./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/recursive/Fibonacci04_false-unreach-call_true-no-overflow_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_eb64dea4-f845-4a99-94bf-540169bb37c3/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_eb64dea4-f845-4a99-94bf-540169bb37c3/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_eb64dea4-f845-4a99-94bf-540169bb37c3/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_eb64dea4-f845-4a99-94bf-540169bb37c3/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive/Fibonacci04_false-unreach-call_true-no-overflow_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_eb64dea4-f845-4a99-94bf-540169bb37c3/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_eb64dea4-f845-4a99-94bf-540169bb37c3/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 d3562c726fb0df5872bc6ae08c11ec0d40862c19 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.23-1dbac8b [2018-11-10 05:43:54,033 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-10 05:43:54,034 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-10 05:43:54,040 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-10 05:43:54,041 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-10 05:43:54,041 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-10 05:43:54,042 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-10 05:43:54,043 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-10 05:43:54,044 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-10 05:43:54,045 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-10 05:43:54,045 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-10 05:43:54,046 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-10 05:43:54,046 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-10 05:43:54,047 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-10 05:43:54,047 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-10 05:43:54,048 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-10 05:43:54,048 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-10 05:43:54,049 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-10 05:43:54,050 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-10 05:43:54,051 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-10 05:43:54,051 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-10 05:43:54,052 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-10 05:43:54,053 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-10 05:43:54,053 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-10 05:43:54,053 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-10 05:43:54,054 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-10 05:43:54,054 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-10 05:43:54,054 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-10 05:43:54,055 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-10 05:43:54,056 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-10 05:43:54,056 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-10 05:43:54,056 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-10 05:43:54,057 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-10 05:43:54,057 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-10 05:43:54,057 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-10 05:43:54,058 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-10 05:43:54,058 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_eb64dea4-f845-4a99-94bf-540169bb37c3/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-11-10 05:43:54,065 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-10 05:43:54,065 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-10 05:43:54,065 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-10 05:43:54,066 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-11-10 05:43:54,066 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-10 05:43:54,066 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-10 05:43:54,066 INFO L133 SettingsManager]: * Use SBE=true [2018-11-10 05:43:54,066 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-10 05:43:54,066 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-10 05:43:54,066 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-10 05:43:54,066 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-10 05:43:54,066 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-10 05:43:54,067 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-10 05:43:54,067 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-10 05:43:54,067 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-10 05:43:54,067 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-10 05:43:54,067 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-10 05:43:54,067 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-10 05:43:54,067 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-10 05:43:54,067 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-10 05:43:54,068 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-10 05:43:54,068 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-10 05:43:54,068 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-10 05:43:54,068 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-10 05:43:54,068 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-10 05:43:54,068 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-10 05:43:54,069 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-10 05:43:54,069 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-10 05:43:54,069 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-10 05:43:54,069 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_eb64dea4-f845-4a99-94bf-540169bb37c3/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 -> d3562c726fb0df5872bc6ae08c11ec0d40862c19 [2018-11-10 05:43:54,092 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-10 05:43:54,102 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-10 05:43:54,104 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-10 05:43:54,106 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-10 05:43:54,106 INFO L276 PluginConnector]: CDTParser initialized [2018-11-10 05:43:54,106 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_eb64dea4-f845-4a99-94bf-540169bb37c3/bin-2019/uautomizer/../../sv-benchmarks/c/recursive/Fibonacci04_false-unreach-call_true-no-overflow_true-termination.c [2018-11-10 05:43:54,155 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_eb64dea4-f845-4a99-94bf-540169bb37c3/bin-2019/uautomizer/data/bee8db6b4/dbce374bb21f47fbbb8bcf85b6d5ccfd/FLAGda7cd0d95 [2018-11-10 05:43:54,493 INFO L298 CDTParser]: Found 1 translation units. [2018-11-10 05:43:54,493 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_eb64dea4-f845-4a99-94bf-540169bb37c3/sv-benchmarks/c/recursive/Fibonacci04_false-unreach-call_true-no-overflow_true-termination.c [2018-11-10 05:43:54,497 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_eb64dea4-f845-4a99-94bf-540169bb37c3/bin-2019/uautomizer/data/bee8db6b4/dbce374bb21f47fbbb8bcf85b6d5ccfd/FLAGda7cd0d95 [2018-11-10 05:43:54,508 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_eb64dea4-f845-4a99-94bf-540169bb37c3/bin-2019/uautomizer/data/bee8db6b4/dbce374bb21f47fbbb8bcf85b6d5ccfd [2018-11-10 05:43:54,510 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-10 05:43:54,510 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-10 05:43:54,511 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-10 05:43:54,511 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-10 05:43:54,517 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-10 05:43:54,518 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 05:43:54" (1/1) ... [2018-11-10 05:43:54,519 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4cf656f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:43:54, skipping insertion in model container [2018-11-10 05:43:54,520 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 05:43:54" (1/1) ... [2018-11-10 05:43:54,526 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-10 05:43:54,536 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-10 05:43:54,635 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 05:43:54,637 INFO L189 MainTranslator]: Completed pre-run [2018-11-10 05:43:54,646 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 05:43:54,655 INFO L193 MainTranslator]: Completed translation [2018-11-10 05:43:54,655 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:43:54 WrapperNode [2018-11-10 05:43:54,655 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-10 05:43:54,656 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-10 05:43:54,656 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-10 05:43:54,656 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-10 05:43:54,663 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:43:54" (1/1) ... [2018-11-10 05:43:54,663 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:43:54" (1/1) ... [2018-11-10 05:43:54,666 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:43:54" (1/1) ... [2018-11-10 05:43:54,666 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:43:54" (1/1) ... [2018-11-10 05:43:54,668 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:43:54" (1/1) ... [2018-11-10 05:43:54,670 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:43:54" (1/1) ... [2018-11-10 05:43:54,670 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:43:54" (1/1) ... [2018-11-10 05:43:54,671 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-10 05:43:54,672 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-10 05:43:54,672 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-10 05:43:54,672 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-10 05:43:54,672 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:43:54" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_eb64dea4-f845-4a99-94bf-540169bb37c3/bin-2019/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-10 05:43:54,740 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-10 05:43:54,740 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-10 05:43:54,740 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2018-11-10 05:43:54,740 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-10 05:43:54,740 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-11-10 05:43:54,740 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-11-10 05:43:54,740 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2018-11-10 05:43:54,741 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-10 05:43:54,741 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-10 05:43:54,741 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-10 05:43:54,832 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-10 05:43:54,832 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 05:43:54 BoogieIcfgContainer [2018-11-10 05:43:54,832 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-10 05:43:54,833 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-10 05:43:54,833 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-10 05:43:54,835 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-10 05:43:54,835 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 05:43:54" (1/3) ... [2018-11-10 05:43:54,836 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7449aa88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 05:43:54, skipping insertion in model container [2018-11-10 05:43:54,836 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:43:54" (2/3) ... [2018-11-10 05:43:54,836 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7449aa88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 05:43:54, skipping insertion in model container [2018-11-10 05:43:54,836 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 05:43:54" (3/3) ... [2018-11-10 05:43:54,837 INFO L112 eAbstractionObserver]: Analyzing ICFG Fibonacci04_false-unreach-call_true-no-overflow_true-termination.c [2018-11-10 05:43:54,843 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-10 05:43:54,848 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-10 05:43:54,856 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-10 05:43:54,875 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-11-10 05:43:54,876 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-10 05:43:54,876 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-10 05:43:54,876 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-10 05:43:54,876 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-10 05:43:54,876 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-10 05:43:54,876 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-10 05:43:54,876 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-10 05:43:54,876 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-10 05:43:54,890 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2018-11-10 05:43:54,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-10 05:43:54,895 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:43:54,896 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 05:43:54,897 INFO L424 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:43:54,902 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:43:54,902 INFO L82 PathProgramCache]: Analyzing trace with hash -1356498376, now seen corresponding path program 1 times [2018-11-10 05:43:54,904 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 05:43:54,904 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 05:43:54,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:43:54,941 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:43:54,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:43:54,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:43:55,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 05:43:55,018 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 05:43:55,018 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-10 05:43:55,022 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-10 05:43:55,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-10 05:43:55,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-10 05:43:55,034 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 5 states. [2018-11-10 05:43:55,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:43:55,109 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2018-11-10 05:43:55,110 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-10 05:43:55,111 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-11-10 05:43:55,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:43:55,118 INFO L225 Difference]: With dead ends: 35 [2018-11-10 05:43:55,118 INFO L226 Difference]: Without dead ends: 21 [2018-11-10 05:43:55,120 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-10 05:43:55,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-11-10 05:43:55,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-11-10 05:43:55,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-11-10 05:43:55,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2018-11-10 05:43:55,145 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2018-11-10 05:43:55,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:43:55,145 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2018-11-10 05:43:55,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-10 05:43:55,146 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2018-11-10 05:43:55,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-11-10 05:43:55,147 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:43:55,147 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 05:43:55,147 INFO L424 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:43:55,147 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:43:55,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1591396412, now seen corresponding path program 1 times [2018-11-10 05:43:55,147 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 05:43:55,147 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 05:43:55,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:43:55,148 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:43:55,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:43:55,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:43:55,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 05:43:55,189 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 05:43:55,189 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-10 05:43:55,190 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-10 05:43:55,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-10 05:43:55,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-10 05:43:55,191 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 5 states. [2018-11-10 05:43:55,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:43:55,263 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2018-11-10 05:43:55,264 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-10 05:43:55,264 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-11-10 05:43:55,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:43:55,264 INFO L225 Difference]: With dead ends: 27 [2018-11-10 05:43:55,265 INFO L226 Difference]: Without dead ends: 23 [2018-11-10 05:43:55,265 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-10 05:43:55,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-11-10 05:43:55,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2018-11-10 05:43:55,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-11-10 05:43:55,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2018-11-10 05:43:55,270 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14 [2018-11-10 05:43:55,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:43:55,270 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2018-11-10 05:43:55,270 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-10 05:43:55,271 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2018-11-10 05:43:55,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-11-10 05:43:55,271 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:43:55,272 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 05:43:55,272 INFO L424 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:43:55,272 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:43:55,272 INFO L82 PathProgramCache]: Analyzing trace with hash -1761048597, now seen corresponding path program 1 times [2018-11-10 05:43:55,272 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 05:43:55,272 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 05:43:55,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:43:55,273 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:43:55,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:43:55,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:43:55,323 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-10 05:43:55,323 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 05:43:55,323 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_eb64dea4-f845-4a99-94bf-540169bb37c3/bin-2019/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 05:43:55,341 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:43:55,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:43:55,364 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:43:55,406 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-10 05:43:55,424 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 05:43:55,424 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2018-11-10 05:43:55,425 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-10 05:43:55,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-10 05:43:55,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2018-11-10 05:43:55,425 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 8 states. [2018-11-10 05:43:55,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:43:55,512 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2018-11-10 05:43:55,513 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-10 05:43:55,513 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2018-11-10 05:43:55,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:43:55,514 INFO L225 Difference]: With dead ends: 38 [2018-11-10 05:43:55,514 INFO L226 Difference]: Without dead ends: 23 [2018-11-10 05:43:55,514 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2018-11-10 05:43:55,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-11-10 05:43:55,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-11-10 05:43:55,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-11-10 05:43:55,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2018-11-10 05:43:55,519 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 26 [2018-11-10 05:43:55,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:43:55,519 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2018-11-10 05:43:55,519 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-10 05:43:55,520 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2018-11-10 05:43:55,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-11-10 05:43:55,520 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:43:55,521 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 05:43:55,521 INFO L424 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:43:55,521 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:43:55,521 INFO L82 PathProgramCache]: Analyzing trace with hash -624449707, now seen corresponding path program 1 times [2018-11-10 05:43:55,521 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 05:43:55,521 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 05:43:55,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:43:55,522 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:43:55,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:43:55,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:43:55,569 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-10 05:43:55,569 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 05:43:55,569 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_eb64dea4-f845-4a99-94bf-540169bb37c3/bin-2019/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 05:43:55,575 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:43:55,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:43:55,585 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:43:55,592 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-10 05:43:55,607 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 05:43:55,608 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-11-10 05:43:55,608 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-10 05:43:55,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-10 05:43:55,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-11-10 05:43:55,608 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 6 states. [2018-11-10 05:43:55,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:43:55,654 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2018-11-10 05:43:55,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-10 05:43:55,654 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2018-11-10 05:43:55,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:43:55,656 INFO L225 Difference]: With dead ends: 32 [2018-11-10 05:43:55,656 INFO L226 Difference]: Without dead ends: 28 [2018-11-10 05:43:55,656 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-11-10 05:43:55,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-11-10 05:43:55,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-11-10 05:43:55,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-11-10 05:43:55,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2018-11-10 05:43:55,662 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 27 [2018-11-10 05:43:55,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:43:55,662 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2018-11-10 05:43:55,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-10 05:43:55,662 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2018-11-10 05:43:55,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-11-10 05:43:55,664 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:43:55,664 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 05:43:55,664 INFO L424 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:43:55,664 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:43:55,664 INFO L82 PathProgramCache]: Analyzing trace with hash -111055954, now seen corresponding path program 2 times [2018-11-10 05:43:55,664 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 05:43:55,664 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 05:43:55,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:43:55,665 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:43:55,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:43:55,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:43:55,705 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-11-10 05:43:55,705 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 05:43:55,705 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_eb64dea4-f845-4a99-94bf-540169bb37c3/bin-2019/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 05:43:55,717 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-10 05:43:55,732 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-10 05:43:55,732 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 05:43:55,734 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:43:55,792 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-11-10 05:43:55,817 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 05:43:55,817 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2018-11-10 05:43:55,817 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-10 05:43:55,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-10 05:43:55,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2018-11-10 05:43:55,818 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand 9 states. [2018-11-10 05:43:55,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:43:55,899 INFO L93 Difference]: Finished difference Result 42 states and 62 transitions. [2018-11-10 05:43:55,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-10 05:43:55,899 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 40 [2018-11-10 05:43:55,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:43:55,900 INFO L225 Difference]: With dead ends: 42 [2018-11-10 05:43:55,901 INFO L226 Difference]: Without dead ends: 36 [2018-11-10 05:43:55,901 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2018-11-10 05:43:55,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-11-10 05:43:55,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2018-11-10 05:43:55,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-11-10 05:43:55,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 49 transitions. [2018-11-10 05:43:55,908 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 49 transitions. Word has length 40 [2018-11-10 05:43:55,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:43:55,908 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 49 transitions. [2018-11-10 05:43:55,908 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-10 05:43:55,908 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 49 transitions. [2018-11-10 05:43:55,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-11-10 05:43:55,910 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:43:55,911 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 11, 6, 6, 6, 6, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 05:43:55,911 INFO L424 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:43:55,911 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:43:55,911 INFO L82 PathProgramCache]: Analyzing trace with hash -987229488, now seen corresponding path program 3 times [2018-11-10 05:43:55,911 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 05:43:55,911 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 05:43:55,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:43:55,912 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 05:43:55,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:43:55,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:43:56,040 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 176 proven. 28 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2018-11-10 05:43:56,040 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 05:43:56,040 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_eb64dea4-f845-4a99-94bf-540169bb37c3/bin-2019/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 05:43:56,048 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-10 05:43:56,108 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-11-10 05:43:56,108 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 05:43:56,112 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:43:56,153 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 174 proven. 17 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2018-11-10 05:43:56,179 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 05:43:56,179 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 12 [2018-11-10 05:43:56,180 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-10 05:43:56,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-10 05:43:56,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2018-11-10 05:43:56,180 INFO L87 Difference]: Start difference. First operand 33 states and 49 transitions. Second operand 12 states. [2018-11-10 05:43:56,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:43:56,349 INFO L93 Difference]: Finished difference Result 76 states and 143 transitions. [2018-11-10 05:43:56,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-10 05:43:56,350 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 96 [2018-11-10 05:43:56,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:43:56,351 INFO L225 Difference]: With dead ends: 76 [2018-11-10 05:43:56,351 INFO L226 Difference]: Without dead ends: 49 [2018-11-10 05:43:56,352 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2018-11-10 05:43:56,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-11-10 05:43:56,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2018-11-10 05:43:56,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-11-10 05:43:56,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 63 transitions. [2018-11-10 05:43:56,361 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 63 transitions. Word has length 96 [2018-11-10 05:43:56,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:43:56,361 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 63 transitions. [2018-11-10 05:43:56,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-10 05:43:56,362 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 63 transitions. [2018-11-10 05:43:56,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-11-10 05:43:56,363 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:43:56,363 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 7, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 05:43:56,364 INFO L424 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:43:56,364 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:43:56,364 INFO L82 PathProgramCache]: Analyzing trace with hash -383842586, now seen corresponding path program 4 times [2018-11-10 05:43:56,364 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 05:43:56,364 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 05:43:56,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:43:56,365 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 05:43:56,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:43:56,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:43:56,426 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 66 proven. 25 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2018-11-10 05:43:56,426 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 05:43:56,426 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_eb64dea4-f845-4a99-94bf-540169bb37c3/bin-2019/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 05:43:56,432 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-10 05:43:56,447 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-10 05:43:56,447 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 05:43:56,450 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:43:56,470 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 17 proven. 88 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-11-10 05:43:56,486 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 05:43:56,486 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 8 [2018-11-10 05:43:56,487 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-10 05:43:56,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-10 05:43:56,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-11-10 05:43:56,487 INFO L87 Difference]: Start difference. First operand 43 states and 63 transitions. Second operand 8 states. [2018-11-10 05:43:56,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:43:56,564 INFO L93 Difference]: Finished difference Result 52 states and 81 transitions. [2018-11-10 05:43:56,564 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-10 05:43:56,565 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 68 [2018-11-10 05:43:56,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:43:56,566 INFO L225 Difference]: With dead ends: 52 [2018-11-10 05:43:56,566 INFO L226 Difference]: Without dead ends: 48 [2018-11-10 05:43:56,567 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2018-11-10 05:43:56,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-11-10 05:43:56,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-11-10 05:43:56,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-11-10 05:43:56,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 77 transitions. [2018-11-10 05:43:56,575 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 77 transitions. Word has length 68 [2018-11-10 05:43:56,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:43:56,575 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 77 transitions. [2018-11-10 05:43:56,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-10 05:43:56,575 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 77 transitions. [2018-11-10 05:43:56,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2018-11-10 05:43:56,577 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:43:56,577 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 23, 13, 13, 13, 13, 13, 13, 13, 10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 05:43:56,578 INFO L424 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:43:56,578 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:43:56,578 INFO L82 PathProgramCache]: Analyzing trace with hash 995062905, now seen corresponding path program 5 times [2018-11-10 05:43:56,578 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 05:43:56,578 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 05:43:56,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:43:56,579 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 05:43:56,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:43:56,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:43:56,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1969 backedges. 195 proven. 269 refuted. 0 times theorem prover too weak. 1505 trivial. 0 not checked. [2018-11-10 05:43:56,687 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 05:43:56,687 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_eb64dea4-f845-4a99-94bf-540169bb37c3/bin-2019/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 05:43:56,699 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-10 05:43:56,732 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-11-10 05:43:56,732 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 05:43:56,738 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:43:56,765 INFO L134 CoverageAnalysis]: Checked inductivity of 1969 backedges. 958 proven. 4 refuted. 0 times theorem prover too weak. 1007 trivial. 0 not checked. [2018-11-10 05:43:56,790 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 05:43:56,790 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-11-10 05:43:56,791 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-10 05:43:56,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-10 05:43:56,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-11-10 05:43:56,792 INFO L87 Difference]: Start difference. First operand 48 states and 77 transitions. Second operand 7 states. [2018-11-10 05:43:56,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:43:56,887 INFO L93 Difference]: Finished difference Result 88 states and 156 transitions. [2018-11-10 05:43:56,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-10 05:43:56,888 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 192 [2018-11-10 05:43:56,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:43:56,889 INFO L225 Difference]: With dead ends: 88 [2018-11-10 05:43:56,889 INFO L226 Difference]: Without dead ends: 45 [2018-11-10 05:43:56,890 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2018-11-10 05:43:56,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-11-10 05:43:56,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-11-10 05:43:56,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-11-10 05:43:56,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 60 transitions. [2018-11-10 05:43:56,894 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 60 transitions. Word has length 192 [2018-11-10 05:43:56,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:43:56,894 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 60 transitions. [2018-11-10 05:43:56,894 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-10 05:43:56,894 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 60 transitions. [2018-11-10 05:43:56,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-11-10 05:43:56,896 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:43:56,896 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 14, 8, 8, 8, 8, 8, 8, 8, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 05:43:56,896 INFO L424 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:43:56,896 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:43:56,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1737041458, now seen corresponding path program 6 times [2018-11-10 05:43:56,896 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 05:43:56,897 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 05:43:56,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:43:56,897 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 05:43:56,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:43:56,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:43:57,000 INFO L134 CoverageAnalysis]: Checked inductivity of 747 backedges. 145 proven. 154 refuted. 0 times theorem prover too weak. 448 trivial. 0 not checked. [2018-11-10 05:43:57,000 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 05:43:57,001 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_eb64dea4-f845-4a99-94bf-540169bb37c3/bin-2019/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 05:43:57,015 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-10 05:43:57,062 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2018-11-10 05:43:57,062 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 05:43:57,066 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:43:57,111 INFO L134 CoverageAnalysis]: Checked inductivity of 747 backedges. 147 proven. 149 refuted. 0 times theorem prover too weak. 451 trivial. 0 not checked. [2018-11-10 05:43:57,127 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 05:43:57,127 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 12 [2018-11-10 05:43:57,128 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-10 05:43:57,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-10 05:43:57,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2018-11-10 05:43:57,128 INFO L87 Difference]: Start difference. First operand 45 states and 60 transitions. Second operand 12 states. [2018-11-10 05:43:57,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:43:57,194 INFO L93 Difference]: Finished difference Result 68 states and 116 transitions. [2018-11-10 05:43:57,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-10 05:43:57,195 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 123 [2018-11-10 05:43:57,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:43:57,196 INFO L225 Difference]: With dead ends: 68 [2018-11-10 05:43:57,196 INFO L226 Difference]: Without dead ends: 45 [2018-11-10 05:43:57,196 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 124 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2018-11-10 05:43:57,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-11-10 05:43:57,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-11-10 05:43:57,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-11-10 05:43:57,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2018-11-10 05:43:57,202 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 123 [2018-11-10 05:43:57,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:43:57,202 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2018-11-10 05:43:57,202 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-10 05:43:57,202 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2018-11-10 05:43:57,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-11-10 05:43:57,205 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:43:57,205 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 12, 7, 7, 7, 7, 7, 7, 7, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 05:43:57,205 INFO L424 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:43:57,205 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:43:57,205 INFO L82 PathProgramCache]: Analyzing trace with hash 580129251, now seen corresponding path program 7 times [2018-11-10 05:43:57,206 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 05:43:57,206 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 05:43:57,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:43:57,206 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 05:43:57,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:43:57,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 05:43:57,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 05:43:57,234 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-11-10 05:43:57,260 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.11 05:43:57 BoogieIcfgContainer [2018-11-10 05:43:57,260 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-10 05:43:57,260 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-10 05:43:57,260 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-10 05:43:57,260 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-10 05:43:57,261 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 05:43:54" (3/4) ... [2018-11-10 05:43:57,263 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-11-10 05:43:57,307 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_eb64dea4-f845-4a99-94bf-540169bb37c3/bin-2019/uautomizer/witness.graphml [2018-11-10 05:43:57,308 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-10 05:43:57,308 INFO L168 Benchmark]: Toolchain (without parser) took 2798.45 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 232.8 MB). Free memory was 962.4 MB in the beginning and 1.0 GB in the end (delta: -50.5 MB). Peak memory consumption was 182.3 MB. Max. memory is 11.5 GB. [2018-11-10 05:43:57,310 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 982.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 05:43:57,310 INFO L168 Benchmark]: CACSL2BoogieTranslator took 144.55 ms. Allocated memory is still 1.0 GB. Free memory was 962.4 MB in the beginning and 951.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-10 05:43:57,310 INFO L168 Benchmark]: Boogie Preprocessor took 15.60 ms. Allocated memory is still 1.0 GB. Free memory was 951.6 MB in the beginning and 950.5 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 11.5 GB. [2018-11-10 05:43:57,310 INFO L168 Benchmark]: RCFGBuilder took 160.74 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 173.0 MB). Free memory was 950.5 MB in the beginning and 1.2 GB in the end (delta: -205.6 MB). Peak memory consumption was 25.2 MB. Max. memory is 11.5 GB. [2018-11-10 05:43:57,311 INFO L168 Benchmark]: TraceAbstraction took 2427.14 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 59.8 MB). Free memory was 1.2 GB in the beginning and 1.0 GB in the end (delta: 143.3 MB). Peak memory consumption was 203.1 MB. Max. memory is 11.5 GB. [2018-11-10 05:43:57,311 INFO L168 Benchmark]: Witness Printer took 47.44 ms. Allocated memory is still 1.3 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 05:43:57,312 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 982.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 144.55 ms. Allocated memory is still 1.0 GB. Free memory was 962.4 MB in the beginning and 951.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 15.60 ms. Allocated memory is still 1.0 GB. Free memory was 951.6 MB in the beginning and 950.5 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 11.5 GB. * RCFGBuilder took 160.74 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 173.0 MB). Free memory was 950.5 MB in the beginning and 1.2 GB in the end (delta: -205.6 MB). Peak memory consumption was 25.2 MB. Max. memory is 11.5 GB. * TraceAbstraction took 2427.14 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 59.8 MB). Free memory was 1.2 GB in the beginning and 1.0 GB in the end (delta: 143.3 MB). Peak memory consumption was 203.1 MB. Max. memory is 11.5 GB. * Witness Printer took 47.44 ms. Allocated memory is still 1.3 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 33]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L28] int x = __VERIFIER_nondet_int(); [L29] CALL, EXPR fibonacci(x) VAL [\old(n)=5] [L17] COND FALSE !(n < 1) VAL [\old(n)=5, n=5] [L19] COND FALSE !(n == 1) VAL [\old(n)=5, n=5] [L22] CALL, EXPR fibonacci(n-1) VAL [\old(n)=4] [L17] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L19] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L22] CALL, EXPR fibonacci(n-1) VAL [\old(n)=3] [L17] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L19] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L22] CALL, EXPR fibonacci(n-1) VAL [\old(n)=2] [L17] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L19] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L22] CALL, EXPR fibonacci(n-1) VAL [\old(n)=1] [L17] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L19] COND TRUE n == 1 [L20] RET return 1; VAL [\old(n)=1, \result=1, n=1] [L22] EXPR fibonacci(n-1) VAL [\old(n)=2, fibonacci(n-1)=1, n=2] [L22] CALL, EXPR fibonacci(n-2) VAL [\old(n)=0] [L17] COND TRUE n < 1 [L18] RET return 0; VAL [\old(n)=0, \result=0, n=0] [L22] EXPR fibonacci(n-2) VAL [\old(n)=2, fibonacci(n-1)=1, fibonacci(n-2)=0, n=2] [L22] RET return fibonacci(n-1) + fibonacci(n-2); [L22] EXPR fibonacci(n-1) VAL [\old(n)=3, fibonacci(n-1)=1, n=3] [L22] CALL, EXPR fibonacci(n-2) VAL [\old(n)=1] [L17] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L19] COND TRUE n == 1 [L20] RET return 1; VAL [\old(n)=1, \result=1, n=1] [L22] EXPR fibonacci(n-2) VAL [\old(n)=3, fibonacci(n-1)=1, fibonacci(n-2)=1, n=3] [L22] RET return fibonacci(n-1) + fibonacci(n-2); [L22] EXPR fibonacci(n-1) VAL [\old(n)=4, fibonacci(n-1)=2, n=4] [L22] CALL, EXPR fibonacci(n-2) VAL [\old(n)=2] [L17] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L19] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L22] CALL, EXPR fibonacci(n-1) VAL [\old(n)=1] [L17] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L19] COND TRUE n == 1 [L20] RET return 1; VAL [\old(n)=1, \result=1, n=1] [L22] EXPR fibonacci(n-1) VAL [\old(n)=2, fibonacci(n-1)=1, n=2] [L22] CALL, EXPR fibonacci(n-2) VAL [\old(n)=0] [L17] COND TRUE n < 1 [L18] RET return 0; VAL [\old(n)=0, \result=0, n=0] [L22] EXPR fibonacci(n-2) VAL [\old(n)=2, fibonacci(n-1)=1, fibonacci(n-2)=0, n=2] [L22] RET return fibonacci(n-1) + fibonacci(n-2); [L22] EXPR fibonacci(n-2) VAL [\old(n)=4, fibonacci(n-1)=2, fibonacci(n-2)=1, n=4] [L22] RET return fibonacci(n-1) + fibonacci(n-2); [L22] EXPR fibonacci(n-1) VAL [\old(n)=5, fibonacci(n-1)=3, n=5] [L22] CALL, EXPR fibonacci(n-2) VAL [\old(n)=3] [L17] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L19] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L22] CALL, EXPR fibonacci(n-1) VAL [\old(n)=2] [L17] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L19] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L22] CALL, EXPR fibonacci(n-1) VAL [\old(n)=1] [L17] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L19] COND TRUE n == 1 [L20] RET return 1; VAL [\old(n)=1, \result=1, n=1] [L22] EXPR fibonacci(n-1) VAL [\old(n)=2, fibonacci(n-1)=1, n=2] [L22] CALL, EXPR fibonacci(n-2) VAL [\old(n)=0] [L17] COND TRUE n < 1 [L18] RET return 0; VAL [\old(n)=0, \result=0, n=0] [L22] EXPR fibonacci(n-2) VAL [\old(n)=2, fibonacci(n-1)=1, fibonacci(n-2)=0, n=2] [L22] RET return fibonacci(n-1) + fibonacci(n-2); [L22] EXPR fibonacci(n-1) VAL [\old(n)=3, fibonacci(n-1)=1, n=3] [L22] CALL, EXPR fibonacci(n-2) VAL [\old(n)=1] [L17] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L19] COND TRUE n == 1 [L20] RET return 1; VAL [\old(n)=1, \result=1, n=1] [L22] EXPR fibonacci(n-2) VAL [\old(n)=3, fibonacci(n-1)=1, fibonacci(n-2)=1, n=3] [L22] RET return fibonacci(n-1) + fibonacci(n-2); [L22] EXPR fibonacci(n-2) VAL [\old(n)=5, fibonacci(n-1)=3, fibonacci(n-2)=2, n=5] [L22] RET return fibonacci(n-1) + fibonacci(n-2); [L29] EXPR fibonacci(x) VAL [fibonacci(x)=5, x=5] [L29] int result = fibonacci(x); [L30] COND FALSE !(x != 5 || result == 3) VAL [result=5, x=5] [L33] __VERIFIER_error() VAL [result=5, x=5] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 23 locations, 1 error locations. UNSAFE Result, 2.3s OverallTime, 10 OverallIterations, 27 TraceHistogramMax, 0.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 163 SDtfs, 137 SDslu, 467 SDs, 0 SdLazy, 539 SolverSat, 160 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 671 GetRequests, 584 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=48occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 9 MinimizatonAttempts, 11 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 1280 NumberOfCodeBlocks, 1101 NumberOfCodeBlocksAsserted, 43 NumberOfCheckSat, 1155 ConstructedInterpolants, 0 QuantifiedInterpolants, 185573 SizeOfPredicates, 27 NumberOfNonLiveVariables, 897 ConjunctsInSsa, 55 ConjunctsInUnsatCore, 16 InterpolantComputations, 2 PerfectInterpolantSequences, 6024/6808 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...