./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/sum_25x0_true-unreach-call_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0cd3be1d Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_47ded97e-e7c0-42ad-8e41-52886ebe22ed/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_47ded97e-e7c0-42ad-8e41-52886ebe22ed/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_47ded97e-e7c0-42ad-8e41-52886ebe22ed/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_47ded97e-e7c0-42ad-8e41-52886ebe22ed/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/sum_25x0_true-unreach-call_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_47ded97e-e7c0-42ad-8e41-52886ebe22ed/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_47ded97e-e7c0-42ad-8e41-52886ebe22ed/bin-2019/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4039dcb878ce4fadab8efdd435e8ec3d803b5cc8 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-0cd3be1 [2018-11-28 12:46:47,098 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-28 12:46:47,099 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-28 12:46:47,106 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-28 12:46:47,107 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-28 12:46:47,107 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-28 12:46:47,108 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-28 12:46:47,109 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-28 12:46:47,110 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-28 12:46:47,111 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-28 12:46:47,111 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-28 12:46:47,111 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-28 12:46:47,112 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-28 12:46:47,113 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-28 12:46:47,114 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-28 12:46:47,114 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-28 12:46:47,115 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-28 12:46:47,116 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-28 12:46:47,117 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-28 12:46:47,119 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-28 12:46:47,120 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-28 12:46:47,121 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-28 12:46:47,123 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-28 12:46:47,123 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-28 12:46:47,123 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-28 12:46:47,124 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-28 12:46:47,124 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-28 12:46:47,125 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-28 12:46:47,125 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-28 12:46:47,127 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-28 12:46:47,127 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-28 12:46:47,128 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-28 12:46:47,128 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-28 12:46:47,128 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-28 12:46:47,129 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-28 12:46:47,130 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-28 12:46:47,130 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_47ded97e-e7c0-42ad-8e41-52886ebe22ed/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-11-28 12:46:47,140 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-28 12:46:47,140 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-28 12:46:47,141 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-28 12:46:47,141 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-11-28 12:46:47,141 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-28 12:46:47,142 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-28 12:46:47,142 INFO L133 SettingsManager]: * Use SBE=true [2018-11-28 12:46:47,142 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-28 12:46:47,142 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-28 12:46:47,143 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-28 12:46:47,143 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-28 12:46:47,143 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-28 12:46:47,144 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-28 12:46:47,144 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-28 12:46:47,144 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-28 12:46:47,144 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-28 12:46:47,144 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-28 12:46:47,144 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-28 12:46:47,144 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-28 12:46:47,145 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-28 12:46:47,145 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-28 12:46:47,145 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-28 12:46:47,145 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-28 12:46:47,145 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-28 12:46:47,145 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-28 12:46:47,146 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-28 12:46:47,146 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-28 12:46:47,146 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-28 12:46:47,146 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-28 12:46:47,146 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-28 12:46:47,148 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_47ded97e-e7c0-42ad-8e41-52886ebe22ed/bin-2019/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4039dcb878ce4fadab8efdd435e8ec3d803b5cc8 [2018-11-28 12:46:47,174 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-28 12:46:47,183 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-28 12:46:47,185 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-28 12:46:47,187 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-28 12:46:47,187 INFO L276 PluginConnector]: CDTParser initialized [2018-11-28 12:46:47,187 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_47ded97e-e7c0-42ad-8e41-52886ebe22ed/bin-2019/uautomizer/../../sv-benchmarks/c/recursive-simple/sum_25x0_true-unreach-call_true-termination.c [2018-11-28 12:46:47,227 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_47ded97e-e7c0-42ad-8e41-52886ebe22ed/bin-2019/uautomizer/data/73a4163af/18d4c6f6a6cd46a6a2e55f9d0dd84acc/FLAGf0aba80a6 [2018-11-28 12:46:47,652 INFO L307 CDTParser]: Found 1 translation units. [2018-11-28 12:46:47,652 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_47ded97e-e7c0-42ad-8e41-52886ebe22ed/sv-benchmarks/c/recursive-simple/sum_25x0_true-unreach-call_true-termination.c [2018-11-28 12:46:47,657 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_47ded97e-e7c0-42ad-8e41-52886ebe22ed/bin-2019/uautomizer/data/73a4163af/18d4c6f6a6cd46a6a2e55f9d0dd84acc/FLAGf0aba80a6 [2018-11-28 12:46:47,669 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_47ded97e-e7c0-42ad-8e41-52886ebe22ed/bin-2019/uautomizer/data/73a4163af/18d4c6f6a6cd46a6a2e55f9d0dd84acc [2018-11-28 12:46:47,671 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-28 12:46:47,672 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-28 12:46:47,673 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-28 12:46:47,673 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-28 12:46:47,676 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-28 12:46:47,677 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 12:46:47" (1/1) ... [2018-11-28 12:46:47,680 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75f7ed53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:46:47, skipping insertion in model container [2018-11-28 12:46:47,680 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 12:46:47" (1/1) ... [2018-11-28 12:46:47,686 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-28 12:46:47,699 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-28 12:46:47,819 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 12:46:47,822 INFO L191 MainTranslator]: Completed pre-run [2018-11-28 12:46:47,832 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 12:46:47,840 INFO L195 MainTranslator]: Completed translation [2018-11-28 12:46:47,841 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:46:47 WrapperNode [2018-11-28 12:46:47,841 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-28 12:46:47,841 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-28 12:46:47,841 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-28 12:46:47,842 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-28 12:46:47,848 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:46:47" (1/1) ... [2018-11-28 12:46:47,853 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:46:47" (1/1) ... [2018-11-28 12:46:47,857 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-28 12:46:47,858 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-28 12:46:47,858 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-28 12:46:47,858 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-28 12:46:47,863 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:46:47" (1/1) ... [2018-11-28 12:46:47,864 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:46:47" (1/1) ... [2018-11-28 12:46:47,864 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:46:47" (1/1) ... [2018-11-28 12:46:47,864 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:46:47" (1/1) ... [2018-11-28 12:46:47,867 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:46:47" (1/1) ... [2018-11-28 12:46:47,868 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:46:47" (1/1) ... [2018-11-28 12:46:47,869 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:46:47" (1/1) ... [2018-11-28 12:46:47,869 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-28 12:46:47,870 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-28 12:46:47,870 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-28 12:46:47,870 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-28 12:46:47,871 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:46:47" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_47ded97e-e7c0-42ad-8e41-52886ebe22ed/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 12:46:47,947 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-28 12:46:47,947 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-28 12:46:47,947 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-28 12:46:47,947 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-28 12:46:47,948 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2018-11-28 12:46:47,948 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2018-11-28 12:46:47,948 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-28 12:46:47,948 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-28 12:46:48,036 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-28 12:46:48,036 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-11-28 12:46:48,037 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 12:46:48 BoogieIcfgContainer [2018-11-28 12:46:48,037 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-28 12:46:48,037 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-28 12:46:48,037 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-28 12:46:48,039 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-28 12:46:48,039 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 12:46:47" (1/3) ... [2018-11-28 12:46:48,040 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@207d53ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 12:46:48, skipping insertion in model container [2018-11-28 12:46:48,040 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:46:47" (2/3) ... [2018-11-28 12:46:48,040 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@207d53ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 12:46:48, skipping insertion in model container [2018-11-28 12:46:48,040 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 12:46:48" (3/3) ... [2018-11-28 12:46:48,041 INFO L112 eAbstractionObserver]: Analyzing ICFG sum_25x0_true-unreach-call_true-termination.c [2018-11-28 12:46:48,047 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-28 12:46:48,051 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-28 12:46:48,061 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-28 12:46:48,085 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-28 12:46:48,086 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-28 12:46:48,086 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-28 12:46:48,086 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-28 12:46:48,086 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-28 12:46:48,086 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-28 12:46:48,086 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-28 12:46:48,086 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-28 12:46:48,086 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-28 12:46:48,100 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2018-11-28 12:46:48,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-28 12:46:48,105 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:46:48,106 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:46:48,107 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:46:48,111 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:46:48,112 INFO L82 PathProgramCache]: Analyzing trace with hash 2001781660, now seen corresponding path program 1 times [2018-11-28 12:46:48,113 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:46:48,113 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:46:48,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:46:48,141 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:46:48,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:46:48,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:46:48,224 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 12:46:48,226 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 12:46:48,226 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-28 12:46:48,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-28 12:46:48,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-28 12:46:48,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-28 12:46:48,243 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2018-11-28 12:46:48,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:46:48,299 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2018-11-28 12:46:48,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-28 12:46:48,301 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-11-28 12:46:48,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:46:48,309 INFO L225 Difference]: With dead ends: 30 [2018-11-28 12:46:48,309 INFO L226 Difference]: Without dead ends: 18 [2018-11-28 12:46:48,311 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 12:46:48,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-11-28 12:46:48,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-11-28 12:46:48,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-11-28 12:46:48,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2018-11-28 12:46:48,340 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2018-11-28 12:46:48,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:46:48,341 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2018-11-28 12:46:48,341 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-28 12:46:48,341 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2018-11-28 12:46:48,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-11-28 12:46:48,342 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:46:48,342 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:46:48,343 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:46:48,343 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:46:48,343 INFO L82 PathProgramCache]: Analyzing trace with hash -118151420, now seen corresponding path program 1 times [2018-11-28 12:46:48,343 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:46:48,343 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:46:48,344 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:46:48,344 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:46:48,344 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:46:48,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:46:48,402 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 12:46:48,402 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:46:48,402 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_47ded97e-e7c0-42ad-8e41-52886ebe22ed/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 12:46:48,410 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:46:48,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:46:48,431 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:46:48,451 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 12:46:48,466 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:46:48,466 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-11-28 12:46:48,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-28 12:46:48,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-28 12:46:48,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-11-28 12:46:48,467 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2018-11-28 12:46:48,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:46:48,567 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-11-28 12:46:48,567 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-28 12:46:48,568 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2018-11-28 12:46:48,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:46:48,568 INFO L225 Difference]: With dead ends: 25 [2018-11-28 12:46:48,568 INFO L226 Difference]: Without dead ends: 21 [2018-11-28 12:46:48,569 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-11-28 12:46:48,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-11-28 12:46:48,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-11-28 12:46:48,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-11-28 12:46:48,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-11-28 12:46:48,574 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2018-11-28 12:46:48,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:46:48,574 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-11-28 12:46:48,574 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-28 12:46:48,574 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-11-28 12:46:48,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-11-28 12:46:48,575 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:46:48,575 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:46:48,575 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:46:48,575 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:46:48,576 INFO L82 PathProgramCache]: Analyzing trace with hash 764931548, now seen corresponding path program 2 times [2018-11-28 12:46:48,576 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:46:48,576 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:46:48,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:46:48,577 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:46:48,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:46:48,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:46:48,640 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-28 12:46:48,640 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:46:48,641 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_47ded97e-e7c0-42ad-8e41-52886ebe22ed/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 12:46:48,652 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 12:46:48,665 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 12:46:48,665 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:46:48,666 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:46:48,678 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-28 12:46:48,701 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:46:48,701 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-11-28 12:46:48,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-28 12:46:48,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-28 12:46:48,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-11-28 12:46:48,702 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 7 states. [2018-11-28 12:46:48,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:46:48,750 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2018-11-28 12:46:48,751 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-28 12:46:48,751 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2018-11-28 12:46:48,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:46:48,752 INFO L225 Difference]: With dead ends: 28 [2018-11-28 12:46:48,752 INFO L226 Difference]: Without dead ends: 24 [2018-11-28 12:46:48,752 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-11-28 12:46:48,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-11-28 12:46:48,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-11-28 12:46:48,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-11-28 12:46:48,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2018-11-28 12:46:48,756 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2018-11-28 12:46:48,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:46:48,757 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2018-11-28 12:46:48,757 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-28 12:46:48,757 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2018-11-28 12:46:48,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-11-28 12:46:48,758 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:46:48,758 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:46:48,758 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:46:48,758 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:46:48,758 INFO L82 PathProgramCache]: Analyzing trace with hash 601942852, now seen corresponding path program 3 times [2018-11-28 12:46:48,758 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:46:48,758 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:46:48,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:46:48,759 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:46:48,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:46:48,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:46:48,827 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-28 12:46:48,827 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:46:48,827 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_47ded97e-e7c0-42ad-8e41-52886ebe22ed/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 12:46:48,836 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 12:46:48,850 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-11-28 12:46:48,850 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:46:48,852 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:46:48,862 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-28 12:46:48,877 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:46:48,877 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-11-28 12:46:48,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-28 12:46:48,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-28 12:46:48,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-11-28 12:46:48,878 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 8 states. [2018-11-28 12:46:48,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:46:48,940 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2018-11-28 12:46:48,941 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-28 12:46:48,941 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2018-11-28 12:46:48,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:46:48,941 INFO L225 Difference]: With dead ends: 31 [2018-11-28 12:46:48,942 INFO L226 Difference]: Without dead ends: 27 [2018-11-28 12:46:48,942 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2018-11-28 12:46:48,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-11-28 12:46:48,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-11-28 12:46:48,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-11-28 12:46:48,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-11-28 12:46:48,946 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2018-11-28 12:46:48,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:46:48,946 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-11-28 12:46:48,947 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-28 12:46:48,947 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-11-28 12:46:48,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-11-28 12:46:48,947 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:46:48,948 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:46:48,948 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:46:48,948 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:46:48,948 INFO L82 PathProgramCache]: Analyzing trace with hash -183109604, now seen corresponding path program 4 times [2018-11-28 12:46:48,948 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:46:48,948 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:46:48,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:46:48,949 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:46:48,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:46:48,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:46:49,022 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-11-28 12:46:49,023 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:46:49,023 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_47ded97e-e7c0-42ad-8e41-52886ebe22ed/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 12:46:49,030 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 12:46:49,043 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 12:46:49,043 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:46:49,045 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:46:49,068 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-11-28 12:46:49,082 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:46:49,082 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-11-28 12:46:49,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-28 12:46:49,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-28 12:46:49,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-11-28 12:46:49,083 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 9 states. [2018-11-28 12:46:49,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:46:49,147 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2018-11-28 12:46:49,147 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-28 12:46:49,147 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2018-11-28 12:46:49,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:46:49,148 INFO L225 Difference]: With dead ends: 34 [2018-11-28 12:46:49,148 INFO L226 Difference]: Without dead ends: 30 [2018-11-28 12:46:49,149 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2018-11-28 12:46:49,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-11-28 12:46:49,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-11-28 12:46:49,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-11-28 12:46:49,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2018-11-28 12:46:49,153 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2018-11-28 12:46:49,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:46:49,154 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2018-11-28 12:46:49,154 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-28 12:46:49,154 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2018-11-28 12:46:49,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-11-28 12:46:49,155 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:46:49,155 INFO L402 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:46:49,155 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:46:49,156 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:46:49,156 INFO L82 PathProgramCache]: Analyzing trace with hash -155447420, now seen corresponding path program 5 times [2018-11-28 12:46:49,156 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:46:49,156 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:46:49,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:46:49,157 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:46:49,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:46:49,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:46:49,258 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-11-28 12:46:49,258 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:46:49,259 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_47ded97e-e7c0-42ad-8e41-52886ebe22ed/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 12:46:49,270 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-28 12:46:49,289 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-11-28 12:46:49,289 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:46:49,292 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:46:49,309 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-11-28 12:46:49,327 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:46:49,328 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-11-28 12:46:49,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-28 12:46:49,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-28 12:46:49,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-11-28 12:46:49,328 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 10 states. [2018-11-28 12:46:49,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:46:49,411 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2018-11-28 12:46:49,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-28 12:46:49,411 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2018-11-28 12:46:49,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:46:49,412 INFO L225 Difference]: With dead ends: 37 [2018-11-28 12:46:49,412 INFO L226 Difference]: Without dead ends: 33 [2018-11-28 12:46:49,413 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2018-11-28 12:46:49,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-11-28 12:46:49,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-11-28 12:46:49,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-11-28 12:46:49,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-11-28 12:46:49,416 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2018-11-28 12:46:49,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:46:49,417 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-11-28 12:46:49,417 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-28 12:46:49,417 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-11-28 12:46:49,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-11-28 12:46:49,418 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:46:49,418 INFO L402 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:46:49,418 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:46:49,418 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:46:49,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1716183644, now seen corresponding path program 6 times [2018-11-28 12:46:49,418 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:46:49,418 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:46:49,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:46:49,419 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:46:49,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:46:49,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:46:49,501 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-11-28 12:46:49,501 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:46:49,502 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_47ded97e-e7c0-42ad-8e41-52886ebe22ed/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 12:46:49,507 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-28 12:46:49,533 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-11-28 12:46:49,533 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:46:49,535 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:46:49,549 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-11-28 12:46:49,563 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:46:49,563 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-11-28 12:46:49,564 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-28 12:46:49,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-28 12:46:49,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2018-11-28 12:46:49,564 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 11 states. [2018-11-28 12:46:49,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:46:49,636 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2018-11-28 12:46:49,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-28 12:46:49,636 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2018-11-28 12:46:49,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:46:49,637 INFO L225 Difference]: With dead ends: 40 [2018-11-28 12:46:49,637 INFO L226 Difference]: Without dead ends: 36 [2018-11-28 12:46:49,638 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2018-11-28 12:46:49,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-11-28 12:46:49,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-11-28 12:46:49,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-11-28 12:46:49,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2018-11-28 12:46:49,644 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2018-11-28 12:46:49,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:46:49,645 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2018-11-28 12:46:49,645 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-28 12:46:49,645 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2018-11-28 12:46:49,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-11-28 12:46:49,646 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:46:49,646 INFO L402 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:46:49,646 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:46:49,646 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:46:49,646 INFO L82 PathProgramCache]: Analyzing trace with hash -1079602236, now seen corresponding path program 7 times [2018-11-28 12:46:49,647 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:46:49,647 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:46:49,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:46:49,649 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:46:49,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:46:49,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:46:49,734 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-11-28 12:46:49,735 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:46:49,735 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_47ded97e-e7c0-42ad-8e41-52886ebe22ed/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 12:46:49,741 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:46:49,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:46:49,756 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:46:49,772 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-11-28 12:46:49,786 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:46:49,787 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-11-28 12:46:49,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-28 12:46:49,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-28 12:46:49,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2018-11-28 12:46:49,787 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 12 states. [2018-11-28 12:46:49,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:46:49,894 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2018-11-28 12:46:49,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-28 12:46:49,895 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2018-11-28 12:46:49,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:46:49,896 INFO L225 Difference]: With dead ends: 43 [2018-11-28 12:46:49,896 INFO L226 Difference]: Without dead ends: 39 [2018-11-28 12:46:49,896 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2018-11-28 12:46:49,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-11-28 12:46:49,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-11-28 12:46:49,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-11-28 12:46:49,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2018-11-28 12:46:49,903 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2018-11-28 12:46:49,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:46:49,903 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2018-11-28 12:46:49,903 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-28 12:46:49,903 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2018-11-28 12:46:49,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-11-28 12:46:49,904 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:46:49,904 INFO L402 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:46:49,905 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:46:49,905 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:46:49,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1035381916, now seen corresponding path program 8 times [2018-11-28 12:46:49,905 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:46:49,905 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:46:49,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:46:49,906 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:46:49,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:46:49,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:46:50,030 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-11-28 12:46:50,030 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:46:50,030 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_47ded97e-e7c0-42ad-8e41-52886ebe22ed/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 12:46:50,036 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 12:46:50,050 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 12:46:50,050 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:46:50,053 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:46:50,069 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-11-28 12:46:50,084 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:46:50,084 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-11-28 12:46:50,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-28 12:46:50,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-28 12:46:50,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2018-11-28 12:46:50,085 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 13 states. [2018-11-28 12:46:50,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:46:50,175 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2018-11-28 12:46:50,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-28 12:46:50,176 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2018-11-28 12:46:50,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:46:50,177 INFO L225 Difference]: With dead ends: 46 [2018-11-28 12:46:50,177 INFO L226 Difference]: Without dead ends: 42 [2018-11-28 12:46:50,177 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2018-11-28 12:46:50,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-11-28 12:46:50,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-11-28 12:46:50,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-11-28 12:46:50,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2018-11-28 12:46:50,180 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2018-11-28 12:46:50,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:46:50,180 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2018-11-28 12:46:50,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-28 12:46:50,180 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2018-11-28 12:46:50,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-11-28 12:46:50,181 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:46:50,181 INFO L402 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:46:50,181 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:46:50,181 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:46:50,181 INFO L82 PathProgramCache]: Analyzing trace with hash 952137732, now seen corresponding path program 9 times [2018-11-28 12:46:50,181 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:46:50,181 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:46:50,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:46:50,182 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:46:50,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:46:50,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:46:50,286 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-11-28 12:46:50,287 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:46:50,287 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_47ded97e-e7c0-42ad-8e41-52886ebe22ed/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 12:46:50,299 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 12:46:50,319 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-11-28 12:46:50,319 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:46:50,321 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:46:50,342 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-11-28 12:46:50,359 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:46:50,359 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-11-28 12:46:50,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-28 12:46:50,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-28 12:46:50,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2018-11-28 12:46:50,360 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 14 states. [2018-11-28 12:46:50,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:46:50,480 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2018-11-28 12:46:50,480 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-28 12:46:50,481 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 67 [2018-11-28 12:46:50,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:46:50,481 INFO L225 Difference]: With dead ends: 49 [2018-11-28 12:46:50,481 INFO L226 Difference]: Without dead ends: 45 [2018-11-28 12:46:50,482 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2018-11-28 12:46:50,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-11-28 12:46:50,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-11-28 12:46:50,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-11-28 12:46:50,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2018-11-28 12:46:50,486 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2018-11-28 12:46:50,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:46:50,487 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2018-11-28 12:46:50,487 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-28 12:46:50,487 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2018-11-28 12:46:50,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-11-28 12:46:50,487 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:46:50,488 INFO L402 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:46:50,488 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:46:50,488 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:46:50,488 INFO L82 PathProgramCache]: Analyzing trace with hash 1540970204, now seen corresponding path program 10 times [2018-11-28 12:46:50,488 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:46:50,488 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:46:50,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:46:50,489 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:46:50,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:46:50,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:46:50,592 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2018-11-28 12:46:50,592 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:46:50,592 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_47ded97e-e7c0-42ad-8e41-52886ebe22ed/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 12:46:50,608 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 12:46:50,630 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 12:46:50,630 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:46:50,633 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:46:50,660 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2018-11-28 12:46:50,676 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:46:50,676 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-11-28 12:46:50,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-28 12:46:50,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-28 12:46:50,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2018-11-28 12:46:50,677 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 15 states. [2018-11-28 12:46:50,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:46:50,802 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2018-11-28 12:46:50,802 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-28 12:46:50,803 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 73 [2018-11-28 12:46:50,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:46:50,803 INFO L225 Difference]: With dead ends: 52 [2018-11-28 12:46:50,804 INFO L226 Difference]: Without dead ends: 48 [2018-11-28 12:46:50,804 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=236, Invalid=414, Unknown=0, NotChecked=0, Total=650 [2018-11-28 12:46:50,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-11-28 12:46:50,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-11-28 12:46:50,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-11-28 12:46:50,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2018-11-28 12:46:50,809 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2018-11-28 12:46:50,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:46:50,809 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2018-11-28 12:46:50,809 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-28 12:46:50,809 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2018-11-28 12:46:50,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-11-28 12:46:50,812 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:46:50,812 INFO L402 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:46:50,812 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:46:50,812 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:46:50,813 INFO L82 PathProgramCache]: Analyzing trace with hash -2010530748, now seen corresponding path program 11 times [2018-11-28 12:46:50,813 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:46:50,813 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:46:50,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:46:50,813 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:46:50,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:46:50,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:46:50,934 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2018-11-28 12:46:50,935 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:46:50,935 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_47ded97e-e7c0-42ad-8e41-52886ebe22ed/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 12:46:50,940 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-28 12:46:50,975 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-11-28 12:46:50,976 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:46:50,978 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:46:50,997 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2018-11-28 12:46:51,022 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:46:51,022 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-11-28 12:46:51,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-28 12:46:51,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-28 12:46:51,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2018-11-28 12:46:51,023 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 16 states. [2018-11-28 12:46:51,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:46:51,172 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2018-11-28 12:46:51,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-28 12:46:51,172 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 79 [2018-11-28 12:46:51,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:46:51,173 INFO L225 Difference]: With dead ends: 55 [2018-11-28 12:46:51,173 INFO L226 Difference]: Without dead ends: 51 [2018-11-28 12:46:51,173 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=275, Invalid=481, Unknown=0, NotChecked=0, Total=756 [2018-11-28 12:46:51,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-11-28 12:46:51,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-11-28 12:46:51,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-11-28 12:46:51,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2018-11-28 12:46:51,176 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2018-11-28 12:46:51,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:46:51,176 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2018-11-28 12:46:51,176 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-28 12:46:51,176 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2018-11-28 12:46:51,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-11-28 12:46:51,176 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:46:51,177 INFO L402 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:46:51,177 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:46:51,177 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:46:51,177 INFO L82 PathProgramCache]: Analyzing trace with hash -986521316, now seen corresponding path program 12 times [2018-11-28 12:46:51,177 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:46:51,177 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:46:51,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:46:51,177 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:46:51,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:46:51,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:46:51,312 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-11-28 12:46:51,313 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:46:51,313 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_47ded97e-e7c0-42ad-8e41-52886ebe22ed/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 12:46:51,324 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-28 12:46:51,367 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-11-28 12:46:51,367 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:46:51,370 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:46:51,393 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-11-28 12:46:51,410 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:46:51,410 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-11-28 12:46:51,410 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-28 12:46:51,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-28 12:46:51,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2018-11-28 12:46:51,411 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 17 states. [2018-11-28 12:46:51,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:46:51,562 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2018-11-28 12:46:51,562 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-28 12:46:51,562 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 85 [2018-11-28 12:46:51,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:46:51,563 INFO L225 Difference]: With dead ends: 58 [2018-11-28 12:46:51,563 INFO L226 Difference]: Without dead ends: 54 [2018-11-28 12:46:51,563 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=317, Invalid=553, Unknown=0, NotChecked=0, Total=870 [2018-11-28 12:46:51,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-11-28 12:46:51,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-11-28 12:46:51,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-11-28 12:46:51,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2018-11-28 12:46:51,566 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2018-11-28 12:46:51,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:46:51,567 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2018-11-28 12:46:51,567 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-28 12:46:51,567 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2018-11-28 12:46:51,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-11-28 12:46:51,568 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:46:51,568 INFO L402 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:46:51,568 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:46:51,568 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:46:51,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1073897604, now seen corresponding path program 13 times [2018-11-28 12:46:51,568 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:46:51,569 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:46:51,569 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:46:51,569 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:46:51,569 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:46:51,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:46:51,685 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2018-11-28 12:46:51,685 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:46:51,685 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_47ded97e-e7c0-42ad-8e41-52886ebe22ed/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 12:46:51,693 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:46:51,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:46:51,714 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:46:51,735 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2018-11-28 12:46:51,751 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:46:51,752 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-11-28 12:46:51,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-28 12:46:51,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-28 12:46:51,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2018-11-28 12:46:51,753 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 18 states. [2018-11-28 12:46:51,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:46:51,914 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2018-11-28 12:46:51,915 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-11-28 12:46:51,915 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 91 [2018-11-28 12:46:51,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:46:51,915 INFO L225 Difference]: With dead ends: 61 [2018-11-28 12:46:51,915 INFO L226 Difference]: Without dead ends: 57 [2018-11-28 12:46:51,916 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=362, Invalid=630, Unknown=0, NotChecked=0, Total=992 [2018-11-28 12:46:51,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-11-28 12:46:51,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-11-28 12:46:51,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-11-28 12:46:51,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2018-11-28 12:46:51,920 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2018-11-28 12:46:51,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:46:51,921 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2018-11-28 12:46:51,921 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-28 12:46:51,921 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2018-11-28 12:46:51,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-11-28 12:46:51,922 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:46:51,922 INFO L402 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:46:51,922 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:46:51,922 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:46:51,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1572648100, now seen corresponding path program 14 times [2018-11-28 12:46:51,922 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:46:51,923 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:46:51,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:46:51,923 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:46:51,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:46:51,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:46:52,061 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2018-11-28 12:46:52,061 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:46:52,061 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_47ded97e-e7c0-42ad-8e41-52886ebe22ed/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 12:46:52,068 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 12:46:52,088 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 12:46:52,088 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:46:52,090 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:46:52,118 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2018-11-28 12:46:52,133 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:46:52,133 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-11-28 12:46:52,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-11-28 12:46:52,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-11-28 12:46:52,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2018-11-28 12:46:52,134 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 19 states. [2018-11-28 12:46:52,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:46:52,300 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2018-11-28 12:46:52,301 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-28 12:46:52,301 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 97 [2018-11-28 12:46:52,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:46:52,301 INFO L225 Difference]: With dead ends: 64 [2018-11-28 12:46:52,302 INFO L226 Difference]: Without dead ends: 60 [2018-11-28 12:46:52,302 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=410, Invalid=712, Unknown=0, NotChecked=0, Total=1122 [2018-11-28 12:46:52,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-11-28 12:46:52,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-11-28 12:46:52,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-11-28 12:46:52,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2018-11-28 12:46:52,305 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2018-11-28 12:46:52,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:46:52,305 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2018-11-28 12:46:52,305 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-11-28 12:46:52,305 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2018-11-28 12:46:52,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-11-28 12:46:52,306 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:46:52,306 INFO L402 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:46:52,307 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:46:52,307 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:46:52,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1584030916, now seen corresponding path program 15 times [2018-11-28 12:46:52,307 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:46:52,307 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:46:52,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:46:52,308 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:46:52,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:46:52,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:46:52,432 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2018-11-28 12:46:52,433 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:46:52,433 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_47ded97e-e7c0-42ad-8e41-52886ebe22ed/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 12:46:52,439 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 12:46:52,466 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-11-28 12:46:52,466 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:46:52,468 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:46:52,493 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2018-11-28 12:46:52,514 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:46:52,514 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-11-28 12:46:52,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-28 12:46:52,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-28 12:46:52,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=223, Unknown=0, NotChecked=0, Total=380 [2018-11-28 12:46:52,515 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 20 states. [2018-11-28 12:46:52,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:46:52,690 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2018-11-28 12:46:52,690 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-11-28 12:46:52,690 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 103 [2018-11-28 12:46:52,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:46:52,691 INFO L225 Difference]: With dead ends: 67 [2018-11-28 12:46:52,691 INFO L226 Difference]: Without dead ends: 63 [2018-11-28 12:46:52,691 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=461, Invalid=799, Unknown=0, NotChecked=0, Total=1260 [2018-11-28 12:46:52,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-11-28 12:46:52,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-11-28 12:46:52,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-11-28 12:46:52,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2018-11-28 12:46:52,696 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 103 [2018-11-28 12:46:52,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:46:52,696 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2018-11-28 12:46:52,696 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-28 12:46:52,696 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2018-11-28 12:46:52,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-11-28 12:46:52,697 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:46:52,697 INFO L402 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:46:52,698 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:46:52,698 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:46:52,698 INFO L82 PathProgramCache]: Analyzing trace with hash 1066046876, now seen corresponding path program 16 times [2018-11-28 12:46:52,698 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:46:52,698 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:46:52,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:46:52,699 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:46:52,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:46:52,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:46:52,855 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2018-11-28 12:46:52,855 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:46:52,855 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_47ded97e-e7c0-42ad-8e41-52886ebe22ed/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 12:46:52,861 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 12:46:52,894 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 12:46:52,895 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:46:52,897 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:46:52,916 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2018-11-28 12:46:52,934 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:46:52,934 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-11-28 12:46:52,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-28 12:46:52,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-28 12:46:52,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=245, Unknown=0, NotChecked=0, Total=420 [2018-11-28 12:46:52,935 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 21 states. [2018-11-28 12:46:53,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:46:53,109 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2018-11-28 12:46:53,109 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-11-28 12:46:53,109 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 109 [2018-11-28 12:46:53,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:46:53,110 INFO L225 Difference]: With dead ends: 70 [2018-11-28 12:46:53,110 INFO L226 Difference]: Without dead ends: 66 [2018-11-28 12:46:53,111 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=515, Invalid=891, Unknown=0, NotChecked=0, Total=1406 [2018-11-28 12:46:53,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-11-28 12:46:53,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-11-28 12:46:53,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-11-28 12:46:53,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2018-11-28 12:46:53,114 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 109 [2018-11-28 12:46:53,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:46:53,115 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2018-11-28 12:46:53,115 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-28 12:46:53,115 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2018-11-28 12:46:53,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-11-28 12:46:53,115 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:46:53,115 INFO L402 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:46:53,115 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:46:53,115 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:46:53,116 INFO L82 PathProgramCache]: Analyzing trace with hash 1300351236, now seen corresponding path program 17 times [2018-11-28 12:46:53,116 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:46:53,116 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:46:53,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:46:53,116 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:46:53,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:46:53,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:46:53,307 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2018-11-28 12:46:53,307 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:46:53,307 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_47ded97e-e7c0-42ad-8e41-52886ebe22ed/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 12:46:53,313 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-28 12:46:53,349 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-11-28 12:46:53,349 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:46:53,352 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:46:53,371 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2018-11-28 12:46:53,385 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:46:53,385 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-11-28 12:46:53,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-11-28 12:46:53,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-11-28 12:46:53,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=268, Unknown=0, NotChecked=0, Total=462 [2018-11-28 12:46:53,386 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 22 states. [2018-11-28 12:46:53,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:46:53,563 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2018-11-28 12:46:53,563 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-11-28 12:46:53,563 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 115 [2018-11-28 12:46:53,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:46:53,564 INFO L225 Difference]: With dead ends: 73 [2018-11-28 12:46:53,564 INFO L226 Difference]: Without dead ends: 69 [2018-11-28 12:46:53,564 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=572, Invalid=988, Unknown=0, NotChecked=0, Total=1560 [2018-11-28 12:46:53,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-11-28 12:46:53,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-11-28 12:46:53,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-11-28 12:46:53,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2018-11-28 12:46:53,567 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 115 [2018-11-28 12:46:53,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:46:53,568 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2018-11-28 12:46:53,568 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-11-28 12:46:53,568 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2018-11-28 12:46:53,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-11-28 12:46:53,568 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:46:53,568 INFO L402 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:46:53,569 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:46:53,569 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:46:53,569 INFO L82 PathProgramCache]: Analyzing trace with hash 227065820, now seen corresponding path program 18 times [2018-11-28 12:46:53,569 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:46:53,569 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:46:53,569 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:46:53,570 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:46:53,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:46:53,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:46:53,735 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2018-11-28 12:46:53,735 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:46:53,735 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_47ded97e-e7c0-42ad-8e41-52886ebe22ed/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 12:46:53,741 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-28 12:46:53,772 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-11-28 12:46:53,772 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:46:53,774 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:46:53,789 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2018-11-28 12:46:53,804 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:46:53,804 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-11-28 12:46:53,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-11-28 12:46:53,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-11-28 12:46:53,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=292, Unknown=0, NotChecked=0, Total=506 [2018-11-28 12:46:53,804 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 23 states. [2018-11-28 12:46:54,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:46:54,022 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2018-11-28 12:46:54,022 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-11-28 12:46:54,022 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 121 [2018-11-28 12:46:54,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:46:54,023 INFO L225 Difference]: With dead ends: 76 [2018-11-28 12:46:54,023 INFO L226 Difference]: Without dead ends: 72 [2018-11-28 12:46:54,023 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=632, Invalid=1090, Unknown=0, NotChecked=0, Total=1722 [2018-11-28 12:46:54,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-11-28 12:46:54,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-11-28 12:46:54,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-11-28 12:46:54,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2018-11-28 12:46:54,025 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 121 [2018-11-28 12:46:54,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:46:54,026 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2018-11-28 12:46:54,026 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-11-28 12:46:54,026 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2018-11-28 12:46:54,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-11-28 12:46:54,026 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:46:54,026 INFO L402 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:46:54,027 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:46:54,027 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:46:54,027 INFO L82 PathProgramCache]: Analyzing trace with hash -479687356, now seen corresponding path program 19 times [2018-11-28 12:46:54,027 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:46:54,027 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:46:54,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:46:54,027 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:46:54,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:46:54,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:46:54,201 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2018-11-28 12:46:54,201 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:46:54,201 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_47ded97e-e7c0-42ad-8e41-52886ebe22ed/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 12:46:54,207 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:46:54,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:46:54,231 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:46:54,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2018-11-28 12:46:54,264 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:46:54,264 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-11-28 12:46:54,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-11-28 12:46:54,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-11-28 12:46:54,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=317, Unknown=0, NotChecked=0, Total=552 [2018-11-28 12:46:54,265 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 24 states. [2018-11-28 12:46:54,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:46:54,491 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2018-11-28 12:46:54,491 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-11-28 12:46:54,491 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 127 [2018-11-28 12:46:54,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:46:54,492 INFO L225 Difference]: With dead ends: 79 [2018-11-28 12:46:54,492 INFO L226 Difference]: Without dead ends: 75 [2018-11-28 12:46:54,492 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=695, Invalid=1197, Unknown=0, NotChecked=0, Total=1892 [2018-11-28 12:46:54,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-11-28 12:46:54,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-11-28 12:46:54,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-11-28 12:46:54,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2018-11-28 12:46:54,495 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 127 [2018-11-28 12:46:54,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:46:54,495 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2018-11-28 12:46:54,495 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-11-28 12:46:54,496 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2018-11-28 12:46:54,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-11-28 12:46:54,496 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:46:54,496 INFO L402 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:46:54,496 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:46:54,497 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:46:54,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1598174692, now seen corresponding path program 20 times [2018-11-28 12:46:54,497 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:46:54,497 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:46:54,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:46:54,497 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:46:54,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:46:54,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:46:54,690 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2018-11-28 12:46:54,690 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:46:54,690 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_47ded97e-e7c0-42ad-8e41-52886ebe22ed/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 12:46:54,697 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 12:46:54,726 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 12:46:54,726 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:46:54,729 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:46:54,751 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2018-11-28 12:46:54,766 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:46:54,766 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-11-28 12:46:54,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-11-28 12:46:54,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-11-28 12:46:54,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=343, Unknown=0, NotChecked=0, Total=600 [2018-11-28 12:46:54,767 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 25 states. [2018-11-28 12:46:54,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:46:54,989 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2018-11-28 12:46:54,989 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-11-28 12:46:54,989 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 133 [2018-11-28 12:46:54,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:46:54,990 INFO L225 Difference]: With dead ends: 82 [2018-11-28 12:46:54,990 INFO L226 Difference]: Without dead ends: 78 [2018-11-28 12:46:54,991 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=761, Invalid=1309, Unknown=0, NotChecked=0, Total=2070 [2018-11-28 12:46:54,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-11-28 12:46:54,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-11-28 12:46:54,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-11-28 12:46:54,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2018-11-28 12:46:54,993 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 133 [2018-11-28 12:46:54,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:46:54,993 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2018-11-28 12:46:54,993 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-11-28 12:46:54,993 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2018-11-28 12:46:54,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2018-11-28 12:46:54,993 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:46:54,993 INFO L402 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:46:54,994 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:46:54,994 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:46:54,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1648275844, now seen corresponding path program 21 times [2018-11-28 12:46:54,994 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:46:54,994 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:46:54,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:46:54,994 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:46:54,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:46:55,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:46:55,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2018-11-28 12:46:55,222 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:46:55,222 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_47ded97e-e7c0-42ad-8e41-52886ebe22ed/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 12:46:55,227 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 12:46:55,265 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-11-28 12:46:55,265 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:46:55,267 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:46:55,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2018-11-28 12:46:55,310 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:46:55,310 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-11-28 12:46:55,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-11-28 12:46:55,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-11-28 12:46:55,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=370, Unknown=0, NotChecked=0, Total=650 [2018-11-28 12:46:55,311 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 26 states. [2018-11-28 12:46:55,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:46:55,554 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2018-11-28 12:46:55,555 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-11-28 12:46:55,555 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 139 [2018-11-28 12:46:55,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:46:55,556 INFO L225 Difference]: With dead ends: 85 [2018-11-28 12:46:55,556 INFO L226 Difference]: Without dead ends: 81 [2018-11-28 12:46:55,556 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=830, Invalid=1426, Unknown=0, NotChecked=0, Total=2256 [2018-11-28 12:46:55,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-11-28 12:46:55,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-11-28 12:46:55,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-11-28 12:46:55,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2018-11-28 12:46:55,559 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 139 [2018-11-28 12:46:55,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:46:55,559 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2018-11-28 12:46:55,559 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-11-28 12:46:55,559 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2018-11-28 12:46:55,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2018-11-28 12:46:55,560 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:46:55,560 INFO L402 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:46:55,560 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:46:55,560 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:46:55,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1314278308, now seen corresponding path program 22 times [2018-11-28 12:46:55,561 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:46:55,561 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:46:55,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:46:55,561 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:46:55,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:46:55,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:46:55,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2018-11-28 12:46:55,822 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:46:55,822 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_47ded97e-e7c0-42ad-8e41-52886ebe22ed/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 12:46:55,830 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 12:46:55,858 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 12:46:55,858 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:46:55,861 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:46:55,886 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2018-11-28 12:46:55,910 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:46:55,910 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-11-28 12:46:55,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-11-28 12:46:55,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-11-28 12:46:55,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=398, Unknown=0, NotChecked=0, Total=702 [2018-11-28 12:46:55,911 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 27 states. [2018-11-28 12:46:56,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:46:56,212 INFO L93 Difference]: Finished difference Result 88 states and 89 transitions. [2018-11-28 12:46:56,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-11-28 12:46:56,213 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 145 [2018-11-28 12:46:56,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:46:56,214 INFO L225 Difference]: With dead ends: 88 [2018-11-28 12:46:56,214 INFO L226 Difference]: Without dead ends: 84 [2018-11-28 12:46:56,215 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=902, Invalid=1548, Unknown=0, NotChecked=0, Total=2450 [2018-11-28 12:46:56,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-11-28 12:46:56,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-11-28 12:46:56,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-11-28 12:46:56,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2018-11-28 12:46:56,219 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 145 [2018-11-28 12:46:56,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:46:56,219 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2018-11-28 12:46:56,219 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-11-28 12:46:56,219 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2018-11-28 12:46:56,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2018-11-28 12:46:56,220 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:46:56,220 INFO L402 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:46:56,220 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:46:56,220 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:46:56,220 INFO L82 PathProgramCache]: Analyzing trace with hash 2015638980, now seen corresponding path program 23 times [2018-11-28 12:46:56,221 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:46:56,221 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:46:56,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:46:56,221 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:46:56,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:46:56,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:46:56,458 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2018-11-28 12:46:56,458 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:46:56,458 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_47ded97e-e7c0-42ad-8e41-52886ebe22ed/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 12:46:56,474 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-28 12:46:56,530 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-11-28 12:46:56,530 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:46:56,533 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:46:56,561 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2018-11-28 12:46:56,576 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:46:56,576 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-11-28 12:46:56,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-11-28 12:46:56,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-11-28 12:46:56,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=427, Unknown=0, NotChecked=0, Total=756 [2018-11-28 12:46:56,577 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand 28 states. [2018-11-28 12:46:56,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:46:56,828 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2018-11-28 12:46:56,828 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-11-28 12:46:56,828 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 151 [2018-11-28 12:46:56,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:46:56,829 INFO L225 Difference]: With dead ends: 91 [2018-11-28 12:46:56,829 INFO L226 Difference]: Without dead ends: 87 [2018-11-28 12:46:56,830 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=977, Invalid=1675, Unknown=0, NotChecked=0, Total=2652 [2018-11-28 12:46:56,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-11-28 12:46:56,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-11-28 12:46:56,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-11-28 12:46:56,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2018-11-28 12:46:56,833 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 151 [2018-11-28 12:46:56,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:46:56,833 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2018-11-28 12:46:56,833 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-11-28 12:46:56,833 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2018-11-28 12:46:56,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2018-11-28 12:46:56,834 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:46:56,834 INFO L402 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:46:56,834 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:46:56,834 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:46:56,834 INFO L82 PathProgramCache]: Analyzing trace with hash 483163804, now seen corresponding path program 24 times [2018-11-28 12:46:56,834 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:46:56,834 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:46:56,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:46:56,834 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:46:56,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:46:56,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:46:57,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2018-11-28 12:46:57,112 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:46:57,112 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_47ded97e-e7c0-42ad-8e41-52886ebe22ed/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 12:46:57,118 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-28 12:46:57,163 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-11-28 12:46:57,163 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:46:57,166 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:46:57,185 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2018-11-28 12:46:57,200 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:46:57,200 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-11-28 12:46:57,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-11-28 12:46:57,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-11-28 12:46:57,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=457, Unknown=0, NotChecked=0, Total=812 [2018-11-28 12:46:57,201 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 29 states. [2018-11-28 12:46:57,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:46:57,467 INFO L93 Difference]: Finished difference Result 94 states and 95 transitions. [2018-11-28 12:46:57,467 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-11-28 12:46:57,467 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 157 [2018-11-28 12:46:57,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:46:57,468 INFO L225 Difference]: With dead ends: 94 [2018-11-28 12:46:57,468 INFO L226 Difference]: Without dead ends: 90 [2018-11-28 12:46:57,468 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1055, Invalid=1807, Unknown=0, NotChecked=0, Total=2862 [2018-11-28 12:46:57,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-11-28 12:46:57,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-11-28 12:46:57,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-11-28 12:46:57,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2018-11-28 12:46:57,471 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 157 [2018-11-28 12:46:57,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:46:57,471 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2018-11-28 12:46:57,471 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-11-28 12:46:57,471 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2018-11-28 12:46:57,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2018-11-28 12:46:57,472 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:46:57,472 INFO L402 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:46:57,472 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:46:57,472 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:46:57,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1060706820, now seen corresponding path program 25 times [2018-11-28 12:46:57,473 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:46:57,473 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:46:57,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:46:57,473 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:46:57,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:46:57,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:46:58,846 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 0 proven. 999 refuted. 0 times theorem prover too weak. 901 trivial. 0 not checked. [2018-11-28 12:46:58,847 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:46:58,847 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_47ded97e-e7c0-42ad-8e41-52886ebe22ed/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 12:46:58,853 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:46:58,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:46:58,889 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:47:01,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 949 proven. 50 refuted. 0 times theorem prover too weak. 901 trivial. 0 not checked. [2018-11-28 12:47:01,987 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:47:01,988 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 116 [2018-11-28 12:47:01,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 116 states [2018-11-28 12:47:01,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2018-11-28 12:47:01,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=843, Invalid=12497, Unknown=0, NotChecked=0, Total=13340 [2018-11-28 12:47:01,990 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand 116 states. [2018-11-28 12:47:05,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:47:05,152 INFO L93 Difference]: Finished difference Result 93 states and 95 transitions. [2018-11-28 12:47:05,152 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-11-28 12:47:05,152 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 163 [2018-11-28 12:47:05,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:47:05,152 INFO L225 Difference]: With dead ends: 93 [2018-11-28 12:47:05,152 INFO L226 Difference]: Without dead ends: 0 [2018-11-28 12:47:05,155 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4275 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=2079, Invalid=26651, Unknown=0, NotChecked=0, Total=28730 [2018-11-28 12:47:05,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-28 12:47:05,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-28 12:47:05,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-28 12:47:05,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-28 12:47:05,155 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 163 [2018-11-28 12:47:05,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:47:05,155 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-28 12:47:05,155 INFO L481 AbstractCegarLoop]: Interpolant automaton has 116 states. [2018-11-28 12:47:05,155 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-28 12:47:05,156 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-28 12:47:05,159 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-28 12:47:05,174 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-28 12:47:05,175 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-28 12:47:05,175 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-28 12:47:05,175 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-28 12:47:05,175 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-28 12:47:05,175 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-28 12:47:05,175 INFO L448 ceAbstractionStarter]: For program point sumEXIT(lines 3 9) no Hoare annotation was computed. [2018-11-28 12:47:05,175 INFO L444 ceAbstractionStarter]: At program point L7(line 7) the Hoare annotation is: (and (= sum_~m |sum_#in~m|) (= sum_~n |sum_#in~n|) (< 0 sum_~n)) [2018-11-28 12:47:05,175 INFO L448 ceAbstractionStarter]: For program point L7-1(line 7) no Hoare annotation was computed. [2018-11-28 12:47:05,175 INFO L448 ceAbstractionStarter]: For program point L4(lines 4 8) no Hoare annotation was computed. [2018-11-28 12:47:05,175 INFO L448 ceAbstractionStarter]: For program point sumFINAL(lines 3 9) no Hoare annotation was computed. [2018-11-28 12:47:05,175 INFO L451 ceAbstractionStarter]: At program point sumENTRY(lines 3 9) the Hoare annotation is: true [2018-11-28 12:47:05,175 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 11 18) the Hoare annotation is: true [2018-11-28 12:47:05,175 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 11 18) no Hoare annotation was computed. [2018-11-28 12:47:05,175 INFO L448 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2018-11-28 12:47:05,175 INFO L448 ceAbstractionStarter]: For program point L16(line 16) no Hoare annotation was computed. [2018-11-28 12:47:05,175 INFO L448 ceAbstractionStarter]: For program point L15(lines 15 17) no Hoare annotation was computed. [2018-11-28 12:47:05,175 INFO L444 ceAbstractionStarter]: At program point L14(line 14) the Hoare annotation is: (and (<= main_~a~0 25) (<= 25 main_~a~0)) [2018-11-28 12:47:05,175 INFO L448 ceAbstractionStarter]: For program point L14-1(line 14) no Hoare annotation was computed. [2018-11-28 12:47:05,175 INFO L448 ceAbstractionStarter]: For program point L15-2(lines 11 18) no Hoare annotation was computed. [2018-11-28 12:47:05,177 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 12:47:05 BoogieIcfgContainer [2018-11-28 12:47:05,177 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-28 12:47:05,178 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-28 12:47:05,178 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-28 12:47:05,178 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-28 12:47:05,179 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 12:46:48" (3/4) ... [2018-11-28 12:47:05,182 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-28 12:47:05,187 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-28 12:47:05,188 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure sum [2018-11-28 12:47:05,188 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-28 12:47:05,191 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-11-28 12:47:05,191 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2018-11-28 12:47:05,191 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-28 12:47:05,217 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_47ded97e-e7c0-42ad-8e41-52886ebe22ed/bin-2019/uautomizer/witness.graphml [2018-11-28 12:47:05,217 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-28 12:47:05,218 INFO L168 Benchmark]: Toolchain (without parser) took 17546.34 ms. Allocated memory was 1.0 GB in the beginning and 1.5 GB in the end (delta: 486.0 MB). Free memory was 957.6 MB in the beginning and 1.2 GB in the end (delta: -200.7 MB). Peak memory consumption was 285.3 MB. Max. memory is 11.5 GB. [2018-11-28 12:47:05,219 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 985.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 12:47:05,219 INFO L168 Benchmark]: CACSL2BoogieTranslator took 167.88 ms. Allocated memory is still 1.0 GB. Free memory was 957.6 MB in the beginning and 949.5 MB in the end (delta: 8.1 MB). Peak memory consumption was 8.1 MB. Max. memory is 11.5 GB. [2018-11-28 12:47:05,219 INFO L168 Benchmark]: Boogie Procedure Inliner took 16.02 ms. Allocated memory is still 1.0 GB. Free memory is still 946.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 12:47:05,219 INFO L168 Benchmark]: Boogie Preprocessor took 11.91 ms. Allocated memory is still 1.0 GB. Free memory is still 946.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 12:47:05,220 INFO L168 Benchmark]: RCFGBuilder took 167.18 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 141.6 MB). Free memory was 946.8 MB in the beginning and 1.1 GB in the end (delta: -179.4 MB). Peak memory consumption was 15.7 MB. Max. memory is 11.5 GB. [2018-11-28 12:47:05,220 INFO L168 Benchmark]: TraceAbstraction took 17140.24 ms. Allocated memory was 1.2 GB in the beginning and 1.5 GB in the end (delta: 344.5 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -32.5 MB). Peak memory consumption was 312.0 MB. Max. memory is 11.5 GB. [2018-11-28 12:47:05,220 INFO L168 Benchmark]: Witness Printer took 39.65 ms. Allocated memory is still 1.5 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 328.8 kB). Peak memory consumption was 328.8 kB. Max. memory is 11.5 GB. [2018-11-28 12:47:05,222 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 985.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 167.88 ms. Allocated memory is still 1.0 GB. Free memory was 957.6 MB in the beginning and 949.5 MB in the end (delta: 8.1 MB). Peak memory consumption was 8.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 16.02 ms. Allocated memory is still 1.0 GB. Free memory is still 946.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 11.91 ms. Allocated memory is still 1.0 GB. Free memory is still 946.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 167.18 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 141.6 MB). Free memory was 946.8 MB in the beginning and 1.1 GB in the end (delta: -179.4 MB). Peak memory consumption was 15.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 17140.24 ms. Allocated memory was 1.2 GB in the beginning and 1.5 GB in the end (delta: 344.5 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -32.5 MB). Peak memory consumption was 312.0 MB. Max. memory is 11.5 GB. * Witness Printer took 39.65 ms. Allocated memory is still 1.5 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 328.8 kB). Peak memory consumption was 328.8 kB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. SAFE Result, 17.0s OverallTime, 26 OverallIterations, 26 TraceHistogramMax, 7.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 337 SDtfs, 916 SDslu, 4555 SDs, 0 SdLazy, 5554 SolverSat, 328 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3437 GetRequests, 2569 SyntacticMatches, 0 SemanticMatches, 868 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6875 ImplicationChecksByTransitivity, 11.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=90occurred in iteration=25, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 26 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 9 PreInvPairs, 9 NumberOfFragments, 22 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 3 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 8.0s InterpolantComputationTime, 4563 NumberOfCodeBlocks, 4563 NumberOfCodeBlocksAsserted, 223 NumberOfCheckSat, 4512 ConstructedInterpolants, 0 QuantifiedInterpolants, 1548000 SizeOfPredicates, 403 NumberOfNonLiveVariables, 6750 ConjunctsInSsa, 963 ConjunctsInUnsatCore, 51 InterpolantComputations, 1 PerfectInterpolantSequences, 17751/33800 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...