./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/recursive-simple/id_i25_o25_false-unreach-call_true-termination.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_3449c345-ecc7-4290-b295-8b63994d4523/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_3449c345-ecc7-4290-b295-8b63994d4523/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_3449c345-ecc7-4290-b295-8b63994d4523/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_3449c345-ecc7-4290-b295-8b63994d4523/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/id_i25_o25_false-unreach-call_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_3449c345-ecc7-4290-b295-8b63994d4523/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_3449c345-ecc7-4290-b295-8b63994d4523/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 a544811fe2a74801350302afc46fb67e1c6f238a ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 [2018-10-27 00:51:01,879 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-27 00:51:01,881 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-27 00:51:01,892 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-27 00:51:01,894 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-27 00:51:01,896 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-27 00:51:01,899 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-27 00:51:01,901 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-27 00:51:01,903 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-27 00:51:01,905 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-27 00:51:01,908 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-27 00:51:01,908 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-27 00:51:01,909 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-27 00:51:01,910 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-27 00:51:01,911 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-27 00:51:01,912 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-27 00:51:01,912 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-27 00:51:01,914 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-27 00:51:01,916 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-27 00:51:01,918 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-27 00:51:01,919 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-27 00:51:01,920 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-27 00:51:01,926 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-27 00:51:01,927 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-27 00:51:01,927 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-27 00:51:01,928 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-27 00:51:01,928 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-27 00:51:01,929 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-27 00:51:01,932 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-27 00:51:01,933 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-27 00:51:01,933 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-27 00:51:01,934 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-27 00:51:01,934 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-27 00:51:01,934 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-27 00:51:01,935 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-27 00:51:01,936 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-27 00:51:01,936 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_3449c345-ecc7-4290-b295-8b63994d4523/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-10-27 00:51:01,952 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-27 00:51:01,957 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-27 00:51:01,960 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-27 00:51:01,960 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-27 00:51:01,961 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-27 00:51:01,961 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-27 00:51:01,961 INFO L133 SettingsManager]: * Use SBE=true [2018-10-27 00:51:01,961 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-27 00:51:01,961 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-27 00:51:01,961 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-27 00:51:01,962 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-27 00:51:01,962 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-27 00:51:01,962 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-27 00:51:01,962 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-27 00:51:01,962 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-27 00:51:01,962 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-27 00:51:01,963 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-27 00:51:01,963 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-27 00:51:01,963 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-27 00:51:01,963 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-27 00:51:01,963 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-27 00:51:01,963 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-27 00:51:01,964 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-27 00:51:01,964 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-27 00:51:01,964 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-27 00:51:01,964 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-27 00:51:01,964 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-27 00:51:01,965 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-27 00:51:01,965 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-27 00:51:01,965 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_3449c345-ecc7-4290-b295-8b63994d4523/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 -> a544811fe2a74801350302afc46fb67e1c6f238a [2018-10-27 00:51:02,014 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-27 00:51:02,032 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-27 00:51:02,035 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-27 00:51:02,036 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-27 00:51:02,036 INFO L276 PluginConnector]: CDTParser initialized [2018-10-27 00:51:02,037 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_3449c345-ecc7-4290-b295-8b63994d4523/bin-2019/uautomizer/../../sv-benchmarks/c/recursive-simple/id_i25_o25_false-unreach-call_true-termination.c [2018-10-27 00:51:02,096 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_3449c345-ecc7-4290-b295-8b63994d4523/bin-2019/uautomizer/data/e3d35dace/d76551b9bde5434e8080a55e20ef4e1c/FLAG4e493e845 [2018-10-27 00:51:02,478 INFO L298 CDTParser]: Found 1 translation units. [2018-10-27 00:51:02,479 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_3449c345-ecc7-4290-b295-8b63994d4523/sv-benchmarks/c/recursive-simple/id_i25_o25_false-unreach-call_true-termination.c [2018-10-27 00:51:02,485 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_3449c345-ecc7-4290-b295-8b63994d4523/bin-2019/uautomizer/data/e3d35dace/d76551b9bde5434e8080a55e20ef4e1c/FLAG4e493e845 [2018-10-27 00:51:02,497 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_3449c345-ecc7-4290-b295-8b63994d4523/bin-2019/uautomizer/data/e3d35dace/d76551b9bde5434e8080a55e20ef4e1c [2018-10-27 00:51:02,500 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-27 00:51:02,501 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-27 00:51:02,502 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-27 00:51:02,502 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-27 00:51:02,506 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-27 00:51:02,507 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:51:02" (1/1) ... [2018-10-27 00:51:02,509 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8d01454 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:51:02, skipping insertion in model container [2018-10-27 00:51:02,509 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:51:02" (1/1) ... [2018-10-27 00:51:02,522 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-27 00:51:02,535 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-27 00:51:02,666 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 00:51:02,669 INFO L189 MainTranslator]: Completed pre-run [2018-10-27 00:51:02,680 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 00:51:02,690 INFO L193 MainTranslator]: Completed translation [2018-10-27 00:51:02,691 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:51:02 WrapperNode [2018-10-27 00:51:02,691 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-27 00:51:02,691 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-27 00:51:02,692 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-27 00:51:02,692 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-27 00:51:02,705 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:51:02" (1/1) ... [2018-10-27 00:51:02,705 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:51:02" (1/1) ... [2018-10-27 00:51:02,710 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:51:02" (1/1) ... [2018-10-27 00:51:02,710 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:51:02" (1/1) ... [2018-10-27 00:51:02,713 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:51:02" (1/1) ... [2018-10-27 00:51:02,715 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:51:02" (1/1) ... [2018-10-27 00:51:02,715 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:51:02" (1/1) ... [2018-10-27 00:51:02,717 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-27 00:51:02,717 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-27 00:51:02,717 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-27 00:51:02,717 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-27 00:51:02,718 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:51:02" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3449c345-ecc7-4290-b295-8b63994d4523/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 [2018-10-27 00:51:02,786 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-27 00:51:02,786 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-27 00:51:02,787 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2018-10-27 00:51:02,787 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-27 00:51:02,787 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-10-27 00:51:02,787 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-10-27 00:51:02,787 INFO L130 BoogieDeclarations]: Found specification of procedure id [2018-10-27 00:51:02,788 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-27 00:51:02,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-27 00:51:02,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-27 00:51:03,157 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-27 00:51:03,157 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:51:03 BoogieIcfgContainer [2018-10-27 00:51:03,157 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-27 00:51:03,158 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-27 00:51:03,158 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-27 00:51:03,163 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-27 00:51:03,163 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 12:51:02" (1/3) ... [2018-10-27 00:51:03,164 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63b87b96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:51:03, skipping insertion in model container [2018-10-27 00:51:03,164 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:51:02" (2/3) ... [2018-10-27 00:51:03,164 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63b87b96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:51:03, skipping insertion in model container [2018-10-27 00:51:03,164 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:51:03" (3/3) ... [2018-10-27 00:51:03,168 INFO L112 eAbstractionObserver]: Analyzing ICFG id_i25_o25_false-unreach-call_true-termination.c [2018-10-27 00:51:03,178 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-27 00:51:03,186 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-27 00:51:03,203 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-27 00:51:03,235 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-27 00:51:03,236 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-27 00:51:03,236 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-27 00:51:03,236 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-27 00:51:03,236 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-27 00:51:03,236 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-27 00:51:03,236 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-27 00:51:03,236 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-27 00:51:03,237 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-27 00:51:03,256 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2018-10-27 00:51:03,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-27 00:51:03,263 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 00:51:03,264 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 00:51:03,266 INFO L424 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 00:51:03,272 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 00:51:03,273 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2018-10-27 00:51:03,274 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 00:51:03,275 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 00:51:03,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:51:03,328 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 00:51:03,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:51:03,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:51:03,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 00:51:03,652 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 00:51:03,652 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-27 00:51:03,657 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-27 00:51:03,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-27 00:51:03,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-27 00:51:03,674 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2018-10-27 00:51:03,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 00:51:03,805 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2018-10-27 00:51:03,806 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-27 00:51:03,807 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-10-27 00:51:03,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 00:51:03,817 INFO L225 Difference]: With dead ends: 30 [2018-10-27 00:51:03,817 INFO L226 Difference]: Without dead ends: 18 [2018-10-27 00:51:03,820 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-10-27 00:51:03,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-27 00:51:03,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-10-27 00:51:03,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-27 00:51:03,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2018-10-27 00:51:03,859 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2018-10-27 00:51:03,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 00:51:03,859 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2018-10-27 00:51:03,859 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-27 00:51:03,859 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2018-10-27 00:51:03,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-27 00:51:03,861 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 00:51:03,861 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 00:51:03,862 INFO L424 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 00:51:03,862 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 00:51:03,862 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2018-10-27 00:51:03,862 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 00:51:03,862 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 00:51:03,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:51:03,863 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 00:51:03,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:51:03,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:51:03,956 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-27 00:51:03,956 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 00:51:03,957 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3449c345-ecc7-4290-b295-8b63994d4523/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 [2018-10-27 00:51:03,973 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 00:51:04,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:51:04,009 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 00:51:04,049 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-27 00:51:04,080 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-27 00:51:04,080 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-27 00:51:04,081 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 00:51:04,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 00:51:04,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-10-27 00:51:04,082 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2018-10-27 00:51:04,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 00:51:04,215 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-10-27 00:51:04,216 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-27 00:51:04,216 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2018-10-27 00:51:04,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 00:51:04,217 INFO L225 Difference]: With dead ends: 25 [2018-10-27 00:51:04,217 INFO L226 Difference]: Without dead ends: 21 [2018-10-27 00:51:04,218 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-10-27 00:51:04,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-27 00:51:04,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-27 00:51:04,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-27 00:51:04,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-10-27 00:51:04,223 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2018-10-27 00:51:04,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 00:51:04,224 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-10-27 00:51:04,224 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 00:51:04,224 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-10-27 00:51:04,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-10-27 00:51:04,225 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 00:51:04,225 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 00:51:04,225 INFO L424 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 00:51:04,226 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 00:51:04,226 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2018-10-27 00:51:04,226 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 00:51:04,226 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 00:51:04,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:51:04,227 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 00:51:04,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:51:04,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:51:04,547 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-10-27 00:51:04,548 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 00:51:04,548 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3449c345-ecc7-4290-b295-8b63994d4523/bin-2019/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-10-27 00:51:04,566 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 00:51:04,605 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-27 00:51:04,606 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-27 00:51:04,611 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 00:51:04,632 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-10-27 00:51:04,656 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-27 00:51:04,656 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-27 00:51:04,656 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-27 00:51:04,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-27 00:51:04,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-10-27 00:51:04,658 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 7 states. [2018-10-27 00:51:04,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 00:51:04,855 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2018-10-27 00:51:04,856 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-27 00:51:04,856 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2018-10-27 00:51:04,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 00:51:04,857 INFO L225 Difference]: With dead ends: 28 [2018-10-27 00:51:04,857 INFO L226 Difference]: Without dead ends: 24 [2018-10-27 00:51:04,858 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-10-27 00:51:04,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-27 00:51:04,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-10-27 00:51:04,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-27 00:51:04,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2018-10-27 00:51:04,865 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2018-10-27 00:51:04,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 00:51:04,865 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2018-10-27 00:51:04,865 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-27 00:51:04,865 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2018-10-27 00:51:04,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-10-27 00:51:04,866 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 00:51:04,866 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 00:51:04,866 INFO L424 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 00:51:04,867 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 00:51:04,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2018-10-27 00:51:04,867 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 00:51:04,867 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 00:51:04,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:51:04,868 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-27 00:51:04,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:51:04,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:51:05,010 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-10-27 00:51:05,010 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 00:51:05,010 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3449c345-ecc7-4290-b295-8b63994d4523/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 [2018-10-27 00:51:05,024 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-27 00:51:05,038 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-27 00:51:05,039 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-27 00:51:05,040 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 00:51:05,050 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-10-27 00:51:05,086 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-27 00:51:05,086 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-27 00:51:05,086 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-27 00:51:05,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-27 00:51:05,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2018-10-27 00:51:05,087 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 11 states. [2018-10-27 00:51:05,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 00:51:05,133 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2018-10-27 00:51:05,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-27 00:51:05,134 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2018-10-27 00:51:05,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 00:51:05,134 INFO L225 Difference]: With dead ends: 31 [2018-10-27 00:51:05,135 INFO L226 Difference]: Without dead ends: 27 [2018-10-27 00:51:05,135 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2018-10-27 00:51:05,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-27 00:51:05,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-10-27 00:51:05,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-27 00:51:05,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-10-27 00:51:05,141 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2018-10-27 00:51:05,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 00:51:05,142 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-10-27 00:51:05,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-27 00:51:05,142 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-10-27 00:51:05,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-27 00:51:05,143 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 00:51:05,143 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 00:51:05,143 INFO L424 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 00:51:05,143 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 00:51:05,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1080764669, now seen corresponding path program 4 times [2018-10-27 00:51:05,144 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 00:51:05,144 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 00:51:05,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:51:05,145 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-27 00:51:05,145 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:51:05,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:51:05,584 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-10-27 00:51:05,584 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 00:51:05,584 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3449c345-ecc7-4290-b295-8b63994d4523/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 [2018-10-27 00:51:05,594 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-27 00:51:05,617 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-27 00:51:05,617 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-27 00:51:05,620 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 00:51:05,647 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-10-27 00:51:05,679 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-27 00:51:05,679 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-27 00:51:05,679 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-27 00:51:05,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-27 00:51:05,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-10-27 00:51:05,680 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 9 states. [2018-10-27 00:51:05,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 00:51:05,779 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2018-10-27 00:51:05,781 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-27 00:51:05,781 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2018-10-27 00:51:05,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 00:51:05,782 INFO L225 Difference]: With dead ends: 34 [2018-10-27 00:51:05,782 INFO L226 Difference]: Without dead ends: 30 [2018-10-27 00:51:05,782 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2018-10-27 00:51:05,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-27 00:51:05,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-10-27 00:51:05,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-27 00:51:05,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2018-10-27 00:51:05,786 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2018-10-27 00:51:05,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 00:51:05,786 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2018-10-27 00:51:05,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-27 00:51:05,786 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2018-10-27 00:51:05,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-10-27 00:51:05,787 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 00:51:05,787 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 00:51:05,787 INFO L424 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 00:51:05,787 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 00:51:05,787 INFO L82 PathProgramCache]: Analyzing trace with hash -1752970513, now seen corresponding path program 5 times [2018-10-27 00:51:05,788 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 00:51:05,788 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 00:51:05,788 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:51:05,788 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-27 00:51:05,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:51:05,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:51:05,950 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-10-27 00:51:05,950 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 00:51:05,951 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3449c345-ecc7-4290-b295-8b63994d4523/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 [2018-10-27 00:51:05,958 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-27 00:51:05,993 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-27 00:51:05,994 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-27 00:51:05,997 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 00:51:06,011 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-10-27 00:51:06,037 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-27 00:51:06,037 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-27 00:51:06,038 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-27 00:51:06,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-27 00:51:06,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2018-10-27 00:51:06,038 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 15 states. [2018-10-27 00:51:06,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 00:51:06,092 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2018-10-27 00:51:06,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-27 00:51:06,093 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 43 [2018-10-27 00:51:06,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 00:51:06,094 INFO L225 Difference]: With dead ends: 37 [2018-10-27 00:51:06,094 INFO L226 Difference]: Without dead ends: 33 [2018-10-27 00:51:06,094 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2018-10-27 00:51:06,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-27 00:51:06,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-10-27 00:51:06,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-27 00:51:06,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-10-27 00:51:06,107 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2018-10-27 00:51:06,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 00:51:06,108 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-10-27 00:51:06,108 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-27 00:51:06,108 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-10-27 00:51:06,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-10-27 00:51:06,109 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 00:51:06,109 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 00:51:06,109 INFO L424 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 00:51:06,109 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 00:51:06,110 INFO L82 PathProgramCache]: Analyzing trace with hash -1590630787, now seen corresponding path program 6 times [2018-10-27 00:51:06,110 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 00:51:06,110 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 00:51:06,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:51:06,111 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-27 00:51:06,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:51:06,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:51:06,336 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-10-27 00:51:06,337 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 00:51:06,337 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3449c345-ecc7-4290-b295-8b63994d4523/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 [2018-10-27 00:51:06,346 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-27 00:51:06,372 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-27 00:51:06,372 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-27 00:51:06,375 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 00:51:06,691 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-10-27 00:51:06,711 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-27 00:51:06,711 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11] total 26 [2018-10-27 00:51:06,711 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-27 00:51:06,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-27 00:51:06,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2018-10-27 00:51:06,712 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 26 states. [2018-10-27 00:51:07,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 00:51:07,214 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2018-10-27 00:51:07,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-27 00:51:07,215 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 49 [2018-10-27 00:51:07,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 00:51:07,216 INFO L225 Difference]: With dead ends: 40 [2018-10-27 00:51:07,216 INFO L226 Difference]: Without dead ends: 36 [2018-10-27 00:51:07,217 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=279, Invalid=1203, Unknown=0, NotChecked=0, Total=1482 [2018-10-27 00:51:07,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-10-27 00:51:07,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-10-27 00:51:07,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-27 00:51:07,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2018-10-27 00:51:07,221 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2018-10-27 00:51:07,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 00:51:07,221 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2018-10-27 00:51:07,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-27 00:51:07,221 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2018-10-27 00:51:07,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-10-27 00:51:07,222 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 00:51:07,223 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 00:51:07,223 INFO L424 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 00:51:07,223 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 00:51:07,223 INFO L82 PathProgramCache]: Analyzing trace with hash 1532150511, now seen corresponding path program 7 times [2018-10-27 00:51:07,223 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 00:51:07,224 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 00:51:07,224 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:51:07,224 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-27 00:51:07,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:51:07,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:51:07,422 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-10-27 00:51:07,423 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 00:51:07,423 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3449c345-ecc7-4290-b295-8b63994d4523/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 [2018-10-27 00:51:07,430 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 00:51:07,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:51:07,450 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 00:51:07,625 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-10-27 00:51:07,645 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-27 00:51:07,645 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 12] total 29 [2018-10-27 00:51:07,645 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-27 00:51:07,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-27 00:51:07,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2018-10-27 00:51:07,646 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 29 states. [2018-10-27 00:51:08,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 00:51:08,213 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2018-10-27 00:51:08,214 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-27 00:51:08,214 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 55 [2018-10-27 00:51:08,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 00:51:08,215 INFO L225 Difference]: With dead ends: 43 [2018-10-27 00:51:08,215 INFO L226 Difference]: Without dead ends: 39 [2018-10-27 00:51:08,216 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=354, Invalid=1538, Unknown=0, NotChecked=0, Total=1892 [2018-10-27 00:51:08,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-27 00:51:08,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-10-27 00:51:08,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-27 00:51:08,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2018-10-27 00:51:08,221 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2018-10-27 00:51:08,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 00:51:08,221 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2018-10-27 00:51:08,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-27 00:51:08,221 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2018-10-27 00:51:08,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-10-27 00:51:08,222 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 00:51:08,223 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 00:51:08,223 INFO L424 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 00:51:08,223 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 00:51:08,223 INFO L82 PathProgramCache]: Analyzing trace with hash 1140618237, now seen corresponding path program 8 times [2018-10-27 00:51:08,223 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 00:51:08,223 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 00:51:08,224 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:51:08,224 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 00:51:08,224 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:51:08,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:51:08,335 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-10-27 00:51:08,336 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 00:51:08,336 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3449c345-ecc7-4290-b295-8b63994d4523/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 [2018-10-27 00:51:08,342 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-27 00:51:08,358 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-27 00:51:08,358 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-27 00:51:08,361 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 00:51:08,383 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-10-27 00:51:08,401 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-27 00:51:08,401 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-27 00:51:08,402 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-27 00:51:08,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-27 00:51:08,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2018-10-27 00:51:08,402 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 13 states. [2018-10-27 00:51:08,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 00:51:08,518 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2018-10-27 00:51:08,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-27 00:51:08,518 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2018-10-27 00:51:08,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 00:51:08,521 INFO L225 Difference]: With dead ends: 46 [2018-10-27 00:51:08,521 INFO L226 Difference]: Without dead ends: 42 [2018-10-27 00:51:08,522 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2018-10-27 00:51:08,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-10-27 00:51:08,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-10-27 00:51:08,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-10-27 00:51:08,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2018-10-27 00:51:08,529 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2018-10-27 00:51:08,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 00:51:08,529 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2018-10-27 00:51:08,531 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-27 00:51:08,531 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2018-10-27 00:51:08,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-10-27 00:51:08,532 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 00:51:08,532 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 00:51:08,532 INFO L424 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 00:51:08,532 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 00:51:08,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1749177617, now seen corresponding path program 9 times [2018-10-27 00:51:08,533 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 00:51:08,533 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 00:51:08,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:51:08,536 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-27 00:51:08,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:51:08,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:51:08,706 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-10-27 00:51:08,706 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 00:51:08,706 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3449c345-ecc7-4290-b295-8b63994d4523/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 [2018-10-27 00:51:08,720 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-27 00:51:08,871 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-27 00:51:08,871 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-27 00:51:08,874 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 00:51:09,168 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-10-27 00:51:09,188 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-27 00:51:09,188 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 23] total 35 [2018-10-27 00:51:09,189 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-27 00:51:09,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-27 00:51:09,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=997, Unknown=0, NotChecked=0, Total=1190 [2018-10-27 00:51:09,190 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 35 states. [2018-10-27 00:51:09,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 00:51:09,611 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2018-10-27 00:51:09,612 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-27 00:51:09,612 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 67 [2018-10-27 00:51:09,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 00:51:09,613 INFO L225 Difference]: With dead ends: 49 [2018-10-27 00:51:09,613 INFO L226 Difference]: Without dead ends: 45 [2018-10-27 00:51:09,614 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=531, Invalid=2331, Unknown=0, NotChecked=0, Total=2862 [2018-10-27 00:51:09,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-27 00:51:09,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-10-27 00:51:09,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-10-27 00:51:09,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2018-10-27 00:51:09,622 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2018-10-27 00:51:09,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 00:51:09,626 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2018-10-27 00:51:09,626 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-27 00:51:09,626 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2018-10-27 00:51:09,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-10-27 00:51:09,628 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 00:51:09,628 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 00:51:09,628 INFO L424 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 00:51:09,628 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 00:51:09,628 INFO L82 PathProgramCache]: Analyzing trace with hash -1580609155, now seen corresponding path program 10 times [2018-10-27 00:51:09,628 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 00:51:09,629 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 00:51:09,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:51:09,629 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-27 00:51:09,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:51:09,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:51:09,745 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2018-10-27 00:51:09,746 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 00:51:09,746 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3449c345-ecc7-4290-b295-8b63994d4523/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 [2018-10-27 00:51:09,754 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-27 00:51:09,789 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-27 00:51:09,790 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-27 00:51:09,793 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 00:51:09,833 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2018-10-27 00:51:09,856 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-27 00:51:09,856 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-27 00:51:09,857 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-27 00:51:09,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-27 00:51:09,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2018-10-27 00:51:09,858 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 15 states. [2018-10-27 00:51:10,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 00:51:10,078 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2018-10-27 00:51:10,079 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-27 00:51:10,079 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 73 [2018-10-27 00:51:10,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 00:51:10,080 INFO L225 Difference]: With dead ends: 52 [2018-10-27 00:51:10,080 INFO L226 Difference]: Without dead ends: 48 [2018-10-27 00:51:10,081 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=236, Invalid=414, Unknown=0, NotChecked=0, Total=650 [2018-10-27 00:51:10,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-10-27 00:51:10,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-10-27 00:51:10,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-10-27 00:51:10,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2018-10-27 00:51:10,085 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2018-10-27 00:51:10,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 00:51:10,086 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2018-10-27 00:51:10,086 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-27 00:51:10,086 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2018-10-27 00:51:10,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-10-27 00:51:10,087 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 00:51:10,088 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 00:51:10,088 INFO L424 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 00:51:10,088 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 00:51:10,088 INFO L82 PathProgramCache]: Analyzing trace with hash -223837457, now seen corresponding path program 11 times [2018-10-27 00:51:10,088 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 00:51:10,088 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 00:51:10,089 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:51:10,092 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-27 00:51:10,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:51:10,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:51:10,333 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2018-10-27 00:51:10,333 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 00:51:10,333 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3449c345-ecc7-4290-b295-8b63994d4523/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 [2018-10-27 00:51:10,340 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-27 00:51:10,370 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-10-27 00:51:10,370 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-27 00:51:10,374 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 00:51:10,425 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2018-10-27 00:51:10,455 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-27 00:51:10,455 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-10-27 00:51:10,455 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-27 00:51:10,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-27 00:51:10,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2018-10-27 00:51:10,456 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 16 states. [2018-10-27 00:51:10,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 00:51:10,902 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2018-10-27 00:51:10,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-27 00:51:10,903 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 79 [2018-10-27 00:51:10,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 00:51:10,904 INFO L225 Difference]: With dead ends: 55 [2018-10-27 00:51:10,904 INFO L226 Difference]: Without dead ends: 51 [2018-10-27 00:51:10,904 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=275, Invalid=481, Unknown=0, NotChecked=0, Total=756 [2018-10-27 00:51:10,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-27 00:51:10,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-10-27 00:51:10,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-10-27 00:51:10,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2018-10-27 00:51:10,908 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2018-10-27 00:51:10,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 00:51:10,908 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2018-10-27 00:51:10,908 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-27 00:51:10,908 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2018-10-27 00:51:10,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-10-27 00:51:10,913 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 00:51:10,913 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 00:51:10,914 INFO L424 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 00:51:10,914 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 00:51:10,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1653931773, now seen corresponding path program 12 times [2018-10-27 00:51:10,914 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 00:51:10,914 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 00:51:10,915 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:51:10,915 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-27 00:51:10,915 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:51:10,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:51:11,210 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-10-27 00:51:11,211 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 00:51:11,211 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3449c345-ecc7-4290-b295-8b63994d4523/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 [2018-10-27 00:51:11,222 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-27 00:51:11,290 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-27 00:51:11,290 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-27 00:51:11,293 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 00:51:11,308 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-10-27 00:51:11,327 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-27 00:51:11,327 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-10-27 00:51:11,327 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-27 00:51:11,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-27 00:51:11,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=613, Unknown=0, NotChecked=0, Total=812 [2018-10-27 00:51:11,328 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 29 states. [2018-10-27 00:51:11,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 00:51:11,373 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2018-10-27 00:51:11,374 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-27 00:51:11,374 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 85 [2018-10-27 00:51:11,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 00:51:11,375 INFO L225 Difference]: With dead ends: 58 [2018-10-27 00:51:11,375 INFO L226 Difference]: Without dead ends: 54 [2018-10-27 00:51:11,375 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=199, Invalid=613, Unknown=0, NotChecked=0, Total=812 [2018-10-27 00:51:11,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-10-27 00:51:11,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-10-27 00:51:11,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-10-27 00:51:11,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2018-10-27 00:51:11,379 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2018-10-27 00:51:11,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 00:51:11,379 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2018-10-27 00:51:11,379 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-27 00:51:11,379 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2018-10-27 00:51:11,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-10-27 00:51:11,380 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 00:51:11,380 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 00:51:11,381 INFO L424 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 00:51:11,381 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 00:51:11,381 INFO L82 PathProgramCache]: Analyzing trace with hash -218674449, now seen corresponding path program 13 times [2018-10-27 00:51:11,381 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 00:51:11,381 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 00:51:11,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:51:11,382 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-27 00:51:11,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:51:11,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:51:11,773 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2018-10-27 00:51:11,773 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 00:51:11,773 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3449c345-ecc7-4290-b295-8b63994d4523/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 [2018-10-27 00:51:11,780 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 00:51:11,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:51:11,801 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 00:51:12,189 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2018-10-27 00:51:12,209 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-27 00:51:12,210 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 18] total 47 [2018-10-27 00:51:12,210 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-27 00:51:12,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-27 00:51:12,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=1811, Unknown=0, NotChecked=0, Total=2162 [2018-10-27 00:51:12,211 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 47 states. [2018-10-27 00:51:13,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 00:51:13,108 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2018-10-27 00:51:13,109 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-27 00:51:13,109 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 91 [2018-10-27 00:51:13,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 00:51:13,110 INFO L225 Difference]: With dead ends: 61 [2018-10-27 00:51:13,110 INFO L226 Difference]: Without dead ends: 57 [2018-10-27 00:51:13,111 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 957 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=993, Invalid=4409, Unknown=0, NotChecked=0, Total=5402 [2018-10-27 00:51:13,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-27 00:51:13,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-10-27 00:51:13,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-10-27 00:51:13,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2018-10-27 00:51:13,116 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2018-10-27 00:51:13,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 00:51:13,117 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2018-10-27 00:51:13,117 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-27 00:51:13,117 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2018-10-27 00:51:13,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-10-27 00:51:13,118 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 00:51:13,118 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 00:51:13,118 INFO L424 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 00:51:13,119 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 00:51:13,119 INFO L82 PathProgramCache]: Analyzing trace with hash 492436605, now seen corresponding path program 14 times [2018-10-27 00:51:13,119 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 00:51:13,119 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 00:51:13,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:51:13,120 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 00:51:13,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:51:13,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:51:13,456 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2018-10-27 00:51:13,457 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 00:51:13,457 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3449c345-ecc7-4290-b295-8b63994d4523/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 [2018-10-27 00:51:13,464 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-27 00:51:13,488 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-27 00:51:13,488 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-27 00:51:13,491 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 00:51:13,845 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2018-10-27 00:51:13,871 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-27 00:51:13,871 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 19] total 50 [2018-10-27 00:51:13,872 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-27 00:51:13,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-27 00:51:13,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=398, Invalid=2052, Unknown=0, NotChecked=0, Total=2450 [2018-10-27 00:51:13,873 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 50 states. [2018-10-27 00:51:14,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 00:51:14,528 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2018-10-27 00:51:14,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-27 00:51:14,529 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 97 [2018-10-27 00:51:14,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 00:51:14,530 INFO L225 Difference]: With dead ends: 64 [2018-10-27 00:51:14,530 INFO L226 Difference]: Without dead ends: 60 [2018-10-27 00:51:14,531 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1101 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1131, Invalid=5031, Unknown=0, NotChecked=0, Total=6162 [2018-10-27 00:51:14,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-10-27 00:51:14,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-10-27 00:51:14,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-10-27 00:51:14,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2018-10-27 00:51:14,535 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2018-10-27 00:51:14,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 00:51:14,536 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2018-10-27 00:51:14,536 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-27 00:51:14,536 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2018-10-27 00:51:14,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-10-27 00:51:14,539 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 00:51:14,540 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 00:51:14,540 INFO L424 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 00:51:14,540 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 00:51:14,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1083048687, now seen corresponding path program 15 times [2018-10-27 00:51:14,540 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 00:51:14,540 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 00:51:14,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:51:14,541 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-27 00:51:14,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:51:14,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:51:14,903 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2018-10-27 00:51:14,903 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 00:51:14,903 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3449c345-ecc7-4290-b295-8b63994d4523/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 [2018-10-27 00:51:14,911 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-27 00:51:14,948 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-10-27 00:51:14,948 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-27 00:51:14,951 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 00:51:15,390 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2018-10-27 00:51:15,413 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-27 00:51:15,413 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 20] total 53 [2018-10-27 00:51:15,413 INFO L460 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-27 00:51:15,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-27 00:51:15,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=448, Invalid=2308, Unknown=0, NotChecked=0, Total=2756 [2018-10-27 00:51:15,414 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 53 states. [2018-10-27 00:51:16,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 00:51:16,077 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2018-10-27 00:51:16,078 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-27 00:51:16,078 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 103 [2018-10-27 00:51:16,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 00:51:16,079 INFO L225 Difference]: With dead ends: 67 [2018-10-27 00:51:16,079 INFO L226 Difference]: Without dead ends: 63 [2018-10-27 00:51:16,080 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1255 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1278, Invalid=5694, Unknown=0, NotChecked=0, Total=6972 [2018-10-27 00:51:16,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-27 00:51:16,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-10-27 00:51:16,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-10-27 00:51:16,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2018-10-27 00:51:16,085 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 103 [2018-10-27 00:51:16,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 00:51:16,085 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2018-10-27 00:51:16,086 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-27 00:51:16,086 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2018-10-27 00:51:16,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-10-27 00:51:16,087 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 00:51:16,087 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 00:51:16,087 INFO L424 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 00:51:16,087 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 00:51:16,087 INFO L82 PathProgramCache]: Analyzing trace with hash 404015613, now seen corresponding path program 16 times [2018-10-27 00:51:16,088 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 00:51:16,088 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 00:51:16,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:51:16,088 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-27 00:51:16,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:51:16,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:51:16,470 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2018-10-27 00:51:16,470 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 00:51:16,470 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3449c345-ecc7-4290-b295-8b63994d4523/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 [2018-10-27 00:51:16,477 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-27 00:51:16,533 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-27 00:51:16,534 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-27 00:51:16,537 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 00:51:16,966 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2018-10-27 00:51:16,985 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-27 00:51:16,986 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 21] total 56 [2018-10-27 00:51:16,986 INFO L460 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-27 00:51:16,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-27 00:51:16,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=2579, Unknown=0, NotChecked=0, Total=3080 [2018-10-27 00:51:16,987 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 56 states. [2018-10-27 00:51:17,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 00:51:17,773 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2018-10-27 00:51:17,776 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-27 00:51:17,777 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 109 [2018-10-27 00:51:17,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 00:51:17,778 INFO L225 Difference]: With dead ends: 70 [2018-10-27 00:51:17,778 INFO L226 Difference]: Without dead ends: 66 [2018-10-27 00:51:17,779 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1419 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1434, Invalid=6398, Unknown=0, NotChecked=0, Total=7832 [2018-10-27 00:51:17,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-10-27 00:51:17,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-10-27 00:51:17,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-10-27 00:51:17,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2018-10-27 00:51:17,784 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 109 [2018-10-27 00:51:17,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 00:51:17,784 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2018-10-27 00:51:17,784 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-27 00:51:17,784 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2018-10-27 00:51:17,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-10-27 00:51:17,785 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 00:51:17,785 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 00:51:17,786 INFO L424 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 00:51:17,786 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 00:51:17,786 INFO L82 PathProgramCache]: Analyzing trace with hash -464475409, now seen corresponding path program 17 times [2018-10-27 00:51:17,786 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 00:51:17,786 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 00:51:17,787 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:51:17,787 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-27 00:51:17,787 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:51:17,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:51:18,422 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2018-10-27 00:51:18,423 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 00:51:18,423 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3449c345-ecc7-4290-b295-8b63994d4523/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 [2018-10-27 00:51:18,437 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-27 00:51:18,502 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-10-27 00:51:18,502 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-27 00:51:18,504 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 00:51:19,201 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2018-10-27 00:51:19,220 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-27 00:51:19,220 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 39] total 59 [2018-10-27 00:51:19,221 INFO L460 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-27 00:51:19,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-27 00:51:19,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=557, Invalid=2865, Unknown=0, NotChecked=0, Total=3422 [2018-10-27 00:51:19,222 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 59 states. [2018-10-27 00:51:20,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 00:51:20,107 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2018-10-27 00:51:20,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-27 00:51:20,108 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 115 [2018-10-27 00:51:20,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 00:51:20,109 INFO L225 Difference]: With dead ends: 73 [2018-10-27 00:51:20,109 INFO L226 Difference]: Without dead ends: 69 [2018-10-27 00:51:20,111 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1562 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1599, Invalid=7143, Unknown=0, NotChecked=0, Total=8742 [2018-10-27 00:51:20,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-27 00:51:20,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-10-27 00:51:20,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-10-27 00:51:20,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2018-10-27 00:51:20,116 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 115 [2018-10-27 00:51:20,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 00:51:20,116 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2018-10-27 00:51:20,116 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-27 00:51:20,116 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2018-10-27 00:51:20,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-10-27 00:51:20,117 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 00:51:20,117 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 00:51:20,121 INFO L424 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 00:51:20,121 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 00:51:20,121 INFO L82 PathProgramCache]: Analyzing trace with hash 130115453, now seen corresponding path program 18 times [2018-10-27 00:51:20,121 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 00:51:20,122 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 00:51:20,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:51:20,122 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-27 00:51:20,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:51:20,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:51:20,952 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2018-10-27 00:51:20,952 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 00:51:20,952 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3449c345-ecc7-4290-b295-8b63994d4523/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 [2018-10-27 00:51:20,959 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-27 00:51:20,990 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-27 00:51:20,991 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-27 00:51:20,993 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 00:51:21,624 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2018-10-27 00:51:21,644 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-27 00:51:21,645 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 41] total 62 [2018-10-27 00:51:21,645 INFO L460 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-27 00:51:21,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-27 00:51:21,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=616, Invalid=3166, Unknown=0, NotChecked=0, Total=3782 [2018-10-27 00:51:21,646 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 62 states. [2018-10-27 00:51:22,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 00:51:22,637 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2018-10-27 00:51:22,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-27 00:51:22,638 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 121 [2018-10-27 00:51:22,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 00:51:22,639 INFO L225 Difference]: With dead ends: 76 [2018-10-27 00:51:22,639 INFO L226 Difference]: Without dead ends: 72 [2018-10-27 00:51:22,640 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1744 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1773, Invalid=7929, Unknown=0, NotChecked=0, Total=9702 [2018-10-27 00:51:22,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-10-27 00:51:22,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-10-27 00:51:22,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-10-27 00:51:22,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2018-10-27 00:51:22,644 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 121 [2018-10-27 00:51:22,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 00:51:22,644 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2018-10-27 00:51:22,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-27 00:51:22,645 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2018-10-27 00:51:22,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-10-27 00:51:22,645 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 00:51:22,646 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 00:51:22,646 INFO L424 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 00:51:22,646 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 00:51:22,646 INFO L82 PathProgramCache]: Analyzing trace with hash -2010955025, now seen corresponding path program 19 times [2018-10-27 00:51:22,646 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 00:51:22,646 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 00:51:22,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:51:22,647 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-27 00:51:22,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:51:22,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:51:22,999 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2018-10-27 00:51:22,999 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 00:51:22,999 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3449c345-ecc7-4290-b295-8b63994d4523/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 [2018-10-27 00:51:23,007 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 00:51:23,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:51:23,033 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 00:51:23,065 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2018-10-27 00:51:23,082 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-27 00:51:23,082 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-10-27 00:51:23,082 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-27 00:51:23,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-27 00:51:23,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=317, Unknown=0, NotChecked=0, Total=552 [2018-10-27 00:51:23,083 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 24 states. [2018-10-27 00:51:23,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 00:51:23,441 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2018-10-27 00:51:23,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-27 00:51:23,441 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 127 [2018-10-27 00:51:23,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 00:51:23,442 INFO L225 Difference]: With dead ends: 79 [2018-10-27 00:51:23,442 INFO L226 Difference]: Without dead ends: 75 [2018-10-27 00:51:23,443 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=695, Invalid=1197, Unknown=0, NotChecked=0, Total=1892 [2018-10-27 00:51:23,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-10-27 00:51:23,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-10-27 00:51:23,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-10-27 00:51:23,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2018-10-27 00:51:23,450 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 127 [2018-10-27 00:51:23,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 00:51:23,451 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2018-10-27 00:51:23,451 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-27 00:51:23,451 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2018-10-27 00:51:23,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-10-27 00:51:23,454 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 00:51:23,454 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 00:51:23,454 INFO L424 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 00:51:23,454 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 00:51:23,454 INFO L82 PathProgramCache]: Analyzing trace with hash -799288067, now seen corresponding path program 20 times [2018-10-27 00:51:23,454 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 00:51:23,455 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 00:51:23,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:51:23,455 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 00:51:23,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:51:23,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:51:23,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2018-10-27 00:51:23,963 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 00:51:23,963 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3449c345-ecc7-4290-b295-8b63994d4523/bin-2019/uautomizer/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 00:51:23,977 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-27 00:51:24,000 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-27 00:51:24,000 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-27 00:51:24,003 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 00:51:24,030 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2018-10-27 00:51:24,047 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-27 00:51:24,047 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-10-27 00:51:24,047 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-27 00:51:24,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-27 00:51:24,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=343, Unknown=0, NotChecked=0, Total=600 [2018-10-27 00:51:24,048 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 25 states. [2018-10-27 00:51:24,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 00:51:24,298 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2018-10-27 00:51:24,301 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-27 00:51:24,302 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 133 [2018-10-27 00:51:24,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 00:51:24,303 INFO L225 Difference]: With dead ends: 82 [2018-10-27 00:51:24,303 INFO L226 Difference]: Without dead ends: 78 [2018-10-27 00:51:24,303 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=761, Invalid=1309, Unknown=0, NotChecked=0, Total=2070 [2018-10-27 00:51:24,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-10-27 00:51:24,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-10-27 00:51:24,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-10-27 00:51:24,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2018-10-27 00:51:24,308 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 133 [2018-10-27 00:51:24,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 00:51:24,308 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2018-10-27 00:51:24,308 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-27 00:51:24,309 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2018-10-27 00:51:24,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2018-10-27 00:51:24,314 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 00:51:24,314 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 00:51:24,315 INFO L424 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 00:51:24,315 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 00:51:24,315 INFO L82 PathProgramCache]: Analyzing trace with hash -1226192145, now seen corresponding path program 21 times [2018-10-27 00:51:24,315 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 00:51:24,315 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 00:51:24,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:51:24,316 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-27 00:51:24,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:51:24,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:51:24,593 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2018-10-27 00:51:24,593 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 00:51:24,593 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3449c345-ecc7-4290-b295-8b63994d4523/bin-2019/uautomizer/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 00:51:24,600 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-27 00:51:24,645 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-10-27 00:51:24,645 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-27 00:51:24,648 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 00:51:24,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2018-10-27 00:51:24,693 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-27 00:51:24,693 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-10-27 00:51:24,693 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-27 00:51:24,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-27 00:51:24,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=370, Unknown=0, NotChecked=0, Total=650 [2018-10-27 00:51:24,694 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 26 states. [2018-10-27 00:51:25,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 00:51:25,053 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2018-10-27 00:51:25,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-27 00:51:25,058 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 139 [2018-10-27 00:51:25,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 00:51:25,059 INFO L225 Difference]: With dead ends: 85 [2018-10-27 00:51:25,059 INFO L226 Difference]: Without dead ends: 81 [2018-10-27 00:51:25,059 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=830, Invalid=1426, Unknown=0, NotChecked=0, Total=2256 [2018-10-27 00:51:25,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-10-27 00:51:25,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-10-27 00:51:25,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-10-27 00:51:25,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2018-10-27 00:51:25,064 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 139 [2018-10-27 00:51:25,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 00:51:25,064 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2018-10-27 00:51:25,065 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-27 00:51:25,065 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2018-10-27 00:51:25,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2018-10-27 00:51:25,070 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 00:51:25,070 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 00:51:25,071 INFO L424 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 00:51:25,071 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 00:51:25,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1155535485, now seen corresponding path program 22 times [2018-10-27 00:51:25,071 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 00:51:25,071 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 00:51:25,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:51:25,072 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-27 00:51:25,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:51:25,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:51:25,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2018-10-27 00:51:25,528 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 00:51:25,528 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3449c345-ecc7-4290-b295-8b63994d4523/bin-2019/uautomizer/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 00:51:25,535 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-27 00:51:25,566 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-27 00:51:25,567 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-27 00:51:25,570 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 00:51:25,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2018-10-27 00:51:25,624 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-27 00:51:25,624 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-10-27 00:51:25,624 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-27 00:51:25,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-27 00:51:25,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=398, Unknown=0, NotChecked=0, Total=702 [2018-10-27 00:51:25,625 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 27 states. [2018-10-27 00:51:25,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 00:51:25,995 INFO L93 Difference]: Finished difference Result 88 states and 89 transitions. [2018-10-27 00:51:25,996 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-27 00:51:25,996 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 145 [2018-10-27 00:51:25,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 00:51:25,997 INFO L225 Difference]: With dead ends: 88 [2018-10-27 00:51:25,997 INFO L226 Difference]: Without dead ends: 84 [2018-10-27 00:51:25,998 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=902, Invalid=1548, Unknown=0, NotChecked=0, Total=2450 [2018-10-27 00:51:25,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-10-27 00:51:26,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-10-27 00:51:26,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-10-27 00:51:26,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2018-10-27 00:51:26,005 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 145 [2018-10-27 00:51:26,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 00:51:26,005 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2018-10-27 00:51:26,005 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-27 00:51:26,005 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2018-10-27 00:51:26,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2018-10-27 00:51:26,006 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 00:51:26,006 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 00:51:26,007 INFO L424 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 00:51:26,007 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 00:51:26,007 INFO L82 PathProgramCache]: Analyzing trace with hash 478692079, now seen corresponding path program 23 times [2018-10-27 00:51:26,007 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 00:51:26,007 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 00:51:26,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:51:26,008 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-27 00:51:26,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:51:26,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:51:26,540 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2018-10-27 00:51:26,540 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 00:51:26,540 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3449c345-ecc7-4290-b295-8b63994d4523/bin-2019/uautomizer/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 00:51:26,548 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-27 00:51:26,595 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-10-27 00:51:26,595 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-27 00:51:26,598 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 00:51:26,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2018-10-27 00:51:26,663 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-27 00:51:26,663 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-10-27 00:51:26,663 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-27 00:51:26,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-27 00:51:26,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=427, Unknown=0, NotChecked=0, Total=756 [2018-10-27 00:51:26,664 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand 28 states. [2018-10-27 00:51:26,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 00:51:26,978 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2018-10-27 00:51:26,978 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-27 00:51:26,979 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 151 [2018-10-27 00:51:26,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 00:51:26,980 INFO L225 Difference]: With dead ends: 91 [2018-10-27 00:51:26,980 INFO L226 Difference]: Without dead ends: 87 [2018-10-27 00:51:26,980 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=977, Invalid=1675, Unknown=0, NotChecked=0, Total=2652 [2018-10-27 00:51:26,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-10-27 00:51:26,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-10-27 00:51:26,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-10-27 00:51:26,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2018-10-27 00:51:26,984 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 151 [2018-10-27 00:51:26,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 00:51:26,984 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2018-10-27 00:51:26,984 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-27 00:51:26,984 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2018-10-27 00:51:26,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2018-10-27 00:51:26,985 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 00:51:26,985 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 00:51:26,989 INFO L424 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 00:51:26,990 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 00:51:26,990 INFO L82 PathProgramCache]: Analyzing trace with hash -414572547, now seen corresponding path program 24 times [2018-10-27 00:51:26,990 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 00:51:26,990 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 00:51:26,990 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:51:26,991 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-27 00:51:26,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:51:27,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 00:51:27,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2018-10-27 00:51:27,472 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 00:51:27,472 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3449c345-ecc7-4290-b295-8b63994d4523/bin-2019/uautomizer/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 00:51:27,480 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-27 00:51:27,744 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-10-27 00:51:27,745 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-27 00:51:27,748 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 00:51:27,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2018-10-27 00:51:27,814 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-27 00:51:27,814 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-10-27 00:51:27,814 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-27 00:51:27,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-27 00:51:27,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=457, Unknown=0, NotChecked=0, Total=812 [2018-10-27 00:51:27,815 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 29 states. [2018-10-27 00:51:28,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 00:51:28,246 INFO L93 Difference]: Finished difference Result 94 states and 95 transitions. [2018-10-27 00:51:28,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-27 00:51:28,247 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 157 [2018-10-27 00:51:28,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 00:51:28,248 INFO L225 Difference]: With dead ends: 94 [2018-10-27 00:51:28,248 INFO L226 Difference]: Without dead ends: 90 [2018-10-27 00:51:28,249 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1055, Invalid=1807, Unknown=0, NotChecked=0, Total=2862 [2018-10-27 00:51:28,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-10-27 00:51:28,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-10-27 00:51:28,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-10-27 00:51:28,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2018-10-27 00:51:28,253 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 157 [2018-10-27 00:51:28,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 00:51:28,253 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2018-10-27 00:51:28,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-27 00:51:28,253 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2018-10-27 00:51:28,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2018-10-27 00:51:28,254 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 00:51:28,254 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 00:51:28,254 INFO L424 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 00:51:28,255 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 00:51:28,255 INFO L82 PathProgramCache]: Analyzing trace with hash -975000849, now seen corresponding path program 25 times [2018-10-27 00:51:28,255 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 00:51:28,255 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 00:51:28,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:51:28,256 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-27 00:51:28,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 00:51:28,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 00:51:28,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 00:51:28,313 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-10-27 00:51:28,361 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 12:51:28 BoogieIcfgContainer [2018-10-27 00:51:28,362 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-27 00:51:28,363 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-10-27 00:51:28,363 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-10-27 00:51:28,363 INFO L276 PluginConnector]: Witness Printer initialized [2018-10-27 00:51:28,365 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:51:03" (3/4) ... [2018-10-27 00:51:28,368 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-10-27 00:51:28,441 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_3449c345-ecc7-4290-b295-8b63994d4523/bin-2019/uautomizer/witness.graphml [2018-10-27 00:51:28,441 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-10-27 00:51:28,443 INFO L168 Benchmark]: Toolchain (without parser) took 25942.24 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 315.6 MB). Free memory was 961.8 MB in the beginning and 1.1 GB in the end (delta: -90.9 MB). Peak memory consumption was 224.7 MB. Max. memory is 11.5 GB. [2018-10-27 00:51:28,444 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-27 00:51:28,444 INFO L168 Benchmark]: CACSL2BoogieTranslator took 189.14 ms. Allocated memory is still 1.0 GB. Free memory was 961.8 MB in the beginning and 951.1 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-10-27 00:51:28,445 INFO L168 Benchmark]: Boogie Preprocessor took 25.48 ms. Allocated memory is still 1.0 GB. Free memory is still 951.1 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-27 00:51:28,445 INFO L168 Benchmark]: RCFGBuilder took 440.27 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 153.6 MB). Free memory was 951.1 MB in the beginning and 1.1 GB in the end (delta: -190.3 MB). Peak memory consumption was 22.7 MB. Max. memory is 11.5 GB. [2018-10-27 00:51:28,445 INFO L168 Benchmark]: TraceAbstraction took 25204.14 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 162.0 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 77.1 MB). Peak memory consumption was 239.1 MB. Max. memory is 11.5 GB. [2018-10-27 00:51:28,445 INFO L168 Benchmark]: Witness Printer took 78.01 ms. Allocated memory is still 1.3 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 8.8 MB). Peak memory consumption was 8.8 MB. Max. memory is 11.5 GB. [2018-10-27 00:51:28,447 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 189.14 ms. Allocated memory is still 1.0 GB. Free memory was 961.8 MB in the beginning and 951.1 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 25.48 ms. Allocated memory is still 1.0 GB. Free memory is still 951.1 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 440.27 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 153.6 MB). Free memory was 951.1 MB in the beginning and 1.1 GB in the end (delta: -190.3 MB). Peak memory consumption was 22.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 25204.14 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 162.0 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 77.1 MB). Peak memory consumption was 239.1 MB. Max. memory is 11.5 GB. * Witness Printer took 78.01 ms. Allocated memory is still 1.3 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 8.8 MB). Peak memory consumption was 8.8 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] int input = 25; VAL [input=25] [L11] CALL, EXPR id(input) VAL [\old(x)=25] [L5] COND FALSE !(x==0) VAL [\old(x)=25, x=25] [L6] CALL, EXPR id(x-1) VAL [\old(x)=24] [L5] COND FALSE !(x==0) VAL [\old(x)=24, x=24] [L6] CALL, EXPR id(x-1) VAL [\old(x)=23] [L5] COND FALSE !(x==0) VAL [\old(x)=23, x=23] [L6] CALL, EXPR id(x-1) VAL [\old(x)=22] [L5] COND FALSE !(x==0) VAL [\old(x)=22, x=22] [L6] CALL, EXPR id(x-1) VAL [\old(x)=21] [L5] COND FALSE !(x==0) VAL [\old(x)=21, x=21] [L6] CALL, EXPR id(x-1) 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; [L6] EXPR id(x-1) VAL [\old(x)=21, id(x-1)=20, x=21] [L6] RET return id(x-1) + 1; [L6] EXPR id(x-1) VAL [\old(x)=22, id(x-1)=21, x=22] [L6] RET return id(x-1) + 1; [L6] EXPR id(x-1) VAL [\old(x)=23, id(x-1)=22, x=23] [L6] RET return id(x-1) + 1; [L6] EXPR id(x-1) VAL [\old(x)=24, id(x-1)=23, x=24] [L6] RET return id(x-1) + 1; [L6] EXPR id(x-1) VAL [\old(x)=25, id(x-1)=24, x=25] [L6] RET return id(x-1) + 1; [L11] EXPR id(input) VAL [id(input)=25, input=25] [L11] int result = id(input); [L12] COND TRUE result == 25 VAL [input=25, result=25] [L13] __VERIFIER_error() VAL [input=25, result=25] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. UNSAFE Result, 25.1s OverallTime, 26 OverallIterations, 26 TraceHistogramMax, 10.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 326 SDtfs, 602 SDslu, 5076 SDs, 0 SdLazy, 2907 SolverSat, 166 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3230 GetRequests, 2161 SyntacticMatches, 0 SemanticMatches, 1069 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10899 ImplicationChecksByTransitivity, 17.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=90occurred in iteration=25, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 25 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 1.3s SatisfiabilityAnalysisTime, 12.1s InterpolantComputationTime, 4400 NumberOfCodeBlocks, 4400 NumberOfCodeBlocksAsserted, 222 NumberOfCheckSat, 4188 ConstructedInterpolants, 0 QuantifiedInterpolants, 1084776 SizeOfPredicates, 278 NumberOfNonLiveVariables, 4968 ConjunctsInSsa, 696 ConjunctsInUnsatCore, 49 InterpolantComputations, 1 PerfectInterpolantSequences, 15000/30000 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...