./Ultimate.py --spec /storage/repos/svcomp/c/properties/unreach-call.prp --file /storage/repos/svcomp/c/loop-acceleration/underapprox_false-unreach-call1_true-termination.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2e94e6aa 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/loop-acceleration/underapprox_false-unreach-call1_true-termination.i -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 0d29117e01c2d68b456be2ae55b4c10d8b73c290 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 0.1.24-2e94e6a [2018-12-31 05:53:59,778 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-31 05:53:59,780 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-31 05:53:59,798 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-31 05:53:59,799 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-31 05:53:59,801 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-31 05:53:59,802 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-31 05:53:59,804 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-31 05:53:59,806 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-31 05:53:59,807 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-31 05:53:59,810 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-31 05:53:59,811 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-31 05:53:59,812 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-31 05:53:59,812 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-31 05:53:59,819 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-31 05:53:59,820 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-31 05:53:59,820 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-31 05:53:59,823 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-31 05:53:59,828 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-31 05:53:59,830 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-31 05:53:59,831 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-31 05:53:59,832 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-31 05:53:59,835 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-31 05:53:59,835 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-31 05:53:59,835 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-31 05:53:59,836 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-31 05:53:59,838 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-31 05:53:59,841 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-31 05:53:59,842 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-31 05:53:59,843 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-31 05:53:59,843 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-31 05:53:59,845 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-31 05:53:59,845 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-31 05:53:59,845 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-31 05:53:59,846 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-31 05:53:59,847 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-31 05:53:59,847 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-12-31 05:53:59,862 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-31 05:53:59,862 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-31 05:53:59,863 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-31 05:53:59,863 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-31 05:53:59,863 INFO L133 SettingsManager]: * Use SBE=true [2018-12-31 05:53:59,864 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-31 05:53:59,864 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-31 05:53:59,864 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-31 05:53:59,864 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-31 05:53:59,864 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-31 05:53:59,864 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-31 05:53:59,864 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-31 05:53:59,866 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-31 05:53:59,866 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-31 05:53:59,866 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-31 05:53:59,866 INFO L133 SettingsManager]: * Use constant arrays=true [2018-12-31 05:53:59,866 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-31 05:53:59,867 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-31 05:53:59,867 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-31 05:53:59,867 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-31 05:53:59,867 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-31 05:53:59,867 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-31 05:53:59,867 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-31 05:53:59,868 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-31 05:53:59,869 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-31 05:53:59,869 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-12-31 05:53:59,869 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-31 05:53:59,869 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-31 05:53:59,870 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 -> 0d29117e01c2d68b456be2ae55b4c10d8b73c290 [2018-12-31 05:53:59,907 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-31 05:53:59,920 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-31 05:53:59,923 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-31 05:53:59,925 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-31 05:53:59,925 INFO L276 PluginConnector]: CDTParser initialized [2018-12-31 05:53:59,926 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/svcomp/c/loop-acceleration/underapprox_false-unreach-call1_true-termination.i [2018-12-31 05:53:59,982 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/85ae0a9d4/d3801bffbb5b45b1b874d5930fc5b7dd/FLAGdf63a8367 [2018-12-31 05:54:00,429 INFO L307 CDTParser]: Found 1 translation units. [2018-12-31 05:54:00,430 INFO L161 CDTParser]: Scanning /storage/repos/svcomp/c/loop-acceleration/underapprox_false-unreach-call1_true-termination.i [2018-12-31 05:54:00,438 INFO L355 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/85ae0a9d4/d3801bffbb5b45b1b874d5930fc5b7dd/FLAGdf63a8367 [2018-12-31 05:54:00,783 INFO L363 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/85ae0a9d4/d3801bffbb5b45b1b874d5930fc5b7dd [2018-12-31 05:54:00,787 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-31 05:54:00,788 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-31 05:54:00,789 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-31 05:54:00,789 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-31 05:54:00,793 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-31 05:54:00,794 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.12 05:54:00" (1/1) ... [2018-12-31 05:54:00,797 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79fa1603 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 05:54:00, skipping insertion in model container [2018-12-31 05:54:00,797 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.12 05:54:00" (1/1) ... [2018-12-31 05:54:00,806 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-31 05:54:00,823 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-31 05:54:00,983 INFO L204 PostProcessor]: Analyzing one entry point: main [2018-12-31 05:54:00,988 INFO L191 MainTranslator]: Completed pre-run [2018-12-31 05:54:01,003 INFO L204 PostProcessor]: Analyzing one entry point: main [2018-12-31 05:54:01,016 INFO L195 MainTranslator]: Completed translation [2018-12-31 05:54:01,016 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 05:54:01 WrapperNode [2018-12-31 05:54:01,017 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-31 05:54:01,018 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-31 05:54:01,018 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-31 05:54:01,018 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-31 05:54:01,027 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 05:54:01" (1/1) ... [2018-12-31 05:54:01,033 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 05:54:01" (1/1) ... [2018-12-31 05:54:01,053 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-31 05:54:01,054 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-31 05:54:01,054 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-31 05:54:01,054 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-31 05:54:01,064 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 05:54:01" (1/1) ... [2018-12-31 05:54:01,064 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 05:54:01" (1/1) ... [2018-12-31 05:54:01,065 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 05:54:01" (1/1) ... [2018-12-31 05:54:01,065 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 05:54:01" (1/1) ... [2018-12-31 05:54:01,067 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 05:54:01" (1/1) ... [2018-12-31 05:54:01,072 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 05:54:01" (1/1) ... [2018-12-31 05:54:01,073 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 05:54:01" (1/1) ... [2018-12-31 05:54:01,074 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-31 05:54:01,074 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-31 05:54:01,074 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-31 05:54:01,075 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-31 05:54:01,075 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 05:54:01" (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 [2018-12-31 05:54:01,195 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-31 05:54:01,195 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-31 05:54:01,363 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-31 05:54:01,363 INFO L280 CfgBuilder]: Removed 7 assue(true) statements. [2018-12-31 05:54:01,363 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.12 05:54:01 BoogieIcfgContainer [2018-12-31 05:54:01,364 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-31 05:54:01,364 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-31 05:54:01,365 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-31 05:54:01,368 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-31 05:54:01,368 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.12 05:54:00" (1/3) ... [2018-12-31 05:54:01,369 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1376f858 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.12 05:54:01, skipping insertion in model container [2018-12-31 05:54:01,369 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 05:54:01" (2/3) ... [2018-12-31 05:54:01,369 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1376f858 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.12 05:54:01, skipping insertion in model container [2018-12-31 05:54:01,370 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.12 05:54:01" (3/3) ... [2018-12-31 05:54:01,371 INFO L112 eAbstractionObserver]: Analyzing ICFG underapprox_false-unreach-call1_true-termination.i [2018-12-31 05:54:01,382 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-31 05:54:01,389 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-31 05:54:01,406 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-31 05:54:01,440 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-12-31 05:54:01,440 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-31 05:54:01,440 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-31 05:54:01,440 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-31 05:54:01,441 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-31 05:54:01,441 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-31 05:54:01,441 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-31 05:54:01,441 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-31 05:54:01,441 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-31 05:54:01,453 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2018-12-31 05:54:01,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-31 05:54:01,459 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 05:54:01,460 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-31 05:54:01,462 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 05:54:01,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 05:54:01,468 INFO L82 PathProgramCache]: Analyzing trace with hash 29805000, now seen corresponding path program 1 times [2018-12-31 05:54:01,470 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 05:54:01,471 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 05:54:01,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 05:54:01,523 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 05:54:01,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 05:54:01,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 05:54:01,797 WARN L181 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 5 [2018-12-31 05:54:01,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 05:54:01,801 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-31 05:54:01,801 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-31 05:54:01,805 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-31 05:54:01,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-31 05:54:01,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-31 05:54:01,822 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 3 states. [2018-12-31 05:54:01,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 05:54:01,860 INFO L93 Difference]: Finished difference Result 17 states and 21 transitions. [2018-12-31 05:54:01,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-31 05:54:01,862 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2018-12-31 05:54:01,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 05:54:01,874 INFO L225 Difference]: With dead ends: 17 [2018-12-31 05:54:01,874 INFO L226 Difference]: Without dead ends: 7 [2018-12-31 05:54:01,877 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-31 05:54:01,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-12-31 05:54:01,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-12-31 05:54:01,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-12-31 05:54:01,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-12-31 05:54:01,907 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-12-31 05:54:01,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 05:54:01,908 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-12-31 05:54:01,908 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-31 05:54:01,909 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-12-31 05:54:01,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-31 05:54:01,909 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 05:54:01,909 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-12-31 05:54:01,910 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 05:54:01,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 05:54:01,910 INFO L82 PathProgramCache]: Analyzing trace with hash 925620370, now seen corresponding path program 1 times [2018-12-31 05:54:01,910 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 05:54:01,910 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 05:54:01,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 05:54:01,912 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 05:54:01,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 05:54:01,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 05:54:02,046 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 05:54:02,047 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 05:54:02,047 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 [2018-12-31 05:54:02,063 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 05:54:02,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 05:54:02,094 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 05:54:02,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 05:54:02,166 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 05:54:02,166 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2018-12-31 05:54:02,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-31 05:54:02,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-31 05:54:02,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-12-31 05:54:02,169 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 5 states. [2018-12-31 05:54:02,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 05:54:02,226 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-12-31 05:54:02,227 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-31 05:54:02,227 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2018-12-31 05:54:02,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 05:54:02,228 INFO L225 Difference]: With dead ends: 12 [2018-12-31 05:54:02,228 INFO L226 Difference]: Without dead ends: 8 [2018-12-31 05:54:02,229 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-12-31 05:54:02,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-12-31 05:54:02,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-12-31 05:54:02,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-12-31 05:54:02,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-12-31 05:54:02,232 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-12-31 05:54:02,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 05:54:02,232 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-12-31 05:54:02,232 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-31 05:54:02,232 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-12-31 05:54:02,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-12-31 05:54:02,233 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 05:54:02,233 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2018-12-31 05:54:02,233 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 05:54:02,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 05:54:02,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1368874232, now seen corresponding path program 2 times [2018-12-31 05:54:02,234 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 05:54:02,234 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 05:54:02,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 05:54:02,235 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 05:54:02,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 05:54:02,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 05:54:02,445 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 05:54:02,445 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 05:54:02,445 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 [2018-12-31 05:54:02,456 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-31 05:54:02,480 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-31 05:54:02,480 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 05:54:02,482 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 05:54:02,569 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 05:54:02,588 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 05:54:02,588 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-12-31 05:54:02,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-31 05:54:02,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-31 05:54:02,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-12-31 05:54:02,589 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 6 states. [2018-12-31 05:54:02,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 05:54:02,635 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-12-31 05:54:02,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-31 05:54:02,636 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 7 [2018-12-31 05:54:02,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 05:54:02,637 INFO L225 Difference]: With dead ends: 13 [2018-12-31 05:54:02,637 INFO L226 Difference]: Without dead ends: 9 [2018-12-31 05:54:02,638 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-12-31 05:54:02,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-12-31 05:54:02,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-12-31 05:54:02,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-12-31 05:54:02,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-12-31 05:54:02,641 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-12-31 05:54:02,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 05:54:02,641 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-12-31 05:54:02,641 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-31 05:54:02,642 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-12-31 05:54:02,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-12-31 05:54:02,642 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 05:54:02,642 INFO L402 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1] [2018-12-31 05:54:02,642 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 05:54:02,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 05:54:02,643 INFO L82 PathProgramCache]: Analyzing trace with hash 516237138, now seen corresponding path program 3 times [2018-12-31 05:54:02,643 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 05:54:02,643 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 05:54:02,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 05:54:02,644 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 05:54:02,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 05:54:02,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 05:54:02,930 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 05:54:02,930 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 05:54:02,931 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 [2018-12-31 05:54:02,940 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-31 05:54:02,952 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-12-31 05:54:02,952 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 05:54:02,953 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 05:54:02,981 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 05:54:03,000 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 05:54:03,000 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-12-31 05:54:03,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-31 05:54:03,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-31 05:54:03,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-12-31 05:54:03,002 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 7 states. [2018-12-31 05:54:03,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 05:54:03,176 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-12-31 05:54:03,177 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-31 05:54:03,177 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 8 [2018-12-31 05:54:03,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 05:54:03,177 INFO L225 Difference]: With dead ends: 14 [2018-12-31 05:54:03,178 INFO L226 Difference]: Without dead ends: 10 [2018-12-31 05:54:03,179 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-12-31 05:54:03,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-12-31 05:54:03,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-12-31 05:54:03,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-12-31 05:54:03,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-12-31 05:54:03,182 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-12-31 05:54:03,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 05:54:03,183 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-12-31 05:54:03,183 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-31 05:54:03,183 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-12-31 05:54:03,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-12-31 05:54:03,184 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 05:54:03,184 INFO L402 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1] [2018-12-31 05:54:03,184 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 05:54:03,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 05:54:03,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1174852536, now seen corresponding path program 4 times [2018-12-31 05:54:03,185 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 05:54:03,185 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 05:54:03,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 05:54:03,186 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 05:54:03,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 05:54:03,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 05:54:03,363 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 05:54:03,364 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 05:54:03,364 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 [2018-12-31 05:54:03,375 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-31 05:54:03,392 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-31 05:54:03,392 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 05:54:03,393 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 05:54:03,421 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 05:54:03,440 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 05:54:03,441 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2018-12-31 05:54:03,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-31 05:54:03,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-31 05:54:03,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2018-12-31 05:54:03,442 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 8 states. [2018-12-31 05:54:03,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 05:54:03,551 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-12-31 05:54:03,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-31 05:54:03,551 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 9 [2018-12-31 05:54:03,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 05:54:03,552 INFO L225 Difference]: With dead ends: 15 [2018-12-31 05:54:03,552 INFO L226 Difference]: Without dead ends: 11 [2018-12-31 05:54:03,553 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2018-12-31 05:54:03,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-12-31 05:54:03,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-12-31 05:54:03,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-12-31 05:54:03,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-12-31 05:54:03,556 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-12-31 05:54:03,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 05:54:03,557 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-12-31 05:54:03,557 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-31 05:54:03,557 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-12-31 05:54:03,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-12-31 05:54:03,557 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 05:54:03,558 INFO L402 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1] [2018-12-31 05:54:03,558 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 05:54:03,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 05:54:03,558 INFO L82 PathProgramCache]: Analyzing trace with hash -2059024878, now seen corresponding path program 5 times [2018-12-31 05:54:03,558 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 05:54:03,558 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 05:54:03,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 05:54:03,560 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 05:54:03,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 05:54:03,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 05:54:04,122 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 05:54:04,122 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 05:54:04,122 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 [2018-12-31 05:54:04,132 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-31 05:54:04,146 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-12-31 05:54:04,146 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 05:54:04,148 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 05:54:04,178 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 05:54:04,198 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 05:54:04,198 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-12-31 05:54:04,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-31 05:54:04,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-31 05:54:04,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2018-12-31 05:54:04,199 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 9 states. [2018-12-31 05:54:04,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 05:54:04,275 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-12-31 05:54:04,277 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-31 05:54:04,277 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 10 [2018-12-31 05:54:04,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 05:54:04,278 INFO L225 Difference]: With dead ends: 16 [2018-12-31 05:54:04,278 INFO L226 Difference]: Without dead ends: 12 [2018-12-31 05:54:04,278 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2018-12-31 05:54:04,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-12-31 05:54:04,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-12-31 05:54:04,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-12-31 05:54:04,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-12-31 05:54:04,282 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-12-31 05:54:04,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 05:54:04,282 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-12-31 05:54:04,282 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-31 05:54:04,283 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-12-31 05:54:04,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-12-31 05:54:04,283 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 05:54:04,283 INFO L402 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1] [2018-12-31 05:54:04,284 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 05:54:04,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 05:54:04,284 INFO L82 PathProgramCache]: Analyzing trace with hash 596403592, now seen corresponding path program 6 times [2018-12-31 05:54:04,284 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 05:54:04,284 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 05:54:04,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 05:54:04,285 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 05:54:04,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 05:54:04,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-31 05:54:04,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-31 05:54:04,335 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-12-31 05:54:04,357 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.12 05:54:04 BoogieIcfgContainer [2018-12-31 05:54:04,358 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-31 05:54:04,358 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-31 05:54:04,358 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-31 05:54:04,359 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-31 05:54:04,359 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.12 05:54:01" (3/4) ... [2018-12-31 05:54:04,363 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-12-31 05:54:04,418 INFO L145 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2018-12-31 05:54:04,418 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-31 05:54:04,419 INFO L168 Benchmark]: Toolchain (without parser) took 3631.99 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 111.7 MB). Free memory was 943.3 MB in the beginning and 948.6 MB in the end (delta: -5.3 MB). Peak memory consumption was 106.4 MB. Max. memory is 11.5 GB. [2018-12-31 05:54:04,421 INFO L168 Benchmark]: CDTParser took 0.15 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. [2018-12-31 05:54:04,421 INFO L168 Benchmark]: CACSL2BoogieTranslator took 227.73 ms. Allocated memory is still 1.0 GB. Free memory was 943.3 MB in the beginning and 932.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-31 05:54:04,422 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.82 ms. Allocated memory is still 1.0 GB. Free memory is still 932.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-31 05:54:04,424 INFO L168 Benchmark]: Boogie Preprocessor took 20.41 ms. Allocated memory is still 1.0 GB. Free memory is still 932.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-31 05:54:04,424 INFO L168 Benchmark]: RCFGBuilder took 289.34 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 111.7 MB). Free memory was 932.6 MB in the beginning and 1.1 GB in the end (delta: -156.1 MB). Peak memory consumption was 18.3 MB. Max. memory is 11.5 GB. [2018-12-31 05:54:04,426 INFO L168 Benchmark]: TraceAbstraction took 2993.45 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 955.4 MB in the end (delta: 133.2 MB). Peak memory consumption was 133.2 MB. Max. memory is 11.5 GB. [2018-12-31 05:54:04,426 INFO L168 Benchmark]: Witness Printer took 60.06 ms. Allocated memory is still 1.1 GB. Free memory was 955.4 MB in the beginning and 948.6 MB in the end (delta: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. [2018-12-31 05:54:04,432 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 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 227.73 ms. Allocated memory is still 1.0 GB. Free memory was 943.3 MB in the beginning and 932.6 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 35.82 ms. Allocated memory is still 1.0 GB. Free memory is still 932.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 20.41 ms. Allocated memory is still 1.0 GB. Free memory is still 932.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 289.34 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 111.7 MB). Free memory was 932.6 MB in the beginning and 1.1 GB in the end (delta: -156.1 MB). Peak memory consumption was 18.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 2993.45 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 955.4 MB in the end (delta: 133.2 MB). Peak memory consumption was 133.2 MB. Max. memory is 11.5 GB. * Witness Printer took 60.06 ms. Allocated memory is still 1.1 GB. Free memory was 955.4 MB in the beginning and 948.6 MB in the end (delta: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 4]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L9] unsigned int x = 0; [L10] unsigned int y = 1; [L11] COND TRUE x < 6 [L12] x++ [L13] y *= 2 [L11] COND TRUE x < 6 [L12] x++ [L13] y *= 2 [L11] COND TRUE x < 6 [L12] x++ [L13] y *= 2 [L11] COND TRUE x < 6 [L12] x++ [L13] y *= 2 [L11] COND TRUE x < 6 [L12] x++ [L13] y *= 2 [L11] COND TRUE x < 6 [L12] x++ [L13] y *= 2 [L11] COND FALSE !(x < 6) [L3] COND TRUE !(cond) [L4] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 9 locations, 1 error locations. UNSAFE Result, 2.9s OverallTime, 7 OverallIterations, 6 TraceHistogramMax, 0.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 33 SDtfs, 0 SDslu, 69 SDs, 0 SdLazy, 135 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 1.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=12occurred in iteration=6, 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, 6 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.7s InterpolantComputationTime, 96 NumberOfCodeBlocks, 96 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 74 ConstructedInterpolants, 0 QuantifiedInterpolants, 2490 SizeOfPredicates, 5 NumberOfNonLiveVariables, 145 ConjunctsInSsa, 45 ConjunctsInUnsatCore, 11 InterpolantComputations, 1 PerfectInterpolantSequences, 0/70 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...