./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/id_i25_o25_true-unreach-call_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aa418289 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_8d673c10-ac7e-4c23-bc35-301b6f0400df/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_8d673c10-ac7e-4c23-bc35-301b6f0400df/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_8d673c10-ac7e-4c23-bc35-301b6f0400df/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_8d673c10-ac7e-4c23-bc35-301b6f0400df/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/id_i25_o25_true-unreach-call_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_8d673c10-ac7e-4c23-bc35-301b6f0400df/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_8d673c10-ac7e-4c23-bc35-301b6f0400df/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 980109aaf5797fcdc56688cd1127831babfd66a2 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-aa41828 [2018-11-23 12:56:04,978 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-23 12:56:04,979 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-23 12:56:04,987 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-23 12:56:04,987 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-23 12:56:04,987 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-23 12:56:04,988 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-23 12:56:04,989 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-23 12:56:04,990 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-23 12:56:04,991 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-23 12:56:04,992 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-23 12:56:04,992 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-23 12:56:04,992 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-23 12:56:04,993 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-23 12:56:04,994 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-23 12:56:04,994 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-23 12:56:04,995 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-23 12:56:04,996 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-23 12:56:04,997 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-23 12:56:04,999 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-23 12:56:04,999 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-23 12:56:05,000 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-23 12:56:05,002 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-23 12:56:05,002 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-23 12:56:05,002 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-23 12:56:05,003 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-23 12:56:05,004 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-23 12:56:05,004 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-23 12:56:05,005 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-23 12:56:05,005 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-23 12:56:05,006 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-23 12:56:05,006 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-23 12:56:05,006 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-23 12:56:05,006 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-23 12:56:05,007 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-23 12:56:05,008 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-23 12:56:05,008 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_8d673c10-ac7e-4c23-bc35-301b6f0400df/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-11-23 12:56:05,017 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-23 12:56:05,018 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-23 12:56:05,018 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-23 12:56:05,018 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-11-23 12:56:05,018 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-23 12:56:05,018 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-23 12:56:05,019 INFO L133 SettingsManager]: * Use SBE=true [2018-11-23 12:56:05,019 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-23 12:56:05,019 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-23 12:56:05,019 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-23 12:56:05,019 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-23 12:56:05,019 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-23 12:56:05,019 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-23 12:56:05,019 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-23 12:56:05,020 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-23 12:56:05,020 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-23 12:56:05,020 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-23 12:56:05,020 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-23 12:56:05,020 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-23 12:56:05,020 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-23 12:56:05,020 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-23 12:56:05,020 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-23 12:56:05,021 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-23 12:56:05,021 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-23 12:56:05,021 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-23 12:56:05,021 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-23 12:56:05,021 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-23 12:56:05,021 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-23 12:56:05,021 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-23 12:56:05,021 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-23 12:56:05,021 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_8d673c10-ac7e-4c23-bc35-301b6f0400df/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 -> 980109aaf5797fcdc56688cd1127831babfd66a2 [2018-11-23 12:56:05,044 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-23 12:56:05,052 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-23 12:56:05,054 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-23 12:56:05,054 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-23 12:56:05,055 INFO L276 PluginConnector]: CDTParser initialized [2018-11-23 12:56:05,055 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_8d673c10-ac7e-4c23-bc35-301b6f0400df/bin-2019/uautomizer/../../sv-benchmarks/c/recursive-simple/id_i25_o25_true-unreach-call_true-termination.c [2018-11-23 12:56:05,091 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_8d673c10-ac7e-4c23-bc35-301b6f0400df/bin-2019/uautomizer/data/3bd09f342/a90f79291a54409296493a32180d9c64/FLAG4e454b792 [2018-11-23 12:56:05,478 INFO L307 CDTParser]: Found 1 translation units. [2018-11-23 12:56:05,478 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_8d673c10-ac7e-4c23-bc35-301b6f0400df/sv-benchmarks/c/recursive-simple/id_i25_o25_true-unreach-call_true-termination.c [2018-11-23 12:56:05,482 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_8d673c10-ac7e-4c23-bc35-301b6f0400df/bin-2019/uautomizer/data/3bd09f342/a90f79291a54409296493a32180d9c64/FLAG4e454b792 [2018-11-23 12:56:05,494 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_8d673c10-ac7e-4c23-bc35-301b6f0400df/bin-2019/uautomizer/data/3bd09f342/a90f79291a54409296493a32180d9c64 [2018-11-23 12:56:05,496 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-23 12:56:05,496 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-23 12:56:05,497 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-23 12:56:05,497 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-23 12:56:05,500 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-23 12:56:05,501 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 12:56:05" (1/1) ... [2018-11-23 12:56:05,503 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26e45308 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:56:05, skipping insertion in model container [2018-11-23 12:56:05,503 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 12:56:05" (1/1) ... [2018-11-23 12:56:05,511 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-23 12:56:05,522 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-23 12:56:05,617 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-23 12:56:05,619 INFO L191 MainTranslator]: Completed pre-run [2018-11-23 12:56:05,627 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-23 12:56:05,635 INFO L195 MainTranslator]: Completed translation [2018-11-23 12:56:05,635 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:56:05 WrapperNode [2018-11-23 12:56:05,635 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-23 12:56:05,635 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-23 12:56:05,635 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-23 12:56:05,636 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-23 12:56:05,643 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:56:05" (1/1) ... [2018-11-23 12:56:05,647 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:56:05" (1/1) ... [2018-11-23 12:56:05,652 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-23 12:56:05,653 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-23 12:56:05,653 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-23 12:56:05,653 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-23 12:56:05,660 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:56:05" (1/1) ... [2018-11-23 12:56:05,661 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:56:05" (1/1) ... [2018-11-23 12:56:05,661 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:56:05" (1/1) ... [2018-11-23 12:56:05,661 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:56:05" (1/1) ... [2018-11-23 12:56:05,664 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:56:05" (1/1) ... [2018-11-23 12:56:05,665 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:56:05" (1/1) ... [2018-11-23 12:56:05,666 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:56:05" (1/1) ... [2018-11-23 12:56:05,667 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-23 12:56:05,667 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-23 12:56:05,667 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-23 12:56:05,667 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-23 12:56:05,668 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:56:05" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8d673c10-ac7e-4c23-bc35-301b6f0400df/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 [2018-11-23 12:56:05,746 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-23 12:56:05,746 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-23 12:56:05,746 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-23 12:56:05,746 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-23 12:56:05,746 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-23 12:56:05,747 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-23 12:56:05,747 INFO L130 BoogieDeclarations]: Found specification of procedure id [2018-11-23 12:56:05,747 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2018-11-23 12:56:05,845 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-23 12:56:05,846 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-11-23 12:56:05,846 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 12:56:05 BoogieIcfgContainer [2018-11-23 12:56:05,846 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-23 12:56:05,847 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-23 12:56:05,847 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-23 12:56:05,849 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-23 12:56:05,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 12:56:05" (1/3) ... [2018-11-23 12:56:05,850 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38b0bf6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 12:56:05, skipping insertion in model container [2018-11-23 12:56:05,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:56:05" (2/3) ... [2018-11-23 12:56:05,850 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38b0bf6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 12:56:05, skipping insertion in model container [2018-11-23 12:56:05,851 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 12:56:05" (3/3) ... [2018-11-23 12:56:05,852 INFO L112 eAbstractionObserver]: Analyzing ICFG id_i25_o25_true-unreach-call_true-termination.c [2018-11-23 12:56:05,860 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-23 12:56:05,866 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-23 12:56:05,879 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-23 12:56:05,905 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-23 12:56:05,905 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-23 12:56:05,906 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-23 12:56:05,906 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-23 12:56:05,906 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-23 12:56:05,906 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-23 12:56:05,906 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-23 12:56:05,906 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-23 12:56:05,906 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-23 12:56:05,921 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2018-11-23 12:56:05,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-23 12:56:05,926 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 12:56:05,927 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 12:56:05,929 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 12:56:05,933 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 12:56:05,934 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2018-11-23 12:56:05,935 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 12:56:05,936 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 12:56:05,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:56:05,975 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 12:56:05,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:56:05,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 12:56:06,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 12:56:06,055 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-23 12:56:06,055 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-23 12:56:06,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-23 12:56:06,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-23 12:56:06,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-23 12:56:06,068 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2018-11-23 12:56:06,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 12:56:06,121 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2018-11-23 12:56:06,121 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-23 12:56:06,122 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-11-23 12:56:06,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 12:56:06,131 INFO L225 Difference]: With dead ends: 30 [2018-11-23 12:56:06,132 INFO L226 Difference]: Without dead ends: 18 [2018-11-23 12:56:06,135 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 [2018-11-23 12:56:06,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-11-23 12:56:06,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-11-23 12:56:06,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-11-23 12:56:06,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2018-11-23 12:56:06,161 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2018-11-23 12:56:06,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 12:56:06,162 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2018-11-23 12:56:06,162 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-23 12:56:06,162 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2018-11-23 12:56:06,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-11-23 12:56:06,163 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 12:56:06,164 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 12:56:06,164 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 12:56:06,164 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 12:56:06,164 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2018-11-23 12:56:06,164 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 12:56:06,165 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 12:56:06,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:56:06,165 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 12:56:06,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:56:06,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 12:56:06,218 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-23 12:56:06,218 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 12:56:06,218 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8d673c10-ac7e-4c23-bc35-301b6f0400df/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 [2018-11-23 12:56:06,235 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 12:56:06,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 12:56:06,252 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 12:56:06,277 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-23 12:56:06,293 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 12:56:06,293 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-11-23 12:56:06,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-23 12:56:06,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-23 12:56:06,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-11-23 12:56:06,294 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2018-11-23 12:56:06,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 12:56:06,357 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-11-23 12:56:06,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-23 12:56:06,358 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2018-11-23 12:56:06,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 12:56:06,358 INFO L225 Difference]: With dead ends: 25 [2018-11-23 12:56:06,358 INFO L226 Difference]: Without dead ends: 21 [2018-11-23 12:56:06,359 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 [2018-11-23 12:56:06,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-11-23 12:56:06,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-11-23 12:56:06,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-11-23 12:56:06,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-11-23 12:56:06,362 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2018-11-23 12:56:06,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 12:56:06,362 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-11-23 12:56:06,362 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-23 12:56:06,362 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-11-23 12:56:06,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-11-23 12:56:06,363 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 12:56:06,363 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 12:56:06,363 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 12:56:06,363 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 12:56:06,364 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2018-11-23 12:56:06,364 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 12:56:06,364 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 12:56:06,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:56:06,364 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 12:56:06,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:56:06,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 12:56:06,435 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-23 12:56:06,435 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 12:56:06,435 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8d673c10-ac7e-4c23-bc35-301b6f0400df/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 [2018-11-23 12:56:06,446 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-23 12:56:06,457 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-23 12:56:06,458 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 12:56:06,459 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 12:56:06,471 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-23 12:56:06,485 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 12:56:06,486 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-11-23 12:56:06,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-23 12:56:06,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-23 12:56:06,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-11-23 12:56:06,486 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 7 states. [2018-11-23 12:56:06,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 12:56:06,527 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2018-11-23 12:56:06,528 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-23 12:56:06,528 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2018-11-23 12:56:06,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 12:56:06,528 INFO L225 Difference]: With dead ends: 28 [2018-11-23 12:56:06,528 INFO L226 Difference]: Without dead ends: 24 [2018-11-23 12:56:06,529 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 [2018-11-23 12:56:06,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-11-23 12:56:06,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-11-23 12:56:06,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-11-23 12:56:06,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2018-11-23 12:56:06,533 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2018-11-23 12:56:06,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 12:56:06,533 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2018-11-23 12:56:06,534 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-23 12:56:06,534 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2018-11-23 12:56:06,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-11-23 12:56:06,534 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 12:56:06,534 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 12:56:06,535 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 12:56:06,535 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 12:56:06,535 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2018-11-23 12:56:06,535 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 12:56:06,535 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 12:56:06,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:56:06,536 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 12:56:06,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:56:06,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 12:56:06,600 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-23 12:56:06,600 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 12:56:06,601 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8d673c10-ac7e-4c23-bc35-301b6f0400df/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 [2018-11-23 12:56:06,612 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-23 12:56:06,624 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-11-23 12:56:06,625 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 12:56:06,627 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 12:56:06,646 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-23 12:56:06,661 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 12:56:06,661 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-11-23 12:56:06,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-23 12:56:06,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-23 12:56:06,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-11-23 12:56:06,662 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 8 states. [2018-11-23 12:56:06,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 12:56:06,725 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2018-11-23 12:56:06,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-23 12:56:06,726 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2018-11-23 12:56:06,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 12:56:06,726 INFO L225 Difference]: With dead ends: 31 [2018-11-23 12:56:06,726 INFO L226 Difference]: Without dead ends: 27 [2018-11-23 12:56:06,727 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 [2018-11-23 12:56:06,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-11-23 12:56:06,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-11-23 12:56:06,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-11-23 12:56:06,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-11-23 12:56:06,731 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2018-11-23 12:56:06,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 12:56:06,731 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-11-23 12:56:06,731 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-23 12:56:06,731 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-11-23 12:56:06,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-11-23 12:56:06,732 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 12:56:06,732 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 12:56:06,732 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 12:56:06,732 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 12:56:06,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1080764669, now seen corresponding path program 4 times [2018-11-23 12:56:06,732 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 12:56:06,733 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 12:56:06,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:56:06,733 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 12:56:06,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:56:06,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 12:56:06,803 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-11-23 12:56:06,803 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 12:56:06,803 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8d673c10-ac7e-4c23-bc35-301b6f0400df/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 [2018-11-23 12:56:06,810 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-23 12:56:06,821 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-23 12:56:06,821 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 12:56:06,824 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 12:56:06,838 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-11-23 12:56:06,854 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 12:56:06,854 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-11-23 12:56:06,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-23 12:56:06,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-23 12:56:06,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-11-23 12:56:06,855 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 9 states. [2018-11-23 12:56:06,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 12:56:06,912 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2018-11-23 12:56:06,913 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-23 12:56:06,913 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2018-11-23 12:56:06,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 12:56:06,914 INFO L225 Difference]: With dead ends: 34 [2018-11-23 12:56:06,914 INFO L226 Difference]: Without dead ends: 30 [2018-11-23 12:56:06,914 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 [2018-11-23 12:56:06,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-11-23 12:56:06,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-11-23 12:56:06,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-11-23 12:56:06,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2018-11-23 12:56:06,919 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2018-11-23 12:56:06,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 12:56:06,920 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2018-11-23 12:56:06,920 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-23 12:56:06,920 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2018-11-23 12:56:06,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-11-23 12:56:06,921 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 12:56:06,921 INFO L402 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 12:56:06,921 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 12:56:06,921 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 12:56:06,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1752970513, now seen corresponding path program 5 times [2018-11-23 12:56:06,922 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 12:56:06,922 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 12:56:06,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:56:06,922 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 12:56:06,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:56:06,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 12:56:06,999 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-11-23 12:56:06,999 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 12:56:06,999 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8d673c10-ac7e-4c23-bc35-301b6f0400df/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 [2018-11-23 12:56:07,009 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-23 12:56:07,022 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-11-23 12:56:07,022 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 12:56:07,025 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 12:56:07,039 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-11-23 12:56:07,053 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 12:56:07,053 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-11-23 12:56:07,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-23 12:56:07,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-23 12:56:07,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-11-23 12:56:07,054 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 10 states. [2018-11-23 12:56:07,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 12:56:07,133 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2018-11-23 12:56:07,137 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-23 12:56:07,137 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2018-11-23 12:56:07,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 12:56:07,138 INFO L225 Difference]: With dead ends: 37 [2018-11-23 12:56:07,138 INFO L226 Difference]: Without dead ends: 33 [2018-11-23 12:56:07,139 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2018-11-23 12:56:07,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-11-23 12:56:07,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-11-23 12:56:07,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-11-23 12:56:07,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-11-23 12:56:07,142 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2018-11-23 12:56:07,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 12:56:07,142 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-11-23 12:56:07,143 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-23 12:56:07,143 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-11-23 12:56:07,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-11-23 12:56:07,143 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 12:56:07,144 INFO L402 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 12:56:07,144 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 12:56:07,144 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 12:56:07,144 INFO L82 PathProgramCache]: Analyzing trace with hash -1590630787, now seen corresponding path program 6 times [2018-11-23 12:56:07,144 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 12:56:07,144 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 12:56:07,145 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:56:07,145 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 12:56:07,145 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:56:07,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 12:56:07,237 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-11-23 12:56:07,237 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 12:56:07,237 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8d673c10-ac7e-4c23-bc35-301b6f0400df/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 [2018-11-23 12:56:07,243 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-23 12:56:07,268 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-11-23 12:56:07,269 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 12:56:07,271 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 12:56:07,286 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-11-23 12:56:07,301 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 12:56:07,301 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-11-23 12:56:07,301 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-23 12:56:07,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-23 12:56:07,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2018-11-23 12:56:07,302 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 11 states. [2018-11-23 12:56:07,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 12:56:07,360 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2018-11-23 12:56:07,361 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-23 12:56:07,361 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2018-11-23 12:56:07,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 12:56:07,362 INFO L225 Difference]: With dead ends: 40 [2018-11-23 12:56:07,362 INFO L226 Difference]: Without dead ends: 36 [2018-11-23 12:56:07,362 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2018-11-23 12:56:07,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-11-23 12:56:07,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-11-23 12:56:07,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-11-23 12:56:07,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2018-11-23 12:56:07,367 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2018-11-23 12:56:07,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 12:56:07,367 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2018-11-23 12:56:07,367 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-23 12:56:07,367 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2018-11-23 12:56:07,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-11-23 12:56:07,368 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 12:56:07,368 INFO L402 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 12:56:07,368 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 12:56:07,368 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 12:56:07,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1532150511, now seen corresponding path program 7 times [2018-11-23 12:56:07,369 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 12:56:07,369 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 12:56:07,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:56:07,370 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 12:56:07,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:56:07,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 12:56:07,453 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-11-23 12:56:07,453 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 12:56:07,453 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8d673c10-ac7e-4c23-bc35-301b6f0400df/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 [2018-11-23 12:56:07,461 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 12:56:07,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 12:56:07,475 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 12:56:07,491 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-11-23 12:56:07,505 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 12:56:07,505 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-11-23 12:56:07,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-23 12:56:07,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-23 12:56:07,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2018-11-23 12:56:07,506 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 12 states. [2018-11-23 12:56:07,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 12:56:07,590 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2018-11-23 12:56:07,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-23 12:56:07,593 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2018-11-23 12:56:07,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 12:56:07,593 INFO L225 Difference]: With dead ends: 43 [2018-11-23 12:56:07,594 INFO L226 Difference]: Without dead ends: 39 [2018-11-23 12:56:07,594 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2018-11-23 12:56:07,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-11-23 12:56:07,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-11-23 12:56:07,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-11-23 12:56:07,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2018-11-23 12:56:07,598 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2018-11-23 12:56:07,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 12:56:07,600 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2018-11-23 12:56:07,600 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-23 12:56:07,600 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2018-11-23 12:56:07,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-11-23 12:56:07,601 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 12:56:07,601 INFO L402 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 12:56:07,601 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 12:56:07,602 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 12:56:07,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1140618237, now seen corresponding path program 8 times [2018-11-23 12:56:07,602 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 12:56:07,602 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 12:56:07,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:56:07,603 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 12:56:07,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:56:07,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 12:56:07,681 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-11-23 12:56:07,681 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 12:56:07,682 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8d673c10-ac7e-4c23-bc35-301b6f0400df/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 [2018-11-23 12:56:07,687 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-23 12:56:07,701 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-23 12:56:07,701 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 12:56:07,704 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 12:56:07,722 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-11-23 12:56:07,737 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 12:56:07,737 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-11-23 12:56:07,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-23 12:56:07,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-23 12:56:07,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2018-11-23 12:56:07,738 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 13 states. [2018-11-23 12:56:07,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 12:56:07,825 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2018-11-23 12:56:07,826 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-23 12:56:07,826 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2018-11-23 12:56:07,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 12:56:07,827 INFO L225 Difference]: With dead ends: 46 [2018-11-23 12:56:07,827 INFO L226 Difference]: Without dead ends: 42 [2018-11-23 12:56:07,827 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 [2018-11-23 12:56:07,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-11-23 12:56:07,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-11-23 12:56:07,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-11-23 12:56:07,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2018-11-23 12:56:07,831 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2018-11-23 12:56:07,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 12:56:07,832 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2018-11-23 12:56:07,832 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-23 12:56:07,832 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2018-11-23 12:56:07,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-11-23 12:56:07,832 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 12:56:07,833 INFO L402 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 12:56:07,833 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 12:56:07,833 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 12:56:07,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1749177617, now seen corresponding path program 9 times [2018-11-23 12:56:07,833 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 12:56:07,833 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 12:56:07,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:56:07,834 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 12:56:07,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:56:07,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 12:56:07,929 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-11-23 12:56:07,929 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 12:56:07,929 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8d673c10-ac7e-4c23-bc35-301b6f0400df/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 [2018-11-23 12:56:07,936 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-23 12:56:07,966 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-11-23 12:56:07,966 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 12:56:07,969 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 12:56:07,996 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-11-23 12:56:08,015 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 12:56:08,015 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-11-23 12:56:08,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-23 12:56:08,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-23 12:56:08,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2018-11-23 12:56:08,016 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 14 states. [2018-11-23 12:56:08,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 12:56:08,114 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2018-11-23 12:56:08,115 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-23 12:56:08,115 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 67 [2018-11-23 12:56:08,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 12:56:08,116 INFO L225 Difference]: With dead ends: 49 [2018-11-23 12:56:08,116 INFO L226 Difference]: Without dead ends: 45 [2018-11-23 12:56:08,117 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 [2018-11-23 12:56:08,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-11-23 12:56:08,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-11-23 12:56:08,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-11-23 12:56:08,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2018-11-23 12:56:08,122 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2018-11-23 12:56:08,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 12:56:08,122 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2018-11-23 12:56:08,122 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-23 12:56:08,123 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2018-11-23 12:56:08,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-11-23 12:56:08,123 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 12:56:08,123 INFO L402 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 12:56:08,124 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 12:56:08,124 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 12:56:08,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1580609155, now seen corresponding path program 10 times [2018-11-23 12:56:08,124 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 12:56:08,124 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 12:56:08,124 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:56:08,124 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 12:56:08,124 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:56:08,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 12:56:08,236 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2018-11-23 12:56:08,237 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 12:56:08,237 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8d673c10-ac7e-4c23-bc35-301b6f0400df/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 [2018-11-23 12:56:08,246 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-23 12:56:08,266 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-23 12:56:08,266 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 12:56:08,270 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 12:56:08,293 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2018-11-23 12:56:08,318 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 12:56:08,318 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-11-23 12:56:08,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-23 12:56:08,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-23 12:56:08,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2018-11-23 12:56:08,319 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 15 states. [2018-11-23 12:56:08,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 12:56:08,518 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2018-11-23 12:56:08,521 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-23 12:56:08,521 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 73 [2018-11-23 12:56:08,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 12:56:08,522 INFO L225 Difference]: With dead ends: 52 [2018-11-23 12:56:08,522 INFO L226 Difference]: Without dead ends: 48 [2018-11-23 12:56:08,523 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 [2018-11-23 12:56:08,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-11-23 12:56:08,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-11-23 12:56:08,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-11-23 12:56:08,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2018-11-23 12:56:08,527 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2018-11-23 12:56:08,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 12:56:08,528 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2018-11-23 12:56:08,528 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-23 12:56:08,528 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2018-11-23 12:56:08,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-11-23 12:56:08,529 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 12:56:08,529 INFO L402 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 12:56:08,529 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 12:56:08,529 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 12:56:08,529 INFO L82 PathProgramCache]: Analyzing trace with hash -223837457, now seen corresponding path program 11 times [2018-11-23 12:56:08,529 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 12:56:08,530 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 12:56:08,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:56:08,530 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 12:56:08,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:56:08,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 12:56:08,636 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2018-11-23 12:56:08,637 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 12:56:08,637 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8d673c10-ac7e-4c23-bc35-301b6f0400df/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 [2018-11-23 12:56:08,642 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-23 12:56:08,659 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-11-23 12:56:08,659 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 12:56:08,661 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 12:56:08,675 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2018-11-23 12:56:08,690 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 12:56:08,690 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-11-23 12:56:08,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-23 12:56:08,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-23 12:56:08,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2018-11-23 12:56:08,691 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 16 states. [2018-11-23 12:56:08,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 12:56:08,799 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2018-11-23 12:56:08,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-23 12:56:08,799 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 79 [2018-11-23 12:56:08,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 12:56:08,800 INFO L225 Difference]: With dead ends: 55 [2018-11-23 12:56:08,800 INFO L226 Difference]: Without dead ends: 51 [2018-11-23 12:56:08,800 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 [2018-11-23 12:56:08,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-11-23 12:56:08,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-11-23 12:56:08,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-11-23 12:56:08,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2018-11-23 12:56:08,804 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2018-11-23 12:56:08,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 12:56:08,804 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2018-11-23 12:56:08,804 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-23 12:56:08,804 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2018-11-23 12:56:08,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-11-23 12:56:08,805 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 12:56:08,805 INFO L402 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 12:56:08,805 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 12:56:08,806 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 12:56:08,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1653931773, now seen corresponding path program 12 times [2018-11-23 12:56:08,806 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 12:56:08,806 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 12:56:08,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:56:08,807 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 12:56:08,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:56:08,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 12:56:08,932 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-11-23 12:56:08,932 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 12:56:08,932 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8d673c10-ac7e-4c23-bc35-301b6f0400df/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 [2018-11-23 12:56:08,945 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-23 12:56:08,973 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-11-23 12:56:08,974 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 12:56:08,976 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 12:56:09,001 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-11-23 12:56:09,027 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 12:56:09,027 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-11-23 12:56:09,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-23 12:56:09,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-23 12:56:09,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2018-11-23 12:56:09,028 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 17 states. [2018-11-23 12:56:09,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 12:56:09,153 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2018-11-23 12:56:09,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-23 12:56:09,153 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 85 [2018-11-23 12:56:09,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 12:56:09,154 INFO L225 Difference]: With dead ends: 58 [2018-11-23 12:56:09,154 INFO L226 Difference]: Without dead ends: 54 [2018-11-23 12:56:09,154 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 [2018-11-23 12:56:09,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-11-23 12:56:09,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-11-23 12:56:09,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-11-23 12:56:09,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2018-11-23 12:56:09,157 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2018-11-23 12:56:09,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 12:56:09,157 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2018-11-23 12:56:09,157 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-23 12:56:09,158 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2018-11-23 12:56:09,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-11-23 12:56:09,158 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 12:56:09,158 INFO L402 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 12:56:09,158 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 12:56:09,158 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 12:56:09,159 INFO L82 PathProgramCache]: Analyzing trace with hash -218674449, now seen corresponding path program 13 times [2018-11-23 12:56:09,159 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 12:56:09,159 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 12:56:09,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:56:09,159 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 12:56:09,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:56:09,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 12:56:09,266 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2018-11-23 12:56:09,266 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 12:56:09,266 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8d673c10-ac7e-4c23-bc35-301b6f0400df/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 [2018-11-23 12:56:09,272 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 12:56:09,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 12:56:09,286 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 12:56:09,305 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2018-11-23 12:56:09,321 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 12:56:09,322 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-11-23 12:56:09,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-23 12:56:09,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-23 12:56:09,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2018-11-23 12:56:09,322 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 18 states. [2018-11-23 12:56:09,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 12:56:09,480 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2018-11-23 12:56:09,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-11-23 12:56:09,481 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 91 [2018-11-23 12:56:09,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 12:56:09,482 INFO L225 Difference]: With dead ends: 61 [2018-11-23 12:56:09,482 INFO L226 Difference]: Without dead ends: 57 [2018-11-23 12:56:09,483 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 [2018-11-23 12:56:09,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-11-23 12:56:09,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-11-23 12:56:09,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-11-23 12:56:09,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2018-11-23 12:56:09,487 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2018-11-23 12:56:09,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 12:56:09,487 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2018-11-23 12:56:09,487 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-23 12:56:09,487 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2018-11-23 12:56:09,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-11-23 12:56:09,490 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 12:56:09,490 INFO L402 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 12:56:09,491 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 12:56:09,491 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 12:56:09,491 INFO L82 PathProgramCache]: Analyzing trace with hash 492436605, now seen corresponding path program 14 times [2018-11-23 12:56:09,491 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 12:56:09,491 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 12:56:09,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:56:09,492 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 12:56:09,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:56:09,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 12:56:09,614 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2018-11-23 12:56:09,614 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 12:56:09,614 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8d673c10-ac7e-4c23-bc35-301b6f0400df/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 [2018-11-23 12:56:09,621 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-23 12:56:09,637 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-23 12:56:09,637 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 12:56:09,639 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 12:56:09,656 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2018-11-23 12:56:09,681 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 12:56:09,681 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-11-23 12:56:09,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-11-23 12:56:09,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-11-23 12:56:09,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2018-11-23 12:56:09,682 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 19 states. [2018-11-23 12:56:09,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 12:56:09,826 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2018-11-23 12:56:09,826 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-23 12:56:09,826 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 97 [2018-11-23 12:56:09,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 12:56:09,826 INFO L225 Difference]: With dead ends: 64 [2018-11-23 12:56:09,826 INFO L226 Difference]: Without dead ends: 60 [2018-11-23 12:56:09,827 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=410, Invalid=712, Unknown=0, NotChecked=0, Total=1122 [2018-11-23 12:56:09,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-11-23 12:56:09,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-11-23 12:56:09,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-11-23 12:56:09,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2018-11-23 12:56:09,832 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2018-11-23 12:56:09,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 12:56:09,833 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2018-11-23 12:56:09,834 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-11-23 12:56:09,834 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2018-11-23 12:56:09,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-11-23 12:56:09,834 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 12:56:09,834 INFO L402 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 12:56:09,835 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 12:56:09,835 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 12:56:09,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1083048687, now seen corresponding path program 15 times [2018-11-23 12:56:09,835 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 12:56:09,835 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 12:56:09,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:56:09,836 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 12:56:09,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:56:09,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 12:56:09,959 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2018-11-23 12:56:09,959 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 12:56:09,959 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8d673c10-ac7e-4c23-bc35-301b6f0400df/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 [2018-11-23 12:56:09,974 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-23 12:56:09,994 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-11-23 12:56:09,994 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 12:56:09,996 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 12:56:10,013 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2018-11-23 12:56:10,028 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 12:56:10,028 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-11-23 12:56:10,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-23 12:56:10,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-23 12:56:10,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=223, Unknown=0, NotChecked=0, Total=380 [2018-11-23 12:56:10,029 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 20 states. [2018-11-23 12:56:10,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 12:56:10,189 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2018-11-23 12:56:10,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-11-23 12:56:10,189 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 103 [2018-11-23 12:56:10,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 12:56:10,189 INFO L225 Difference]: With dead ends: 67 [2018-11-23 12:56:10,189 INFO L226 Difference]: Without dead ends: 63 [2018-11-23 12:56:10,190 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 [2018-11-23 12:56:10,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-11-23 12:56:10,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-11-23 12:56:10,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-11-23 12:56:10,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2018-11-23 12:56:10,193 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 103 [2018-11-23 12:56:10,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 12:56:10,193 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2018-11-23 12:56:10,193 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-23 12:56:10,193 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2018-11-23 12:56:10,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-11-23 12:56:10,194 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 12:56:10,194 INFO L402 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 12:56:10,194 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 12:56:10,194 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 12:56:10,194 INFO L82 PathProgramCache]: Analyzing trace with hash 404015613, now seen corresponding path program 16 times [2018-11-23 12:56:10,194 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 12:56:10,194 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 12:56:10,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:56:10,195 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 12:56:10,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:56:10,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 12:56:10,400 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2018-11-23 12:56:10,400 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 12:56:10,400 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8d673c10-ac7e-4c23-bc35-301b6f0400df/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 [2018-11-23 12:56:10,424 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-23 12:56:10,444 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-23 12:56:10,444 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 12:56:10,446 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 12:56:10,470 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2018-11-23 12:56:10,492 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 12:56:10,492 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-11-23 12:56:10,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-23 12:56:10,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-23 12:56:10,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=245, Unknown=0, NotChecked=0, Total=420 [2018-11-23 12:56:10,493 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 21 states. [2018-11-23 12:56:10,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 12:56:10,659 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2018-11-23 12:56:10,659 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-11-23 12:56:10,659 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 109 [2018-11-23 12:56:10,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 12:56:10,660 INFO L225 Difference]: With dead ends: 70 [2018-11-23 12:56:10,660 INFO L226 Difference]: Without dead ends: 66 [2018-11-23 12:56:10,661 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 [2018-11-23 12:56:10,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-11-23 12:56:10,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-11-23 12:56:10,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-11-23 12:56:10,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2018-11-23 12:56:10,664 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 109 [2018-11-23 12:56:10,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 12:56:10,665 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2018-11-23 12:56:10,665 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-23 12:56:10,665 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2018-11-23 12:56:10,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-11-23 12:56:10,665 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 12:56:10,666 INFO L402 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 12:56:10,666 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 12:56:10,666 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 12:56:10,666 INFO L82 PathProgramCache]: Analyzing trace with hash -464475409, now seen corresponding path program 17 times [2018-11-23 12:56:10,666 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 12:56:10,666 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 12:56:10,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:56:10,667 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 12:56:10,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:56:10,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 12:56:10,808 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2018-11-23 12:56:10,808 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 12:56:10,808 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8d673c10-ac7e-4c23-bc35-301b6f0400df/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 [2018-11-23 12:56:10,815 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-23 12:56:10,840 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-11-23 12:56:10,841 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 12:56:10,843 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 12:56:10,861 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2018-11-23 12:56:10,876 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 12:56:10,877 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-11-23 12:56:10,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-11-23 12:56:10,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-11-23 12:56:10,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=268, Unknown=0, NotChecked=0, Total=462 [2018-11-23 12:56:10,877 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 22 states. [2018-11-23 12:56:11,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 12:56:11,078 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2018-11-23 12:56:11,078 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-11-23 12:56:11,078 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 115 [2018-11-23 12:56:11,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 12:56:11,079 INFO L225 Difference]: With dead ends: 73 [2018-11-23 12:56:11,079 INFO L226 Difference]: Without dead ends: 69 [2018-11-23 12:56:11,079 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 [2018-11-23 12:56:11,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-11-23 12:56:11,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-11-23 12:56:11,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-11-23 12:56:11,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2018-11-23 12:56:11,082 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 115 [2018-11-23 12:56:11,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 12:56:11,082 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2018-11-23 12:56:11,082 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-11-23 12:56:11,082 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2018-11-23 12:56:11,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-11-23 12:56:11,082 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 12:56:11,082 INFO L402 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 12:56:11,082 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 12:56:11,083 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 12:56:11,083 INFO L82 PathProgramCache]: Analyzing trace with hash 130115453, now seen corresponding path program 18 times [2018-11-23 12:56:11,083 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 12:56:11,083 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 12:56:11,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:56:11,083 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 12:56:11,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:56:11,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 12:56:11,243 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2018-11-23 12:56:11,243 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 12:56:11,243 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8d673c10-ac7e-4c23-bc35-301b6f0400df/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 [2018-11-23 12:56:11,249 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-23 12:56:11,277 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-11-23 12:56:11,277 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 12:56:11,280 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 12:56:11,307 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2018-11-23 12:56:11,322 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 12:56:11,322 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-11-23 12:56:11,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-11-23 12:56:11,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-11-23 12:56:11,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=292, Unknown=0, NotChecked=0, Total=506 [2018-11-23 12:56:11,323 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 23 states. [2018-11-23 12:56:11,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 12:56:11,522 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2018-11-23 12:56:11,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-11-23 12:56:11,522 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 121 [2018-11-23 12:56:11,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 12:56:11,523 INFO L225 Difference]: With dead ends: 76 [2018-11-23 12:56:11,523 INFO L226 Difference]: Without dead ends: 72 [2018-11-23 12:56:11,524 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 [2018-11-23 12:56:11,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-11-23 12:56:11,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-11-23 12:56:11,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-11-23 12:56:11,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2018-11-23 12:56:11,528 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 121 [2018-11-23 12:56:11,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 12:56:11,528 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2018-11-23 12:56:11,528 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-11-23 12:56:11,528 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2018-11-23 12:56:11,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-11-23 12:56:11,529 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 12:56:11,529 INFO L402 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 12:56:11,529 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 12:56:11,529 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 12:56:11,529 INFO L82 PathProgramCache]: Analyzing trace with hash -2010955025, now seen corresponding path program 19 times [2018-11-23 12:56:11,529 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 12:56:11,529 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 12:56:11,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:56:11,530 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 12:56:11,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:56:11,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 12:56:11,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2018-11-23 12:56:11,744 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 12:56:11,744 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8d673c10-ac7e-4c23-bc35-301b6f0400df/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 [2018-11-23 12:56:11,750 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 12:56:11,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 12:56:11,771 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 12:56:11,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2018-11-23 12:56:11,816 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 12:56:11,816 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-11-23 12:56:11,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-11-23 12:56:11,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-11-23 12:56:11,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=317, Unknown=0, NotChecked=0, Total=552 [2018-11-23 12:56:11,817 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 24 states. [2018-11-23 12:56:12,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 12:56:12,044 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2018-11-23 12:56:12,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-11-23 12:56:12,045 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 127 [2018-11-23 12:56:12,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 12:56:12,046 INFO L225 Difference]: With dead ends: 79 [2018-11-23 12:56:12,046 INFO L226 Difference]: Without dead ends: 75 [2018-11-23 12:56:12,046 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 [2018-11-23 12:56:12,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-11-23 12:56:12,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-11-23 12:56:12,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-11-23 12:56:12,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2018-11-23 12:56:12,049 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 127 [2018-11-23 12:56:12,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 12:56:12,049 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2018-11-23 12:56:12,049 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-11-23 12:56:12,049 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2018-11-23 12:56:12,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-11-23 12:56:12,050 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 12:56:12,050 INFO L402 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 12:56:12,050 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 12:56:12,050 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 12:56:12,051 INFO L82 PathProgramCache]: Analyzing trace with hash -799288067, now seen corresponding path program 20 times [2018-11-23 12:56:12,051 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 12:56:12,051 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 12:56:12,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:56:12,051 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 12:56:12,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:56:12,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 12:56:12,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2018-11-23 12:56:12,234 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 12:56:12,234 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8d673c10-ac7e-4c23-bc35-301b6f0400df/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 [2018-11-23 12:56:12,240 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-23 12:56:12,262 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-23 12:56:12,262 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 12:56:12,264 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 12:56:12,290 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2018-11-23 12:56:12,305 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 12:56:12,306 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-11-23 12:56:12,306 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-11-23 12:56:12,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-11-23 12:56:12,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=343, Unknown=0, NotChecked=0, Total=600 [2018-11-23 12:56:12,307 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 25 states. [2018-11-23 12:56:12,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 12:56:12,533 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2018-11-23 12:56:12,533 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-11-23 12:56:12,533 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 133 [2018-11-23 12:56:12,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 12:56:12,534 INFO L225 Difference]: With dead ends: 82 [2018-11-23 12:56:12,534 INFO L226 Difference]: Without dead ends: 78 [2018-11-23 12:56:12,534 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 [2018-11-23 12:56:12,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-11-23 12:56:12,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-11-23 12:56:12,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-11-23 12:56:12,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2018-11-23 12:56:12,538 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 133 [2018-11-23 12:56:12,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 12:56:12,538 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2018-11-23 12:56:12,538 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-11-23 12:56:12,538 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2018-11-23 12:56:12,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2018-11-23 12:56:12,539 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 12:56:12,539 INFO L402 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 12:56:12,539 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 12:56:12,539 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 12:56:12,539 INFO L82 PathProgramCache]: Analyzing trace with hash -1226192145, now seen corresponding path program 21 times [2018-11-23 12:56:12,540 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 12:56:12,540 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 12:56:12,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:56:12,540 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 12:56:12,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:56:12,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 12:56:12,776 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2018-11-23 12:56:12,777 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 12:56:12,777 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8d673c10-ac7e-4c23-bc35-301b6f0400df/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 [2018-11-23 12:56:12,783 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-23 12:56:12,814 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-11-23 12:56:12,814 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 12:56:12,817 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 12:56:12,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2018-11-23 12:56:12,862 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 12:56:12,863 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-11-23 12:56:12,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-11-23 12:56:12,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-11-23 12:56:12,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=370, Unknown=0, NotChecked=0, Total=650 [2018-11-23 12:56:12,863 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 26 states. [2018-11-23 12:56:13,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 12:56:13,107 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2018-11-23 12:56:13,107 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-11-23 12:56:13,107 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 139 [2018-11-23 12:56:13,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 12:56:13,108 INFO L225 Difference]: With dead ends: 85 [2018-11-23 12:56:13,108 INFO L226 Difference]: Without dead ends: 81 [2018-11-23 12:56:13,109 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 [2018-11-23 12:56:13,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-11-23 12:56:13,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-11-23 12:56:13,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-11-23 12:56:13,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2018-11-23 12:56:13,112 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 139 [2018-11-23 12:56:13,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 12:56:13,113 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2018-11-23 12:56:13,113 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-11-23 12:56:13,113 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2018-11-23 12:56:13,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2018-11-23 12:56:13,114 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 12:56:13,114 INFO L402 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 12:56:13,114 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 12:56:13,114 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 12:56:13,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1155535485, now seen corresponding path program 22 times [2018-11-23 12:56:13,114 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 12:56:13,114 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 12:56:13,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:56:13,115 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 12:56:13,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:56:13,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 12:56:13,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2018-11-23 12:56:13,360 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 12:56:13,360 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8d673c10-ac7e-4c23-bc35-301b6f0400df/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 [2018-11-23 12:56:13,368 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-23 12:56:13,397 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-23 12:56:13,398 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 12:56:13,401 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 12:56:13,424 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2018-11-23 12:56:13,439 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 12:56:13,439 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-11-23 12:56:13,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-11-23 12:56:13,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-11-23 12:56:13,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=398, Unknown=0, NotChecked=0, Total=702 [2018-11-23 12:56:13,440 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 27 states. [2018-11-23 12:56:13,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 12:56:13,686 INFO L93 Difference]: Finished difference Result 88 states and 89 transitions. [2018-11-23 12:56:13,686 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-11-23 12:56:13,686 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 145 [2018-11-23 12:56:13,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 12:56:13,687 INFO L225 Difference]: With dead ends: 88 [2018-11-23 12:56:13,687 INFO L226 Difference]: Without dead ends: 84 [2018-11-23 12:56:13,688 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 [2018-11-23 12:56:13,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-11-23 12:56:13,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-11-23 12:56:13,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-11-23 12:56:13,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2018-11-23 12:56:13,691 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 145 [2018-11-23 12:56:13,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 12:56:13,691 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2018-11-23 12:56:13,691 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-11-23 12:56:13,691 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2018-11-23 12:56:13,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2018-11-23 12:56:13,692 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 12:56:13,692 INFO L402 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 12:56:13,692 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 12:56:13,692 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 12:56:13,693 INFO L82 PathProgramCache]: Analyzing trace with hash 478692079, now seen corresponding path program 23 times [2018-11-23 12:56:13,693 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 12:56:13,693 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 12:56:13,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:56:13,693 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 12:56:13,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:56:13,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 12:56:13,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2018-11-23 12:56:13,911 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 12:56:13,911 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8d673c10-ac7e-4c23-bc35-301b6f0400df/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 [2018-11-23 12:56:13,917 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-23 12:56:13,954 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-11-23 12:56:13,954 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 12:56:13,957 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 12:56:14,002 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2018-11-23 12:56:14,018 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 12:56:14,018 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-11-23 12:56:14,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-11-23 12:56:14,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-11-23 12:56:14,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=427, Unknown=0, NotChecked=0, Total=756 [2018-11-23 12:56:14,019 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand 28 states. [2018-11-23 12:56:14,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 12:56:14,325 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2018-11-23 12:56:14,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-11-23 12:56:14,325 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 151 [2018-11-23 12:56:14,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 12:56:14,326 INFO L225 Difference]: With dead ends: 91 [2018-11-23 12:56:14,326 INFO L226 Difference]: Without dead ends: 87 [2018-11-23 12:56:14,327 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=977, Invalid=1675, Unknown=0, NotChecked=0, Total=2652 [2018-11-23 12:56:14,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-11-23 12:56:14,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-11-23 12:56:14,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-11-23 12:56:14,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2018-11-23 12:56:14,330 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 151 [2018-11-23 12:56:14,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 12:56:14,330 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2018-11-23 12:56:14,331 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-11-23 12:56:14,331 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2018-11-23 12:56:14,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2018-11-23 12:56:14,331 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 12:56:14,331 INFO L402 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 12:56:14,332 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 12:56:14,332 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 12:56:14,332 INFO L82 PathProgramCache]: Analyzing trace with hash -414572547, now seen corresponding path program 24 times [2018-11-23 12:56:14,332 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 12:56:14,332 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 12:56:14,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:56:14,337 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 12:56:14,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:56:14,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 12:56:14,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2018-11-23 12:56:14,584 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 12:56:14,584 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8d673c10-ac7e-4c23-bc35-301b6f0400df/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 [2018-11-23 12:56:14,589 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-23 12:56:14,658 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-11-23 12:56:14,658 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 12:56:14,662 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 12:56:14,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2018-11-23 12:56:14,730 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 12:56:14,730 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-11-23 12:56:14,730 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-11-23 12:56:14,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-11-23 12:56:14,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=457, Unknown=0, NotChecked=0, Total=812 [2018-11-23 12:56:14,731 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 29 states. [2018-11-23 12:56:15,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 12:56:15,012 INFO L93 Difference]: Finished difference Result 94 states and 95 transitions. [2018-11-23 12:56:15,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-11-23 12:56:15,012 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 157 [2018-11-23 12:56:15,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 12:56:15,013 INFO L225 Difference]: With dead ends: 94 [2018-11-23 12:56:15,013 INFO L226 Difference]: Without dead ends: 90 [2018-11-23 12:56:15,014 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 [2018-11-23 12:56:15,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-11-23 12:56:15,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-11-23 12:56:15,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-11-23 12:56:15,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2018-11-23 12:56:15,017 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 157 [2018-11-23 12:56:15,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 12:56:15,017 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2018-11-23 12:56:15,017 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-11-23 12:56:15,017 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2018-11-23 12:56:15,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2018-11-23 12:56:15,018 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 12:56:15,018 INFO L402 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 12:56:15,018 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 12:56:15,018 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 12:56:15,019 INFO L82 PathProgramCache]: Analyzing trace with hash -975000849, now seen corresponding path program 25 times [2018-11-23 12:56:15,019 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 12:56:15,019 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 12:56:15,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:56:15,019 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 12:56:15,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:56:15,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 12:56:15,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2018-11-23 12:56:15,993 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 12:56:15,993 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8d673c10-ac7e-4c23-bc35-301b6f0400df/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 [2018-11-23 12:56:16,000 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 12:56:16,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 12:56:16,029 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 12:56:16,110 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2018-11-23 12:56:16,126 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 12:56:16,126 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-11-23 12:56:16,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-11-23 12:56:16,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-11-23 12:56:16,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2018-11-23 12:56:16,127 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand 55 states. [2018-11-23 12:56:16,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 12:56:16,781 INFO L93 Difference]: Finished difference Result 97 states and 98 transitions. [2018-11-23 12:56:16,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-11-23 12:56:16,782 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 163 [2018-11-23 12:56:16,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 12:56:16,783 INFO L225 Difference]: With dead ends: 97 [2018-11-23 12:56:16,783 INFO L226 Difference]: Without dead ends: 93 [2018-11-23 12:56:16,783 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 162 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2018-11-23 12:56:16,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-11-23 12:56:16,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-11-23 12:56:16,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-11-23 12:56:16,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2018-11-23 12:56:16,786 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 163 [2018-11-23 12:56:16,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 12:56:16,787 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2018-11-23 12:56:16,787 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-11-23 12:56:16,787 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2018-11-23 12:56:16,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2018-11-23 12:56:16,788 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 12:56:16,788 INFO L402 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 12:56:16,788 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 12:56:16,788 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 12:56:16,788 INFO L82 PathProgramCache]: Analyzing trace with hash -1466565251, now seen corresponding path program 26 times [2018-11-23 12:56:16,788 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 12:56:16,788 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 12:56:16,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:56:16,789 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 12:56:16,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:56:16,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 12:56:17,096 INFO L134 CoverageAnalysis]: Checked inductivity of 2054 backedges. 1027 proven. 0 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2018-11-23 12:56:17,096 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-23 12:56:17,096 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2018-11-23 12:56:17,097 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-11-23 12:56:17,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-11-23 12:56:17,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=410, Invalid=520, Unknown=0, NotChecked=0, Total=930 [2018-11-23 12:56:17,097 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand 31 states. [2018-11-23 12:56:17,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 12:56:17,307 INFO L93 Difference]: Finished difference Result 93 states and 94 transitions. [2018-11-23 12:56:17,307 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-11-23 12:56:17,307 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 169 [2018-11-23 12:56:17,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 12:56:17,307 INFO L225 Difference]: With dead ends: 93 [2018-11-23 12:56:17,308 INFO L226 Difference]: Without dead ends: 0 [2018-11-23 12:56:17,309 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1220, Invalid=2086, Unknown=0, NotChecked=0, Total=3306 [2018-11-23 12:56:17,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-23 12:56:17,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-23 12:56:17,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-23 12:56:17,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-23 12:56:17,309 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 169 [2018-11-23 12:56:17,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 12:56:17,309 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-23 12:56:17,309 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-11-23 12:56:17,310 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-23 12:56:17,310 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-23 12:56:17,313 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-23 12:56:17,333 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-23 12:56:17,333 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-23 12:56:17,333 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-23 12:56:17,333 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-23 12:56:17,333 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-23 12:56:17,333 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-23 12:56:17,333 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 9 15) the Hoare annotation is: true [2018-11-23 12:56:17,333 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 9 15) no Hoare annotation was computed. [2018-11-23 12:56:17,334 INFO L448 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2018-11-23 12:56:17,334 INFO L448 ceAbstractionStarter]: For program point L13(line 13) no Hoare annotation was computed. [2018-11-23 12:56:17,334 INFO L448 ceAbstractionStarter]: For program point L12(lines 12 14) no Hoare annotation was computed. [2018-11-23 12:56:17,334 INFO L444 ceAbstractionStarter]: At program point L11(line 11) the Hoare annotation is: (and (<= main_~input~0 25) (<= 25 main_~input~0)) [2018-11-23 12:56:17,334 INFO L448 ceAbstractionStarter]: For program point L11-1(line 11) no Hoare annotation was computed. [2018-11-23 12:56:17,334 INFO L448 ceAbstractionStarter]: For program point L12-2(lines 9 15) no Hoare annotation was computed. [2018-11-23 12:56:17,334 INFO L448 ceAbstractionStarter]: For program point idFINAL(lines 4 7) no Hoare annotation was computed. [2018-11-23 12:56:17,334 INFO L448 ceAbstractionStarter]: For program point idEXIT(lines 4 7) no Hoare annotation was computed. [2018-11-23 12:56:17,334 INFO L451 ceAbstractionStarter]: At program point idENTRY(lines 4 7) the Hoare annotation is: true [2018-11-23 12:56:17,334 INFO L444 ceAbstractionStarter]: At program point L6(line 6) the Hoare annotation is: (and (<= |id_#in~x| id_~x) (<= id_~x |id_#in~x|)) [2018-11-23 12:56:17,334 INFO L448 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-11-23 12:56:17,334 INFO L448 ceAbstractionStarter]: For program point L6-1(line 6) no Hoare annotation was computed. [2018-11-23 12:56:17,337 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 12:56:17 BoogieIcfgContainer [2018-11-23 12:56:17,337 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-23 12:56:17,337 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-23 12:56:17,337 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-23 12:56:17,337 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-23 12:56:17,338 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 12:56:05" (3/4) ... [2018-11-23 12:56:17,341 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-23 12:56:17,347 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-23 12:56:17,347 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-23 12:56:17,347 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure id [2018-11-23 12:56:17,350 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-11-23 12:56:17,350 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-11-23 12:56:17,351 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-23 12:56:17,377 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_8d673c10-ac7e-4c23-bc35-301b6f0400df/bin-2019/uautomizer/witness.graphml [2018-11-23 12:56:17,377 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-23 12:56:17,377 INFO L168 Benchmark]: Toolchain (without parser) took 11881.46 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 333.4 MB). Free memory was 959.3 MB in the beginning and 1.2 GB in the end (delta: -251.3 MB). Peak memory consumption was 82.2 MB. Max. memory is 11.5 GB. [2018-11-23 12:56:17,378 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 1.0 GB. Free memory is still 985.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-23 12:56:17,379 INFO L168 Benchmark]: CACSL2BoogieTranslator took 138.22 ms. Allocated memory is still 1.0 GB. Free memory was 959.3 MB in the beginning and 948.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-23 12:56:17,379 INFO L168 Benchmark]: Boogie Procedure Inliner took 16.92 ms. Allocated memory is still 1.0 GB. Free memory is still 948.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-23 12:56:17,379 INFO L168 Benchmark]: Boogie Preprocessor took 14.46 ms. Allocated memory is still 1.0 GB. Free memory was 948.5 MB in the beginning and 945.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-23 12:56:17,379 INFO L168 Benchmark]: RCFGBuilder took 178.87 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 130.0 MB). Free memory was 945.8 MB in the beginning and 1.1 GB in the end (delta: -172.7 MB). Peak memory consumption was 14.3 MB. Max. memory is 11.5 GB. [2018-11-23 12:56:17,380 INFO L168 Benchmark]: TraceAbstraction took 11490.08 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 203.4 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -101.7 MB). Peak memory consumption was 101.7 MB. Max. memory is 11.5 GB. [2018-11-23 12:56:17,380 INFO L168 Benchmark]: Witness Printer took 39.85 ms. Allocated memory is still 1.4 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. [2018-11-23 12:56:17,382 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 1.0 GB. Free memory is still 985.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 138.22 ms. Allocated memory is still 1.0 GB. Free memory was 959.3 MB in the beginning and 948.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 16.92 ms. Allocated memory is still 1.0 GB. Free memory is still 948.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 14.46 ms. Allocated memory is still 1.0 GB. Free memory was 948.5 MB in the beginning and 945.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 178.87 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 130.0 MB). Free memory was 945.8 MB in the beginning and 1.1 GB in the end (delta: -172.7 MB). Peak memory consumption was 14.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 11490.08 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 203.4 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -101.7 MB). Peak memory consumption was 101.7 MB. Max. memory is 11.5 GB. * Witness Printer took 39.85 ms. Allocated memory is still 1.4 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: 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, 11.4s OverallTime, 27 OverallIterations, 27 TraceHistogramMax, 4.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 455 SDtfs, 782 SDslu, 5842 SDs, 0 SdLazy, 3921 SolverSat, 36 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3439 GetRequests, 2628 SyntacticMatches, 2 SemanticMatches, 809 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2925 ImplicationChecksByTransitivity, 6.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=93occurred in iteration=26, 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, 27 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 9 PreInvPairs, 9 NumberOfFragments, 19 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 4.8s InterpolantComputationTime, 4732 NumberOfCodeBlocks, 4732 NumberOfCodeBlocksAsserted, 224 NumberOfCheckSat, 4680 ConstructedInterpolants, 0 QuantifiedInterpolants, 1419072 SizeOfPredicates, 349 NumberOfNonLiveVariables, 5325 ConjunctsInSsa, 803 ConjunctsInUnsatCore, 52 InterpolantComputations, 2 PerfectInterpolantSequences, 18954/35854 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...