21,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:26:21,571 INFO L93 Difference]: Finished difference Result 170 states and 223 transitions. [2018-11-28 12:26:21,572 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-11-28 12:26:21,572 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 349 [2018-11-28 12:26:21,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:26:21,572 INFO L225 Difference]: With dead ends: 170 [2018-11-28 12:26:21,572 INFO L226 Difference]: Without dead ends: 166 [2018-11-28 12:26:21,573 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 [2018-11-28 12:26:21,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2018-11-28 12:26:21,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2018-11-28 12:26:21,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2018-11-28 12:26:21,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 219 transitions. [2018-11-28 12:26:21,597 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 219 transitions. Word has length 349 [2018-11-28 12:26:21,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:26:21,598 INFO L480 AbstractCegarLoop]: Abstraction has 166 states and 219 transitions. [2018-11-28 12:26:21,598 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-11-28 12:26:21,598 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 219 transitions. [2018-11-28 12:26:21,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2018-11-28 12:26:21,599 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:26:21,600 INFO L402 BasicCegarLoop]: trace histogram [50, 50, 49, 49, 49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:26:21,600 INFO L423 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:26:21,600 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:26:21,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1560892900, now seen corresponding path program 49 times [2018-11-28 12:26:21,600 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:26:21,600 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:26:21,601 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:26:21,601 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:26:21,601 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:26:21,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:26:22,303 INFO L134 CoverageAnalysis]: Checked inductivity of 8428 backedges. 0 proven. 3626 refuted. 0 times theorem prover too weak. 4802 trivial. 0 not checked. [2018-11-28 12:26:22,304 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:26:22,304 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/bin-2019/uautomizer/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:26:22,312 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:26:22,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:26:22,369 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:26:22,446 INFO L134 CoverageAnalysis]: Checked inductivity of 8428 backedges. 0 proven. 3626 refuted. 0 times theorem prover too weak. 4802 trivial. 0 not checked. [2018-11-28 12:26:22,460 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:26:22,460 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-11-28 12:26:22,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-11-28 12:26:22,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-11-28 12:26:22,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1330, Invalid=1532, Unknown=0, NotChecked=0, Total=2862 [2018-11-28 12:26:22,461 INFO L87 Difference]: Start difference. First operand 166 states and 219 transitions. Second operand 54 states. [2018-11-28 12:26:23,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:26:23,349 INFO L93 Difference]: Finished difference Result 173 states and 227 transitions. [2018-11-28 12:26:23,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-11-28 12:26:23,349 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 356 [2018-11-28 12:26:23,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:26:23,350 INFO L225 Difference]: With dead ends: 173 [2018-11-28 12:26:23,350 INFO L226 Difference]: Without dead ends: 169 [2018-11-28 12:26:23,350 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 [2018-11-28 12:26:23,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-11-28 12:26:23,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2018-11-28 12:26:23,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-11-28 12:26:23,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 223 transitions. [2018-11-28 12:26:23,366 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 223 transitions. Word has length 356 [2018-11-28 12:26:23,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:26:23,366 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 223 transitions. [2018-11-28 12:26:23,366 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-11-28 12:26:23,366 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 223 transitions. [2018-11-28 12:26:23,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2018-11-28 12:26:23,368 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:26:23,368 INFO L402 BasicCegarLoop]: trace histogram [51, 51, 50, 50, 50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:26:23,368 INFO L423 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:26:23,368 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:26:23,368 INFO L82 PathProgramCache]: Analyzing trace with hash -1352660861, now seen corresponding path program 50 times [2018-11-28 12:26:23,369 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:26:23,369 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:26:23,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:26:23,369 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:26:23,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:26:23,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:26:24,077 INFO L134 CoverageAnalysis]: Checked inductivity of 8775 backedges. 0 proven. 3775 refuted. 0 times theorem prover too weak. 5000 trivial. 0 not checked. [2018-11-28 12:26:24,077 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:26:24,077 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/bin-2019/uautomizer/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:26:24,084 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 12:26:24,139 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 12:26:24,139 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:26:24,143 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:26:24,213 INFO L134 CoverageAnalysis]: Checked inductivity of 8775 backedges. 0 proven. 3775 refuted. 0 times theorem prover too weak. 5000 trivial. 0 not checked. [2018-11-28 12:26:24,227 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:26:24,228 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-11-28 12:26:24,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-11-28 12:26:24,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-11-28 12:26:24,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1382, Invalid=1588, Unknown=0, NotChecked=0, Total=2970 [2018-11-28 12:26:24,229 INFO L87 Difference]: Start difference. First operand 169 states and 223 transitions. Second operand 55 states. [2018-11-28 12:26:25,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:26:25,231 INFO L93 Difference]: Finished difference Result 176 states and 231 transitions. [2018-11-28 12:26:25,231 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-11-28 12:26:25,232 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 363 [2018-11-28 12:26:25,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:26:25,233 INFO L225 Difference]: With dead ends: 176 [2018-11-28 12:26:25,233 INFO L226 Difference]: Without dead ends: 172 [2018-11-28 12:26:25,233 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 518 GetRequests, 414 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1325 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=4136, Invalid=6994, Unknown=0, NotChecked=0, Total=11130 [2018-11-28 12:26:25,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2018-11-28 12:26:25,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2018-11-28 12:26:25,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2018-11-28 12:26:25,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 227 transitions. [2018-11-28 12:26:25,249 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 227 transitions. Word has length 363 [2018-11-28 12:26:25,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:26:25,250 INFO L480 AbstractCegarLoop]: Abstraction has 172 states and 227 transitions. [2018-11-28 12:26:25,250 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-11-28 12:26:25,250 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 227 transitions. [2018-11-28 12:26:25,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2018-11-28 12:26:25,251 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:26:25,251 INFO L402 BasicCegarLoop]: trace histogram [52, 52, 51, 51, 51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:26:25,252 INFO L423 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:26:25,252 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:26:25,252 INFO L82 PathProgramCache]: Analyzing trace with hash -722215290, now seen corresponding path program 51 times [2018-11-28 12:26:25,252 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:26:25,252 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:26:25,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:26:25,253 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:26:25,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:26:25,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:26:25,992 INFO L134 CoverageAnalysis]: Checked inductivity of 9129 backedges. 0 proven. 3927 refuted. 0 times theorem prover too weak. 5202 trivial. 0 not checked. [2018-11-28 12:26:25,992 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:26:25,992 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/bin-2019/uautomizer/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:26:25,998 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 12:26:26,151 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2018-11-28 12:26:26,151 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:26:26,157 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:26:26,241 INFO L134 CoverageAnalysis]: Checked inductivity of 9129 backedges. 0 proven. 3927 refuted. 0 times theorem prover too weak. 5202 trivial. 0 not checked. [2018-11-28 12:26:26,258 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:26:26,258 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-11-28 12:26:26,258 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-11-28 12:26:26,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-11-28 12:26:26,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1435, Invalid=1645, Unknown=0, NotChecked=0, Total=3080 [2018-11-28 12:26:26,259 INFO L87 Difference]: Start difference. First operand 172 states and 227 transitions. Second operand 56 states. [2018-11-28 12:26:27,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:26:27,305 INFO L93 Difference]: Finished difference Result 179 states and 235 transitions. [2018-11-28 12:26:27,305 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-11-28 12:26:27,305 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 370 [2018-11-28 12:26:27,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:26:27,306 INFO L225 Difference]: With dead ends: 179 [2018-11-28 12:26:27,306 INFO L226 Difference]: Without dead ends: 175 [2018-11-28 12:26:27,307 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 528 GetRequests, 422 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=4295, Invalid=7261, Unknown=0, NotChecked=0, Total=11556 [2018-11-28 12:26:27,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-11-28 12:26:27,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2018-11-28 12:26:27,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-11-28 12:26:27,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 231 transitions. [2018-11-28 12:26:27,324 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 231 transitions. Word has length 370 [2018-11-28 12:26:27,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:26:27,325 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 231 transitions. [2018-11-28 12:26:27,325 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-11-28 12:26:27,325 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 231 transitions. [2018-11-28 12:26:27,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2018-11-28 12:26:27,326 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:26:27,326 INFO L402 BasicCegarLoop]: trace histogram [53, 53, 52, 52, 52, 52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:26:27,326 INFO L423 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:26:27,326 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:26:27,326 INFO L82 PathProgramCache]: Analyzing trace with hash -148058983, now seen corresponding path program 52 times [2018-11-28 12:26:27,326 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:26:27,326 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:26:27,327 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:26:27,327 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:26:27,327 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:26:27,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:26:28,083 INFO L134 CoverageAnalysis]: Checked inductivity of 9490 backedges. 0 proven. 4082 refuted. 0 times theorem prover too weak. 5408 trivial. 0 not checked. [2018-11-28 12:26:28,083 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:26:28,083 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/bin-2019/uautomizer/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:26:28,090 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 12:26:28,152 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 12:26:28,152 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:26:28,158 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:26:28,282 INFO L134 CoverageAnalysis]: Checked inductivity of 9490 backedges. 0 proven. 4082 refuted. 0 times theorem prover too weak. 5408 trivial. 0 not checked. [2018-11-28 12:26:28,298 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:26:28,298 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-11-28 12:26:28,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-11-28 12:26:28,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-11-28 12:26:28,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1489, Invalid=1703, Unknown=0, NotChecked=0, Total=3192 [2018-11-28 12:26:28,300 INFO L87 Difference]: Start difference. First operand 175 states and 231 transitions. Second operand 57 states. [2018-11-28 12:26:29,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:26:29,401 INFO L93 Difference]: Finished difference Result 182 states and 239 transitions. [2018-11-28 12:26:29,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-11-28 12:26:29,401 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 377 [2018-11-28 12:26:29,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:26:29,402 INFO L225 Difference]: With dead ends: 182 [2018-11-28 12:26:29,402 INFO L226 Difference]: Without dead ends: 178 [2018-11-28 12:26:29,403 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 538 GetRequests, 430 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1430 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=4457, Invalid=7533, Unknown=0, NotChecked=0, Total=11990 [2018-11-28 12:26:29,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2018-11-28 12:26:29,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2018-11-28 12:26:29,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2018-11-28 12:26:29,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 235 transitions. [2018-11-28 12:26:29,421 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 235 transitions. Word has length 377 [2018-11-28 12:26:29,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:26:29,421 INFO L480 AbstractCegarLoop]: Abstraction has 178 states and 235 transitions. [2018-11-28 12:26:29,421 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-11-28 12:26:29,421 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 235 transitions. [2018-11-28 12:26:29,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 385 [2018-11-28 12:26:29,422 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:26:29,422 INFO L402 BasicCegarLoop]: trace histogram [54, 54, 53, 53, 53, 53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:26:29,422 INFO L423 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:26:29,423 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:26:29,423 INFO L82 PathProgramCache]: Analyzing trace with hash 2088040944, now seen corresponding path program 53 times [2018-11-28 12:26:29,423 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:26:29,423 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:26:29,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:26:29,423 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:26:29,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:26:29,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:26:30,219 INFO L134 CoverageAnalysis]: Checked inductivity of 9858 backedges. 0 proven. 4240 refuted. 0 times theorem prover too weak. 5618 trivial. 0 not checked. [2018-11-28 12:26:30,220 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:26:30,220 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/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 [2018-11-28 12:26:30,226 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-28 12:26:30,395 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2018-11-28 12:26:30,395 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:26:30,404 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:26:30,488 INFO L134 CoverageAnalysis]: Checked inductivity of 9858 backedges. 0 proven. 4240 refuted. 0 times theorem prover too weak. 5618 trivial. 0 not checked. [2018-11-28 12:26:30,503 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:26:30,504 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-11-28 12:26:30,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-11-28 12:26:30,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-11-28 12:26:30,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1544, Invalid=1762, Unknown=0, NotChecked=0, Total=3306 [2018-11-28 12:26:30,504 INFO L87 Difference]: Start difference. First operand 178 states and 235 transitions. Second operand 58 states. [2018-11-28 12:26:31,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:26:31,615 INFO L93 Difference]: Finished difference Result 185 states and 243 transitions. [2018-11-28 12:26:31,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-11-28 12:26:31,616 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 384 [2018-11-28 12:26:31,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:26:31,617 INFO L225 Difference]: With dead ends: 185 [2018-11-28 12:26:31,617 INFO L226 Difference]: Without dead ends: 181 [2018-11-28 12:26:31,618 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 [2018-11-28 12:26:31,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-11-28 12:26:31,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2018-11-28 12:26:31,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-11-28 12:26:31,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 239 transitions. [2018-11-28 12:26:31,638 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 239 transitions. Word has length 384 [2018-11-28 12:26:31,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:26:31,638 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 239 transitions. [2018-11-28 12:26:31,638 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-11-28 12:26:31,638 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 239 transitions. [2018-11-28 12:26:31,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 392 [2018-11-28 12:26:31,640 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:26:31,640 INFO L402 BasicCegarLoop]: trace histogram [55, 55, 54, 54, 54, 54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:26:31,640 INFO L423 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:26:31,640 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:26:31,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1685456465, now seen corresponding path program 54 times [2018-11-28 12:26:31,640 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:26:31,641 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:26:31,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:26:31,641 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:26:31,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:26:31,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:26:32,436 INFO L134 CoverageAnalysis]: Checked inductivity of 10233 backedges. 0 proven. 4401 refuted. 0 times theorem prover too weak. 5832 trivial. 0 not checked. [2018-11-28 12:26:32,436 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:26:32,437 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/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 [2018-11-28 12:26:32,442 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-28 12:26:32,587 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-11-28 12:26:32,587 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:26:32,593 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:26:32,684 INFO L134 CoverageAnalysis]: Checked inductivity of 10233 backedges. 0 proven. 4401 refuted. 0 times theorem prover too weak. 5832 trivial. 0 not checked. [2018-11-28 12:26:32,701 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:26:32,701 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-11-28 12:26:32,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-11-28 12:26:32,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-11-28 12:26:32,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1600, Invalid=1822, Unknown=0, NotChecked=0, Total=3422 [2018-11-28 12:26:32,702 INFO L87 Difference]: Start difference. First operand 181 states and 239 transitions. Second operand 59 states. [2018-11-28 12:26:33,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:26:33,836 INFO L93 Difference]: Finished difference Result 188 states and 247 transitions. [2018-11-28 12:26:33,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-11-28 12:26:33,837 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 391 [2018-11-28 12:26:33,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:26:33,837 INFO L225 Difference]: With dead ends: 188 [2018-11-28 12:26:33,837 INFO L226 Difference]: Without dead ends: 184 [2018-11-28 12:26:33,838 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 558 GetRequests, 446 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=4790, Invalid=8092, Unknown=0, NotChecked=0, Total=12882 [2018-11-28 12:26:33,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2018-11-28 12:26:33,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2018-11-28 12:26:33,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2018-11-28 12:26:33,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 243 transitions. [2018-11-28 12:26:33,867 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 243 transitions. Word has length 391 [2018-11-28 12:26:33,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:26:33,868 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 243 transitions. [2018-11-28 12:26:33,868 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-11-28 12:26:33,868 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 243 transitions. [2018-11-28 12:26:33,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 399 [2018-11-28 12:26:33,870 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:26:33,870 INFO L402 BasicCegarLoop]: trace histogram [56, 56, 55, 55, 55, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:26:33,870 INFO L423 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:26:33,870 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:26:33,870 INFO L82 PathProgramCache]: Analyzing trace with hash -1628873638, now seen corresponding path program 55 times [2018-11-28 12:26:33,870 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:26:33,871 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:26:33,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:26:33,871 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:26:33,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:26:33,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:26:34,720 INFO L134 CoverageAnalysis]: Checked inductivity of 10615 backedges. 0 proven. 4565 refuted. 0 times theorem prover too weak. 6050 trivial. 0 not checked. [2018-11-28 12:26:34,720 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:26:34,720 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/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 [2018-11-28 12:26:34,728 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:26:34,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:26:34,791 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:26:34,914 INFO L134 CoverageAnalysis]: Checked inductivity of 10615 backedges. 0 proven. 4565 refuted. 0 times theorem prover too weak. 6050 trivial. 0 not checked. [2018-11-28 12:26:34,929 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:26:34,929 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-11-28 12:26:34,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-11-28 12:26:34,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-11-28 12:26:34,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1657, Invalid=1883, Unknown=0, NotChecked=0, Total=3540 [2018-11-28 12:26:34,930 INFO L87 Difference]: Start difference. First operand 184 states and 243 transitions. Second operand 60 states. [2018-11-28 12:26:36,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:26:36,098 INFO L93 Difference]: Finished difference Result 191 states and 251 transitions. [2018-11-28 12:26:36,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-11-28 12:26:36,098 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 398 [2018-11-28 12:26:36,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:26:36,099 INFO L225 Difference]: With dead ends: 191 [2018-11-28 12:26:36,099 INFO L226 Difference]: Without dead ends: 187 [2018-11-28 12:26:36,100 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 568 GetRequests, 454 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1595 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=4961, Invalid=8379, Unknown=0, NotChecked=0, Total=13340 [2018-11-28 12:26:36,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-11-28 12:26:36,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2018-11-28 12:26:36,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-11-28 12:26:36,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 247 transitions. [2018-11-28 12:26:36,122 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 247 transitions. Word has length 398 [2018-11-28 12:26:36,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:26:36,122 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 247 transitions. [2018-11-28 12:26:36,122 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-11-28 12:26:36,122 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 247 transitions. [2018-11-28 12:26:36,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 406 [2018-11-28 12:26:36,124 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:26:36,124 INFO L402 BasicCegarLoop]: trace histogram [57, 57, 56, 56, 56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:26:36,124 INFO L423 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:26:36,124 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:26:36,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1214763067, now seen corresponding path program 56 times [2018-11-28 12:26:36,125 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:26:36,125 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:26:36,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:26:36,125 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:26:36,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:26:36,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:26:37,051 INFO L134 CoverageAnalysis]: Checked inductivity of 11004 backedges. 0 proven. 4732 refuted. 0 times theorem prover too weak. 6272 trivial. 0 not checked. [2018-11-28 12:26:37,051 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:26:37,051 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/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 [2018-11-28 12:26:37,059 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 12:26:37,130 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 12:26:37,130 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:26:37,135 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:26:37,209 INFO L134 CoverageAnalysis]: Checked inductivity of 11004 backedges. 0 proven. 4732 refuted. 0 times theorem prover too weak. 6272 trivial. 0 not checked. [2018-11-28 12:26:37,224 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:26:37,224 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-11-28 12:26:37,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-11-28 12:26:37,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-11-28 12:26:37,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1715, Invalid=1945, Unknown=0, NotChecked=0, Total=3660 [2018-11-28 12:26:37,225 INFO L87 Difference]: Start difference. First operand 187 states and 247 transitions. Second operand 61 states. [2018-11-28 12:26:38,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:26:38,423 INFO L93 Difference]: Finished difference Result 194 states and 255 transitions. [2018-11-28 12:26:38,423 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-11-28 12:26:38,423 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 405 [2018-11-28 12:26:38,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:26:38,424 INFO L225 Difference]: With dead ends: 194 [2018-11-28 12:26:38,424 INFO L226 Difference]: Without dead ends: 190 [2018-11-28 12:26:38,425 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 [2018-11-28 12:26:38,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2018-11-28 12:26:38,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 190. [2018-11-28 12:26:38,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2018-11-28 12:26:38,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 251 transitions. [2018-11-28 12:26:38,447 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 251 transitions. Word has length 405 [2018-11-28 12:26:38,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:26:38,447 INFO L480 AbstractCegarLoop]: Abstraction has 190 states and 251 transitions. [2018-11-28 12:26:38,447 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-11-28 12:26:38,447 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 251 transitions. [2018-11-28 12:26:38,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 413 [2018-11-28 12:26:38,449 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:26:38,449 INFO L402 BasicCegarLoop]: trace histogram [58, 58, 57, 57, 57, 57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:26:38,449 INFO L423 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:26:38,450 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:26:38,450 INFO L82 PathProgramCache]: Analyzing trace with hash -383752764, now seen corresponding path program 57 times [2018-11-28 12:26:38,450 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:26:38,450 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:26:38,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:26:38,450 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:26:38,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:26:38,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:26:39,398 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 0 proven. 4902 refuted. 0 times theorem prover too weak. 6498 trivial. 0 not checked. [2018-11-28 12:26:39,398 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:26:39,398 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/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 [2018-11-28 12:26:39,406 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 12:26:39,574 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2018-11-28 12:26:39,574 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:26:39,581 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:26:39,658 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 0 proven. 4902 refuted. 0 times theorem prover too weak. 6498 trivial. 0 not checked. [2018-11-28 12:26:39,673 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:26:39,673 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-11-28 12:26:39,674 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-11-28 12:26:39,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-11-28 12:26:39,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1774, Invalid=2008, Unknown=0, NotChecked=0, Total=3782 [2018-11-28 12:26:39,674 INFO L87 Difference]: Start difference. First operand 190 states and 251 transitions. Second operand 62 states. [2018-11-28 12:26:40,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:26:40,909 INFO L93 Difference]: Finished difference Result 197 states and 259 transitions. [2018-11-28 12:26:40,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-11-28 12:26:40,909 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 412 [2018-11-28 12:26:40,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:26:40,910 INFO L225 Difference]: With dead ends: 197 [2018-11-28 12:26:40,910 INFO L226 Difference]: Without dead ends: 193 [2018-11-28 12:26:40,911 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 [2018-11-28 12:26:40,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2018-11-28 12:26:40,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2018-11-28 12:26:40,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2018-11-28 12:26:40,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 255 transitions. [2018-11-28 12:26:40,936 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 255 transitions. Word has length 412 [2018-11-28 12:26:40,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:26:40,936 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 255 transitions. [2018-11-28 12:26:40,936 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-11-28 12:26:40,936 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 255 transitions. [2018-11-28 12:26:40,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2018-11-28 12:26:40,937 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:26:40,937 INFO L402 BasicCegarLoop]: trace histogram [59, 59, 58, 58, 58, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:26:40,937 INFO L423 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:26:40,937 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:26:40,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1310199515, now seen corresponding path program 58 times [2018-11-28 12:26:40,938 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:26:40,938 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:26:40,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:26:40,938 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:26:40,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:26:40,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:26:41,868 INFO L134 CoverageAnalysis]: Checked inductivity of 11803 backedges. 0 proven. 5075 refuted. 0 times theorem prover too weak. 6728 trivial. 0 not checked. [2018-11-28 12:26:41,868 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:26:41,868 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/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 [2018-11-28 12:26:41,873 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 12:26:41,944 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 12:26:41,944 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:26:41,951 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:26:42,032 INFO L134 CoverageAnalysis]: Checked inductivity of 11803 backedges. 0 proven. 5075 refuted. 0 times theorem prover too weak. 6728 trivial. 0 not checked. [2018-11-28 12:26:42,056 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:26:42,056 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-11-28 12:26:42,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-11-28 12:26:42,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-11-28 12:26:42,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1834, Invalid=2072, Unknown=0, NotChecked=0, Total=3906 [2018-11-28 12:26:42,057 INFO L87 Difference]: Start difference. First operand 193 states and 255 transitions. Second operand 63 states. [2018-11-28 12:26:43,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:26:43,401 INFO L93 Difference]: Finished difference Result 200 states and 263 transitions. [2018-11-28 12:26:43,402 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-11-28 12:26:43,402 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 419 [2018-11-28 12:26:43,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:26:43,402 INFO L225 Difference]: With dead ends: 200 [2018-11-28 12:26:43,403 INFO L226 Difference]: Without dead ends: 196 [2018-11-28 12:26:43,403 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 [2018-11-28 12:26:43,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2018-11-28 12:26:43,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2018-11-28 12:26:43,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2018-11-28 12:26:43,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 259 transitions. [2018-11-28 12:26:43,430 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 259 transitions. Word has length 419 [2018-11-28 12:26:43,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:26:43,430 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 259 transitions. [2018-11-28 12:26:43,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-11-28 12:26:43,431 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 259 transitions. [2018-11-28 12:26:43,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 427 [2018-11-28 12:26:43,432 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:26:43,432 INFO L402 BasicCegarLoop]: trace histogram [60, 60, 59, 59, 59, 59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:26:43,432 INFO L423 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:26:43,432 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:26:43,432 INFO L82 PathProgramCache]: Analyzing trace with hash -783714770, now seen corresponding path program 59 times [2018-11-28 12:26:43,432 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:26:43,432 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:26:43,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:26:43,433 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:26:43,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:26:43,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:26:44,384 INFO L134 CoverageAnalysis]: Checked inductivity of 12213 backedges. 0 proven. 5251 refuted. 0 times theorem prover too weak. 6962 trivial. 0 not checked. [2018-11-28 12:26:44,384 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:26:44,384 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/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 [2018-11-28 12:26:44,391 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-28 12:26:44,588 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2018-11-28 12:26:44,588 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:26:44,598 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:26:44,679 INFO L134 CoverageAnalysis]: Checked inductivity of 12213 backedges. 0 proven. 5251 refuted. 0 times theorem prover too weak. 6962 trivial. 0 not checked. [2018-11-28 12:26:44,694 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:26:44,694 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-11-28 12:26:44,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-11-28 12:26:44,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-11-28 12:26:44,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1895, Invalid=2137, Unknown=0, NotChecked=0, Total=4032 [2018-11-28 12:26:44,696 INFO L87 Difference]: Start difference. First operand 196 states and 259 transitions. Second operand 64 states. [2018-11-28 12:26:46,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:26:46,041 INFO L93 Difference]: Finished difference Result 203 states and 267 transitions. [2018-11-28 12:26:46,041 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-11-28 12:26:46,041 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 426 [2018-11-28 12:26:46,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:26:46,042 INFO L225 Difference]: With dead ends: 203 [2018-11-28 12:26:46,042 INFO L226 Difference]: Without dead ends: 199 [2018-11-28 12:26:46,043 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 608 GetRequests, 486 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1829 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=5675, Invalid=9577, Unknown=0, NotChecked=0, Total=15252 [2018-11-28 12:26:46,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2018-11-28 12:26:46,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2018-11-28 12:26:46,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-11-28 12:26:46,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 263 transitions. [2018-11-28 12:26:46,067 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 263 transitions. Word has length 426 [2018-11-28 12:26:46,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:26:46,067 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 263 transitions. [2018-11-28 12:26:46,067 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-11-28 12:26:46,067 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 263 transitions. [2018-11-28 12:26:46,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2018-11-28 12:26:46,069 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:26:46,069 INFO L402 BasicCegarLoop]: trace histogram [61, 61, 60, 60, 60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:26:46,069 INFO L423 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:26:46,069 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:26:46,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1486211343, now seen corresponding path program 60 times [2018-11-28 12:26:46,069 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:26:46,069 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:26:46,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:26:46,070 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:26:46,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:26:46,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:26:47,092 INFO L134 CoverageAnalysis]: Checked inductivity of 12630 backedges. 0 proven. 5430 refuted. 0 times theorem prover too weak. 7200 trivial. 0 not checked. [2018-11-28 12:26:47,092 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:26:47,092 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/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 [2018-11-28 12:26:47,098 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-28 12:26:47,269 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2018-11-28 12:26:47,270 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:26:47,277 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:26:47,364 INFO L134 CoverageAnalysis]: Checked inductivity of 12630 backedges. 0 proven. 5430 refuted. 0 times theorem prover too weak. 7200 trivial. 0 not checked. [2018-11-28 12:26:47,379 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:26:47,380 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-11-28 12:26:47,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-11-28 12:26:47,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-11-28 12:26:47,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1957, Invalid=2203, Unknown=0, NotChecked=0, Total=4160 [2018-11-28 12:26:47,380 INFO L87 Difference]: Start difference. First operand 199 states and 263 transitions. Second operand 65 states. [2018-11-28 12:26:48,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:26:48,777 INFO L93 Difference]: Finished difference Result 206 states and 271 transitions. [2018-11-28 12:26:48,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-11-28 12:26:48,777 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 433 [2018-11-28 12:26:48,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:26:48,778 INFO L225 Difference]: With dead ends: 206 [2018-11-28 12:26:48,778 INFO L226 Difference]: Without dead ends: 202 [2018-11-28 12:26:48,779 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 [2018-11-28 12:26:48,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2018-11-28 12:26:48,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2018-11-28 12:26:48,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2018-11-28 12:26:48,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 267 transitions. [2018-11-28 12:26:48,804 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 267 transitions. Word has length 433 [2018-11-28 12:26:48,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:26:48,805 INFO L480 AbstractCegarLoop]: Abstraction has 202 states and 267 transitions. [2018-11-28 12:26:48,805 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-11-28 12:26:48,805 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 267 transitions. [2018-11-28 12:26:48,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 441 [2018-11-28 12:26:48,807 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:26:48,807 INFO L402 BasicCegarLoop]: trace histogram [62, 62, 61, 61, 61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:26:48,807 INFO L423 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:26:48,807 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:26:48,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1191973480, now seen corresponding path program 61 times [2018-11-28 12:26:48,807 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:26:48,808 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:26:48,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:26:48,808 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:26:48,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:26:48,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:26:49,842 INFO L134 CoverageAnalysis]: Checked inductivity of 13054 backedges. 0 proven. 5612 refuted. 0 times theorem prover too weak. 7442 trivial. 0 not checked. [2018-11-28 12:26:49,842 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:26:49,842 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/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 [2018-11-28 12:26:49,849 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:26:49,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:26:49,922 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:26:50,008 INFO L134 CoverageAnalysis]: Checked inductivity of 13054 backedges. 0 proven. 5612 refuted. 0 times theorem prover too weak. 7442 trivial. 0 not checked. [2018-11-28 12:26:50,023 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:26:50,023 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-11-28 12:26:50,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-11-28 12:26:50,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-11-28 12:26:50,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2020, Invalid=2270, Unknown=0, NotChecked=0, Total=4290 [2018-11-28 12:26:50,024 INFO L87 Difference]: Start difference. First operand 202 states and 267 transitions. Second operand 66 states. [2018-11-28 12:26:51,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:26:51,459 INFO L93 Difference]: Finished difference Result 209 states and 275 transitions. [2018-11-28 12:26:51,459 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-11-28 12:26:51,459 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 440 [2018-11-28 12:26:51,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:26:51,460 INFO L225 Difference]: With dead ends: 209 [2018-11-28 12:26:51,460 INFO L226 Difference]: Without dead ends: 205 [2018-11-28 12:26:51,461 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 628 GetRequests, 502 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1952 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=6050, Invalid=10206, Unknown=0, NotChecked=0, Total=16256 [2018-11-28 12:26:51,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2018-11-28 12:26:51,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2018-11-28 12:26:51,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2018-11-28 12:26:51,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 271 transitions. [2018-11-28 12:26:51,487 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 271 transitions. Word has length 440 [2018-11-28 12:26:51,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:26:51,487 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 271 transitions. [2018-11-28 12:26:51,488 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-11-28 12:26:51,488 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 271 transitions. [2018-11-28 12:26:51,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 448 [2018-11-28 12:26:51,489 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:26:51,489 INFO L402 BasicCegarLoop]: trace histogram [63, 63, 62, 62, 62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:26:51,489 INFO L423 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:26:51,489 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:26:51,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1349564409, now seen corresponding path program 62 times [2018-11-28 12:26:51,489 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:26:51,489 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:26:51,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:26:51,490 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:26:51,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:26:51,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:26:52,542 INFO L134 CoverageAnalysis]: Checked inductivity of 13485 backedges. 0 proven. 5797 refuted. 0 times theorem prover too weak. 7688 trivial. 0 not checked. [2018-11-28 12:26:52,542 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:26:52,542 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/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 [2018-11-28 12:26:52,549 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 12:26:52,618 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 12:26:52,618 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:26:52,624 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:26:52,712 INFO L134 CoverageAnalysis]: Checked inductivity of 13485 backedges. 0 proven. 5797 refuted. 0 times theorem prover too weak. 7688 trivial. 0 not checked. [2018-11-28 12:26:52,726 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:26:52,727 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-11-28 12:26:52,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-11-28 12:26:52,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-11-28 12:26:52,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2084, Invalid=2338, Unknown=0, NotChecked=0, Total=4422 [2018-11-28 12:26:52,727 INFO L87 Difference]: Start difference. First operand 205 states and 271 transitions. Second operand 67 states. [2018-11-28 12:26:54,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:26:54,202 INFO L93 Difference]: Finished difference Result 212 states and 279 transitions. [2018-11-28 12:26:54,202 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-11-28 12:26:54,203 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 447 [2018-11-28 12:26:54,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:26:54,204 INFO L225 Difference]: With dead ends: 212 [2018-11-28 12:26:54,204 INFO L226 Difference]: Without dead ends: 208 [2018-11-28 12:26:54,205 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 [2018-11-28 12:26:54,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2018-11-28 12:26:54,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 208. [2018-11-28 12:26:54,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2018-11-28 12:26:54,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 275 transitions. [2018-11-28 12:26:54,233 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 275 transitions. Word has length 447 [2018-11-28 12:26:54,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:26:54,234 INFO L480 AbstractCegarLoop]: Abstraction has 208 states and 275 transitions. [2018-11-28 12:26:54,234 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-11-28 12:26:54,234 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 275 transitions. [2018-11-28 12:26:54,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 455 [2018-11-28 12:26:54,236 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:26:54,236 INFO L402 BasicCegarLoop]: trace histogram [64, 64, 63, 63, 63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:26:54,236 INFO L423 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:26:54,236 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:26:54,236 INFO L82 PathProgramCache]: Analyzing trace with hash 252652546, now seen corresponding path program 63 times [2018-11-28 12:26:54,236 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:26:54,236 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:26:54,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:26:54,237 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:26:54,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:26:54,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:26:55,326 INFO L134 CoverageAnalysis]: Checked inductivity of 13923 backedges. 0 proven. 5985 refuted. 0 times theorem prover too weak. 7938 trivial. 0 not checked. [2018-11-28 12:26:55,326 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:26:55,326 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/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 [2018-11-28 12:26:55,334 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 12:26:55,557 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2018-11-28 12:26:55,557 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:26:55,565 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:26:55,656 INFO L134 CoverageAnalysis]: Checked inductivity of 13923 backedges. 0 proven. 5985 refuted. 0 times theorem prover too weak. 7938 trivial. 0 not checked. [2018-11-28 12:26:55,671 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:26:55,671 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-11-28 12:26:55,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-11-28 12:26:55,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-11-28 12:26:55,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2149, Invalid=2407, Unknown=0, NotChecked=0, Total=4556 [2018-11-28 12:26:55,672 INFO L87 Difference]: Start difference. First operand 208 states and 275 transitions. Second operand 68 states. [2018-11-28 12:26:57,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:26:57,253 INFO L93 Difference]: Finished difference Result 215 states and 283 transitions. [2018-11-28 12:26:57,253 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-11-28 12:26:57,253 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 454 [2018-11-28 12:26:57,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:26:57,254 INFO L225 Difference]: With dead ends: 215 [2018-11-28 12:26:57,254 INFO L226 Difference]: Without dead ends: 211 [2018-11-28 12:26:57,263 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 648 GetRequests, 518 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2079 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=6437, Invalid=10855, Unknown=0, NotChecked=0, Total=17292 [2018-11-28 12:26:57,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2018-11-28 12:26:57,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2018-11-28 12:26:57,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2018-11-28 12:26:57,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 279 transitions. [2018-11-28 12:26:57,290 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 279 transitions. Word has length 454 [2018-11-28 12:26:57,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:26:57,290 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 279 transitions. [2018-11-28 12:26:57,290 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-11-28 12:26:57,290 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 279 transitions. [2018-11-28 12:26:57,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 462 [2018-11-28 12:26:57,291 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:26:57,292 INFO L402 BasicCegarLoop]: trace histogram [65, 65, 64, 64, 64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:26:57,292 INFO L423 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:26:57,292 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:26:57,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1411899933, now seen corresponding path program 64 times [2018-11-28 12:26:57,292 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:26:57,292 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:26:57,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:26:57,293 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:26:57,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:26:57,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:26:58,399 INFO L134 CoverageAnalysis]: Checked inductivity of 14368 backedges. 0 proven. 6176 refuted. 0 times theorem prover too weak. 8192 trivial. 0 not checked. [2018-11-28 12:26:58,399 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:26:58,399 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/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 [2018-11-28 12:26:58,406 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 12:26:58,482 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 12:26:58,482 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:26:58,490 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:26:58,593 INFO L134 CoverageAnalysis]: Checked inductivity of 14368 backedges. 0 proven. 6176 refuted. 0 times theorem prover too weak. 8192 trivial. 0 not checked. [2018-11-28 12:26:58,608 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:26:58,608 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-11-28 12:26:58,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-11-28 12:26:58,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-11-28 12:26:58,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2215, Invalid=2477, Unknown=0, NotChecked=0, Total=4692 [2018-11-28 12:26:58,609 INFO L87 Difference]: Start difference. First operand 211 states and 279 transitions. Second operand 69 states. [2018-11-28 12:27:00,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:27:00,249 INFO L93 Difference]: Finished difference Result 218 states and 287 transitions. [2018-11-28 12:27:00,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-11-28 12:27:00,250 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 461 [2018-11-28 12:27:00,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:27:00,250 INFO L225 Difference]: With dead ends: 218 [2018-11-28 12:27:00,250 INFO L226 Difference]: Without dead ends: 214 [2018-11-28 12:27:00,251 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 [2018-11-28 12:27:00,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2018-11-28 12:27:00,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2018-11-28 12:27:00,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2018-11-28 12:27:00,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 283 transitions. [2018-11-28 12:27:00,282 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 283 transitions. Word has length 461 [2018-11-28 12:27:00,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:27:00,282 INFO L480 AbstractCegarLoop]: Abstraction has 214 states and 283 transitions. [2018-11-28 12:27:00,282 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-11-28 12:27:00,282 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 283 transitions. [2018-11-28 12:27:00,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 469 [2018-11-28 12:27:00,290 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:27:00,291 INFO L402 BasicCegarLoop]: trace histogram [66, 66, 65, 65, 65, 65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:27:00,291 INFO L423 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:27:00,291 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:27:00,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1911198060, now seen corresponding path program 65 times [2018-11-28 12:27:00,291 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:27:00,291 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:27:00,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:27:00,292 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:27:00,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:27:00,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:27:01,435 INFO L134 CoverageAnalysis]: Checked inductivity of 14820 backedges. 0 proven. 6370 refuted. 0 times theorem prover too weak. 8450 trivial. 0 not checked. [2018-11-28 12:27:01,435 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:27:01,435 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/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 [2018-11-28 12:27:01,443 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-28 12:27:01,692 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2018-11-28 12:27:01,692 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:27:01,703 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:27:01,800 INFO L134 CoverageAnalysis]: Checked inductivity of 14820 backedges. 0 proven. 6370 refuted. 0 times theorem prover too weak. 8450 trivial. 0 not checked. [2018-11-28 12:27:01,815 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:27:01,815 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-11-28 12:27:01,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-11-28 12:27:01,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-11-28 12:27:01,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2282, Invalid=2548, Unknown=0, NotChecked=0, Total=4830 [2018-11-28 12:27:01,816 INFO L87 Difference]: Start difference. First operand 214 states and 283 transitions. Second operand 70 states. [2018-11-28 12:27:03,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:27:03,430 INFO L93 Difference]: Finished difference Result 221 states and 291 transitions. [2018-11-28 12:27:03,430 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-11-28 12:27:03,430 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 468 [2018-11-28 12:27:03,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:27:03,431 INFO L225 Difference]: With dead ends: 221 [2018-11-28 12:27:03,431 INFO L226 Difference]: Without dead ends: 217 [2018-11-28 12:27:03,432 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 [2018-11-28 12:27:03,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2018-11-28 12:27:03,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 217. [2018-11-28 12:27:03,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2018-11-28 12:27:03,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 287 transitions. [2018-11-28 12:27:03,464 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 287 transitions. Word has length 468 [2018-11-28 12:27:03,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:27:03,465 INFO L480 AbstractCegarLoop]: Abstraction has 217 states and 287 transitions. [2018-11-28 12:27:03,465 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-11-28 12:27:03,465 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 287 transitions. [2018-11-28 12:27:03,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2018-11-28 12:27:03,467 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:27:03,467 INFO L402 BasicCegarLoop]: trace histogram [67, 67, 66, 66, 66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:27:03,467 INFO L423 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:27:03,467 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:27:03,468 INFO L82 PathProgramCache]: Analyzing trace with hash -495672013, now seen corresponding path program 66 times [2018-11-28 12:27:03,468 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:27:03,468 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:27:03,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:27:03,468 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:27:03,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:27:03,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:27:04,684 INFO L134 CoverageAnalysis]: Checked inductivity of 15279 backedges. 0 proven. 6567 refuted. 0 times theorem prover too weak. 8712 trivial. 0 not checked. [2018-11-28 12:27:04,684 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:27:04,684 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/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 [2018-11-28 12:27:04,691 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-28 12:27:04,896 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2018-11-28 12:27:04,897 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:27:04,905 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:27:05,005 INFO L134 CoverageAnalysis]: Checked inductivity of 15279 backedges. 0 proven. 6567 refuted. 0 times theorem prover too weak. 8712 trivial. 0 not checked. [2018-11-28 12:27:05,020 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:27:05,020 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-11-28 12:27:05,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-11-28 12:27:05,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-11-28 12:27:05,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2350, Invalid=2620, Unknown=0, NotChecked=0, Total=4970 [2018-11-28 12:27:05,021 INFO L87 Difference]: Start difference. First operand 217 states and 287 transitions. Second operand 71 states. [2018-11-28 12:27:06,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:27:06,640 INFO L93 Difference]: Finished difference Result 224 states and 295 transitions. [2018-11-28 12:27:06,640 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-11-28 12:27:06,640 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 475 [2018-11-28 12:27:06,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:27:06,641 INFO L225 Difference]: With dead ends: 224 [2018-11-28 12:27:06,641 INFO L226 Difference]: Without dead ends: 220 [2018-11-28 12:27:06,642 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 678 GetRequests, 542 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2277 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=7040, Invalid=11866, Unknown=0, NotChecked=0, Total=18906 [2018-11-28 12:27:06,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2018-11-28 12:27:06,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 220. [2018-11-28 12:27:06,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2018-11-28 12:27:06,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 291 transitions. [2018-11-28 12:27:06,675 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 291 transitions. Word has length 475 [2018-11-28 12:27:06,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:27:06,675 INFO L480 AbstractCegarLoop]: Abstraction has 220 states and 291 transitions. [2018-11-28 12:27:06,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-11-28 12:27:06,675 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 291 transitions. [2018-11-28 12:27:06,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2018-11-28 12:27:06,677 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:27:06,677 INFO L402 BasicCegarLoop]: trace histogram [68, 68, 67, 67, 67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:27:06,677 INFO L423 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:27:06,677 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:27:06,677 INFO L82 PathProgramCache]: Analyzing trace with hash -785023530, now seen corresponding path program 67 times [2018-11-28 12:27:06,677 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:27:06,677 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:27:06,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:27:06,678 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:27:06,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:27:06,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:27:07,913 INFO L134 CoverageAnalysis]: Checked inductivity of 15745 backedges. 0 proven. 6767 refuted. 0 times theorem prover too weak. 8978 trivial. 0 not checked. [2018-11-28 12:27:07,913 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:27:07,913 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/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 [2018-11-28 12:27:07,920 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:27:07,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:27:08,002 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:27:08,109 INFO L134 CoverageAnalysis]: Checked inductivity of 15745 backedges. 0 proven. 6767 refuted. 0 times theorem prover too weak. 8978 trivial. 0 not checked. [2018-11-28 12:27:08,124 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:27:08,124 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-11-28 12:27:08,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-11-28 12:27:08,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-11-28 12:27:08,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2419, Invalid=2693, Unknown=0, NotChecked=0, Total=5112 [2018-11-28 12:27:08,125 INFO L87 Difference]: Start difference. First operand 220 states and 291 transitions. Second operand 72 states. [2018-11-28 12:27:09,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:27:09,895 INFO L93 Difference]: Finished difference Result 227 states and 299 transitions. [2018-11-28 12:27:09,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-11-28 12:27:09,895 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 482 [2018-11-28 12:27:09,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:27:09,896 INFO L225 Difference]: With dead ends: 227 [2018-11-28 12:27:09,896 INFO L226 Difference]: Without dead ends: 223 [2018-11-28 12:27:09,898 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 [2018-11-28 12:27:09,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2018-11-28 12:27:09,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2018-11-28 12:27:09,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2018-11-28 12:27:09,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 295 transitions. [2018-11-28 12:27:09,934 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 295 transitions. Word has length 482 [2018-11-28 12:27:09,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:27:09,934 INFO L480 AbstractCegarLoop]: Abstraction has 223 states and 295 transitions. [2018-11-28 12:27:09,935 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-11-28 12:27:09,935 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 295 transitions. [2018-11-28 12:27:09,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2018-11-28 12:27:09,937 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:27:09,937 INFO L402 BasicCegarLoop]: trace histogram [69, 69, 68, 68, 68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:27:09,937 INFO L423 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:27:09,937 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:27:09,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1700147529, now seen corresponding path program 68 times [2018-11-28 12:27:09,938 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:27:09,938 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:27:09,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:27:09,938 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:27:09,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:27:09,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:27:11,197 INFO L134 CoverageAnalysis]: Checked inductivity of 16218 backedges. 0 proven. 6970 refuted. 0 times theorem prover too weak. 9248 trivial. 0 not checked. [2018-11-28 12:27:11,197 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:27:11,197 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/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 [2018-11-28 12:27:11,205 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 12:27:11,283 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 12:27:11,283 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:27:11,289 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:27:11,410 INFO L134 CoverageAnalysis]: Checked inductivity of 16218 backedges. 0 proven. 6970 refuted. 0 times theorem prover too weak. 9248 trivial. 0 not checked. [2018-11-28 12:27:11,425 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:27:11,426 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-11-28 12:27:11,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-11-28 12:27:11,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-11-28 12:27:11,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2489, Invalid=2767, Unknown=0, NotChecked=0, Total=5256 [2018-11-28 12:27:11,426 INFO L87 Difference]: Start difference. First operand 223 states and 295 transitions. Second operand 73 states. [2018-11-28 12:27:13,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:27:13,178 INFO L93 Difference]: Finished difference Result 230 states and 303 transitions. [2018-11-28 12:27:13,179 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-11-28 12:27:13,179 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 489 [2018-11-28 12:27:13,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:27:13,180 INFO L225 Difference]: With dead ends: 230 [2018-11-28 12:27:13,180 INFO L226 Difference]: Without dead ends: 226 [2018-11-28 12:27:13,181 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 698 GetRequests, 558 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2414 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=7457, Invalid=12565, Unknown=0, NotChecked=0, Total=20022 [2018-11-28 12:27:13,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2018-11-28 12:27:13,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 226. [2018-11-28 12:27:13,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2018-11-28 12:27:13,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 299 transitions. [2018-11-28 12:27:13,218 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 299 transitions. Word has length 489 [2018-11-28 12:27:13,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:27:13,218 INFO L480 AbstractCegarLoop]: Abstraction has 226 states and 299 transitions. [2018-11-28 12:27:13,219 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-11-28 12:27:13,219 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 299 transitions. [2018-11-28 12:27:13,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2018-11-28 12:27:13,220 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:27:13,220 INFO L402 BasicCegarLoop]: trace histogram [70, 70, 69, 69, 69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:27:13,220 INFO L423 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:27:13,220 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:27:13,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1879092928, now seen corresponding path program 69 times [2018-11-28 12:27:13,221 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:27:13,221 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:27:13,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:27:13,221 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:27:13,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:27:13,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:27:14,510 INFO L134 CoverageAnalysis]: Checked inductivity of 16698 backedges. 0 proven. 7176 refuted. 0 times theorem prover too weak. 9522 trivial. 0 not checked. [2018-11-28 12:27:14,510 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:27:14,510 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/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 [2018-11-28 12:27:14,518 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 12:27:14,767 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2018-11-28 12:27:14,767 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:27:14,776 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:27:14,897 INFO L134 CoverageAnalysis]: Checked inductivity of 16698 backedges. 0 proven. 7176 refuted. 0 times theorem prover too weak. 9522 trivial. 0 not checked. [2018-11-28 12:27:14,912 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:27:14,912 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-11-28 12:27:14,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-11-28 12:27:14,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-11-28 12:27:14,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2560, Invalid=2842, Unknown=0, NotChecked=0, Total=5402 [2018-11-28 12:27:14,913 INFO L87 Difference]: Start difference. First operand 226 states and 299 transitions. Second operand 74 states. [2018-11-28 12:27:16,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:27:16,699 INFO L93 Difference]: Finished difference Result 233 states and 307 transitions. [2018-11-28 12:27:16,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-11-28 12:27:16,699 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 496 [2018-11-28 12:27:16,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:27:16,700 INFO L225 Difference]: With dead ends: 233 [2018-11-28 12:27:16,700 INFO L226 Difference]: Without dead ends: 229 [2018-11-28 12:27:16,702 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 708 GetRequests, 566 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2484 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=7670, Invalid=12922, Unknown=0, NotChecked=0, Total=20592 [2018-11-28 12:27:16,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2018-11-28 12:27:16,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 229. [2018-11-28 12:27:16,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2018-11-28 12:27:16,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 303 transitions. [2018-11-28 12:27:16,739 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 303 transitions. Word has length 496 [2018-11-28 12:27:16,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:27:16,740 INFO L480 AbstractCegarLoop]: Abstraction has 229 states and 303 transitions. [2018-11-28 12:27:16,740 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-11-28 12:27:16,740 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 303 transitions. [2018-11-28 12:27:16,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 504 [2018-11-28 12:27:16,743 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:27:16,743 INFO L402 BasicCegarLoop]: trace histogram [71, 71, 70, 70, 70, 70, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:27:16,743 INFO L423 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:27:16,743 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:27:16,743 INFO L82 PathProgramCache]: Analyzing trace with hash 55387743, now seen corresponding path program 70 times [2018-11-28 12:27:16,743 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:27:16,743 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:27:16,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:27:16,744 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:27:16,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:27:16,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:27:18,100 INFO L134 CoverageAnalysis]: Checked inductivity of 17185 backedges. 0 proven. 7385 refuted. 0 times theorem prover too weak. 9800 trivial. 0 not checked. [2018-11-28 12:27:18,100 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:27:18,100 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/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 [2018-11-28 12:27:18,106 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 12:27:18,186 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 12:27:18,186 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:27:18,195 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:27:18,304 INFO L134 CoverageAnalysis]: Checked inductivity of 17185 backedges. 0 proven. 7385 refuted. 0 times theorem prover too weak. 9800 trivial. 0 not checked. [2018-11-28 12:27:18,319 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:27:18,319 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-11-28 12:27:18,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-11-28 12:27:18,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-11-28 12:27:18,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2632, Invalid=2918, Unknown=0, NotChecked=0, Total=5550 [2018-11-28 12:27:18,320 INFO L87 Difference]: Start difference. First operand 229 states and 303 transitions. Second operand 75 states. [2018-11-28 12:27:20,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:27:20,113 INFO L93 Difference]: Finished difference Result 236 states and 311 transitions. [2018-11-28 12:27:20,113 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-11-28 12:27:20,113 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 503 [2018-11-28 12:27:20,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:27:20,115 INFO L225 Difference]: With dead ends: 236 [2018-11-28 12:27:20,115 INFO L226 Difference]: Without dead ends: 232 [2018-11-28 12:27:20,116 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 718 GetRequests, 574 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2555 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=7886, Invalid=13284, Unknown=0, NotChecked=0, Total=21170 [2018-11-28 12:27:20,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2018-11-28 12:27:20,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 232. [2018-11-28 12:27:20,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2018-11-28 12:27:20,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 307 transitions. [2018-11-28 12:27:20,157 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 307 transitions. Word has length 503 [2018-11-28 12:27:20,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:27:20,158 INFO L480 AbstractCegarLoop]: Abstraction has 232 states and 307 transitions. [2018-11-28 12:27:20,158 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-11-28 12:27:20,158 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 307 transitions. [2018-11-28 12:27:20,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 511 [2018-11-28 12:27:20,160 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:27:20,161 INFO L402 BasicCegarLoop]: trace histogram [72, 72, 71, 71, 71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:27:20,161 INFO L423 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:27:20,161 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:27:20,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1497928790, now seen corresponding path program 71 times [2018-11-28 12:27:20,161 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:27:20,161 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:27:20,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:27:20,162 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:27:20,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:27:20,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:27:21,529 INFO L134 CoverageAnalysis]: Checked inductivity of 17679 backedges. 0 proven. 7597 refuted. 0 times theorem prover too weak. 10082 trivial. 0 not checked. [2018-11-28 12:27:21,529 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:27:21,529 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/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 [2018-11-28 12:27:21,536 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-28 12:27:21,833 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2018-11-28 12:27:21,833 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:27:21,847 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:27:21,962 INFO L134 CoverageAnalysis]: Checked inductivity of 17679 backedges. 0 proven. 7597 refuted. 0 times theorem prover too weak. 10082 trivial. 0 not checked. [2018-11-28 12:27:21,978 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:27:21,978 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-11-28 12:27:21,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-11-28 12:27:21,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-11-28 12:27:21,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2705, Invalid=2995, Unknown=0, NotChecked=0, Total=5700 [2018-11-28 12:27:21,979 INFO L87 Difference]: Start difference. First operand 232 states and 307 transitions. Second operand 76 states. [2018-11-28 12:27:23,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:27:23,939 INFO L93 Difference]: Finished difference Result 239 states and 315 transitions. [2018-11-28 12:27:23,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-11-28 12:27:23,939 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 510 [2018-11-28 12:27:23,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:27:23,940 INFO L225 Difference]: With dead ends: 239 [2018-11-28 12:27:23,940 INFO L226 Difference]: Without dead ends: 235 [2018-11-28 12:27:23,941 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 728 GetRequests, 582 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2627 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=8105, Invalid=13651, Unknown=0, NotChecked=0, Total=21756 [2018-11-28 12:27:23,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2018-11-28 12:27:23,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235. [2018-11-28 12:27:23,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2018-11-28 12:27:23,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 311 transitions. [2018-11-28 12:27:23,982 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 311 transitions. Word has length 510 [2018-11-28 12:27:23,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:27:23,982 INFO L480 AbstractCegarLoop]: Abstraction has 235 states and 311 transitions. [2018-11-28 12:27:23,983 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-11-28 12:27:23,983 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 311 transitions. [2018-11-28 12:27:23,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 518 [2018-11-28 12:27:23,984 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:27:23,984 INFO L402 BasicCegarLoop]: trace histogram [73, 73, 72, 72, 72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:27:23,984 INFO L423 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:27:23,984 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:27:23,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1551508597, now seen corresponding path program 72 times [2018-11-28 12:27:23,985 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:27:23,985 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:27:23,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:27:23,985 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:27:23,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:27:24,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:27:25,380 INFO L134 CoverageAnalysis]: Checked inductivity of 18180 backedges. 0 proven. 7812 refuted. 0 times theorem prover too weak. 10368 trivial. 0 not checked. [2018-11-28 12:27:25,380 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:27:25,380 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/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 [2018-11-28 12:27:25,387 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-28 12:27:25,652 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2018-11-28 12:27:25,653 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:27:25,661 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:27:25,789 INFO L134 CoverageAnalysis]: Checked inductivity of 18180 backedges. 0 proven. 7812 refuted. 0 times theorem prover too weak. 10368 trivial. 0 not checked. [2018-11-28 12:27:25,805 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:27:25,805 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-11-28 12:27:25,805 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-11-28 12:27:25,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-11-28 12:27:25,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2779, Invalid=3073, Unknown=0, NotChecked=0, Total=5852 [2018-11-28 12:27:25,806 INFO L87 Difference]: Start difference. First operand 235 states and 311 transitions. Second operand 77 states. [2018-11-28 12:27:27,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:27:27,869 INFO L93 Difference]: Finished difference Result 242 states and 319 transitions. [2018-11-28 12:27:27,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-11-28 12:27:27,869 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 517 [2018-11-28 12:27:27,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:27:27,871 INFO L225 Difference]: With dead ends: 242 [2018-11-28 12:27:27,871 INFO L226 Difference]: Without dead ends: 238 [2018-11-28 12:27:27,873 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 738 GetRequests, 590 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2700 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=8327, Invalid=14023, Unknown=0, NotChecked=0, Total=22350 [2018-11-28 12:27:27,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2018-11-28 12:27:27,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 238. [2018-11-28 12:27:27,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2018-11-28 12:27:27,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 315 transitions. [2018-11-28 12:27:27,919 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 315 transitions. Word has length 517 [2018-11-28 12:27:27,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:27:27,919 INFO L480 AbstractCegarLoop]: Abstraction has 238 states and 315 transitions. [2018-11-28 12:27:27,920 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-11-28 12:27:27,920 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 315 transitions. [2018-11-28 12:27:27,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 525 [2018-11-28 12:27:27,922 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:27:27,922 INFO L402 BasicCegarLoop]: trace histogram [74, 74, 73, 73, 73, 73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:27:27,922 INFO L423 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:27:27,923 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:27:27,923 INFO L82 PathProgramCache]: Analyzing trace with hash -986895084, now seen corresponding path program 73 times [2018-11-28 12:27:27,923 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:27:27,923 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:27:27,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:27:27,923 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:27:27,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:27:27,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:27:29,344 INFO L134 CoverageAnalysis]: Checked inductivity of 18688 backedges. 0 proven. 8030 refuted. 0 times theorem prover too weak. 10658 trivial. 0 not checked. [2018-11-28 12:27:29,344 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:27:29,344 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/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 [2018-11-28 12:27:29,351 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:27:29,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:27:29,439 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:27:29,616 INFO L134 CoverageAnalysis]: Checked inductivity of 18688 backedges. 0 proven. 8030 refuted. 0 times theorem prover too weak. 10658 trivial. 0 not checked. [2018-11-28 12:27:29,631 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:27:29,631 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-11-28 12:27:29,632 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-11-28 12:27:29,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-11-28 12:27:29,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2854, Invalid=3152, Unknown=0, NotChecked=0, Total=6006 [2018-11-28 12:27:29,633 INFO L87 Difference]: Start difference. First operand 238 states and 315 transitions. Second operand 78 states. [2018-11-28 12:27:31,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:27:31,682 INFO L93 Difference]: Finished difference Result 245 states and 323 transitions. [2018-11-28 12:27:31,683 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-11-28 12:27:31,683 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 524 [2018-11-28 12:27:31,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:27:31,684 INFO L225 Difference]: With dead ends: 245 [2018-11-28 12:27:31,684 INFO L226 Difference]: Without dead ends: 241 [2018-11-28 12:27:31,685 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 748 GetRequests, 598 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2774 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=8552, Invalid=14400, Unknown=0, NotChecked=0, Total=22952 [2018-11-28 12:27:31,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2018-11-28 12:27:31,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 241. [2018-11-28 12:27:31,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2018-11-28 12:27:31,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 319 transitions. [2018-11-28 12:27:31,726 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 319 transitions. Word has length 524 [2018-11-28 12:27:31,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:27:31,727 INFO L480 AbstractCegarLoop]: Abstraction has 241 states and 319 transitions. [2018-11-28 12:27:31,727 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-11-28 12:27:31,727 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 319 transitions. [2018-11-28 12:27:31,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 532 [2018-11-28 12:27:31,728 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:27:31,728 INFO L402 BasicCegarLoop]: trace histogram [75, 75, 74, 74, 74, 74, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:27:31,728 INFO L423 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:27:31,729 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:27:31,729 INFO L82 PathProgramCache]: Analyzing trace with hash -392311925, now seen corresponding path program 74 times [2018-11-28 12:27:31,729 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:27:31,729 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:27:31,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:27:31,729 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:27:31,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:27:31,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:27:33,182 INFO L134 CoverageAnalysis]: Checked inductivity of 19203 backedges. 0 proven. 8251 refuted. 0 times theorem prover too weak. 10952 trivial. 0 not checked. [2018-11-28 12:27:33,182 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:27:33,182 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/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 [2018-11-28 12:27:33,189 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 12:27:33,275 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 12:27:33,275 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:27:33,282 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:27:33,417 INFO L134 CoverageAnalysis]: Checked inductivity of 19203 backedges. 0 proven. 8251 refuted. 0 times theorem prover too weak. 10952 trivial. 0 not checked. [2018-11-28 12:27:33,432 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:27:33,432 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-11-28 12:27:33,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-11-28 12:27:33,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-11-28 12:27:33,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2930, Invalid=3232, Unknown=0, NotChecked=0, Total=6162 [2018-11-28 12:27:33,433 INFO L87 Difference]: Start difference. First operand 241 states and 319 transitions. Second operand 79 states. [2018-11-28 12:27:35,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:27:35,614 INFO L93 Difference]: Finished difference Result 248 states and 327 transitions. [2018-11-28 12:27:35,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-11-28 12:27:35,615 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 531 [2018-11-28 12:27:35,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:27:35,616 INFO L225 Difference]: With dead ends: 248 [2018-11-28 12:27:35,616 INFO L226 Difference]: Without dead ends: 244 [2018-11-28 12:27:35,618 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 [2018-11-28 12:27:35,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2018-11-28 12:27:35,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 244. [2018-11-28 12:27:35,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2018-11-28 12:27:35,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 323 transitions. [2018-11-28 12:27:35,678 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 323 transitions. Word has length 531 [2018-11-28 12:27:35,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:27:35,678 INFO L480 AbstractCegarLoop]: Abstraction has 244 states and 323 transitions. [2018-11-28 12:27:35,678 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-11-28 12:27:35,678 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 323 transitions. [2018-11-28 12:27:35,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 539 [2018-11-28 12:27:35,681 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:27:35,681 INFO L402 BasicCegarLoop]: trace histogram [76, 76, 75, 75, 75, 75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:27:35,681 INFO L423 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:27:35,681 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:27:35,682 INFO L82 PathProgramCache]: Analyzing trace with hash 1955591550, now seen corresponding path program 75 times [2018-11-28 12:27:35,682 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:27:35,682 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:27:35,682 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:27:35,682 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:27:35,682 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:27:35,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:27:37,181 INFO L134 CoverageAnalysis]: Checked inductivity of 19725 backedges. 0 proven. 8475 refuted. 0 times theorem prover too weak. 11250 trivial. 0 not checked. [2018-11-28 12:27:37,182 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:27:37,182 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/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 [2018-11-28 12:27:37,189 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 12:27:37,461 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) [2018-11-28 12:27:37,461 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:27:37,470 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:27:37,614 INFO L134 CoverageAnalysis]: Checked inductivity of 19725 backedges. 0 proven. 8475 refuted. 0 times theorem prover too weak. 11250 trivial. 0 not checked. [2018-11-28 12:27:37,629 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:27:37,629 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-11-28 12:27:37,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-11-28 12:27:37,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-11-28 12:27:37,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3007, Invalid=3313, Unknown=0, NotChecked=0, Total=6320 [2018-11-28 12:27:37,630 INFO L87 Difference]: Start difference. First operand 244 states and 323 transitions. Second operand 80 states. [2018-11-28 12:27:39,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:27:39,863 INFO L93 Difference]: Finished difference Result 251 states and 331 transitions. [2018-11-28 12:27:39,863 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-11-28 12:27:39,863 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 538 [2018-11-28 12:27:39,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:27:39,864 INFO L225 Difference]: With dead ends: 251 [2018-11-28 12:27:39,864 INFO L226 Difference]: Without dead ends: 247 [2018-11-28 12:27:39,865 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 [2018-11-28 12:27:39,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2018-11-28 12:27:39,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 247. [2018-11-28 12:27:39,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2018-11-28 12:27:39,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 327 transitions. [2018-11-28 12:27:39,912 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 327 transitions. Word has length 538 [2018-11-28 12:27:39,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:27:39,913 INFO L480 AbstractCegarLoop]: Abstraction has 247 states and 327 transitions. [2018-11-28 12:27:39,913 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-11-28 12:27:39,913 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 327 transitions. [2018-11-28 12:27:39,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 546 [2018-11-28 12:27:39,914 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:27:39,914 INFO L402 BasicCegarLoop]: trace histogram [77, 77, 76, 76, 76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:27:39,915 INFO L423 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:27:39,915 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:27:39,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1427684257, now seen corresponding path program 76 times [2018-11-28 12:27:39,915 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:27:39,915 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:27:39,915 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:27:39,915 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:27:39,915 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:27:39,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:27:41,453 INFO L134 CoverageAnalysis]: Checked inductivity of 20254 backedges. 0 proven. 8702 refuted. 0 times theorem prover too weak. 11552 trivial. 0 not checked. [2018-11-28 12:27:41,453 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:27:41,453 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/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 [2018-11-28 12:27:41,461 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 12:27:41,549 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 12:27:41,549 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:27:41,559 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:27:41,706 INFO L134 CoverageAnalysis]: Checked inductivity of 20254 backedges. 0 proven. 8702 refuted. 0 times theorem prover too weak. 11552 trivial. 0 not checked. [2018-11-28 12:27:41,721 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:27:41,722 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-11-28 12:27:41,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-11-28 12:27:41,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-11-28 12:27:41,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3085, Invalid=3395, Unknown=0, NotChecked=0, Total=6480 [2018-11-28 12:27:41,723 INFO L87 Difference]: Start difference. First operand 247 states and 327 transitions. Second operand 81 states. [2018-11-28 12:27:43,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:27:43,989 INFO L93 Difference]: Finished difference Result 254 states and 335 transitions. [2018-11-28 12:27:43,989 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-11-28 12:27:43,989 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 545 [2018-11-28 12:27:43,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:27:43,990 INFO L225 Difference]: With dead ends: 254 [2018-11-28 12:27:43,990 INFO L226 Difference]: Without dead ends: 250 [2018-11-28 12:27:43,991 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 778 GetRequests, 622 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3002 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=9245, Invalid=15561, Unknown=0, NotChecked=0, Total=24806 [2018-11-28 12:27:43,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2018-11-28 12:27:44,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 250. [2018-11-28 12:27:44,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2018-11-28 12:27:44,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 331 transitions. [2018-11-28 12:27:44,040 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 331 transitions. Word has length 545 [2018-11-28 12:27:44,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:27:44,040 INFO L480 AbstractCegarLoop]: Abstraction has 250 states and 331 transitions. [2018-11-28 12:27:44,040 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-11-28 12:27:44,040 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 331 transitions. [2018-11-28 12:27:44,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 553 [2018-11-28 12:27:44,042 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:27:44,042 INFO L402 BasicCegarLoop]: trace histogram [78, 78, 77, 77, 77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:27:44,042 INFO L423 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:27:44,042 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:27:44,042 INFO L82 PathProgramCache]: Analyzing trace with hash 963585256, now seen corresponding path program 77 times [2018-11-28 12:27:44,042 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:27:44,042 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:27:44,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:27:44,043 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:27:44,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:27:44,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:27:45,627 INFO L134 CoverageAnalysis]: Checked inductivity of 20790 backedges. 0 proven. 8932 refuted. 0 times theorem prover too weak. 11858 trivial. 0 not checked. [2018-11-28 12:27:45,627 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:27:45,627 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/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 [2018-11-28 12:27:45,635 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-28 12:27:45,970 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2018-11-28 12:27:45,971 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:27:45,985 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:27:46,135 INFO L134 CoverageAnalysis]: Checked inductivity of 20790 backedges. 0 proven. 8932 refuted. 0 times theorem prover too weak. 11858 trivial. 0 not checked. [2018-11-28 12:27:46,151 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:27:46,151 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2018-11-28 12:27:46,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-11-28 12:27:46,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-11-28 12:27:46,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3164, Invalid=3478, Unknown=0, NotChecked=0, Total=6642 [2018-11-28 12:27:46,152 INFO L87 Difference]: Start difference. First operand 250 states and 331 transitions. Second operand 82 states. [2018-11-28 12:27:48,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:27:48,407 INFO L93 Difference]: Finished difference Result 257 states and 339 transitions. [2018-11-28 12:27:48,407 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-11-28 12:27:48,407 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 552 [2018-11-28 12:27:48,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:27:48,408 INFO L225 Difference]: With dead ends: 257 [2018-11-28 12:27:48,409 INFO L226 Difference]: Without dead ends: 253 [2018-11-28 12:27:48,410 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 788 GetRequests, 630 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3080 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=9482, Invalid=15958, Unknown=0, NotChecked=0, Total=25440 [2018-11-28 12:27:48,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2018-11-28 12:27:48,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 253. [2018-11-28 12:27:48,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2018-11-28 12:27:48,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 335 transitions. [2018-11-28 12:27:48,460 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 335 transitions. Word has length 552 [2018-11-28 12:27:48,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:27:48,460 INFO L480 AbstractCegarLoop]: Abstraction has 253 states and 335 transitions. [2018-11-28 12:27:48,460 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-11-28 12:27:48,460 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 335 transitions. [2018-11-28 12:27:48,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 560 [2018-11-28 12:27:48,463 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:27:48,463 INFO L402 BasicCegarLoop]: trace histogram [79, 79, 78, 78, 78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:27:48,463 INFO L423 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:27:48,463 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:27:48,464 INFO L82 PathProgramCache]: Analyzing trace with hash -487877449, now seen corresponding path program 78 times [2018-11-28 12:27:48,464 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:27:48,464 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:27:48,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:27:48,464 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:27:48,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:27:48,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:27:50,090 INFO L134 CoverageAnalysis]: Checked inductivity of 21333 backedges. 0 proven. 9165 refuted. 0 times theorem prover too weak. 12168 trivial. 0 not checked. [2018-11-28 12:27:50,091 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:27:50,091 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/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 [2018-11-28 12:27:50,098 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-28 12:27:50,377 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2018-11-28 12:27:50,377 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:27:50,387 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:27:50,539 INFO L134 CoverageAnalysis]: Checked inductivity of 21333 backedges. 0 proven. 9165 refuted. 0 times theorem prover too weak. 12168 trivial. 0 not checked. [2018-11-28 12:27:50,554 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:27:50,554 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-11-28 12:27:50,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-11-28 12:27:50,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-11-28 12:27:50,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3244, Invalid=3562, Unknown=0, NotChecked=0, Total=6806 [2018-11-28 12:27:50,556 INFO L87 Difference]: Start difference. First operand 253 states and 335 transitions. Second operand 83 states. [2018-11-28 12:27:52,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:27:52,978 INFO L93 Difference]: Finished difference Result 260 states and 343 transitions. [2018-11-28 12:27:52,978 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-11-28 12:27:52,978 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 559 [2018-11-28 12:27:52,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:27:52,979 INFO L225 Difference]: With dead ends: 260 [2018-11-28 12:27:52,979 INFO L226 Difference]: Without dead ends: 256 [2018-11-28 12:27:52,981 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 798 GetRequests, 638 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3159 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=9722, Invalid=16360, Unknown=0, NotChecked=0, Total=26082 [2018-11-28 12:27:52,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2018-11-28 12:27:53,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 256. [2018-11-28 12:27:53,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2018-11-28 12:27:53,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 339 transitions. [2018-11-28 12:27:53,032 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 339 transitions. Word has length 559 [2018-11-28 12:27:53,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:27:53,032 INFO L480 AbstractCegarLoop]: Abstraction has 256 states and 339 transitions. [2018-11-28 12:27:53,032 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-11-28 12:27:53,032 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 339 transitions. [2018-11-28 12:27:53,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 567 [2018-11-28 12:27:53,034 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:27:53,034 INFO L402 BasicCegarLoop]: trace histogram [80, 80, 79, 79, 79, 79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:27:53,034 INFO L423 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:27:53,034 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:27:53,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1246094510, now seen corresponding path program 79 times [2018-11-28 12:27:53,035 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:27:53,035 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:27:53,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:27:53,035 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:27:53,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:27:53,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:27:54,695 INFO L134 CoverageAnalysis]: Checked inductivity of 21883 backedges. 0 proven. 9401 refuted. 0 times theorem prover too weak. 12482 trivial. 0 not checked. [2018-11-28 12:27:54,696 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:27:54,696 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/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 [2018-11-28 12:27:54,704 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:27:54,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:27:54,796 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:27:54,931 INFO L134 CoverageAnalysis]: Checked inductivity of 21883 backedges. 0 proven. 9401 refuted. 0 times theorem prover too weak. 12482 trivial. 0 not checked. [2018-11-28 12:27:54,946 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:27:54,946 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-11-28 12:27:54,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-11-28 12:27:54,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-11-28 12:27:54,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3325, Invalid=3647, Unknown=0, NotChecked=0, Total=6972 [2018-11-28 12:27:54,948 INFO L87 Difference]: Start difference. First operand 256 states and 339 transitions. Second operand 84 states. [2018-11-28 12:27:57,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:27:57,346 INFO L93 Difference]: Finished difference Result 263 states and 347 transitions. [2018-11-28 12:27:57,346 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-11-28 12:27:57,346 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 566 [2018-11-28 12:27:57,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:27:57,347 INFO L225 Difference]: With dead ends: 263 [2018-11-28 12:27:57,347 INFO L226 Difference]: Without dead ends: 259 [2018-11-28 12:27:57,349 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 808 GetRequests, 646 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3239 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=9965, Invalid=16767, Unknown=0, NotChecked=0, Total=26732 [2018-11-28 12:27:57,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2018-11-28 12:27:57,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 259. [2018-11-28 12:27:57,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2018-11-28 12:27:57,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 343 transitions. [2018-11-28 12:27:57,402 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 343 transitions. Word has length 566 [2018-11-28 12:27:57,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:27:57,403 INFO L480 AbstractCegarLoop]: Abstraction has 259 states and 343 transitions. [2018-11-28 12:27:57,403 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-11-28 12:27:57,403 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 343 transitions. [2018-11-28 12:27:57,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 574 [2018-11-28 12:27:57,406 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:27:57,406 INFO L402 BasicCegarLoop]: trace histogram [81, 81, 80, 80, 80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:27:57,406 INFO L423 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:27:57,406 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:27:57,406 INFO L82 PathProgramCache]: Analyzing trace with hash -994642227, now seen corresponding path program 80 times [2018-11-28 12:27:57,406 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:27:57,406 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:27:57,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:27:57,407 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:27:57,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:27:57,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:27:59,114 INFO L134 CoverageAnalysis]: Checked inductivity of 22440 backedges. 0 proven. 9640 refuted. 0 times theorem prover too weak. 12800 trivial. 0 not checked. [2018-11-28 12:27:59,114 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:27:59,114 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/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 [2018-11-28 12:27:59,122 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 12:27:59,209 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 12:27:59,210 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:27:59,217 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:27:59,356 INFO L134 CoverageAnalysis]: Checked inductivity of 22440 backedges. 0 proven. 9640 refuted. 0 times theorem prover too weak. 12800 trivial. 0 not checked. [2018-11-28 12:27:59,371 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:27:59,371 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-11-28 12:27:59,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-11-28 12:27:59,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-11-28 12:27:59,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3407, Invalid=3733, Unknown=0, NotChecked=0, Total=7140 [2018-11-28 12:27:59,372 INFO L87 Difference]: Start difference. First operand 259 states and 343 transitions. Second operand 85 states. [2018-11-28 12:28:01,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:28:01,813 INFO L93 Difference]: Finished difference Result 266 states and 351 transitions. [2018-11-28 12:28:01,813 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-11-28 12:28:01,813 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 573 [2018-11-28 12:28:01,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:28:01,815 INFO L225 Difference]: With dead ends: 266 [2018-11-28 12:28:01,815 INFO L226 Difference]: Without dead ends: 262 [2018-11-28 12:28:01,816 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 818 GetRequests, 654 SyntacticMatches, 0 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3320 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=10211, Invalid=17179, Unknown=0, NotChecked=0, Total=27390 [2018-11-28 12:28:01,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2018-11-28 12:28:01,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 262. [2018-11-28 12:28:01,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2018-11-28 12:28:01,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 347 transitions. [2018-11-28 12:28:01,873 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 347 transitions. Word has length 573 [2018-11-28 12:28:01,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:28:01,873 INFO L480 AbstractCegarLoop]: Abstraction has 262 states and 347 transitions. [2018-11-28 12:28:01,873 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-11-28 12:28:01,873 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 347 transitions. [2018-11-28 12:28:01,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 581 [2018-11-28 12:28:01,876 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:28:01,876 INFO L402 BasicCegarLoop]: trace histogram [82, 82, 81, 81, 81, 81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:28:01,877 INFO L423 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:28:01,877 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:28:01,877 INFO L82 PathProgramCache]: Analyzing trace with hash -893372228, now seen corresponding path program 81 times [2018-11-28 12:28:01,877 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:28:01,877 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:28:01,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:28:01,878 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:28:01,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:28:01,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:28:03,607 INFO L134 CoverageAnalysis]: Checked inductivity of 23004 backedges. 0 proven. 9882 refuted. 0 times theorem prover too weak. 13122 trivial. 0 not checked. [2018-11-28 12:28:03,607 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:28:03,607 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/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 [2018-11-28 12:28:03,614 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 12:28:03,926 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 82 check-sat command(s) [2018-11-28 12:28:03,926 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:28:03,936 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:28:04,087 INFO L134 CoverageAnalysis]: Checked inductivity of 23004 backedges. 0 proven. 9882 refuted. 0 times theorem prover too weak. 13122 trivial. 0 not checked. [2018-11-28 12:28:04,102 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:28:04,102 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2018-11-28 12:28:04,103 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-11-28 12:28:04,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-11-28 12:28:04,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3490, Invalid=3820, Unknown=0, NotChecked=0, Total=7310 [2018-11-28 12:28:04,103 INFO L87 Difference]: Start difference. First operand 262 states and 347 transitions. Second operand 86 states. [2018-11-28 12:28:06,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:28:06,635 INFO L93 Difference]: Finished difference Result 269 states and 355 transitions. [2018-11-28 12:28:06,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-11-28 12:28:06,635 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 580 [2018-11-28 12:28:06,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:28:06,636 INFO L225 Difference]: With dead ends: 269 [2018-11-28 12:28:06,636 INFO L226 Difference]: Without dead ends: 265 [2018-11-28 12:28:06,637 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 828 GetRequests, 662 SyntacticMatches, 0 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3402 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=10460, Invalid=17596, Unknown=0, NotChecked=0, Total=28056 [2018-11-28 12:28:06,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2018-11-28 12:28:06,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 265. [2018-11-28 12:28:06,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2018-11-28 12:28:06,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 351 transitions. [2018-11-28 12:28:06,694 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 351 transitions. Word has length 580 [2018-11-28 12:28:06,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:28:06,694 INFO L480 AbstractCegarLoop]: Abstraction has 265 states and 351 transitions. [2018-11-28 12:28:06,694 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-11-28 12:28:06,694 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 351 transitions. [2018-11-28 12:28:06,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 588 [2018-11-28 12:28:06,696 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:28:06,696 INFO L402 BasicCegarLoop]: trace histogram [83, 83, 82, 82, 82, 82, 82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:28:06,696 INFO L423 AbstractCegarLoop]: === Iteration 83 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:28:06,696 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:28:06,696 INFO L82 PathProgramCache]: Analyzing trace with hash 2092663267, now seen corresponding path program 82 times [2018-11-28 12:28:06,696 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:28:06,696 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:28:06,697 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:28:06,697 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:28:06,697 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:28:06,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:28:08,456 INFO L134 CoverageAnalysis]: Checked inductivity of 23575 backedges. 0 proven. 10127 refuted. 0 times theorem prover too weak. 13448 trivial. 0 not checked. [2018-11-28 12:28:08,456 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:28:08,456 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/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 [2018-11-28 12:28:08,464 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 12:28:08,561 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 12:28:08,561 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:28:08,573 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:28:08,754 INFO L134 CoverageAnalysis]: Checked inductivity of 23575 backedges. 0 proven. 10127 refuted. 0 times theorem prover too weak. 13448 trivial. 0 not checked. [2018-11-28 12:28:08,770 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:28:08,770 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-11-28 12:28:08,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-11-28 12:28:08,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-11-28 12:28:08,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3574, Invalid=3908, Unknown=0, NotChecked=0, Total=7482 [2018-11-28 12:28:08,772 INFO L87 Difference]: Start difference. First operand 265 states and 351 transitions. Second operand 87 states. [2018-11-28 12:28:11,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:28:11,588 INFO L93 Difference]: Finished difference Result 272 states and 359 transitions. [2018-11-28 12:28:11,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-11-28 12:28:11,588 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 587 [2018-11-28 12:28:11,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:28:11,590 INFO L225 Difference]: With dead ends: 272 [2018-11-28 12:28:11,590 INFO L226 Difference]: Without dead ends: 268 [2018-11-28 12:28:11,592 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 838 GetRequests, 670 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3485 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=10712, Invalid=18018, Unknown=0, NotChecked=0, Total=28730 [2018-11-28 12:28:11,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2018-11-28 12:28:11,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 268. [2018-11-28 12:28:11,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2018-11-28 12:28:11,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 355 transitions. [2018-11-28 12:28:11,659 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 355 transitions. Word has length 587 [2018-11-28 12:28:11,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:28:11,660 INFO L480 AbstractCegarLoop]: Abstraction has 268 states and 355 transitions. [2018-11-28 12:28:11,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-11-28 12:28:11,660 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 355 transitions. [2018-11-28 12:28:11,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 595 [2018-11-28 12:28:11,663 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:28:11,663 INFO L402 BasicCegarLoop]: trace histogram [84, 84, 83, 83, 83, 83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:28:11,663 INFO L423 AbstractCegarLoop]: === Iteration 84 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:28:11,664 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:28:11,664 INFO L82 PathProgramCache]: Analyzing trace with hash -1154425562, now seen corresponding path program 83 times [2018-11-28 12:28:11,664 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:28:11,664 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:28:11,664 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:28:11,664 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:28:11,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:28:11,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:28:13,512 INFO L134 CoverageAnalysis]: Checked inductivity of 24153 backedges. 0 proven. 10375 refuted. 0 times theorem prover too weak. 13778 trivial. 0 not checked. [2018-11-28 12:28:13,513 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:28:13,513 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/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 [2018-11-28 12:28:13,521 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-28 12:28:13,916 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 84 check-sat command(s) [2018-11-28 12:28:13,916 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:28:13,934 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:28:14,085 INFO L134 CoverageAnalysis]: Checked inductivity of 24153 backedges. 0 proven. 10375 refuted. 0 times theorem prover too weak. 13778 trivial. 0 not checked. [2018-11-28 12:28:14,111 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:28:14,111 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2018-11-28 12:28:14,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-11-28 12:28:14,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-11-28 12:28:14,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3659, Invalid=3997, Unknown=0, NotChecked=0, Total=7656 [2018-11-28 12:28:14,112 INFO L87 Difference]: Start difference. First operand 268 states and 355 transitions. Second operand 88 states. [2018-11-28 12:28:16,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:28:16,761 INFO L93 Difference]: Finished difference Result 275 states and 363 transitions. [2018-11-28 12:28:16,762 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-11-28 12:28:16,762 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 594 [2018-11-28 12:28:16,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:28:16,763 INFO L225 Difference]: With dead ends: 275 [2018-11-28 12:28:16,763 INFO L226 Difference]: Without dead ends: 271 [2018-11-28 12:28:16,765 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 [2018-11-28 12:28:16,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2018-11-28 12:28:16,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 271. [2018-11-28 12:28:16,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2018-11-28 12:28:16,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 359 transitions. [2018-11-28 12:28:16,825 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 359 transitions. Word has length 594 [2018-11-28 12:28:16,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:28:16,825 INFO L480 AbstractCegarLoop]: Abstraction has 271 states and 359 transitions. [2018-11-28 12:28:16,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-11-28 12:28:16,825 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 359 transitions. [2018-11-28 12:28:16,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 602 [2018-11-28 12:28:16,829 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:28:16,829 INFO L402 BasicCegarLoop]: trace histogram [85, 85, 84, 84, 84, 84, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:28:16,829 INFO L423 AbstractCegarLoop]: === Iteration 85 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:28:16,829 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:28:16,829 INFO L82 PathProgramCache]: Analyzing trace with hash 987354617, now seen corresponding path program 84 times [2018-11-28 12:28:16,829 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:28:16,829 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:28:16,830 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:28:16,830 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:28:16,830 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:28:16,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:28:18,680 INFO L134 CoverageAnalysis]: Checked inductivity of 24738 backedges. 0 proven. 10626 refuted. 0 times theorem prover too weak. 14112 trivial. 0 not checked. [2018-11-28 12:28:18,680 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:28:18,680 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/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 [2018-11-28 12:28:18,687 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-28 12:28:19,025 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 85 check-sat command(s) [2018-11-28 12:28:19,025 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:28:19,040 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:28:19,227 INFO L134 CoverageAnalysis]: Checked inductivity of 24738 backedges. 0 proven. 10626 refuted. 0 times theorem prover too weak. 14112 trivial. 0 not checked. [2018-11-28 12:28:19,242 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:28:19,242 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-11-28 12:28:19,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-11-28 12:28:19,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-11-28 12:28:19,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3745, Invalid=4087, Unknown=0, NotChecked=0, Total=7832 [2018-11-28 12:28:19,243 INFO L87 Difference]: Start difference. First operand 271 states and 359 transitions. Second operand 89 states. [2018-11-28 12:28:21,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:28:21,947 INFO L93 Difference]: Finished difference Result 278 states and 367 transitions. [2018-11-28 12:28:21,948 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-11-28 12:28:21,948 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 601 [2018-11-28 12:28:21,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:28:21,949 INFO L225 Difference]: With dead ends: 278 [2018-11-28 12:28:21,949 INFO L226 Difference]: Without dead ends: 274 [2018-11-28 12:28:21,950 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 858 GetRequests, 686 SyntacticMatches, 0 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3654 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=11225, Invalid=18877, Unknown=0, NotChecked=0, Total=30102 [2018-11-28 12:28:21,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2018-11-28 12:28:22,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 274. [2018-11-28 12:28:22,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2018-11-28 12:28:22,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 363 transitions. [2018-11-28 12:28:22,012 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 363 transitions. Word has length 601 [2018-11-28 12:28:22,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:28:22,012 INFO L480 AbstractCegarLoop]: Abstraction has 274 states and 363 transitions. [2018-11-28 12:28:22,012 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-11-28 12:28:22,012 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 363 transitions. [2018-11-28 12:28:22,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 609 [2018-11-28 12:28:22,015 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:28:22,015 INFO L402 BasicCegarLoop]: trace histogram [86, 86, 85, 85, 85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:28:22,015 INFO L423 AbstractCegarLoop]: === Iteration 86 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:28:22,015 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:28:22,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1293641872, now seen corresponding path program 85 times [2018-11-28 12:28:22,015 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:28:22,015 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:28:22,016 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:28:22,016 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:28:22,016 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:28:22,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:28:23,905 INFO L134 CoverageAnalysis]: Checked inductivity of 25330 backedges. 0 proven. 10880 refuted. 0 times theorem prover too weak. 14450 trivial. 0 not checked. [2018-11-28 12:28:23,906 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:28:23,906 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/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 [2018-11-28 12:28:23,913 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:28:24,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:28:24,011 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:28:24,175 INFO L134 CoverageAnalysis]: Checked inductivity of 25330 backedges. 0 proven. 10880 refuted. 0 times theorem prover too weak. 14450 trivial. 0 not checked. [2018-11-28 12:28:24,190 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:28:24,190 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2018-11-28 12:28:24,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-11-28 12:28:24,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-11-28 12:28:24,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3832, Invalid=4178, Unknown=0, NotChecked=0, Total=8010 [2018-11-28 12:28:24,192 INFO L87 Difference]: Start difference. First operand 274 states and 363 transitions. Second operand 90 states. [2018-11-28 12:28:26,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:28:26,973 INFO L93 Difference]: Finished difference Result 281 states and 371 transitions. [2018-11-28 12:28:26,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-11-28 12:28:26,973 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 608 [2018-11-28 12:28:26,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:28:26,974 INFO L225 Difference]: With dead ends: 281 [2018-11-28 12:28:26,974 INFO L226 Difference]: Without dead ends: 277 [2018-11-28 12:28:26,975 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 868 GetRequests, 694 SyntacticMatches, 0 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3740 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=11486, Invalid=19314, Unknown=0, NotChecked=0, Total=30800 [2018-11-28 12:28:26,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2018-11-28 12:28:27,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 277. [2018-11-28 12:28:27,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2018-11-28 12:28:27,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 367 transitions. [2018-11-28 12:28:27,038 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 367 transitions. Word has length 608 [2018-11-28 12:28:27,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:28:27,038 INFO L480 AbstractCegarLoop]: Abstraction has 277 states and 367 transitions. [2018-11-28 12:28:27,038 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-11-28 12:28:27,038 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 367 transitions. [2018-11-28 12:28:27,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 616 [2018-11-28 12:28:27,040 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:28:27,040 INFO L402 BasicCegarLoop]: trace histogram [87, 87, 86, 86, 86, 86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:28:27,040 INFO L423 AbstractCegarLoop]: === Iteration 87 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:28:27,040 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:28:27,040 INFO L82 PathProgramCache]: Analyzing trace with hash 982684431, now seen corresponding path program 86 times [2018-11-28 12:28:27,040 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:28:27,041 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:28:27,041 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:28:27,041 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:28:27,041 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:28:27,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:28:28,996 INFO L134 CoverageAnalysis]: Checked inductivity of 25929 backedges. 0 proven. 11137 refuted. 0 times theorem prover too weak. 14792 trivial. 0 not checked. [2018-11-28 12:28:28,996 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:28:28,997 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/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 [2018-11-28 12:28:29,006 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 12:28:29,108 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 12:28:29,109 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:28:29,117 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:28:29,281 INFO L134 CoverageAnalysis]: Checked inductivity of 25929 backedges. 0 proven. 11137 refuted. 0 times theorem prover too weak. 14792 trivial. 0 not checked. [2018-11-28 12:28:29,296 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:28:29,297 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-11-28 12:28:29,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-11-28 12:28:29,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-11-28 12:28:29,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3920, Invalid=4270, Unknown=0, NotChecked=0, Total=8190 [2018-11-28 12:28:29,298 INFO L87 Difference]: Start difference. First operand 277 states and 367 transitions. Second operand 91 states. [2018-11-28 12:28:32,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:28:32,225 INFO L93 Difference]: Finished difference Result 284 states and 375 transitions. [2018-11-28 12:28:32,225 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-11-28 12:28:32,225 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 615 [2018-11-28 12:28:32,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:28:32,227 INFO L225 Difference]: With dead ends: 284 [2018-11-28 12:28:32,227 INFO L226 Difference]: Without dead ends: 280 [2018-11-28 12:28:32,229 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 878 GetRequests, 702 SyntacticMatches, 0 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3827 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=11750, Invalid=19756, Unknown=0, NotChecked=0, Total=31506 [2018-11-28 12:28:32,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2018-11-28 12:28:32,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 280. [2018-11-28 12:28:32,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2018-11-28 12:28:32,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 371 transitions. [2018-11-28 12:28:32,300 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 371 transitions. Word has length 615 [2018-11-28 12:28:32,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:28:32,300 INFO L480 AbstractCegarLoop]: Abstraction has 280 states and 371 transitions. [2018-11-28 12:28:32,300 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-11-28 12:28:32,300 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 371 transitions. [2018-11-28 12:28:32,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 623 [2018-11-28 12:28:32,303 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:28:32,303 INFO L402 BasicCegarLoop]: trace histogram [88, 88, 87, 87, 87, 87, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:28:32,304 INFO L423 AbstractCegarLoop]: === Iteration 88 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:28:32,304 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:28:32,304 INFO L82 PathProgramCache]: Analyzing trace with hash -336643334, now seen corresponding path program 87 times [2018-11-28 12:28:32,304 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:28:32,304 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:28:32,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:28:32,305 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:28:32,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:28:32,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:28:34,296 INFO L134 CoverageAnalysis]: Checked inductivity of 26535 backedges. 0 proven. 11397 refuted. 0 times theorem prover too weak. 15138 trivial. 0 not checked. [2018-11-28 12:28:34,297 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:28:34,297 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/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 [2018-11-28 12:28:34,303 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 12:28:34,672 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 88 check-sat command(s) [2018-11-28 12:28:34,672 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:28:34,684 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:28:34,856 INFO L134 CoverageAnalysis]: Checked inductivity of 26535 backedges. 0 proven. 11397 refuted. 0 times theorem prover too weak. 15138 trivial. 0 not checked. [2018-11-28 12:28:34,872 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:28:34,873 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 92 [2018-11-28 12:28:34,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-11-28 12:28:34,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-11-28 12:28:34,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4009, Invalid=4363, Unknown=0, NotChecked=0, Total=8372 [2018-11-28 12:28:34,874 INFO L87 Difference]: Start difference. First operand 280 states and 371 transitions. Second operand 92 states. [2018-11-28 12:28:37,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:28:37,745 INFO L93 Difference]: Finished difference Result 287 states and 379 transitions. [2018-11-28 12:28:37,745 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-11-28 12:28:37,745 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 622 [2018-11-28 12:28:37,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:28:37,746 INFO L225 Difference]: With dead ends: 287 [2018-11-28 12:28:37,746 INFO L226 Difference]: Without dead ends: 283 [2018-11-28 12:28:37,747 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 888 GetRequests, 710 SyntacticMatches, 0 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3915 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=12017, Invalid=20203, Unknown=0, NotChecked=0, Total=32220 [2018-11-28 12:28:37,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2018-11-28 12:28:37,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 283. [2018-11-28 12:28:37,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 283 states. [2018-11-28 12:28:37,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 375 transitions. [2018-11-28 12:28:37,812 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 375 transitions. Word has length 622 [2018-11-28 12:28:37,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:28:37,812 INFO L480 AbstractCegarLoop]: Abstraction has 283 states and 375 transitions. [2018-11-28 12:28:37,813 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-11-28 12:28:37,813 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 375 transitions. [2018-11-28 12:28:37,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 630 [2018-11-28 12:28:37,815 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:28:37,815 INFO L402 BasicCegarLoop]: trace histogram [89, 89, 88, 88, 88, 88, 88, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:28:37,815 INFO L423 AbstractCegarLoop]: === Iteration 89 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:28:37,815 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:28:37,815 INFO L82 PathProgramCache]: Analyzing trace with hash 554064165, now seen corresponding path program 88 times [2018-11-28 12:28:37,815 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:28:37,815 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:28:37,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:28:37,816 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:28:37,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:28:37,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:28:39,943 INFO L134 CoverageAnalysis]: Checked inductivity of 27148 backedges. 0 proven. 11660 refuted. 0 times theorem prover too weak. 15488 trivial. 0 not checked. [2018-11-28 12:28:39,944 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:28:39,944 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/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 [2018-11-28 12:28:39,951 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 12:28:40,052 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 12:28:40,052 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:28:40,064 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:28:40,228 INFO L134 CoverageAnalysis]: Checked inductivity of 27148 backedges. 0 proven. 11660 refuted. 0 times theorem prover too weak. 15488 trivial. 0 not checked. [2018-11-28 12:28:40,243 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:28:40,244 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-11-28 12:28:40,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-11-28 12:28:40,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-11-28 12:28:40,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4099, Invalid=4457, Unknown=0, NotChecked=0, Total=8556 [2018-11-28 12:28:40,245 INFO L87 Difference]: Start difference. First operand 283 states and 375 transitions. Second operand 93 states. [2018-11-28 12:28:43,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:28:43,325 INFO L93 Difference]: Finished difference Result 290 states and 383 transitions. [2018-11-28 12:28:43,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-11-28 12:28:43,325 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 629 [2018-11-28 12:28:43,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:28:43,326 INFO L225 Difference]: With dead ends: 290 [2018-11-28 12:28:43,326 INFO L226 Difference]: Without dead ends: 286 [2018-11-28 12:28:43,328 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 898 GetRequests, 718 SyntacticMatches, 0 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4004 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=12287, Invalid=20655, Unknown=0, NotChecked=0, Total=32942 [2018-11-28 12:28:43,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2018-11-28 12:28:43,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 286. [2018-11-28 12:28:43,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2018-11-28 12:28:43,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 379 transitions. [2018-11-28 12:28:43,397 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 379 transitions. Word has length 629 [2018-11-28 12:28:43,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:28:43,397 INFO L480 AbstractCegarLoop]: Abstraction has 286 states and 379 transitions. [2018-11-28 12:28:43,397 INFO L481 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-11-28 12:28:43,397 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 379 transitions. [2018-11-28 12:28:43,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 637 [2018-11-28 12:28:43,400 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:28:43,401 INFO L402 BasicCegarLoop]: trace histogram [90, 90, 89, 89, 89, 89, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:28:43,401 INFO L423 AbstractCegarLoop]: === Iteration 90 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:28:43,401 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:28:43,401 INFO L82 PathProgramCache]: Analyzing trace with hash -897862556, now seen corresponding path program 89 times [2018-11-28 12:28:43,401 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:28:43,401 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:28:43,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:28:43,402 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:28:43,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:28:43,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:28:45,462 INFO L134 CoverageAnalysis]: Checked inductivity of 27768 backedges. 0 proven. 11926 refuted. 0 times theorem prover too weak. 15842 trivial. 0 not checked. [2018-11-28 12:28:45,463 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:28:45,463 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/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 [2018-11-28 12:28:45,470 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-28 12:28:45,909 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 90 check-sat command(s) [2018-11-28 12:28:45,909 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:28:45,928 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:28:46,105 INFO L134 CoverageAnalysis]: Checked inductivity of 27768 backedges. 0 proven. 11926 refuted. 0 times theorem prover too weak. 15842 trivial. 0 not checked. [2018-11-28 12:28:46,121 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:28:46,121 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 94 [2018-11-28 12:28:46,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-11-28 12:28:46,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-11-28 12:28:46,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4190, Invalid=4552, Unknown=0, NotChecked=0, Total=8742 [2018-11-28 12:28:46,122 INFO L87 Difference]: Start difference. First operand 286 states and 379 transitions. Second operand 94 states. [2018-11-28 12:28:49,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:28:49,142 INFO L93 Difference]: Finished difference Result 293 states and 387 transitions. [2018-11-28 12:28:49,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-11-28 12:28:49,143 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 636 [2018-11-28 12:28:49,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:28:49,144 INFO L225 Difference]: With dead ends: 293 [2018-11-28 12:28:49,144 INFO L226 Difference]: Without dead ends: 289 [2018-11-28 12:28:49,146 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 908 GetRequests, 726 SyntacticMatches, 0 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4094 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=12560, Invalid=21112, Unknown=0, NotChecked=0, Total=33672 [2018-11-28 12:28:49,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2018-11-28 12:28:49,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 289. [2018-11-28 12:28:49,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 289 states. [2018-11-28 12:28:49,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 383 transitions. [2018-11-28 12:28:49,219 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 383 transitions. Word has length 636 [2018-11-28 12:28:49,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:28:49,220 INFO L480 AbstractCegarLoop]: Abstraction has 289 states and 383 transitions. [2018-11-28 12:28:49,220 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-11-28 12:28:49,220 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 383 transitions. [2018-11-28 12:28:49,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 644 [2018-11-28 12:28:49,223 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:28:49,223 INFO L402 BasicCegarLoop]: trace histogram [91, 91, 90, 90, 90, 90, 90, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:28:49,224 INFO L423 AbstractCegarLoop]: === Iteration 91 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:28:49,224 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:28:49,224 INFO L82 PathProgramCache]: Analyzing trace with hash 1526057019, now seen corresponding path program 90 times [2018-11-28 12:28:49,224 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:28:49,224 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:28:49,224 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:28:49,224 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:28:49,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:28:49,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:28:51,396 INFO L134 CoverageAnalysis]: Checked inductivity of 28395 backedges. 0 proven. 12195 refuted. 0 times theorem prover too weak. 16200 trivial. 0 not checked. [2018-11-28 12:28:51,397 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:28:51,397 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/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 [2018-11-28 12:28:51,405 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-28 12:28:51,759 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 91 check-sat command(s) [2018-11-28 12:28:51,759 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:28:51,770 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:28:51,948 INFO L134 CoverageAnalysis]: Checked inductivity of 28395 backedges. 0 proven. 12195 refuted. 0 times theorem prover too weak. 16200 trivial. 0 not checked. [2018-11-28 12:28:51,964 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:28:51,964 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-11-28 12:28:51,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-11-28 12:28:51,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-11-28 12:28:51,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4282, Invalid=4648, Unknown=0, NotChecked=0, Total=8930 [2018-11-28 12:28:51,966 INFO L87 Difference]: Start difference. First operand 289 states and 383 transitions. Second operand 95 states. [2018-11-28 12:28:55,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:28:55,216 INFO L93 Difference]: Finished difference Result 296 states and 391 transitions. [2018-11-28 12:28:55,216 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-11-28 12:28:55,216 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 643 [2018-11-28 12:28:55,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:28:55,217 INFO L225 Difference]: With dead ends: 296 [2018-11-28 12:28:55,217 INFO L226 Difference]: Without dead ends: 292 [2018-11-28 12:28:55,218 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 918 GetRequests, 734 SyntacticMatches, 0 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4185 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=12836, Invalid=21574, Unknown=0, NotChecked=0, Total=34410 [2018-11-28 12:28:55,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2018-11-28 12:28:55,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 292. [2018-11-28 12:28:55,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 292 states. [2018-11-28 12:28:55,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 387 transitions. [2018-11-28 12:28:55,294 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 387 transitions. Word has length 643 [2018-11-28 12:28:55,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:28:55,294 INFO L480 AbstractCegarLoop]: Abstraction has 292 states and 387 transitions. [2018-11-28 12:28:55,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-11-28 12:28:55,294 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 387 transitions. [2018-11-28 12:28:55,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 651 [2018-11-28 12:28:55,296 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:28:55,297 INFO L402 BasicCegarLoop]: trace histogram [92, 92, 91, 91, 91, 91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:28:55,297 INFO L423 AbstractCegarLoop]: === Iteration 92 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:28:55,297 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:28:55,297 INFO L82 PathProgramCache]: Analyzing trace with hash 82851022, now seen corresponding path program 91 times [2018-11-28 12:28:55,297 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:28:55,297 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:28:55,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:28:55,297 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:28:55,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:28:55,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:28:57,502 INFO L134 CoverageAnalysis]: Checked inductivity of 29029 backedges. 0 proven. 12467 refuted. 0 times theorem prover too weak. 16562 trivial. 0 not checked. [2018-11-28 12:28:57,502 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:28:57,502 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/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 [2018-11-28 12:28:57,510 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:28:57,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:28:57,622 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:28:57,822 INFO L134 CoverageAnalysis]: Checked inductivity of 29029 backedges. 0 proven. 12467 refuted. 0 times theorem prover too weak. 16562 trivial. 0 not checked. [2018-11-28 12:28:57,838 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:28:57,838 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 96 [2018-11-28 12:28:57,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-11-28 12:28:57,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-11-28 12:28:57,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4375, Invalid=4745, Unknown=0, NotChecked=0, Total=9120 [2018-11-28 12:28:57,840 INFO L87 Difference]: Start difference. First operand 292 states and 387 transitions. Second operand 96 states. [2018-11-28 12:29:01,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:29:01,079 INFO L93 Difference]: Finished difference Result 299 states and 395 transitions. [2018-11-28 12:29:01,079 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-11-28 12:29:01,079 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 650 [2018-11-28 12:29:01,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:29:01,080 INFO L225 Difference]: With dead ends: 299 [2018-11-28 12:29:01,081 INFO L226 Difference]: Without dead ends: 295 [2018-11-28 12:29:01,082 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 928 GetRequests, 742 SyntacticMatches, 0 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4277 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=13115, Invalid=22041, Unknown=0, NotChecked=0, Total=35156 [2018-11-28 12:29:01,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2018-11-28 12:29:01,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 295. [2018-11-28 12:29:01,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 295 states. [2018-11-28 12:29:01,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 391 transitions. [2018-11-28 12:29:01,159 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 391 transitions. Word has length 650 [2018-11-28 12:29:01,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:29:01,159 INFO L480 AbstractCegarLoop]: Abstraction has 295 states and 391 transitions. [2018-11-28 12:29:01,159 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-11-28 12:29:01,159 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 391 transitions. [2018-11-28 12:29:01,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 658 [2018-11-28 12:29:01,163 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:29:01,163 INFO L402 BasicCegarLoop]: trace histogram [93, 93, 92, 92, 92, 92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:29:01,163 INFO L423 AbstractCegarLoop]: === Iteration 93 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:29:01,163 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:29:01,163 INFO L82 PathProgramCache]: Analyzing trace with hash 2059501649, now seen corresponding path program 92 times [2018-11-28 12:29:01,163 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:29:01,164 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:29:01,164 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:29:01,164 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:29:01,164 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:29:01,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:29:03,380 INFO L134 CoverageAnalysis]: Checked inductivity of 29670 backedges. 0 proven. 12742 refuted. 0 times theorem prover too weak. 16928 trivial. 0 not checked. [2018-11-28 12:29:03,380 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:29:03,380 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/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 [2018-11-28 12:29:03,396 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 12:29:03,500 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 12:29:03,501 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:29:03,509 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:29:03,687 INFO L134 CoverageAnalysis]: Checked inductivity of 29670 backedges. 0 proven. 12742 refuted. 0 times theorem prover too weak. 16928 trivial. 0 not checked. [2018-11-28 12:29:03,702 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:29:03,702 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-11-28 12:29:03,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-11-28 12:29:03,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-11-28 12:29:03,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4469, Invalid=4843, Unknown=0, NotChecked=0, Total=9312 [2018-11-28 12:29:03,704 INFO L87 Difference]: Start difference. First operand 295 states and 391 transitions. Second operand 97 states. [2018-11-28 12:29:06,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:29:06,997 INFO L93 Difference]: Finished difference Result 302 states and 399 transitions. [2018-11-28 12:29:06,997 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-11-28 12:29:06,997 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 657 [2018-11-28 12:29:06,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:29:06,999 INFO L225 Difference]: With dead ends: 302 [2018-11-28 12:29:06,999 INFO L226 Difference]: Without dead ends: 298 [2018-11-28 12:29:07,001 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 938 GetRequests, 750 SyntacticMatches, 0 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4370 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=13397, Invalid=22513, Unknown=0, NotChecked=0, Total=35910 [2018-11-28 12:29:07,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2018-11-28 12:29:07,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 298. [2018-11-28 12:29:07,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 298 states. [2018-11-28 12:29:07,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 395 transitions. [2018-11-28 12:29:07,081 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 395 transitions. Word has length 657 [2018-11-28 12:29:07,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:29:07,082 INFO L480 AbstractCegarLoop]: Abstraction has 298 states and 395 transitions. [2018-11-28 12:29:07,082 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-11-28 12:29:07,082 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 395 transitions. [2018-11-28 12:29:07,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 665 [2018-11-28 12:29:07,085 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:29:07,086 INFO L402 BasicCegarLoop]: trace histogram [94, 94, 93, 93, 93, 93, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:29:07,086 INFO L423 AbstractCegarLoop]: === Iteration 94 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:29:07,086 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:29:07,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1025762248, now seen corresponding path program 93 times [2018-11-28 12:29:07,086 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:29:07,086 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:29:07,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:29:07,087 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:29:07,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:29:07,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:29:09,353 INFO L134 CoverageAnalysis]: Checked inductivity of 30318 backedges. 0 proven. 13020 refuted. 0 times theorem prover too weak. 17298 trivial. 0 not checked. [2018-11-28 12:29:09,353 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:29:09,353 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/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 [2018-11-28 12:29:09,363 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 12:29:09,777 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 94 check-sat command(s) [2018-11-28 12:29:09,777 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:29:09,789 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:29:09,986 INFO L134 CoverageAnalysis]: Checked inductivity of 30318 backedges. 0 proven. 13020 refuted. 0 times theorem prover too weak. 17298 trivial. 0 not checked. [2018-11-28 12:29:10,002 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:29:10,002 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 98 [2018-11-28 12:29:10,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-11-28 12:29:10,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-11-28 12:29:10,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4564, Invalid=4942, Unknown=0, NotChecked=0, Total=9506 [2018-11-28 12:29:10,003 INFO L87 Difference]: Start difference. First operand 298 states and 395 transitions. Second operand 98 states. [2018-11-28 12:29:13,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:29:13,403 INFO L93 Difference]: Finished difference Result 305 states and 403 transitions. [2018-11-28 12:29:13,403 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-11-28 12:29:13,403 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 664 [2018-11-28 12:29:13,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:29:13,405 INFO L225 Difference]: With dead ends: 305 [2018-11-28 12:29:13,405 INFO L226 Difference]: Without dead ends: 301 [2018-11-28 12:29:13,406 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 948 GetRequests, 758 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4464 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=13682, Invalid=22990, Unknown=0, NotChecked=0, Total=36672 [2018-11-28 12:29:13,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2018-11-28 12:29:13,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 301. [2018-11-28 12:29:13,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2018-11-28 12:29:13,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 399 transitions. [2018-11-28 12:29:13,486 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 399 transitions. Word has length 664 [2018-11-28 12:29:13,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:29:13,486 INFO L480 AbstractCegarLoop]: Abstraction has 301 states and 399 transitions. [2018-11-28 12:29:13,486 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-11-28 12:29:13,486 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 399 transitions. [2018-11-28 12:29:13,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 672 [2018-11-28 12:29:13,490 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:29:13,490 INFO L402 BasicCegarLoop]: trace histogram [95, 95, 94, 94, 94, 94, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:29:13,490 INFO L423 AbstractCegarLoop]: === Iteration 95 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:29:13,490 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:29:13,491 INFO L82 PathProgramCache]: Analyzing trace with hash -1771429529, now seen corresponding path program 94 times [2018-11-28 12:29:13,491 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:29:13,491 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:29:13,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:29:13,491 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:29:13,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:29:13,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:29:15,808 INFO L134 CoverageAnalysis]: Checked inductivity of 30973 backedges. 0 proven. 13301 refuted. 0 times theorem prover too weak. 17672 trivial. 0 not checked. [2018-11-28 12:29:15,808 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:29:15,809 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/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 [2018-11-28 12:29:15,815 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 12:29:15,936 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 12:29:15,936 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:29:15,950 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:29:16,138 INFO L134 CoverageAnalysis]: Checked inductivity of 30973 backedges. 0 proven. 13301 refuted. 0 times theorem prover too weak. 17672 trivial. 0 not checked. [2018-11-28 12:29:16,153 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:29:16,153 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2018-11-28 12:29:16,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-11-28 12:29:16,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-11-28 12:29:16,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4660, Invalid=5042, Unknown=0, NotChecked=0, Total=9702 [2018-11-28 12:29:16,154 INFO L87 Difference]: Start difference. First operand 301 states and 399 transitions. Second operand 99 states. [2018-11-28 12:29:19,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:29:19,567 INFO L93 Difference]: Finished difference Result 308 states and 407 transitions. [2018-11-28 12:29:19,567 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-11-28 12:29:19,568 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 671 [2018-11-28 12:29:19,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:29:19,569 INFO L225 Difference]: With dead ends: 308 [2018-11-28 12:29:19,569 INFO L226 Difference]: Without dead ends: 304 [2018-11-28 12:29:19,571 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 958 GetRequests, 766 SyntacticMatches, 0 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4559 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=13970, Invalid=23472, Unknown=0, NotChecked=0, Total=37442 [2018-11-28 12:29:19,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2018-11-28 12:29:19,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 304. [2018-11-28 12:29:19,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2018-11-28 12:29:19,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 403 transitions. [2018-11-28 12:29:19,657 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 403 transitions. Word has length 671 [2018-11-28 12:29:19,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:29:19,657 INFO L480 AbstractCegarLoop]: Abstraction has 304 states and 403 transitions. [2018-11-28 12:29:19,657 INFO L481 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-11-28 12:29:19,657 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 403 transitions. [2018-11-28 12:29:19,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 679 [2018-11-28 12:29:19,661 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:29:19,661 INFO L402 BasicCegarLoop]: trace histogram [96, 96, 95, 95, 95, 95, 95, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:29:19,661 INFO L423 AbstractCegarLoop]: === Iteration 96 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:29:19,662 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:29:19,662 INFO L82 PathProgramCache]: Analyzing trace with hash 1496238754, now seen corresponding path program 95 times [2018-11-28 12:29:19,662 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:29:19,662 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:29:19,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:29:19,662 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:29:19,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:29:19,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:29:22,083 INFO L134 CoverageAnalysis]: Checked inductivity of 31635 backedges. 0 proven. 13585 refuted. 0 times theorem prover too weak. 18050 trivial. 0 not checked. [2018-11-28 12:29:22,083 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:29:22,083 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/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 [2018-11-28 12:29:22,091 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-28 12:29:22,589 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 96 check-sat command(s) [2018-11-28 12:29:22,589 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:29:22,611 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:29:22,807 INFO L134 CoverageAnalysis]: Checked inductivity of 31635 backedges. 0 proven. 13585 refuted. 0 times theorem prover too weak. 18050 trivial. 0 not checked. [2018-11-28 12:29:22,823 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:29:22,824 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 100 [2018-11-28 12:29:22,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-11-28 12:29:22,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-11-28 12:29:22,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4757, Invalid=5143, Unknown=0, NotChecked=0, Total=9900 [2018-11-28 12:29:22,825 INFO L87 Difference]: Start difference. First operand 304 states and 403 transitions. Second operand 100 states. [2018-11-28 12:29:26,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:29:26,480 INFO L93 Difference]: Finished difference Result 311 states and 411 transitions. [2018-11-28 12:29:26,480 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-11-28 12:29:26,480 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 678 [2018-11-28 12:29:26,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:29:26,482 INFO L225 Difference]: With dead ends: 311 [2018-11-28 12:29:26,482 INFO L226 Difference]: Without dead ends: 307 [2018-11-28 12:29:26,484 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 [2018-11-28 12:29:26,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2018-11-28 12:29:26,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 307. [2018-11-28 12:29:26,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 307 states. [2018-11-28 12:29:26,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 407 transitions. [2018-11-28 12:29:26,575 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 407 transitions. Word has length 678 [2018-11-28 12:29:26,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:29:26,576 INFO L480 AbstractCegarLoop]: Abstraction has 307 states and 407 transitions. [2018-11-28 12:29:26,576 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-11-28 12:29:26,576 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 407 transitions. [2018-11-28 12:29:26,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 686 [2018-11-28 12:29:26,580 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:29:26,580 INFO L402 BasicCegarLoop]: trace histogram [97, 97, 96, 96, 96, 96, 96, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:29:26,580 INFO L423 AbstractCegarLoop]: === Iteration 97 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:29:26,580 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:29:26,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1517270147, now seen corresponding path program 96 times [2018-11-28 12:29:26,581 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:29:26,581 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:29:26,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:29:26,581 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:29:26,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:29:26,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:29:28,974 INFO L134 CoverageAnalysis]: Checked inductivity of 32304 backedges. 0 proven. 13872 refuted. 0 times theorem prover too weak. 18432 trivial. 0 not checked. [2018-11-28 12:29:28,974 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:29:28,974 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/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 [2018-11-28 12:29:28,982 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-28 12:29:29,374 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 97 check-sat command(s) [2018-11-28 12:29:29,374 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:29:29,386 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:29:29,595 INFO L134 CoverageAnalysis]: Checked inductivity of 32304 backedges. 0 proven. 13872 refuted. 0 times theorem prover too weak. 18432 trivial. 0 not checked. [2018-11-28 12:29:29,611 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:29:29,611 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 101 [2018-11-28 12:29:29,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-11-28 12:29:29,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-11-28 12:29:29,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4855, Invalid=5245, Unknown=0, NotChecked=0, Total=10100 [2018-11-28 12:29:29,613 INFO L87 Difference]: Start difference. First operand 307 states and 407 transitions. Second operand 101 states. [2018-11-28 12:29:33,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:29:33,292 INFO L93 Difference]: Finished difference Result 314 states and 415 transitions. [2018-11-28 12:29:33,292 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-11-28 12:29:33,292 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 685 [2018-11-28 12:29:33,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:29:33,294 INFO L225 Difference]: With dead ends: 314 [2018-11-28 12:29:33,294 INFO L226 Difference]: Without dead ends: 310 [2018-11-28 12:29:33,296 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 [2018-11-28 12:29:33,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2018-11-28 12:29:33,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 310. [2018-11-28 12:29:33,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 310 states. [2018-11-28 12:29:33,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 411 transitions. [2018-11-28 12:29:33,390 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 411 transitions. Word has length 685 [2018-11-28 12:29:33,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:29:33,390 INFO L480 AbstractCegarLoop]: Abstraction has 310 states and 411 transitions. [2018-11-28 12:29:33,390 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-11-28 12:29:33,390 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 411 transitions. [2018-11-28 12:29:33,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 693 [2018-11-28 12:29:33,394 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:29:33,394 INFO L402 BasicCegarLoop]: trace histogram [98, 98, 97, 97, 97, 97, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:29:33,394 INFO L423 AbstractCegarLoop]: === Iteration 98 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:29:33,395 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:29:33,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1815584780, now seen corresponding path program 97 times [2018-11-28 12:29:33,395 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:29:33,395 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:29:33,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:29:33,396 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:29:33,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:29:33,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:29:35,851 INFO L134 CoverageAnalysis]: Checked inductivity of 32980 backedges. 0 proven. 14162 refuted. 0 times theorem prover too weak. 18818 trivial. 0 not checked. [2018-11-28 12:29:35,851 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:29:35,851 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/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 [2018-11-28 12:29:35,868 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:29:35,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:29:36,003 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:29:36,205 INFO L134 CoverageAnalysis]: Checked inductivity of 32980 backedges. 0 proven. 14162 refuted. 0 times theorem prover too weak. 18818 trivial. 0 not checked. [2018-11-28 12:29:36,220 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:29:36,221 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 102 [2018-11-28 12:29:36,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-11-28 12:29:36,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-11-28 12:29:36,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4954, Invalid=5348, Unknown=0, NotChecked=0, Total=10302 [2018-11-28 12:29:36,222 INFO L87 Difference]: Start difference. First operand 310 states and 411 transitions. Second operand 102 states. [2018-11-28 12:29:39,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:29:39,939 INFO L93 Difference]: Finished difference Result 317 states and 419 transitions. [2018-11-28 12:29:39,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-11-28 12:29:39,939 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 692 [2018-11-28 12:29:39,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:29:39,940 INFO L225 Difference]: With dead ends: 317 [2018-11-28 12:29:39,940 INFO L226 Difference]: Without dead ends: 313 [2018-11-28 12:29:39,941 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 988 GetRequests, 790 SyntacticMatches, 0 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4850 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=14852, Invalid=24948, Unknown=0, NotChecked=0, Total=39800 [2018-11-28 12:29:39,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2018-11-28 12:29:40,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 313. [2018-11-28 12:29:40,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 313 states. [2018-11-28 12:29:40,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 415 transitions. [2018-11-28 12:29:40,037 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 415 transitions. Word has length 692 [2018-11-28 12:29:40,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:29:40,038 INFO L480 AbstractCegarLoop]: Abstraction has 313 states and 415 transitions. [2018-11-28 12:29:40,038 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-11-28 12:29:40,038 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 415 transitions. [2018-11-28 12:29:40,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 700 [2018-11-28 12:29:40,040 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:29:40,040 INFO L402 BasicCegarLoop]: trace histogram [99, 99, 98, 98, 98, 98, 98, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:29:40,040 INFO L423 AbstractCegarLoop]: === Iteration 99 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:29:40,040 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:29:40,041 INFO L82 PathProgramCache]: Analyzing trace with hash -546005357, now seen corresponding path program 98 times [2018-11-28 12:29:40,041 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:29:40,041 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:29:40,041 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:29:40,041 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:29:40,041 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:29:40,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:29:42,662 INFO L134 CoverageAnalysis]: Checked inductivity of 33663 backedges. 0 proven. 14455 refuted. 0 times theorem prover too weak. 19208 trivial. 0 not checked. [2018-11-28 12:29:42,662 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:29:42,662 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/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 [2018-11-28 12:29:42,671 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 12:29:42,785 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 12:29:42,786 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:29:42,795 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:29:43,021 INFO L134 CoverageAnalysis]: Checked inductivity of 33663 backedges. 0 proven. 14455 refuted. 0 times theorem prover too weak. 19208 trivial. 0 not checked. [2018-11-28 12:29:43,036 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:29:43,036 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 103 [2018-11-28 12:29:43,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-11-28 12:29:43,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-11-28 12:29:43,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5054, Invalid=5452, Unknown=0, NotChecked=0, Total=10506 [2018-11-28 12:29:43,037 INFO L87 Difference]: Start difference. First operand 313 states and 415 transitions. Second operand 103 states. [2018-11-28 12:29:46,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:29:46,890 INFO L93 Difference]: Finished difference Result 320 states and 423 transitions. [2018-11-28 12:29:46,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-11-28 12:29:46,890 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 699 [2018-11-28 12:29:46,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:29:46,891 INFO L225 Difference]: With dead ends: 320 [2018-11-28 12:29:46,891 INFO L226 Difference]: Without dead ends: 316 [2018-11-28 12:29:46,893 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 998 GetRequests, 798 SyntacticMatches, 0 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4949 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=15152, Invalid=25450, Unknown=0, NotChecked=0, Total=40602 [2018-11-28 12:29:46,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2018-11-28 12:29:46,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 316. [2018-11-28 12:29:46,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 316 states. [2018-11-28 12:29:46,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 419 transitions. [2018-11-28 12:29:46,993 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 419 transitions. Word has length 699 [2018-11-28 12:29:46,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:29:46,993 INFO L480 AbstractCegarLoop]: Abstraction has 316 states and 419 transitions. [2018-11-28 12:29:46,993 INFO L481 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-11-28 12:29:46,993 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 419 transitions. [2018-11-28 12:29:46,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 707 [2018-11-28 12:29:46,996 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:29:46,996 INFO L402 BasicCegarLoop]: trace histogram [100, 100, 99, 99, 99, 99, 99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:29:46,996 INFO L423 AbstractCegarLoop]: === Iteration 100 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:29:46,996 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:29:46,996 INFO L82 PathProgramCache]: Analyzing trace with hash 296090742, now seen corresponding path program 99 times [2018-11-28 12:29:46,996 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:29:46,996 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:29:46,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:29:46,997 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:29:46,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:29:47,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:29:49,571 INFO L134 CoverageAnalysis]: Checked inductivity of 34353 backedges. 0 proven. 14751 refuted. 0 times theorem prover too weak. 19602 trivial. 0 not checked. [2018-11-28 12:29:49,571 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:29:49,571 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/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 [2018-11-28 12:29:49,581 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 12:29:50,087 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 100 check-sat command(s) [2018-11-28 12:29:50,087 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:29:50,102 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:29:50,326 INFO L134 CoverageAnalysis]: Checked inductivity of 34353 backedges. 0 proven. 14751 refuted. 0 times theorem prover too weak. 19602 trivial. 0 not checked. [2018-11-28 12:29:50,342 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:29:50,342 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 104 [2018-11-28 12:29:50,343 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-11-28 12:29:50,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-11-28 12:29:50,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5155, Invalid=5557, Unknown=0, NotChecked=0, Total=10712 [2018-11-28 12:29:50,344 INFO L87 Difference]: Start difference. First operand 316 states and 419 transitions. Second operand 104 states. [2018-11-28 12:29:54,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:29:54,201 INFO L93 Difference]: Finished difference Result 323 states and 427 transitions. [2018-11-28 12:29:54,201 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-11-28 12:29:54,201 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 706 [2018-11-28 12:29:54,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:29:54,202 INFO L225 Difference]: With dead ends: 323 [2018-11-28 12:29:54,202 INFO L226 Difference]: Without dead ends: 319 [2018-11-28 12:29:54,203 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1008 GetRequests, 806 SyntacticMatches, 0 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5049 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=15455, Invalid=25957, Unknown=0, NotChecked=0, Total=41412 [2018-11-28 12:29:54,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2018-11-28 12:29:54,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 319. [2018-11-28 12:29:54,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2018-11-28 12:29:54,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 423 transitions. [2018-11-28 12:29:54,301 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 423 transitions. Word has length 706 [2018-11-28 12:29:54,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:29:54,301 INFO L480 AbstractCegarLoop]: Abstraction has 319 states and 423 transitions. [2018-11-28 12:29:54,301 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-11-28 12:29:54,301 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 423 transitions. [2018-11-28 12:29:54,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 714 [2018-11-28 12:29:54,304 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:29:54,304 INFO L402 BasicCegarLoop]: trace histogram [101, 101, 100, 100, 100, 100, 100, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:29:54,305 INFO L423 AbstractCegarLoop]: === Iteration 101 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:29:54,305 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:29:54,305 INFO L82 PathProgramCache]: Analyzing trace with hash 418888361, now seen corresponding path program 100 times [2018-11-28 12:29:54,305 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:29:54,305 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:29:54,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:29:54,305 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:29:54,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:29:54,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:30:02,580 INFO L134 CoverageAnalysis]: Checked inductivity of 35050 backedges. 15050 proven. 0 refuted. 0 times theorem prover too weak. 20000 trivial. 0 not checked. [2018-11-28 12:30:02,581 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 12:30:02,581 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [206] imperfect sequences [] total 206 [2018-11-28 12:30:02,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 206 states [2018-11-28 12:30:02,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 206 interpolants. [2018-11-28 12:30:02,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10409, Invalid=31821, Unknown=0, NotChecked=0, Total=42230 [2018-11-28 12:30:02,583 INFO L87 Difference]: Start difference. First operand 319 states and 423 transitions. Second operand 206 states. [2018-11-28 12:30:07,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:30:07,445 INFO L93 Difference]: Finished difference Result 625 states and 830 transitions. [2018-11-28 12:30:07,448 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 206 states. [2018-11-28 12:30:07,448 INFO L78 Accepts]: Start accepts. Automaton has 206 states. Word has length 713 [2018-11-28 12:30:07,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:30:07,451 INFO L225 Difference]: With dead ends: 625 [2018-11-28 12:30:07,451 INFO L226 Difference]: Without dead ends: 621 [2018-11-28 12:30:07,457 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 405 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50198 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=31213, Invalid=134029, Unknown=0, NotChecked=0, Total=165242 [2018-11-28 12:30:07,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2018-11-28 12:30:07,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 322. [2018-11-28 12:30:07,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 322 states. [2018-11-28 12:30:07,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 427 transitions. [2018-11-28 12:30:07,890 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 427 transitions. Word has length 713 [2018-11-28 12:30:07,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:30:07,891 INFO L480 AbstractCegarLoop]: Abstraction has 322 states and 427 transitions. [2018-11-28 12:30:07,891 INFO L481 AbstractCegarLoop]: Interpolant automaton has 206 states. [2018-11-28 12:30:07,891 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 427 transitions. [2018-11-28 12:30:07,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 716 [2018-11-28 12:30:07,895 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:30:07,895 INFO L402 BasicCegarLoop]: trace histogram [101, 101, 101, 100, 100, 100, 100, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:30:07,895 INFO L423 AbstractCegarLoop]: === Iteration 102 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:30:07,895 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:30:07,895 INFO L82 PathProgramCache]: Analyzing trace with hash 1512877282, now seen corresponding path program 1 times [2018-11-28 12:30:07,896 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:30:07,896 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:30:07,896 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:30:07,896 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:30:07,896 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:30:07,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:30:08,082 INFO L134 CoverageAnalysis]: Checked inductivity of 35150 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 35050 trivial. 0 not checked. [2018-11-28 12:30:08,082 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 12:30:08,082 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-28 12:30:08,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-28 12:30:08,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-28 12:30:08,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-28 12:30:08,082 INFO L87 Difference]: Start difference. First operand 322 states and 427 transitions. Second operand 4 states. [2018-11-28 12:30:08,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:30:08,094 INFO L93 Difference]: Finished difference Result 631 states and 838 transitions. [2018-11-28 12:30:08,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-28 12:30:08,095 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 715 [2018-11-28 12:30:08,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:30:08,096 INFO L225 Difference]: With dead ends: 631 [2018-11-28 12:30:08,096 INFO L226 Difference]: Without dead ends: 324 [2018-11-28 12:30:08,096 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 [2018-11-28 12:30:08,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2018-11-28 12:30:08,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 322. [2018-11-28 12:30:08,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 322 states. [2018-11-28 12:30:08,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 426 transitions. [2018-11-28 12:30:08,201 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 426 transitions. Word has length 715 [2018-11-28 12:30:08,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:30:08,201 INFO L480 AbstractCegarLoop]: Abstraction has 322 states and 426 transitions. [2018-11-28 12:30:08,201 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-28 12:30:08,201 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 426 transitions. [2018-11-28 12:30:08,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 722 [2018-11-28 12:30:08,205 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:30:08,205 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] [2018-11-28 12:30:08,205 INFO L423 AbstractCegarLoop]: === Iteration 103 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:30:08,205 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:30:08,206 INFO L82 PathProgramCache]: Analyzing trace with hash 956489533, now seen corresponding path program 1 times [2018-11-28 12:30:08,206 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:30:08,206 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:30:08,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:30:08,206 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:30:08,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:30:08,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:30:08,410 INFO L134 CoverageAnalysis]: Checked inductivity of 35554 backedges. 701 proven. 1 refuted. 0 times theorem prover too weak. 34852 trivial. 0 not checked. [2018-11-28 12:30:08,410 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:30:08,410 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/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 [2018-11-28 12:30:08,418 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:30:08,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:30:08,532 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:30:08,664 INFO L134 CoverageAnalysis]: Checked inductivity of 35554 backedges. 701 proven. 1 refuted. 0 times theorem prover too weak. 34852 trivial. 0 not checked. [2018-11-28 12:30:08,679 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:30:08,680 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 7 [2018-11-28 12:30:08,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-28 12:30:08,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-28 12:30:08,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-11-28 12:30:08,680 INFO L87 Difference]: Start difference. First operand 322 states and 426 transitions. Second operand 7 states. [2018-11-28 12:30:08,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:30:08,712 INFO L93 Difference]: Finished difference Result 327 states and 433 transitions. [2018-11-28 12:30:08,712 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-28 12:30:08,712 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 721 [2018-11-28 12:30:08,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:30:08,712 INFO L225 Difference]: With dead ends: 327 [2018-11-28 12:30:08,713 INFO L226 Difference]: Without dead ends: 0 [2018-11-28 12:30:08,714 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 [2018-11-28 12:30:08,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-28 12:30:08,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-28 12:30:08,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-28 12:30:08,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-28 12:30:08,714 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 721 [2018-11-28 12:30:08,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:30:08,714 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-28 12:30:08,714 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-28 12:30:08,715 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-28 12:30:08,715 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-28 12:30:08,718 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-28 12:30:08,786 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-28 12:30:08,786 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-28 12:30:08,786 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-28 12:30:08,786 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-28 12:30:08,786 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-28 12:30:08,786 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-28 12:30:08,786 INFO L448 ceAbstractionStarter]: For program point L33(line 33) no Hoare annotation was computed. [2018-11-28 12:30:08,786 INFO L448 ceAbstractionStarter]: For program point L30(lines 30 34) no Hoare annotation was computed. [2018-11-28 12:30:08,786 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 26 35) the Hoare annotation is: true [2018-11-28 12:30:08,786 INFO L451 ceAbstractionStarter]: At program point L29(line 29) the Hoare annotation is: true [2018-11-28 12:30:08,786 INFO L448 ceAbstractionStarter]: For program point mainFINAL(lines 26 35) no Hoare annotation was computed. [2018-11-28 12:30:08,786 INFO L448 ceAbstractionStarter]: For program point L29-1(line 29) no Hoare annotation was computed. [2018-11-28 12:30:08,786 INFO L448 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 33) no Hoare annotation was computed. [2018-11-28 12:30:08,786 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 26 35) no Hoare annotation was computed. [2018-11-28 12:30:08,786 INFO L448 ceAbstractionStarter]: For program point additionFINAL(lines 13 23) no Hoare annotation was computed. [2018-11-28 12:30:08,786 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)) [2018-11-28 12:30:08,787 INFO L448 ceAbstractionStarter]: For program point L20(lines 20 22) no Hoare annotation was computed. [2018-11-28 12:30:08,787 INFO L448 ceAbstractionStarter]: For program point L21-1(line 21) no Hoare annotation was computed. [2018-11-28 12:30:08,787 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)) [2018-11-28 12:30:08,787 INFO L448 ceAbstractionStarter]: For program point L17(lines 17 19) no Hoare annotation was computed. [2018-11-28 12:30:08,787 INFO L448 ceAbstractionStarter]: For program point L18-1(line 18) no Hoare annotation was computed. [2018-11-28 12:30:08,787 INFO L451 ceAbstractionStarter]: At program point additionENTRY(lines 13 23) the Hoare annotation is: true [2018-11-28 12:30:08,787 INFO L448 ceAbstractionStarter]: For program point L14(lines 14 16) no Hoare annotation was computed. [2018-11-28 12:30:08,787 INFO L448 ceAbstractionStarter]: For program point additionEXIT(lines 13 23) no Hoare annotation was computed. [2018-11-28 12:30:08,789 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 12:30:08 BoogieIcfgContainer [2018-11-28 12:30:08,789 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-28 12:30:08,789 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-28 12:30:08,789 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-28 12:30:08,789 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-28 12:30:08,789 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 12:25:39" (3/4) ... [2018-11-28 12:30:08,792 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-28 12:30:08,796 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-28 12:30:08,796 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-28 12:30:08,797 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure addition [2018-11-28 12:30:08,800 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-11-28 12:30:08,800 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2018-11-28 12:30:08,800 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-28 12:30:08,828 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_0480de17-b901-4be8-aa4b-f0aa0720d748/bin-2019/uautomizer/witness.graphml [2018-11-28 12:30:08,829 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-28 12:30:08,829 INFO L168 Benchmark]: Toolchain (without parser) took 269834.43 ms. Allocated memory was 1.0 GB in the beginning and 1.8 GB in the end (delta: 777.0 MB). Free memory was 953.3 MB in the beginning and 1.4 GB in the end (delta: -416.7 MB). Peak memory consumption was 360.3 MB. Max. memory is 11.5 GB. [2018-11-28 12:30:08,830 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 979.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 12:30:08,831 INFO L168 Benchmark]: CACSL2BoogieTranslator took 136.68 ms. Allocated memory is still 1.0 GB. Free memory was 953.3 MB in the beginning and 942.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-28 12:30:08,831 INFO L168 Benchmark]: Boogie Procedure Inliner took 12.66 ms. Allocated memory is still 1.0 GB. Free memory is still 942.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 12:30:08,831 INFO L168 Benchmark]: Boogie Preprocessor took 10.80 ms. Allocated memory is still 1.0 GB. Free memory is still 942.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 12:30:08,831 INFO L168 Benchmark]: RCFGBuilder took 177.50 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 123.2 MB). Free memory was 939.9 MB in the beginning and 1.1 GB in the end (delta: -168.7 MB). Peak memory consumption was 12.7 MB. Max. memory is 11.5 GB. [2018-11-28 12:30:08,831 INFO L168 Benchmark]: TraceAbstraction took 269453.62 ms. Allocated memory was 1.2 GB in the beginning and 1.8 GB in the end (delta: 653.8 MB). Free memory was 1.1 GB in the beginning and 1.4 GB in the end (delta: -261.4 MB). Peak memory consumption was 392.3 MB. Max. memory is 11.5 GB. [2018-11-28 12:30:08,832 INFO L168 Benchmark]: Witness Printer took 39.58 ms. Allocated memory is still 1.8 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 2.1 kB). Peak memory consumption was 2.1 kB. Max. memory is 11.5 GB. [2018-11-28 12:30:08,833 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 979.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 136.68 ms. Allocated memory is still 1.0 GB. Free memory was 953.3 MB in the beginning and 942.6 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 12.66 ms. Allocated memory is still 1.0 GB. Free memory is still 942.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 10.80 ms. Allocated memory is still 1.0 GB. Free memory is still 942.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 177.50 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 123.2 MB). Free memory was 939.9 MB in the beginning and 1.1 GB in the end (delta: -168.7 MB). Peak memory consumption was 12.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 269453.62 ms. Allocated memory was 1.2 GB in the beginning and 1.8 GB in the end (delta: 653.8 MB). Free memory was 1.1 GB in the beginning and 1.4 GB in the end (delta: -261.4 MB). Peak memory consumption was 392.3 MB. Max. memory is 11.5 GB. * Witness Printer took 39.58 ms. Allocated memory is still 1.8 GB. Free memory was 1.4 GB in the beginning and 1.4 GB 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, 269.4s OverallTime, 103 OverallIterations, 102 TraceHistogramMax, 138.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1661 SDtfs, 11307 SDslu, 35346 SDs, 0 SdLazy, 30234 SolverSat, 16842 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 16.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 52528 GetRequests, 41814 SyntacticMatches, 1 SemanticMatches, 10713 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221800 ImplicationChecksByTransitivity, 187.0s 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: 3.5s 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: 1.3s SsaConstructionTime, 14.2s SatisfiabilityAnalysisTime, 101.6s 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...