./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/recursive-simple/id_o20_false-unreach-call_true-termination_true-no-overflow.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 1dbac8bc Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_5f656a8b-54bd-44b7-81fd-70c10473fe9a/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_5f656a8b-54bd-44b7-81fd-70c10473fe9a/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_5f656a8b-54bd-44b7-81fd-70c10473fe9a/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_5f656a8b-54bd-44b7-81fd-70c10473fe9a/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/id_o20_false-unreach-call_true-termination_true-no-overflow.c -s /tmp/vcloud-vcloud-master/worker/working_dir_5f656a8b-54bd-44b7-81fd-70c10473fe9a/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_5f656a8b-54bd-44b7-81fd-70c10473fe9a/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 d1286ba4e4f9d6c67aa5e4ab5d636bfd3afce4b1 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.23-1dbac8b [2018-11-10 10:25:19,852 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-10 10:25:19,853 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-10 10:25:19,860 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-10 10:25:19,860 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-10 10:25:19,861 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-10 10:25:19,862 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-10 10:25:19,863 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-10 10:25:19,864 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-10 10:25:19,865 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-10 10:25:19,865 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-10 10:25:19,865 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-10 10:25:19,866 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-10 10:25:19,866 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-10 10:25:19,867 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-10 10:25:19,868 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-10 10:25:19,868 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-10 10:25:19,869 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-10 10:25:19,871 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-10 10:25:19,872 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-10 10:25:19,872 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-10 10:25:19,873 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-10 10:25:19,875 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-10 10:25:19,875 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-10 10:25:19,875 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-10 10:25:19,875 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-10 10:25:19,876 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-10 10:25:19,877 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-10 10:25:19,877 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-10 10:25:19,878 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-10 10:25:19,878 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-10 10:25:19,879 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-10 10:25:19,879 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-10 10:25:19,879 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-10 10:25:19,880 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-10 10:25:19,880 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-10 10:25:19,880 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_5f656a8b-54bd-44b7-81fd-70c10473fe9a/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-11-10 10:25:19,890 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-10 10:25:19,890 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-10 10:25:19,890 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-10 10:25:19,891 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-11-10 10:25:19,891 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-10 10:25:19,891 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-10 10:25:19,891 INFO L133 SettingsManager]: * Use SBE=true [2018-11-10 10:25:19,891 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-10 10:25:19,891 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-10 10:25:19,892 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-10 10:25:19,892 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-10 10:25:19,892 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-10 10:25:19,892 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-10 10:25:19,892 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-10 10:25:19,892 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-10 10:25:19,892 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-10 10:25:19,892 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-10 10:25:19,893 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-10 10:25:19,893 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-10 10:25:19,893 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-10 10:25:19,893 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-10 10:25:19,893 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-10 10:25:19,893 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-10 10:25:19,893 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-10 10:25:19,893 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-10 10:25:19,894 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-10 10:25:19,894 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-10 10:25:19,894 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-10 10:25:19,894 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-10 10:25:19,894 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_5f656a8b-54bd-44b7-81fd-70c10473fe9a/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 -> d1286ba4e4f9d6c67aa5e4ab5d636bfd3afce4b1 [2018-11-10 10:25:19,915 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-10 10:25:19,922 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-10 10:25:19,924 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-10 10:25:19,924 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-10 10:25:19,925 INFO L276 PluginConnector]: CDTParser initialized [2018-11-10 10:25:19,925 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_5f656a8b-54bd-44b7-81fd-70c10473fe9a/bin-2019/uautomizer/../../sv-benchmarks/c/recursive-simple/id_o20_false-unreach-call_true-termination_true-no-overflow.c [2018-11-10 10:25:19,968 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_5f656a8b-54bd-44b7-81fd-70c10473fe9a/bin-2019/uautomizer/data/ea77167ed/05704473339440df953f9e473cae2ae6/FLAGcc08525a2 [2018-11-10 10:25:20,346 INFO L298 CDTParser]: Found 1 translation units. [2018-11-10 10:25:20,347 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_5f656a8b-54bd-44b7-81fd-70c10473fe9a/sv-benchmarks/c/recursive-simple/id_o20_false-unreach-call_true-termination_true-no-overflow.c [2018-11-10 10:25:20,350 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_5f656a8b-54bd-44b7-81fd-70c10473fe9a/bin-2019/uautomizer/data/ea77167ed/05704473339440df953f9e473cae2ae6/FLAGcc08525a2 [2018-11-10 10:25:20,359 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_5f656a8b-54bd-44b7-81fd-70c10473fe9a/bin-2019/uautomizer/data/ea77167ed/05704473339440df953f9e473cae2ae6 [2018-11-10 10:25:20,361 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-10 10:25:20,362 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-10 10:25:20,363 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-10 10:25:20,363 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-10 10:25:20,365 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-10 10:25:20,366 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 10:25:20" (1/1) ... [2018-11-10 10:25:20,368 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b8b0baa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:25:20, skipping insertion in model container [2018-11-10 10:25:20,368 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 10:25:20" (1/1) ... [2018-11-10 10:25:20,373 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-10 10:25:20,383 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-10 10:25:20,475 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 10:25:20,477 INFO L189 MainTranslator]: Completed pre-run [2018-11-10 10:25:20,485 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 10:25:20,495 INFO L193 MainTranslator]: Completed translation [2018-11-10 10:25:20,495 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:25:20 WrapperNode [2018-11-10 10:25:20,495 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-10 10:25:20,495 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-10 10:25:20,496 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-10 10:25:20,496 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-10 10:25:20,503 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:25:20" (1/1) ... [2018-11-10 10:25:20,503 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:25:20" (1/1) ... [2018-11-10 10:25:20,507 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:25:20" (1/1) ... [2018-11-10 10:25:20,507 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:25:20" (1/1) ... [2018-11-10 10:25:20,509 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:25:20" (1/1) ... [2018-11-10 10:25:20,510 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:25:20" (1/1) ... [2018-11-10 10:25:20,510 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:25:20" (1/1) ... [2018-11-10 10:25:20,511 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-10 10:25:20,511 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-10 10:25:20,511 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-10 10:25:20,511 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-10 10:25:20,512 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:25:20" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5f656a8b-54bd-44b7-81fd-70c10473fe9a/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 [2018-11-10 10:25:20,586 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-10 10:25:20,586 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-10 10:25:20,586 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2018-11-10 10:25:20,586 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-10 10:25:20,587 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2018-11-10 10:25:20,587 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-11-10 10:25:20,587 INFO L130 BoogieDeclarations]: Found specification of procedure id [2018-11-10 10:25:20,587 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-10 10:25:20,587 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-10 10:25:20,587 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-10 10:25:20,681 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-10 10:25:20,682 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 10:25:20 BoogieIcfgContainer [2018-11-10 10:25:20,682 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-10 10:25:20,682 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-10 10:25:20,682 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-10 10:25:20,685 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-10 10:25:20,685 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 10:25:20" (1/3) ... [2018-11-10 10:25:20,686 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fb96d47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 10:25:20, skipping insertion in model container [2018-11-10 10:25:20,686 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:25:20" (2/3) ... [2018-11-10 10:25:20,686 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fb96d47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 10:25:20, skipping insertion in model container [2018-11-10 10:25:20,686 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 10:25:20" (3/3) ... [2018-11-10 10:25:20,688 INFO L112 eAbstractionObserver]: Analyzing ICFG id_o20_false-unreach-call_true-termination_true-no-overflow.c [2018-11-10 10:25:20,695 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-10 10:25:20,701 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-10 10:25:20,714 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-10 10:25:20,737 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-11-10 10:25:20,738 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-10 10:25:20,738 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-10 10:25:20,738 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-10 10:25:20,738 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-10 10:25:20,738 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-10 10:25:20,738 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-10 10:25:20,738 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-10 10:25:20,739 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-10 10:25:20,752 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2018-11-10 10:25:20,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-10 10:25:20,756 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:25:20,757 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 10:25:20,759 INFO L424 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 10:25:20,763 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:25:20,764 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2018-11-10 10:25:20,765 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 10:25:20,766 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 10:25:20,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:25:20,803 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 10:25:20,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:25:20,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:25:20,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 10:25:20,895 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 10:25:20,895 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-10 10:25:20,898 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-10 10:25:20,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-10 10:25:20,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-10 10:25:20,908 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2018-11-10 10:25:20,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 10:25:20,946 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2018-11-10 10:25:20,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-10 10:25:20,947 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-11-10 10:25:20,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 10:25:20,953 INFO L225 Difference]: With dead ends: 32 [2018-11-10 10:25:20,953 INFO L226 Difference]: Without dead ends: 18 [2018-11-10 10:25:20,955 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-10 10:25:20,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-11-10 10:25:20,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-11-10 10:25:20,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-11-10 10:25:20,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2018-11-10 10:25:20,980 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2018-11-10 10:25:20,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 10:25:20,981 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2018-11-10 10:25:20,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-10 10:25:20,981 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2018-11-10 10:25:20,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-11-10 10:25:20,982 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:25:20,982 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 10:25:20,983 INFO L424 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 10:25:20,983 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:25:20,984 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2018-11-10 10:25:20,984 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 10:25:20,984 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 10:25:20,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:25:20,985 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 10:25:20,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:25:20,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:25:21,079 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-10 10:25:21,080 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 10:25:21,080 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5f656a8b-54bd-44b7-81fd-70c10473fe9a/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 [2018-11-10 10:25:21,088 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 10:25:21,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:25:21,101 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 10:25:21,131 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-10 10:25:21,147 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 10:25:21,147 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-11-10 10:25:21,148 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-10 10:25:21,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-10 10:25:21,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-11-10 10:25:21,148 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 7 states. [2018-11-10 10:25:21,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 10:25:21,163 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-11-10 10:25:21,163 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-10 10:25:21,163 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2018-11-10 10:25:21,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 10:25:21,164 INFO L225 Difference]: With dead ends: 25 [2018-11-10 10:25:21,164 INFO L226 Difference]: Without dead ends: 21 [2018-11-10 10:25:21,165 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-11-10 10:25:21,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-11-10 10:25:21,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-11-10 10:25:21,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-11-10 10:25:21,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-11-10 10:25:21,169 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2018-11-10 10:25:21,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 10:25:21,169 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-11-10 10:25:21,169 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-10 10:25:21,169 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-11-10 10:25:21,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-11-10 10:25:21,170 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:25:21,170 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 10:25:21,170 INFO L424 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 10:25:21,170 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:25:21,170 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2018-11-10 10:25:21,171 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 10:25:21,171 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 10:25:21,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:25:21,171 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 10:25:21,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:25:21,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:25:21,277 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-10 10:25:21,277 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 10:25:21,277 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5f656a8b-54bd-44b7-81fd-70c10473fe9a/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 [2018-11-10 10:25:21,283 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-10 10:25:21,294 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-10 10:25:21,294 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 10:25:21,296 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 10:25:21,309 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-10 10:25:21,334 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 10:25:21,334 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-11-10 10:25:21,334 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-10 10:25:21,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-10 10:25:21,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-11-10 10:25:21,335 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 9 states. [2018-11-10 10:25:21,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 10:25:21,360 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2018-11-10 10:25:21,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-10 10:25:21,360 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2018-11-10 10:25:21,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 10:25:21,361 INFO L225 Difference]: With dead ends: 28 [2018-11-10 10:25:21,361 INFO L226 Difference]: Without dead ends: 24 [2018-11-10 10:25:21,361 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-11-10 10:25:21,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-11-10 10:25:21,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-11-10 10:25:21,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-11-10 10:25:21,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2018-11-10 10:25:21,364 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2018-11-10 10:25:21,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 10:25:21,364 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2018-11-10 10:25:21,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-10 10:25:21,364 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2018-11-10 10:25:21,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-11-10 10:25:21,365 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:25:21,365 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 10:25:21,365 INFO L424 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 10:25:21,365 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:25:21,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2018-11-10 10:25:21,365 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 10:25:21,366 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 10:25:21,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:25:21,366 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 10:25:21,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:25:21,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:25:21,517 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-10 10:25:21,517 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 10:25:21,517 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5f656a8b-54bd-44b7-81fd-70c10473fe9a/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 [2018-11-10 10:25:21,535 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-10 10:25:21,551 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-11-10 10:25:21,552 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 10:25:21,553 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 10:25:21,564 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-10 10:25:21,580 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 10:25:21,580 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-11-10 10:25:21,580 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-10 10:25:21,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-10 10:25:21,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-11-10 10:25:21,581 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 11 states. [2018-11-10 10:25:21,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 10:25:21,615 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2018-11-10 10:25:21,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-10 10:25:21,615 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2018-11-10 10:25:21,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 10:25:21,616 INFO L225 Difference]: With dead ends: 31 [2018-11-10 10:25:21,616 INFO L226 Difference]: Without dead ends: 27 [2018-11-10 10:25:21,616 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-11-10 10:25:21,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-11-10 10:25:21,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-11-10 10:25:21,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-11-10 10:25:21,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-11-10 10:25:21,620 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2018-11-10 10:25:21,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 10:25:21,620 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-11-10 10:25:21,620 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-10 10:25:21,620 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-11-10 10:25:21,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-11-10 10:25:21,621 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:25:21,621 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 10:25:21,621 INFO L424 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 10:25:21,622 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:25:21,622 INFO L82 PathProgramCache]: Analyzing trace with hash 1080764669, now seen corresponding path program 4 times [2018-11-10 10:25:21,622 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 10:25:21,622 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 10:25:21,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:25:21,623 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 10:25:21,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:25:21,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:25:21,742 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-11-10 10:25:21,742 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 10:25:21,742 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5f656a8b-54bd-44b7-81fd-70c10473fe9a/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 [2018-11-10 10:25:21,748 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-10 10:25:21,766 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-10 10:25:21,766 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 10:25:21,769 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 10:25:21,786 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-11-10 10:25:21,811 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 10:25:21,811 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-11-10 10:25:21,812 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-10 10:25:21,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-10 10:25:21,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-11-10 10:25:21,812 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 13 states. [2018-11-10 10:25:21,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 10:25:21,865 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2018-11-10 10:25:21,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-10 10:25:21,865 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2018-11-10 10:25:21,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 10:25:21,866 INFO L225 Difference]: With dead ends: 34 [2018-11-10 10:25:21,866 INFO L226 Difference]: Without dead ends: 30 [2018-11-10 10:25:21,866 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-11-10 10:25:21,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-11-10 10:25:21,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-11-10 10:25:21,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-11-10 10:25:21,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2018-11-10 10:25:21,870 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2018-11-10 10:25:21,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 10:25:21,870 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2018-11-10 10:25:21,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-10 10:25:21,870 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2018-11-10 10:25:21,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-11-10 10:25:21,871 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:25:21,871 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 10:25:21,871 INFO L424 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 10:25:21,871 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:25:21,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1752970513, now seen corresponding path program 5 times [2018-11-10 10:25:21,872 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 10:25:21,872 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 10:25:21,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:25:21,872 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 10:25:21,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:25:21,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:25:22,023 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-11-10 10:25:22,024 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 10:25:22,024 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5f656a8b-54bd-44b7-81fd-70c10473fe9a/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 [2018-11-10 10:25:22,031 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-10 10:25:22,077 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-11-10 10:25:22,078 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 10:25:22,080 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 10:25:22,097 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-11-10 10:25:22,113 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 10:25:22,113 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-11-10 10:25:22,113 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-10 10:25:22,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-10 10:25:22,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-11-10 10:25:22,114 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 15 states. [2018-11-10 10:25:22,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 10:25:22,168 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2018-11-10 10:25:22,168 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-10 10:25:22,168 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 43 [2018-11-10 10:25:22,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 10:25:22,169 INFO L225 Difference]: With dead ends: 37 [2018-11-10 10:25:22,169 INFO L226 Difference]: Without dead ends: 33 [2018-11-10 10:25:22,170 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-11-10 10:25:22,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-11-10 10:25:22,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-11-10 10:25:22,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-11-10 10:25:22,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-11-10 10:25:22,173 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2018-11-10 10:25:22,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 10:25:22,174 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-11-10 10:25:22,174 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-10 10:25:22,174 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-11-10 10:25:22,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-11-10 10:25:22,174 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:25:22,174 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 10:25:22,175 INFO L424 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 10:25:22,175 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:25:22,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1590630787, now seen corresponding path program 6 times [2018-11-10 10:25:22,175 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 10:25:22,175 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 10:25:22,175 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:25:22,175 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 10:25:22,176 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:25:22,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:25:22,368 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-11-10 10:25:22,368 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 10:25:22,368 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5f656a8b-54bd-44b7-81fd-70c10473fe9a/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 [2018-11-10 10:25:22,380 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-10 10:25:22,399 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-11-10 10:25:22,399 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 10:25:22,402 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 10:25:22,412 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-11-10 10:25:22,427 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 10:25:22,428 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-11-10 10:25:22,428 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-10 10:25:22,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-10 10:25:22,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-11-10 10:25:22,428 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 17 states. [2018-11-10 10:25:22,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 10:25:22,501 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2018-11-10 10:25:22,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-10 10:25:22,501 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 49 [2018-11-10 10:25:22,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 10:25:22,502 INFO L225 Difference]: With dead ends: 40 [2018-11-10 10:25:22,502 INFO L226 Difference]: Without dead ends: 36 [2018-11-10 10:25:22,502 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-11-10 10:25:22,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-11-10 10:25:22,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-11-10 10:25:22,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-11-10 10:25:22,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2018-11-10 10:25:22,506 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2018-11-10 10:25:22,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 10:25:22,507 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2018-11-10 10:25:22,507 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-10 10:25:22,507 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2018-11-10 10:25:22,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-11-10 10:25:22,507 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:25:22,507 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 10:25:22,508 INFO L424 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 10:25:22,508 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:25:22,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1532150511, now seen corresponding path program 7 times [2018-11-10 10:25:22,508 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 10:25:22,508 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 10:25:22,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:25:22,509 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 10:25:22,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:25:22,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:25:22,693 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-11-10 10:25:22,693 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 10:25:22,693 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5f656a8b-54bd-44b7-81fd-70c10473fe9a/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 [2018-11-10 10:25:22,714 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 10:25:22,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:25:22,728 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 10:25:22,740 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-11-10 10:25:22,756 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 10:25:22,756 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-11-10 10:25:22,756 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-11-10 10:25:22,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-11-10 10:25:22,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-11-10 10:25:22,757 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 19 states. [2018-11-10 10:25:22,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 10:25:22,824 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2018-11-10 10:25:22,824 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-10 10:25:22,824 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 55 [2018-11-10 10:25:22,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 10:25:22,825 INFO L225 Difference]: With dead ends: 43 [2018-11-10 10:25:22,825 INFO L226 Difference]: Without dead ends: 39 [2018-11-10 10:25:22,825 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-11-10 10:25:22,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-11-10 10:25:22,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-11-10 10:25:22,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-11-10 10:25:22,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2018-11-10 10:25:22,828 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2018-11-10 10:25:22,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 10:25:22,828 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2018-11-10 10:25:22,828 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-11-10 10:25:22,829 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2018-11-10 10:25:22,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-11-10 10:25:22,829 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:25:22,829 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 10:25:22,829 INFO L424 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 10:25:22,829 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:25:22,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1140618237, now seen corresponding path program 8 times [2018-11-10 10:25:22,830 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 10:25:22,830 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 10:25:22,830 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:25:22,830 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 10:25:22,830 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:25:22,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:25:23,031 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-11-10 10:25:23,031 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 10:25:23,031 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5f656a8b-54bd-44b7-81fd-70c10473fe9a/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 [2018-11-10 10:25:23,038 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-10 10:25:23,051 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-10 10:25:23,051 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 10:25:23,052 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 10:25:23,080 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-11-10 10:25:23,095 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 10:25:23,096 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-11-10 10:25:23,096 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-10 10:25:23,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-10 10:25:23,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-11-10 10:25:23,097 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 21 states. [2018-11-10 10:25:23,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 10:25:23,195 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2018-11-10 10:25:23,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-11-10 10:25:23,195 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 61 [2018-11-10 10:25:23,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 10:25:23,196 INFO L225 Difference]: With dead ends: 46 [2018-11-10 10:25:23,196 INFO L226 Difference]: Without dead ends: 42 [2018-11-10 10:25:23,196 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-11-10 10:25:23,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-11-10 10:25:23,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-11-10 10:25:23,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-11-10 10:25:23,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2018-11-10 10:25:23,199 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2018-11-10 10:25:23,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 10:25:23,200 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2018-11-10 10:25:23,200 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-10 10:25:23,200 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2018-11-10 10:25:23,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-11-10 10:25:23,200 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:25:23,201 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 10:25:23,201 INFO L424 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 10:25:23,201 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:25:23,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1749177617, now seen corresponding path program 9 times [2018-11-10 10:25:23,201 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 10:25:23,201 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 10:25:23,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:25:23,202 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 10:25:23,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:25:23,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:25:23,419 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-11-10 10:25:23,419 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 10:25:23,419 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5f656a8b-54bd-44b7-81fd-70c10473fe9a/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 [2018-11-10 10:25:23,426 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-10 10:25:23,456 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-11-10 10:25:23,456 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 10:25:23,458 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 10:25:23,483 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-11-10 10:25:23,509 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 10:25:23,509 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-11-10 10:25:23,510 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-11-10 10:25:23,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-11-10 10:25:23,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-11-10 10:25:23,510 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 23 states. [2018-11-10 10:25:23,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 10:25:23,685 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2018-11-10 10:25:23,685 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-11-10 10:25:23,686 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 67 [2018-11-10 10:25:23,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 10:25:23,686 INFO L225 Difference]: With dead ends: 49 [2018-11-10 10:25:23,686 INFO L226 Difference]: Without dead ends: 45 [2018-11-10 10:25:23,687 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-11-10 10:25:23,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-11-10 10:25:23,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-11-10 10:25:23,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-11-10 10:25:23,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2018-11-10 10:25:23,691 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2018-11-10 10:25:23,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 10:25:23,691 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2018-11-10 10:25:23,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-11-10 10:25:23,691 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2018-11-10 10:25:23,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-11-10 10:25:23,692 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:25:23,692 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 10:25:23,692 INFO L424 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 10:25:23,692 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:25:23,692 INFO L82 PathProgramCache]: Analyzing trace with hash -1580609155, now seen corresponding path program 10 times [2018-11-10 10:25:23,692 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 10:25:23,693 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 10:25:23,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:25:23,693 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 10:25:23,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:25:23,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:25:23,948 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2018-11-10 10:25:23,948 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 10:25:23,948 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5f656a8b-54bd-44b7-81fd-70c10473fe9a/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 [2018-11-10 10:25:23,953 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-10 10:25:23,966 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-10 10:25:23,966 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 10:25:23,968 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 10:25:23,982 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2018-11-10 10:25:23,998 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 10:25:23,999 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-11-10 10:25:23,999 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-11-10 10:25:23,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-11-10 10:25:23,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-11-10 10:25:24,000 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 25 states. [2018-11-10 10:25:24,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 10:25:24,149 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2018-11-10 10:25:24,149 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-11-10 10:25:24,149 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 73 [2018-11-10 10:25:24,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 10:25:24,150 INFO L225 Difference]: With dead ends: 52 [2018-11-10 10:25:24,150 INFO L226 Difference]: Without dead ends: 48 [2018-11-10 10:25:24,151 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-11-10 10:25:24,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-11-10 10:25:24,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-11-10 10:25:24,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-11-10 10:25:24,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2018-11-10 10:25:24,155 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2018-11-10 10:25:24,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 10:25:24,155 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2018-11-10 10:25:24,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-11-10 10:25:24,155 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2018-11-10 10:25:24,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-11-10 10:25:24,156 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:25:24,156 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 10:25:24,156 INFO L424 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 10:25:24,156 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:25:24,156 INFO L82 PathProgramCache]: Analyzing trace with hash -223837457, now seen corresponding path program 11 times [2018-11-10 10:25:24,157 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 10:25:24,157 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 10:25:24,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:25:24,157 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 10:25:24,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:25:24,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:25:24,446 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2018-11-10 10:25:24,446 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 10:25:24,446 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5f656a8b-54bd-44b7-81fd-70c10473fe9a/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 [2018-11-10 10:25:24,454 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-10 10:25:32,255 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-11-10 10:25:32,255 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 10:25:32,260 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 10:25:32,298 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2018-11-10 10:25:32,314 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 10:25:32,315 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-11-10 10:25:32,315 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-11-10 10:25:32,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-11-10 10:25:32,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2018-11-10 10:25:32,315 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 27 states. [2018-11-10 10:25:32,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 10:25:32,469 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2018-11-10 10:25:32,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-11-10 10:25:32,469 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 79 [2018-11-10 10:25:32,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 10:25:32,470 INFO L225 Difference]: With dead ends: 55 [2018-11-10 10:25:32,470 INFO L226 Difference]: Without dead ends: 51 [2018-11-10 10:25:32,470 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2018-11-10 10:25:32,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-11-10 10:25:32,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-11-10 10:25:32,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-11-10 10:25:32,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2018-11-10 10:25:32,473 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2018-11-10 10:25:32,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 10:25:32,473 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2018-11-10 10:25:32,473 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-11-10 10:25:32,473 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2018-11-10 10:25:32,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-11-10 10:25:32,474 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:25:32,474 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 10:25:32,474 INFO L424 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 10:25:32,474 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:25:32,476 INFO L82 PathProgramCache]: Analyzing trace with hash 1653931773, now seen corresponding path program 12 times [2018-11-10 10:25:32,476 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 10:25:32,476 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 10:25:32,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:25:32,477 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 10:25:32,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:25:32,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:25:32,800 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-11-10 10:25:32,800 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 10:25:32,801 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5f656a8b-54bd-44b7-81fd-70c10473fe9a/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 [2018-11-10 10:25:32,806 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-10 10:26:27,357 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-11-10 10:26:27,357 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 10:26:27,809 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 10:26:27,823 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-11-10 10:26:27,839 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 10:26:27,839 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-11-10 10:26:27,839 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-11-10 10:26:27,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-11-10 10:26:27,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2018-11-10 10:26:27,840 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 29 states. [2018-11-10 10:26:28,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 10:26:28,000 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2018-11-10 10:26:28,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-11-10 10:26:28,001 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 85 [2018-11-10 10:26:28,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 10:26:28,002 INFO L225 Difference]: With dead ends: 58 [2018-11-10 10:26:28,002 INFO L226 Difference]: Without dead ends: 54 [2018-11-10 10:26:28,002 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2018-11-10 10:26:28,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-11-10 10:26:28,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-11-10 10:26:28,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-11-10 10:26:28,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2018-11-10 10:26:28,010 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2018-11-10 10:26:28,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 10:26:28,010 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2018-11-10 10:26:28,010 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-11-10 10:26:28,010 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2018-11-10 10:26:28,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-11-10 10:26:28,011 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:26:28,011 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 10:26:28,012 INFO L424 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 10:26:28,012 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:26:28,012 INFO L82 PathProgramCache]: Analyzing trace with hash -218674449, now seen corresponding path program 13 times [2018-11-10 10:26:28,012 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 10:26:28,012 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 10:26:28,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:26:28,013 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 10:26:28,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:26:28,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:26:28,439 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2018-11-10 10:26:28,440 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 10:26:28,440 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5f656a8b-54bd-44b7-81fd-70c10473fe9a/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 [2018-11-10 10:26:28,446 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 10:26:28,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:26:28,466 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 10:26:28,485 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2018-11-10 10:26:28,510 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 10:26:28,510 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-11-10 10:26:28,510 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-11-10 10:26:28,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-11-10 10:26:28,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2018-11-10 10:26:28,511 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 31 states. [2018-11-10 10:26:28,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 10:26:28,704 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2018-11-10 10:26:28,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-11-10 10:26:28,704 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 91 [2018-11-10 10:26:28,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 10:26:28,705 INFO L225 Difference]: With dead ends: 61 [2018-11-10 10:26:28,705 INFO L226 Difference]: Without dead ends: 57 [2018-11-10 10:26:28,706 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2018-11-10 10:26:28,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-11-10 10:26:28,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-11-10 10:26:28,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-11-10 10:26:28,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2018-11-10 10:26:28,711 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2018-11-10 10:26:28,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 10:26:28,711 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2018-11-10 10:26:28,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-11-10 10:26:28,711 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2018-11-10 10:26:28,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-11-10 10:26:28,712 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:26:28,712 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 10:26:28,712 INFO L424 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 10:26:28,712 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:26:28,712 INFO L82 PathProgramCache]: Analyzing trace with hash 492436605, now seen corresponding path program 14 times [2018-11-10 10:26:28,713 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 10:26:28,713 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 10:26:28,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:26:28,713 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 10:26:28,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:26:28,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:26:29,059 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2018-11-10 10:26:29,059 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 10:26:29,059 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5f656a8b-54bd-44b7-81fd-70c10473fe9a/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 [2018-11-10 10:26:29,064 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-10 10:26:29,080 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-10 10:26:29,080 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 10:26:29,082 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 10:26:29,109 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2018-11-10 10:26:29,124 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 10:26:29,125 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-11-10 10:26:29,125 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-11-10 10:26:29,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-11-10 10:26:29,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2018-11-10 10:26:29,126 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 33 states. [2018-11-10 10:26:29,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 10:26:29,327 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2018-11-10 10:26:29,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-11-10 10:26:29,327 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 97 [2018-11-10 10:26:29,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 10:26:29,328 INFO L225 Difference]: With dead ends: 64 [2018-11-10 10:26:29,328 INFO L226 Difference]: Without dead ends: 60 [2018-11-10 10:26:29,328 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2018-11-10 10:26:29,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-11-10 10:26:29,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-11-10 10:26:29,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-11-10 10:26:29,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2018-11-10 10:26:29,332 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2018-11-10 10:26:29,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 10:26:29,332 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2018-11-10 10:26:29,332 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-11-10 10:26:29,332 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2018-11-10 10:26:29,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-11-10 10:26:29,335 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:26:29,335 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 10:26:29,336 INFO L424 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 10:26:29,336 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:26:29,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1083048687, now seen corresponding path program 15 times [2018-11-10 10:26:29,336 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 10:26:29,336 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 10:26:29,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:26:29,337 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 10:26:29,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:26:29,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:26:29,734 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2018-11-10 10:26:29,735 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 10:26:29,735 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5f656a8b-54bd-44b7-81fd-70c10473fe9a/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 [2018-11-10 10:26:29,741 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-10 10:26:29,901 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-11-10 10:26:29,901 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 10:26:29,904 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 10:26:29,918 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2018-11-10 10:26:29,934 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 10:26:29,934 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-11-10 10:26:29,935 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-11-10 10:26:29,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-11-10 10:26:29,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2018-11-10 10:26:29,935 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 35 states. [2018-11-10 10:26:30,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 10:26:30,149 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2018-11-10 10:26:30,149 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-11-10 10:26:30,149 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 103 [2018-11-10 10:26:30,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 10:26:30,150 INFO L225 Difference]: With dead ends: 67 [2018-11-10 10:26:30,150 INFO L226 Difference]: Without dead ends: 63 [2018-11-10 10:26:30,150 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2018-11-10 10:26:30,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-11-10 10:26:30,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-11-10 10:26:30,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-11-10 10:26:30,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2018-11-10 10:26:30,154 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 103 [2018-11-10 10:26:30,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 10:26:30,154 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2018-11-10 10:26:30,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-11-10 10:26:30,155 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2018-11-10 10:26:30,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-11-10 10:26:30,155 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:26:30,155 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 10:26:30,155 INFO L424 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 10:26:30,156 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:26:30,156 INFO L82 PathProgramCache]: Analyzing trace with hash 404015613, now seen corresponding path program 16 times [2018-11-10 10:26:30,156 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 10:26:30,156 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 10:26:30,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:26:30,156 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 10:26:30,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:26:30,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:26:30,589 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2018-11-10 10:26:30,589 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 10:26:30,589 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5f656a8b-54bd-44b7-81fd-70c10473fe9a/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 [2018-11-10 10:26:30,595 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-10 10:26:30,610 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-10 10:26:30,610 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 10:26:30,612 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 10:26:30,643 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2018-11-10 10:26:30,659 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 10:26:30,660 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-11-10 10:26:30,660 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-11-10 10:26:30,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-11-10 10:26:30,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2018-11-10 10:26:30,661 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 37 states. [2018-11-10 10:26:30,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 10:26:30,905 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2018-11-10 10:26:30,905 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-11-10 10:26:30,905 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 109 [2018-11-10 10:26:30,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 10:26:30,905 INFO L225 Difference]: With dead ends: 70 [2018-11-10 10:26:30,906 INFO L226 Difference]: Without dead ends: 66 [2018-11-10 10:26:30,906 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2018-11-10 10:26:30,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-11-10 10:26:30,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-11-10 10:26:30,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-11-10 10:26:30,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2018-11-10 10:26:30,909 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 109 [2018-11-10 10:26:30,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 10:26:30,909 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2018-11-10 10:26:30,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-11-10 10:26:30,909 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2018-11-10 10:26:30,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-11-10 10:26:30,910 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:26:30,910 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 10:26:30,910 INFO L424 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 10:26:30,910 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:26:30,910 INFO L82 PathProgramCache]: Analyzing trace with hash -464475409, now seen corresponding path program 17 times [2018-11-10 10:26:30,910 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 10:26:30,910 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 10:26:30,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:26:30,911 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 10:26:30,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:26:30,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:26:31,483 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2018-11-10 10:26:31,483 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 10:26:31,483 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5f656a8b-54bd-44b7-81fd-70c10473fe9a/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 [2018-11-10 10:26:31,488 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-10 10:28:43,533 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-11-10 10:28:43,533 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 10:28:43,676 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 10:28:43,697 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2018-11-10 10:28:43,715 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 10:28:43,716 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-11-10 10:28:43,716 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-11-10 10:28:43,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-11-10 10:28:43,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2018-11-10 10:28:43,716 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 39 states. [2018-11-10 10:28:44,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 10:28:44,022 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2018-11-10 10:28:44,026 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-11-10 10:28:44,026 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 115 [2018-11-10 10:28:44,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 10:28:44,027 INFO L225 Difference]: With dead ends: 73 [2018-11-10 10:28:44,027 INFO L226 Difference]: Without dead ends: 69 [2018-11-10 10:28:44,028 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2018-11-10 10:28:44,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-11-10 10:28:44,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-11-10 10:28:44,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-11-10 10:28:44,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2018-11-10 10:28:44,031 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 115 [2018-11-10 10:28:44,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 10:28:44,032 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2018-11-10 10:28:44,032 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-11-10 10:28:44,032 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2018-11-10 10:28:44,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-11-10 10:28:44,032 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:28:44,032 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 10:28:44,033 INFO L424 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 10:28:44,033 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:28:44,033 INFO L82 PathProgramCache]: Analyzing trace with hash 130115453, now seen corresponding path program 18 times [2018-11-10 10:28:44,033 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 10:28:44,033 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 10:28:44,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:28:44,034 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 10:28:44,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:28:44,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:28:44,613 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2018-11-10 10:28:44,613 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 10:28:44,613 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5f656a8b-54bd-44b7-81fd-70c10473fe9a/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 [2018-11-10 10:28:44,619 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-10 10:29:16,297 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-11-10 10:29:16,297 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 10:29:16,320 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 10:29:16,338 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2018-11-10 10:29:16,355 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 10:29:16,355 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-11-10 10:29:16,355 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-11-10 10:29:16,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-11-10 10:29:16,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2018-11-10 10:29:16,356 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 41 states. [2018-11-10 10:29:16,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 10:29:16,672 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2018-11-10 10:29:16,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-11-10 10:29:16,672 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 121 [2018-11-10 10:29:16,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 10:29:16,673 INFO L225 Difference]: With dead ends: 76 [2018-11-10 10:29:16,673 INFO L226 Difference]: Without dead ends: 72 [2018-11-10 10:29:16,673 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2018-11-10 10:29:16,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-11-10 10:29:16,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-11-10 10:29:16,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-11-10 10:29:16,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2018-11-10 10:29:16,677 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 121 [2018-11-10 10:29:16,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 10:29:16,677 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2018-11-10 10:29:16,677 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-11-10 10:29:16,677 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2018-11-10 10:29:16,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-11-10 10:29:16,678 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:29:16,678 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 10:29:16,678 INFO L424 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 10:29:16,678 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:29:16,678 INFO L82 PathProgramCache]: Analyzing trace with hash -2010955025, now seen corresponding path program 19 times [2018-11-10 10:29:16,678 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 10:29:16,678 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 10:29:16,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:29:16,679 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 10:29:16,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:29:16,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:29:17,308 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2018-11-10 10:29:17,308 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 10:29:17,308 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5f656a8b-54bd-44b7-81fd-70c10473fe9a/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 [2018-11-10 10:29:17,314 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 10:29:17,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 10:29:17,338 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 10:29:17,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2018-11-10 10:29:17,388 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 10:29:17,388 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-11-10 10:29:17,388 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-11-10 10:29:17,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-11-10 10:29:17,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2018-11-10 10:29:17,389 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 43 states. [2018-11-10 10:29:17,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 10:29:17,720 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2018-11-10 10:29:17,720 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-11-10 10:29:17,720 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 127 [2018-11-10 10:29:17,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 10:29:17,721 INFO L225 Difference]: With dead ends: 79 [2018-11-10 10:29:17,721 INFO L226 Difference]: Without dead ends: 75 [2018-11-10 10:29:17,722 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 127 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2018-11-10 10:29:17,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-11-10 10:29:17,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-11-10 10:29:17,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-11-10 10:29:17,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2018-11-10 10:29:17,724 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 127 [2018-11-10 10:29:17,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 10:29:17,724 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2018-11-10 10:29:17,724 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-11-10 10:29:17,725 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2018-11-10 10:29:17,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-11-10 10:29:17,725 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 10:29:17,725 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 10:29:17,725 INFO L424 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 10:29:17,726 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 10:29:17,726 INFO L82 PathProgramCache]: Analyzing trace with hash -799288067, now seen corresponding path program 20 times [2018-11-10 10:29:17,726 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 10:29:17,726 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 10:29:17,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:29:17,726 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 10:29:17,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 10:29:17,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 10:29:17,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 10:29:17,876 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-11-10 10:29:17,904 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.11 10:29:17 BoogieIcfgContainer [2018-11-10 10:29:17,904 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-10 10:29:17,905 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-10 10:29:17,905 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-10 10:29:17,905 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-10 10:29:17,905 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 10:25:20" (3/4) ... [2018-11-10 10:29:17,909 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-11-10 10:29:17,954 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_5f656a8b-54bd-44b7-81fd-70c10473fe9a/bin-2019/uautomizer/witness.graphml [2018-11-10 10:29:17,954 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-10 10:29:17,955 INFO L168 Benchmark]: Toolchain (without parser) took 237593.25 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 184.0 MB). Free memory was 954.8 MB in the beginning and 1.1 GB in the end (delta: -181.7 MB). Peak memory consumption was 2.3 MB. Max. memory is 11.5 GB. [2018-11-10 10:29:17,956 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 1.0 GB. Free memory is still 980.1 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 10:29:17,956 INFO L168 Benchmark]: CACSL2BoogieTranslator took 132.11 ms. Allocated memory is still 1.0 GB. Free memory was 954.8 MB in the beginning and 943.0 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 11.5 GB. [2018-11-10 10:29:17,956 INFO L168 Benchmark]: Boogie Preprocessor took 15.62 ms. Allocated memory is still 1.0 GB. Free memory is still 943.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 10:29:17,956 INFO L168 Benchmark]: RCFGBuilder took 170.54 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 156.8 MB). Free memory was 943.0 MB in the beginning and 1.1 GB in the end (delta: -204.3 MB). Peak memory consumption was 22.4 MB. Max. memory is 11.5 GB. [2018-11-10 10:29:17,957 INFO L168 Benchmark]: TraceAbstraction took 237222.11 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 27.3 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 4.4 MB). Peak memory consumption was 31.7 MB. Max. memory is 11.5 GB. [2018-11-10 10:29:17,957 INFO L168 Benchmark]: Witness Printer took 49.69 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 11.5 GB. [2018-11-10 10:29:17,958 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 980.1 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 132.11 ms. Allocated memory is still 1.0 GB. Free memory was 954.8 MB in the beginning and 943.0 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 15.62 ms. Allocated memory is still 1.0 GB. Free memory is still 943.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 170.54 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 156.8 MB). Free memory was 943.0 MB in the beginning and 1.1 GB in the end (delta: -204.3 MB). Peak memory consumption was 22.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 237222.11 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 27.3 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 4.4 MB). Peak memory consumption was 31.7 MB. Max. memory is 11.5 GB. * Witness Printer took 49.69 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L10] unsigned int input = __VERIFIER_nondet_uint(); [L11] CALL, EXPR id(input) VAL [\old(x)=20] [L5] COND FALSE !(x==0) VAL [\old(x)=20, x=20] [L6] CALL, EXPR id(x-1) VAL [\old(x)=19] [L5] COND FALSE !(x==0) VAL [\old(x)=19, x=19] [L6] CALL, EXPR id(x-1) VAL [\old(x)=18] [L5] COND FALSE !(x==0) VAL [\old(x)=18, x=18] [L6] CALL, EXPR id(x-1) VAL [\old(x)=17] [L5] COND FALSE !(x==0) VAL [\old(x)=17, x=17] [L6] CALL, EXPR id(x-1) VAL [\old(x)=16] [L5] COND FALSE !(x==0) VAL [\old(x)=16, x=16] [L6] CALL, EXPR id(x-1) VAL [\old(x)=15] [L5] COND FALSE !(x==0) VAL [\old(x)=15, x=15] [L6] CALL, EXPR id(x-1) VAL [\old(x)=14] [L5] COND FALSE !(x==0) VAL [\old(x)=14, x=14] [L6] CALL, EXPR id(x-1) VAL [\old(x)=13] [L5] COND FALSE !(x==0) VAL [\old(x)=13, x=13] [L6] CALL, EXPR id(x-1) VAL [\old(x)=12] [L5] COND FALSE !(x==0) VAL [\old(x)=12, x=12] [L6] CALL, EXPR id(x-1) VAL [\old(x)=11] [L5] COND FALSE !(x==0) VAL [\old(x)=11, x=11] [L6] CALL, EXPR id(x-1) VAL [\old(x)=10] [L5] COND FALSE !(x==0) VAL [\old(x)=10, x=10] [L6] CALL, EXPR id(x-1) VAL [\old(x)=9] [L5] COND FALSE !(x==0) VAL [\old(x)=9, x=9] [L6] CALL, EXPR id(x-1) VAL [\old(x)=8] [L5] COND FALSE !(x==0) VAL [\old(x)=8, x=8] [L6] CALL, EXPR id(x-1) VAL [\old(x)=7] [L5] COND FALSE !(x==0) VAL [\old(x)=7, x=7] [L6] CALL, EXPR id(x-1) VAL [\old(x)=6] [L5] COND FALSE !(x==0) VAL [\old(x)=6, x=6] [L6] CALL, EXPR id(x-1) VAL [\old(x)=5] [L5] COND FALSE !(x==0) VAL [\old(x)=5, x=5] [L6] CALL, EXPR id(x-1) VAL [\old(x)=4] [L5] COND FALSE !(x==0) VAL [\old(x)=4, x=4] [L6] CALL, EXPR id(x-1) VAL [\old(x)=3] [L5] COND FALSE !(x==0) VAL [\old(x)=3, x=3] [L6] CALL, EXPR id(x-1) VAL [\old(x)=2] [L5] COND FALSE !(x==0) VAL [\old(x)=2, x=2] [L6] CALL, EXPR id(x-1) VAL [\old(x)=1] [L5] COND FALSE !(x==0) VAL [\old(x)=1, x=1] [L6] CALL, EXPR id(x-1) VAL [\old(x)=0] [L5] COND TRUE x==0 [L5] RET return 0; VAL [\old(x)=0, \result=0, x=0] [L6] EXPR id(x-1) VAL [\old(x)=1, id(x-1)=0, x=1] [L6] RET return id(x-1) + 1; [L6] EXPR id(x-1) VAL [\old(x)=2, id(x-1)=1, x=2] [L6] RET return id(x-1) + 1; [L6] EXPR id(x-1) VAL [\old(x)=3, id(x-1)=2, x=3] [L6] RET return id(x-1) + 1; [L6] EXPR id(x-1) VAL [\old(x)=4, id(x-1)=3, x=4] [L6] RET return id(x-1) + 1; [L6] EXPR id(x-1) VAL [\old(x)=5, id(x-1)=4, x=5] [L6] RET return id(x-1) + 1; [L6] EXPR id(x-1) VAL [\old(x)=6, id(x-1)=5, x=6] [L6] RET return id(x-1) + 1; [L6] EXPR id(x-1) VAL [\old(x)=7, id(x-1)=6, x=7] [L6] RET return id(x-1) + 1; [L6] EXPR id(x-1) VAL [\old(x)=8, id(x-1)=7, x=8] [L6] RET return id(x-1) + 1; [L6] EXPR id(x-1) VAL [\old(x)=9, id(x-1)=8, x=9] [L6] RET return id(x-1) + 1; [L6] EXPR id(x-1) VAL [\old(x)=10, id(x-1)=9, x=10] [L6] RET return id(x-1) + 1; [L6] EXPR id(x-1) VAL [\old(x)=11, id(x-1)=10, x=11] [L6] RET return id(x-1) + 1; [L6] EXPR id(x-1) VAL [\old(x)=12, id(x-1)=11, x=12] [L6] RET return id(x-1) + 1; [L6] EXPR id(x-1) VAL [\old(x)=13, id(x-1)=12, x=13] [L6] RET return id(x-1) + 1; [L6] EXPR id(x-1) VAL [\old(x)=14, id(x-1)=13, x=14] [L6] RET return id(x-1) + 1; [L6] EXPR id(x-1) VAL [\old(x)=15, id(x-1)=14, x=15] [L6] RET return id(x-1) + 1; [L6] EXPR id(x-1) VAL [\old(x)=16, id(x-1)=15, x=16] [L6] RET return id(x-1) + 1; [L6] EXPR id(x-1) VAL [\old(x)=17, id(x-1)=16, x=17] [L6] RET return id(x-1) + 1; [L6] EXPR id(x-1) VAL [\old(x)=18, id(x-1)=17, x=18] [L6] RET return id(x-1) + 1; [L6] EXPR id(x-1) VAL [\old(x)=19, id(x-1)=18, x=19] [L6] RET return id(x-1) + 1; [L6] EXPR id(x-1) VAL [\old(x)=20, id(x-1)=19, x=20] [L6] RET return id(x-1) + 1; [L11] EXPR id(input) VAL [id(input)=20, input=20] [L11] unsigned int result = id(input); [L12] COND TRUE result == 20 VAL [input=20, result=20] [L13] __VERIFIER_error() VAL [input=20, result=20] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. UNSAFE Result, 237.1s OverallTime, 21 OverallIterations, 21 TraceHistogramMax, 2.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 684 SDtfs, 2 SDslu, 14532 SDs, 0 SdLazy, 8656 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1848 GetRequests, 1389 SyntacticMatches, 19 SemanticMatches, 440 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=75occurred in iteration=20, 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: 0.0s AutomataMinimizationTime, 20 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 226.6s SatisfiabilityAnalysisTime, 6.5s InterpolantComputationTime, 2920 NumberOfCodeBlocks, 2920 NumberOfCodeBlocksAsserted, 142 NumberOfCheckSat, 2748 ConstructedInterpolants, 0 QuantifiedInterpolants, 919728 SizeOfPredicates, 19 NumberOfNonLiveVariables, 2850 ConjunctsInSsa, 912 ConjunctsInUnsatCore, 39 InterpolantComputations, 1 PerfectInterpolantSequences, 7600/15200 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...