./Ultimate.py --spec /storage/repos/svcomp/c/properties/unreach-call.prp --file /storage/repos/svcomp/c/recursive-simple/fibo_5_false-unreach-call_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 91b1670e Calling Ultimate with: java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/svcomp/c/recursive-simple/fibo_5_false-unreach-call_true-termination.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 9fa59d7f4411ba9a1b89a97ebb9693c6867ac636 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 0.1.24-91b1670 [2018-11-28 18:50:58,852 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-28 18:50:58,855 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-28 18:50:58,878 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-28 18:50:58,879 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-28 18:50:58,881 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-28 18:50:58,883 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-28 18:50:58,887 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-28 18:50:58,891 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-28 18:50:58,898 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-28 18:50:58,899 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-28 18:50:58,904 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-28 18:50:58,906 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-28 18:50:58,910 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-28 18:50:58,914 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-28 18:50:58,914 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-28 18:50:58,915 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-28 18:50:58,923 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-28 18:50:58,927 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-28 18:50:58,933 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-28 18:50:58,934 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-28 18:50:58,937 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-28 18:50:58,943 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-28 18:50:58,944 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-28 18:50:58,944 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-28 18:50:58,946 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-28 18:50:58,948 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-28 18:50:58,952 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-28 18:50:58,955 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-28 18:50:58,957 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-28 18:50:58,958 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-28 18:50:58,959 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-28 18:50:58,959 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-28 18:50:58,959 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-28 18:50:58,960 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-28 18:50:58,962 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-28 18:50:58,962 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-11-28 18:50:58,995 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-28 18:50:58,997 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-28 18:50:58,998 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-28 18:50:58,999 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-11-28 18:50:59,000 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-28 18:50:59,001 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-28 18:50:59,001 INFO L133 SettingsManager]: * Use SBE=true [2018-11-28 18:50:59,002 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-28 18:50:59,002 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-28 18:50:59,002 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-28 18:50:59,002 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-28 18:50:59,002 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-28 18:50:59,002 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-28 18:50:59,004 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-28 18:50:59,004 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-28 18:50:59,004 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-28 18:50:59,004 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-28 18:50:59,004 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-28 18:50:59,004 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-28 18:50:59,005 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-28 18:50:59,005 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-28 18:50:59,005 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-28 18:50:59,005 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-28 18:50:59,005 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-28 18:50:59,005 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-28 18:50:59,008 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-28 18:50:59,008 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-28 18:50:59,009 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-28 18:50:59,009 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-28 18:50:59,009 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-28 18:50:59,010 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 -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux 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 -> 9fa59d7f4411ba9a1b89a97ebb9693c6867ac636 [2018-11-28 18:50:59,052 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-28 18:50:59,065 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-28 18:50:59,070 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-28 18:50:59,071 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-28 18:50:59,072 INFO L276 PluginConnector]: CDTParser initialized [2018-11-28 18:50:59,072 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/svcomp/c/recursive-simple/fibo_5_false-unreach-call_true-termination.c [2018-11-28 18:50:59,142 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1be8d6623/57e1768bc02d4bdd8b166c0411a705bd/FLAG9cba003e1 [2018-11-28 18:50:59,588 INFO L307 CDTParser]: Found 1 translation units. [2018-11-28 18:50:59,589 INFO L161 CDTParser]: Scanning /storage/repos/svcomp/c/recursive-simple/fibo_5_false-unreach-call_true-termination.c [2018-11-28 18:50:59,596 INFO L355 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1be8d6623/57e1768bc02d4bdd8b166c0411a705bd/FLAG9cba003e1 [2018-11-28 18:50:59,948 INFO L363 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1be8d6623/57e1768bc02d4bdd8b166c0411a705bd [2018-11-28 18:50:59,951 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-28 18:50:59,953 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-28 18:50:59,954 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-28 18:50:59,954 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-28 18:50:59,958 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-28 18:50:59,959 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 06:50:59" (1/1) ... [2018-11-28 18:50:59,963 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25ebed1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:50:59, skipping insertion in model container [2018-11-28 18:50:59,964 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 06:50:59" (1/1) ... [2018-11-28 18:50:59,973 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-28 18:50:59,990 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-28 18:51:00,207 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 18:51:00,215 INFO L191 MainTranslator]: Completed pre-run [2018-11-28 18:51:00,239 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 18:51:00,259 INFO L195 MainTranslator]: Completed translation [2018-11-28 18:51:00,259 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:51:00 WrapperNode [2018-11-28 18:51:00,260 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-28 18:51:00,261 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-28 18:51:00,261 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-28 18:51:00,261 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-28 18:51:00,273 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:51:00" (1/1) ... [2018-11-28 18:51:00,280 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:51:00" (1/1) ... [2018-11-28 18:51:00,292 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-28 18:51:00,292 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-28 18:51:00,292 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-28 18:51:00,293 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-28 18:51:00,306 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:51:00" (1/1) ... [2018-11-28 18:51:00,306 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:51:00" (1/1) ... [2018-11-28 18:51:00,307 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:51:00" (1/1) ... [2018-11-28 18:51:00,308 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:51:00" (1/1) ... [2018-11-28 18:51:00,316 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:51:00" (1/1) ... [2018-11-28 18:51:00,322 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:51:00" (1/1) ... [2018-11-28 18:51:00,323 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:51:00" (1/1) ... [2018-11-28 18:51:00,325 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-28 18:51:00,326 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-28 18:51:00,326 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-28 18:51:00,326 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-28 18:51:00,327 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:51:00" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-28 18:51:00,507 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-28 18:51:00,508 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-28 18:51:00,509 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-28 18:51:00,509 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-28 18:51:00,509 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-28 18:51:00,509 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-28 18:51:00,510 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2018-11-28 18:51:00,511 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2018-11-28 18:51:00,758 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-28 18:51:00,759 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-11-28 18:51:00,760 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 06:51:00 BoogieIcfgContainer [2018-11-28 18:51:00,760 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-28 18:51:00,762 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-28 18:51:00,762 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-28 18:51:00,766 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-28 18:51:00,767 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 06:50:59" (1/3) ... [2018-11-28 18:51:00,768 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f8f75f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 06:51:00, skipping insertion in model container [2018-11-28 18:51:00,768 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:51:00" (2/3) ... [2018-11-28 18:51:00,770 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f8f75f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 06:51:00, skipping insertion in model container [2018-11-28 18:51:00,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 06:51:00" (3/3) ... [2018-11-28 18:51:00,774 INFO L112 eAbstractionObserver]: Analyzing ICFG fibo_5_false-unreach-call_true-termination.c [2018-11-28 18:51:00,799 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-28 18:51:00,817 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-28 18:51:00,851 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-28 18:51:00,900 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-28 18:51:00,901 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-28 18:51:00,904 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-28 18:51:00,904 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-28 18:51:00,904 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-28 18:51:00,904 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-28 18:51:00,905 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-28 18:51:00,905 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-28 18:51:00,905 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-28 18:51:00,940 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2018-11-28 18:51:00,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-28 18:51:00,947 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:51:00,948 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:51:00,951 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:51:00,958 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:51:00,958 INFO L82 PathProgramCache]: Analyzing trace with hash 537028541, now seen corresponding path program 1 times [2018-11-28 18:51:00,961 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:51:00,961 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:51:01,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:01,007 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:51:01,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:01,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:51:01,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 18:51:01,193 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 18:51:01,194 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-28 18:51:01,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-28 18:51:01,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-28 18:51:01,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-28 18:51:01,216 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2018-11-28 18:51:01,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:51:01,371 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2018-11-28 18:51:01,372 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-28 18:51:01,373 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-11-28 18:51:01,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:51:01,386 INFO L225 Difference]: With dead ends: 35 [2018-11-28 18:51:01,386 INFO L226 Difference]: Without dead ends: 21 [2018-11-28 18:51:01,390 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-28 18:51:01,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-11-28 18:51:01,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-11-28 18:51:01,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-11-28 18:51:01,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2018-11-28 18:51:01,441 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2018-11-28 18:51:01,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:51:01,442 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2018-11-28 18:51:01,442 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-28 18:51:01,442 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2018-11-28 18:51:01,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-11-28 18:51:01,444 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:51:01,445 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:51:01,445 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:51:01,445 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:51:01,445 INFO L82 PathProgramCache]: Analyzing trace with hash 179123823, now seen corresponding path program 1 times [2018-11-28 18:51:01,446 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:51:01,446 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:51:01,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:01,447 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:51:01,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:01,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:51:01,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 18:51:01,552 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 18:51:01,552 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-28 18:51:01,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-28 18:51:01,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-28 18:51:01,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-28 18:51:01,555 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 5 states. [2018-11-28 18:51:01,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:51:01,840 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2018-11-28 18:51:01,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-28 18:51:01,843 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-11-28 18:51:01,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:51:01,846 INFO L225 Difference]: With dead ends: 27 [2018-11-28 18:51:01,846 INFO L226 Difference]: Without dead ends: 23 [2018-11-28 18:51:01,848 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-28 18:51:01,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-11-28 18:51:01,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2018-11-28 18:51:01,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-11-28 18:51:01,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2018-11-28 18:51:01,866 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14 [2018-11-28 18:51:01,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:51:01,867 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2018-11-28 18:51:01,867 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-28 18:51:01,867 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2018-11-28 18:51:01,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-11-28 18:51:01,869 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:51:01,870 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:51:01,870 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:51:01,871 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:51:01,871 INFO L82 PathProgramCache]: Analyzing trace with hash 806022394, now seen corresponding path program 1 times [2018-11-28 18:51:01,871 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:51:01,871 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:51:01,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:01,874 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:51:01,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:01,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:51:02,083 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-28 18:51:02,083 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:51:02,084 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 18:51:02,098 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:51:02,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:51:02,137 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:51:02,231 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-28 18:51:02,258 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:51:02,259 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2018-11-28 18:51:02,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-28 18:51:02,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-28 18:51:02,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2018-11-28 18:51:02,261 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 8 states. [2018-11-28 18:51:02,469 WARN L180 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 7 DAG size of output: 6 [2018-11-28 18:51:02,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:51:02,612 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2018-11-28 18:51:02,619 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-28 18:51:02,619 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2018-11-28 18:51:02,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:51:02,621 INFO L225 Difference]: With dead ends: 38 [2018-11-28 18:51:02,621 INFO L226 Difference]: Without dead ends: 23 [2018-11-28 18:51:02,624 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2018-11-28 18:51:02,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-11-28 18:51:02,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-11-28 18:51:02,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-11-28 18:51:02,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2018-11-28 18:51:02,641 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 26 [2018-11-28 18:51:02,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:51:02,642 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2018-11-28 18:51:02,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-28 18:51:02,642 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2018-11-28 18:51:02,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-11-28 18:51:02,647 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:51:02,648 INFO L402 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] [2018-11-28 18:51:02,648 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:51:02,648 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:51:02,649 INFO L82 PathProgramCache]: Analyzing trace with hash -983862936, now seen corresponding path program 1 times [2018-11-28 18:51:02,649 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:51:02,649 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:51:02,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:02,653 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:51:02,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:02,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:51:02,815 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-28 18:51:02,816 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:51:02,816 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 18:51:02,837 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:51:02,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:51:02,861 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:51:02,877 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-28 18:51:02,899 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:51:02,899 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-11-28 18:51:02,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-28 18:51:02,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-28 18:51:02,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-11-28 18:51:02,901 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 6 states. [2018-11-28 18:51:03,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:51:03,174 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2018-11-28 18:51:03,175 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-28 18:51:03,176 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2018-11-28 18:51:03,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:51:03,179 INFO L225 Difference]: With dead ends: 32 [2018-11-28 18:51:03,179 INFO L226 Difference]: Without dead ends: 28 [2018-11-28 18:51:03,180 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-11-28 18:51:03,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-11-28 18:51:03,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-11-28 18:51:03,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-11-28 18:51:03,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2018-11-28 18:51:03,190 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 27 [2018-11-28 18:51:03,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:51:03,191 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2018-11-28 18:51:03,191 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-28 18:51:03,191 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2018-11-28 18:51:03,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-11-28 18:51:03,194 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:51:03,194 INFO L402 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] [2018-11-28 18:51:03,194 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:51:03,194 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:51:03,195 INFO L82 PathProgramCache]: Analyzing trace with hash 146085807, now seen corresponding path program 2 times [2018-11-28 18:51:03,195 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:51:03,196 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:51:03,196 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:03,197 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:51:03,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:03,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:51:03,446 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-11-28 18:51:03,447 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:51:03,447 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 18:51:03,468 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 18:51:03,502 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 18:51:03,502 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:51:03,507 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:51:03,578 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-11-28 18:51:03,609 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:51:03,609 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 8 [2018-11-28 18:51:03,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-28 18:51:03,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-28 18:51:03,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-11-28 18:51:03,611 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand 8 states. [2018-11-28 18:51:03,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:51:03,847 INFO L93 Difference]: Finished difference Result 40 states and 60 transitions. [2018-11-28 18:51:03,847 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-28 18:51:03,848 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2018-11-28 18:51:03,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:51:03,851 INFO L225 Difference]: With dead ends: 40 [2018-11-28 18:51:03,851 INFO L226 Difference]: Without dead ends: 36 [2018-11-28 18:51:03,852 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2018-11-28 18:51:03,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-11-28 18:51:03,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2018-11-28 18:51:03,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-11-28 18:51:03,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 49 transitions. [2018-11-28 18:51:03,863 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 49 transitions. Word has length 40 [2018-11-28 18:51:03,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:51:03,864 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 49 transitions. [2018-11-28 18:51:03,864 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-28 18:51:03,864 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 49 transitions. [2018-11-28 18:51:03,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-11-28 18:51:03,868 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:51:03,868 INFO L402 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] [2018-11-28 18:51:03,869 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:51:03,869 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:51:03,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1474757101, now seen corresponding path program 3 times [2018-11-28 18:51:03,869 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:51:03,869 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:51:03,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:03,871 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 18:51:03,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:03,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:51:04,166 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 176 proven. 28 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2018-11-28 18:51:04,167 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:51:04,167 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 18:51:04,181 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 18:51:04,255 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-11-28 18:51:04,255 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:51:04,263 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:51:04,330 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 174 proven. 17 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2018-11-28 18:51:04,350 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:51:04,350 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 12 [2018-11-28 18:51:04,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-28 18:51:04,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-28 18:51:04,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2018-11-28 18:51:04,352 INFO L87 Difference]: Start difference. First operand 33 states and 49 transitions. Second operand 12 states. [2018-11-28 18:51:04,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:51:04,962 INFO L93 Difference]: Finished difference Result 76 states and 143 transitions. [2018-11-28 18:51:04,963 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-28 18:51:04,963 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 96 [2018-11-28 18:51:04,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:51:04,968 INFO L225 Difference]: With dead ends: 76 [2018-11-28 18:51:04,968 INFO L226 Difference]: Without dead ends: 49 [2018-11-28 18:51:04,970 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2018-11-28 18:51:04,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-11-28 18:51:04,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2018-11-28 18:51:04,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-11-28 18:51:04,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 63 transitions. [2018-11-28 18:51:04,983 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 63 transitions. Word has length 96 [2018-11-28 18:51:04,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:51:04,984 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 63 transitions. [2018-11-28 18:51:04,984 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-28 18:51:04,984 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 63 transitions. [2018-11-28 18:51:04,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-11-28 18:51:04,987 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:51:04,987 INFO L402 BasicCegarLoop]: trace histogram [11, 11, 9, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:51:04,988 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:51:04,988 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:51:04,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1986920854, now seen corresponding path program 4 times [2018-11-28 18:51:04,988 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:51:04,989 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:51:04,990 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:04,990 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 18:51:04,990 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:05,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:51:05,396 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 23 proven. 69 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2018-11-28 18:51:05,396 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:51:05,397 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 18:51:05,407 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 18:51:05,442 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 18:51:05,442 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:51:05,448 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:51:05,637 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 22 proven. 127 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2018-11-28 18:51:05,659 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:51:05,659 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 19 [2018-11-28 18:51:05,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-11-28 18:51:05,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-11-28 18:51:05,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2018-11-28 18:51:05,661 INFO L87 Difference]: Start difference. First operand 43 states and 63 transitions. Second operand 19 states. [2018-11-28 18:51:07,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:51:07,058 INFO L93 Difference]: Finished difference Result 75 states and 150 transitions. [2018-11-28 18:51:07,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-11-28 18:51:07,061 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 82 [2018-11-28 18:51:07,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:51:07,064 INFO L225 Difference]: With dead ends: 75 [2018-11-28 18:51:07,065 INFO L226 Difference]: Without dead ends: 71 [2018-11-28 18:51:07,067 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=336, Invalid=1304, Unknown=0, NotChecked=0, Total=1640 [2018-11-28 18:51:07,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-11-28 18:51:07,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 48. [2018-11-28 18:51:07,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-11-28 18:51:07,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 77 transitions. [2018-11-28 18:51:07,089 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 77 transitions. Word has length 82 [2018-11-28 18:51:07,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:51:07,090 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 77 transitions. [2018-11-28 18:51:07,090 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-11-28 18:51:07,090 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 77 transitions. [2018-11-28 18:51:07,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2018-11-28 18:51:07,097 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:51:07,098 INFO L402 BasicCegarLoop]: trace histogram [31, 31, 27, 15, 15, 15, 15, 15, 15, 15, 12, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:51:07,098 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:51:07,098 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:51:07,098 INFO L82 PathProgramCache]: Analyzing trace with hash -977840436, now seen corresponding path program 5 times [2018-11-28 18:51:07,100 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:51:07,100 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:51:07,102 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:07,102 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 18:51:07,102 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:07,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:51:07,367 INFO L134 CoverageAnalysis]: Checked inductivity of 2631 backedges. 217 proven. 331 refuted. 0 times theorem prover too weak. 2083 trivial. 0 not checked. [2018-11-28 18:51:07,368 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:51:07,368 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 18:51:07,380 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-28 18:51:07,484 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2018-11-28 18:51:07,484 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:51:07,494 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:51:07,571 INFO L134 CoverageAnalysis]: Checked inductivity of 2631 backedges. 1174 proven. 4 refuted. 0 times theorem prover too weak. 1453 trivial. 0 not checked. [2018-11-28 18:51:07,609 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:51:07,609 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-11-28 18:51:07,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-28 18:51:07,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-28 18:51:07,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-11-28 18:51:07,613 INFO L87 Difference]: Start difference. First operand 48 states and 77 transitions. Second operand 7 states. [2018-11-28 18:51:08,051 WARN L180 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 9 DAG size of output: 7 [2018-11-28 18:51:08,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:51:08,185 INFO L93 Difference]: Finished difference Result 88 states and 156 transitions. [2018-11-28 18:51:08,186 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-28 18:51:08,186 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 220 [2018-11-28 18:51:08,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:51:08,189 INFO L225 Difference]: With dead ends: 88 [2018-11-28 18:51:08,189 INFO L226 Difference]: Without dead ends: 45 [2018-11-28 18:51:08,191 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2018-11-28 18:51:08,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-11-28 18:51:08,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-11-28 18:51:08,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-11-28 18:51:08,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 60 transitions. [2018-11-28 18:51:08,200 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 60 transitions. Word has length 220 [2018-11-28 18:51:08,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:51:08,200 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 60 transitions. [2018-11-28 18:51:08,200 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-28 18:51:08,200 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 60 transitions. [2018-11-28 18:51:08,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-11-28 18:51:08,203 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:51:08,203 INFO L402 BasicCegarLoop]: trace histogram [19, 19, 15, 9, 9, 9, 9, 9, 9, 9, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:51:08,203 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:51:08,204 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:51:08,204 INFO L82 PathProgramCache]: Analyzing trace with hash -1040445716, now seen corresponding path program 6 times [2018-11-28 18:51:08,204 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:51:08,204 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:51:08,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:08,205 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 18:51:08,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:08,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:51:08,516 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 241 proven. 102 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2018-11-28 18:51:08,517 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:51:08,518 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 18:51:08,529 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-28 18:51:08,630 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2018-11-28 18:51:08,630 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 18:51:08,638 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:51:08,710 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 259 proven. 59 refuted. 0 times theorem prover too weak. 615 trivial. 0 not checked. [2018-11-28 18:51:08,730 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 18:51:08,731 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 12 [2018-11-28 18:51:08,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-28 18:51:08,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-28 18:51:08,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2018-11-28 18:51:08,733 INFO L87 Difference]: Start difference. First operand 45 states and 60 transitions. Second operand 12 states. [2018-11-28 18:51:09,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:51:09,154 INFO L93 Difference]: Finished difference Result 67 states and 110 transitions. [2018-11-28 18:51:09,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-28 18:51:09,155 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 136 [2018-11-28 18:51:09,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:51:09,158 INFO L225 Difference]: With dead ends: 67 [2018-11-28 18:51:09,158 INFO L226 Difference]: Without dead ends: 50 [2018-11-28 18:51:09,160 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2018-11-28 18:51:09,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-11-28 18:51:09,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2018-11-28 18:51:09,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-11-28 18:51:09,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2018-11-28 18:51:09,168 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 136 [2018-11-28 18:51:09,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:51:09,169 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2018-11-28 18:51:09,169 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-28 18:51:09,170 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2018-11-28 18:51:09,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-11-28 18:51:09,172 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:51:09,172 INFO L402 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] [2018-11-28 18:51:09,172 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:51:09,173 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:51:09,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1200034344, now seen corresponding path program 7 times [2018-11-28 18:51:09,173 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:51:09,173 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:51:09,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:09,174 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 18:51:09,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:51:09,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 18:51:09,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 18:51:09,257 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-11-28 18:51:09,335 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 06:51:09 BoogieIcfgContainer [2018-11-28 18:51:09,335 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-28 18:51:09,336 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-28 18:51:09,336 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-28 18:51:09,336 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-28 18:51:09,337 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 06:51:00" (3/4) ... [2018-11-28 18:51:09,340 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-11-28 18:51:09,431 INFO L145 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2018-11-28 18:51:09,431 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-28 18:51:09,433 INFO L168 Benchmark]: Toolchain (without parser) took 9480.60 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 203.9 MB). Free memory was 951.4 MB in the beginning and 833.0 MB in the end (delta: 118.4 MB). Peak memory consumption was 322.4 MB. Max. memory is 11.5 GB. [2018-11-28 18:51:09,434 INFO L168 Benchmark]: CDTParser took 0.65 ms. Allocated memory is still 1.0 GB. Free memory is still 978.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 18:51:09,434 INFO L168 Benchmark]: CACSL2BoogieTranslator took 306.63 ms. Allocated memory is still 1.0 GB. Free memory was 951.4 MB in the beginning and 940.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-28 18:51:09,435 INFO L168 Benchmark]: Boogie Procedure Inliner took 30.94 ms. Allocated memory is still 1.0 GB. Free memory is still 940.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 18:51:09,435 INFO L168 Benchmark]: Boogie Preprocessor took 33.19 ms. Allocated memory is still 1.0 GB. Free memory is still 940.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 18:51:09,436 INFO L168 Benchmark]: RCFGBuilder took 433.95 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 133.7 MB). Free memory was 940.6 MB in the beginning and 1.1 GB in the end (delta: -170.6 MB). Peak memory consumption was 24.9 MB. Max. memory is 11.5 GB. [2018-11-28 18:51:09,436 INFO L168 Benchmark]: TraceAbstraction took 8572.94 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 70.3 MB). Free memory was 1.1 GB in the beginning and 840.8 MB in the end (delta: 270.4 MB). Peak memory consumption was 340.7 MB. Max. memory is 11.5 GB. [2018-11-28 18:51:09,437 INFO L168 Benchmark]: Witness Printer took 95.70 ms. Allocated memory is still 1.2 GB. Free memory was 840.8 MB in the beginning and 833.0 MB in the end (delta: 7.8 MB). Peak memory consumption was 7.8 MB. Max. memory is 11.5 GB. [2018-11-28 18:51:09,446 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.65 ms. Allocated memory is still 1.0 GB. Free memory is still 978.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 306.63 ms. Allocated memory is still 1.0 GB. Free memory was 951.4 MB in the beginning and 940.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 30.94 ms. Allocated memory is still 1.0 GB. Free memory is still 940.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 33.19 ms. Allocated memory is still 1.0 GB. Free memory is still 940.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 433.95 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 133.7 MB). Free memory was 940.6 MB in the beginning and 1.1 GB in the end (delta: -170.6 MB). Peak memory consumption was 24.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 8572.94 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 70.3 MB). Free memory was 1.1 GB in the beginning and 840.8 MB in the end (delta: 270.4 MB). Peak memory consumption was 340.7 MB. Max. memory is 11.5 GB. * Witness Printer took 95.70 ms. Allocated memory is still 1.2 GB. Free memory was 840.8 MB in the beginning and 833.0 MB in the end (delta: 7.8 MB). Peak memory consumption was 7.8 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 27]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L24] int x = 5; VAL [x=5] [L25] CALL, EXPR fibo(x) VAL [\old(n)=5] [L6] COND FALSE !(n < 1) VAL [\old(n)=5, n=5] [L8] COND FALSE !(n == 1) VAL [\old(n)=5, n=5] [L11] CALL, EXPR fibo(n-1) VAL [\old(n)=4] [L6] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L8] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L11] CALL, EXPR fibo(n-1) VAL [\old(n)=3] [L6] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L8] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L11] CALL, EXPR fibo(n-1) VAL [\old(n)=2] [L6] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L8] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L11] CALL, EXPR fibo(n-1) VAL [\old(n)=1] [L6] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L8] COND TRUE n == 1 [L9] return 1; VAL [\old(n)=1, \result=1, n=1] [L11] RET, EXPR fibo(n-1) VAL [\old(n)=2, fibo(n-1)=1, n=2] [L11] CALL, EXPR fibo(n-2) VAL [\old(n)=0] [L6] COND TRUE n < 1 [L7] return 0; VAL [\old(n)=0, \result=0, n=0] [L11] RET, EXPR fibo(n-2) VAL [\old(n)=2, fibo(n-1)=1, fibo(n-2)=0, n=2] [L11] return fibo(n-1) + fibo(n-2); [L11] RET, EXPR fibo(n-1) VAL [\old(n)=3, fibo(n-1)=1, n=3] [L11] CALL, EXPR fibo(n-2) VAL [\old(n)=1] [L6] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L8] COND TRUE n == 1 [L9] return 1; VAL [\old(n)=1, \result=1, n=1] [L11] RET, EXPR fibo(n-2) VAL [\old(n)=3, fibo(n-1)=1, fibo(n-2)=1, n=3] [L11] return fibo(n-1) + fibo(n-2); [L11] RET, EXPR fibo(n-1) VAL [\old(n)=4, fibo(n-1)=2, n=4] [L11] CALL, EXPR fibo(n-2) VAL [\old(n)=2] [L6] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L8] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L11] CALL, EXPR fibo(n-1) VAL [\old(n)=1] [L6] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L8] COND TRUE n == 1 [L9] return 1; VAL [\old(n)=1, \result=1, n=1] [L11] RET, EXPR fibo(n-1) VAL [\old(n)=2, fibo(n-1)=1, n=2] [L11] CALL, EXPR fibo(n-2) VAL [\old(n)=0] [L6] COND TRUE n < 1 [L7] return 0; VAL [\old(n)=0, \result=0, n=0] [L11] RET, EXPR fibo(n-2) VAL [\old(n)=2, fibo(n-1)=1, fibo(n-2)=0, n=2] [L11] return fibo(n-1) + fibo(n-2); [L11] RET, EXPR fibo(n-2) VAL [\old(n)=4, fibo(n-1)=2, fibo(n-2)=1, n=4] [L11] return fibo(n-1) + fibo(n-2); [L11] RET, EXPR fibo(n-1) VAL [\old(n)=5, fibo(n-1)=3, n=5] [L11] CALL, EXPR fibo(n-2) VAL [\old(n)=3] [L6] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L8] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L11] CALL, EXPR fibo(n-1) VAL [\old(n)=2] [L6] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L8] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L11] CALL, EXPR fibo(n-1) VAL [\old(n)=1] [L6] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L8] COND TRUE n == 1 [L9] return 1; VAL [\old(n)=1, \result=1, n=1] [L11] RET, EXPR fibo(n-1) VAL [\old(n)=2, fibo(n-1)=1, n=2] [L11] CALL, EXPR fibo(n-2) VAL [\old(n)=0] [L6] COND TRUE n < 1 [L7] return 0; VAL [\old(n)=0, \result=0, n=0] [L11] RET, EXPR fibo(n-2) VAL [\old(n)=2, fibo(n-1)=1, fibo(n-2)=0, n=2] [L11] return fibo(n-1) + fibo(n-2); [L11] RET, EXPR fibo(n-1) VAL [\old(n)=3, fibo(n-1)=1, n=3] [L11] CALL, EXPR fibo(n-2) VAL [\old(n)=1] [L6] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L8] COND TRUE n == 1 [L9] return 1; VAL [\old(n)=1, \result=1, n=1] [L11] RET, EXPR fibo(n-2) VAL [\old(n)=3, fibo(n-1)=1, fibo(n-2)=1, n=3] [L11] return fibo(n-1) + fibo(n-2); [L11] RET, EXPR fibo(n-2) VAL [\old(n)=5, fibo(n-1)=3, fibo(n-2)=2, n=5] [L11] return fibo(n-1) + fibo(n-2); [L25] RET, EXPR fibo(x) VAL [fibo(x)=5, x=5] [L25] int result = fibo(x); [L26] COND TRUE result == 5 VAL [result=5, x=5] [L27] __VERIFIER_error() VAL [result=5, x=5] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 24 locations, 1 error locations. UNSAFE Result, 8.4s OverallTime, 10 OverallIterations, 31 TraceHistogramMax, 4.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 165 SDtfs, 181 SDslu, 503 SDs, 0 SdLazy, 824 SolverSat, 234 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 761 GetRequests, 646 SyntacticMatches, 1 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 3.3s 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: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 36 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 2.5s InterpolantComputationTime, 1390 NumberOfCodeBlocks, 1171 NumberOfCodeBlocksAsserted, 39 NumberOfCheckSat, 1265 ConstructedInterpolants, 0 QuantifiedInterpolants, 224949 SizeOfPredicates, 27 NumberOfNonLiveVariables, 913 ConjunctsInSsa, 54 ConjunctsInUnsatCore, 16 InterpolantComputations, 2 PerfectInterpolantSequences, 7931/8718 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...