./Ultimate.py --spec /storage/repos/svcomp/c/properties/unreach-call.prp --file /storage/repos/svcomp/c/loop-lit/ddlm2013_true-unreach-call.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0ed9222f 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-lit/ddlm2013_true-unreach-call.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 17744505b3a424a40a1b2449004fea58677c1b94 .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-0ed9222-m [2019-01-12 11:24:30,824 INFO L170 SettingsManager]: Resetting all preferences to default values... [2019-01-12 11:24:30,827 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2019-01-12 11:24:30,843 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-01-12 11:24:30,845 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-01-12 11:24:30,846 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-01-12 11:24:30,848 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-01-12 11:24:30,850 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2019-01-12 11:24:30,853 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-01-12 11:24:30,855 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-01-12 11:24:30,858 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-01-12 11:24:30,859 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-01-12 11:24:30,860 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-01-12 11:24:30,861 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-01-12 11:24:30,864 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-01-12 11:24:30,865 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-01-12 11:24:30,870 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-01-12 11:24:30,874 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-01-12 11:24:30,877 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2019-01-12 11:24:30,881 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-01-12 11:24:30,882 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-01-12 11:24:30,885 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-01-12 11:24:30,889 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-01-12 11:24:30,891 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-01-12 11:24:30,892 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-01-12 11:24:30,892 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-01-12 11:24:30,894 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-01-12 11:24:30,895 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-01-12 11:24:30,896 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2019-01-12 11:24:30,897 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-01-12 11:24:30,898 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2019-01-12 11:24:30,899 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-01-12 11:24:30,899 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-01-12 11:24:30,899 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2019-01-12 11:24:30,902 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2019-01-12 11:24:30,902 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2019-01-12 11:24:30,903 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-01-12 11:24:30,920 INFO L110 SettingsManager]: Loading preferences was successful [2019-01-12 11:24:30,920 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2019-01-12 11:24:30,921 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-01-12 11:24:30,921 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2019-01-12 11:24:30,921 INFO L133 SettingsManager]: * Use SBE=true [2019-01-12 11:24:30,922 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-01-12 11:24:30,922 INFO L133 SettingsManager]: * sizeof long=4 [2019-01-12 11:24:30,923 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2019-01-12 11:24:30,923 INFO L133 SettingsManager]: * sizeof POINTER=4 [2019-01-12 11:24:30,923 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2019-01-12 11:24:30,923 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-01-12 11:24:30,923 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-01-12 11:24:30,923 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-01-12 11:24:30,924 INFO L133 SettingsManager]: * sizeof long double=12 [2019-01-12 11:24:30,925 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2019-01-12 11:24:30,925 INFO L133 SettingsManager]: * Use constant arrays=true [2019-01-12 11:24:30,925 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-01-12 11:24:30,925 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-01-12 11:24:30,925 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-01-12 11:24:30,925 INFO L133 SettingsManager]: * To the following directory=./dump/ [2019-01-12 11:24:30,926 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2019-01-12 11:24:30,926 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-01-12 11:24:30,927 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-01-12 11:24:30,927 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-01-12 11:24:30,927 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-01-12 11:24:30,927 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2019-01-12 11:24:30,927 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-01-12 11:24:30,928 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-01-12 11:24:30,928 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 -> 17744505b3a424a40a1b2449004fea58677c1b94 [2019-01-12 11:24:30,964 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-01-12 11:24:30,985 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-01-12 11:24:30,992 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-01-12 11:24:30,993 INFO L271 PluginConnector]: Initializing CDTParser... [2019-01-12 11:24:30,994 INFO L276 PluginConnector]: CDTParser initialized [2019-01-12 11:24:30,994 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/svcomp/c/loop-lit/ddlm2013_true-unreach-call.i [2019-01-12 11:24:31,054 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fbb2a259b/13df7ae56f67471d87150e5f011ce9f2/FLAG10007a31b [2019-01-12 11:24:31,489 INFO L307 CDTParser]: Found 1 translation units. [2019-01-12 11:24:31,490 INFO L161 CDTParser]: Scanning /storage/repos/svcomp/c/loop-lit/ddlm2013_true-unreach-call.i [2019-01-12 11:24:31,497 INFO L355 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fbb2a259b/13df7ae56f67471d87150e5f011ce9f2/FLAG10007a31b [2019-01-12 11:24:31,841 INFO L363 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fbb2a259b/13df7ae56f67471d87150e5f011ce9f2 [2019-01-12 11:24:31,845 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-01-12 11:24:31,847 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-01-12 11:24:31,848 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-01-12 11:24:31,848 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-01-12 11:24:31,852 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2019-01-12 11:24:31,853 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.01 11:24:31" (1/1) ... [2019-01-12 11:24:31,856 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10e2c51a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.01 11:24:31, skipping insertion in model container [2019-01-12 11:24:31,856 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.01 11:24:31" (1/1) ... [2019-01-12 11:24:31,864 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-01-12 11:24:31,882 INFO L176 MainTranslator]: Built tables and reachable declarations [2019-01-12 11:24:32,081 INFO L208 PostProcessor]: Analyzing one entry point: main [2019-01-12 11:24:32,085 INFO L191 MainTranslator]: Completed pre-run [2019-01-12 11:24:32,104 INFO L208 PostProcessor]: Analyzing one entry point: main [2019-01-12 11:24:32,119 INFO L195 MainTranslator]: Completed translation [2019-01-12 11:24:32,119 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.01 11:24:32 WrapperNode [2019-01-12 11:24:32,120 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-01-12 11:24:32,120 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-01-12 11:24:32,121 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-01-12 11:24:32,121 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2019-01-12 11:24:32,130 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.01 11:24:32" (1/1) ... [2019-01-12 11:24:32,136 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.01 11:24:32" (1/1) ... [2019-01-12 11:24:32,158 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-01-12 11:24:32,158 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-01-12 11:24:32,158 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-01-12 11:24:32,158 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2019-01-12 11:24:32,169 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.01 11:24:32" (1/1) ... [2019-01-12 11:24:32,169 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.01 11:24:32" (1/1) ... [2019-01-12 11:24:32,170 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.01 11:24:32" (1/1) ... [2019-01-12 11:24:32,171 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.01 11:24:32" (1/1) ... [2019-01-12 11:24:32,174 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.01 11:24:32" (1/1) ... [2019-01-12 11:24:32,180 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.01 11:24:32" (1/1) ... [2019-01-12 11:24:32,181 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.01 11:24:32" (1/1) ... [2019-01-12 11:24:32,183 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-01-12 11:24:32,183 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-01-12 11:24:32,183 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-01-12 11:24:32,183 INFO L276 PluginConnector]: RCFGBuilder initialized [2019-01-12 11:24:32,184 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.01 11:24:32" (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 [2019-01-12 11:24:32,312 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-01-12 11:24:32,312 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-01-12 11:24:32,553 INFO L281 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-01-12 11:24:32,554 INFO L286 CfgBuilder]: Removed 7 assue(true) statements. [2019-01-12 11:24:32,555 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.01 11:24:32 BoogieIcfgContainer [2019-01-12 11:24:32,555 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-01-12 11:24:32,556 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-01-12 11:24:32,556 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-01-12 11:24:32,559 INFO L276 PluginConnector]: TraceAbstraction initialized [2019-01-12 11:24:32,560 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.01 11:24:31" (1/3) ... [2019-01-12 11:24:32,560 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9c8c78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.01 11:24:32, skipping insertion in model container [2019-01-12 11:24:32,561 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.01 11:24:32" (2/3) ... [2019-01-12 11:24:32,561 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9c8c78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.01 11:24:32, skipping insertion in model container [2019-01-12 11:24:32,561 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.01 11:24:32" (3/3) ... [2019-01-12 11:24:32,563 INFO L112 eAbstractionObserver]: Analyzing ICFG ddlm2013_true-unreach-call.i [2019-01-12 11:24:32,573 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-01-12 11:24:32,587 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-01-12 11:24:32,605 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-01-12 11:24:32,641 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2019-01-12 11:24:32,642 INFO L382 AbstractCegarLoop]: Interprodecural is true [2019-01-12 11:24:32,642 INFO L383 AbstractCegarLoop]: Hoare is true [2019-01-12 11:24:32,642 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-01-12 11:24:32,642 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-01-12 11:24:32,642 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-01-12 11:24:32,642 INFO L387 AbstractCegarLoop]: Difference is false [2019-01-12 11:24:32,643 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-01-12 11:24:32,643 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-01-12 11:24:32,659 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2019-01-12 11:24:32,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-12 11:24:32,665 INFO L394 BasicCegarLoop]: Found error trace [2019-01-12 11:24:32,666 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-12 11:24:32,669 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-01-12 11:24:32,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-12 11:24:32,675 INFO L82 PathProgramCache]: Analyzing trace with hash 920569802, now seen corresponding path program 1 times [2019-01-12 11:24:32,677 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-01-12 11:24:32,677 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-01-12 11:24:32,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-12 11:24:32,723 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-12 11:24:32,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-12 11:24:32,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-12 11:24:32,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-12 11:24:32,777 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-12 11:24:32,777 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-01-12 11:24:32,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-01-12 11:24:32,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-01-12 11:24:32,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-01-12 11:24:32,796 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 2 states. [2019-01-12 11:24:32,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-12 11:24:32,808 INFO L93 Difference]: Finished difference Result 21 states and 27 transitions. [2019-01-12 11:24:32,809 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-01-12 11:24:32,810 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2019-01-12 11:24:32,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-12 11:24:32,821 INFO L225 Difference]: With dead ends: 21 [2019-01-12 11:24:32,822 INFO L226 Difference]: Without dead ends: 9 [2019-01-12 11:24:32,825 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-01-12 11:24:32,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2019-01-12 11:24:32,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2019-01-12 11:24:32,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-01-12 11:24:32,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 11 transitions. [2019-01-12 11:24:32,854 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 11 transitions. Word has length 6 [2019-01-12 11:24:32,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-12 11:24:32,854 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 11 transitions. [2019-01-12 11:24:32,854 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-01-12 11:24:32,855 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 11 transitions. [2019-01-12 11:24:32,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-01-12 11:24:32,855 INFO L394 BasicCegarLoop]: Found error trace [2019-01-12 11:24:32,855 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-01-12 11:24:32,856 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-01-12 11:24:32,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-12 11:24:32,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1539532969, now seen corresponding path program 1 times [2019-01-12 11:24:32,856 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-01-12 11:24:32,856 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-01-12 11:24:32,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-12 11:24:32,857 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-12 11:24:32,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-12 11:24:32,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-12 11:24:33,192 WARN L181 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 5 [2019-01-12 11:24:33,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-12 11:24:33,213 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-12 11:24:33,213 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-01-12 11:24:33,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-01-12 11:24:33,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-01-12 11:24:33,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-01-12 11:24:33,216 INFO L87 Difference]: Start difference. First operand 9 states and 11 transitions. Second operand 4 states. [2019-01-12 11:24:33,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-12 11:24:33,275 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2019-01-12 11:24:33,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-01-12 11:24:33,276 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-01-12 11:24:33,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-12 11:24:33,277 INFO L225 Difference]: With dead ends: 15 [2019-01-12 11:24:33,277 INFO L226 Difference]: Without dead ends: 11 [2019-01-12 11:24:33,278 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-01-12 11:24:33,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2019-01-12 11:24:33,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2019-01-12 11:24:33,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-01-12 11:24:33,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2019-01-12 11:24:33,285 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 7 [2019-01-12 11:24:33,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-12 11:24:33,285 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2019-01-12 11:24:33,285 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-01-12 11:24:33,286 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2019-01-12 11:24:33,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-01-12 11:24:33,288 INFO L394 BasicCegarLoop]: Found error trace [2019-01-12 11:24:33,288 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-01-12 11:24:33,288 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-01-12 11:24:33,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-12 11:24:33,291 INFO L82 PathProgramCache]: Analyzing trace with hash -1067556335, now seen corresponding path program 1 times [2019-01-12 11:24:33,291 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-01-12 11:24:33,291 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-01-12 11:24:33,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-12 11:24:33,293 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-12 11:24:33,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-12 11:24:33,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-12 11:24:33,769 WARN L181 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 5 [2019-01-12 11:24:33,780 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-12 11:24:33,780 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-12 11:24:33,780 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 [2019-01-12 11:24:33,791 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-12 11:24:33,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-12 11:24:33,831 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-12 11:24:33,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-12 11:24:34,015 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-01-12 11:24:34,015 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2019-01-12 11:24:34,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-12 11:24:34,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-12 11:24:34,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-01-12 11:24:34,017 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand 10 states. [2019-01-12 11:24:34,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-12 11:24:34,217 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2019-01-12 11:24:34,219 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-12 11:24:34,220 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2019-01-12 11:24:34,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-12 11:24:34,220 INFO L225 Difference]: With dead ends: 20 [2019-01-12 11:24:34,221 INFO L226 Difference]: Without dead ends: 16 [2019-01-12 11:24:34,221 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2019-01-12 11:24:34,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-01-12 11:24:34,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 14. [2019-01-12 11:24:34,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-01-12 11:24:34,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2019-01-12 11:24:34,224 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 10 [2019-01-12 11:24:34,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-12 11:24:34,225 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2019-01-12 11:24:34,225 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-12 11:24:34,225 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2019-01-12 11:24:34,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-01-12 11:24:34,226 INFO L394 BasicCegarLoop]: Found error trace [2019-01-12 11:24:34,226 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-01-12 11:24:34,226 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-01-12 11:24:34,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-12 11:24:34,227 INFO L82 PathProgramCache]: Analyzing trace with hash -387497965, now seen corresponding path program 1 times [2019-01-12 11:24:34,227 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-01-12 11:24:34,227 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-01-12 11:24:34,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-12 11:24:34,228 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-12 11:24:34,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-12 11:24:34,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-12 11:24:34,262 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-01-12 11:24:34,263 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-12 11:24:34,263 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-01-12 11:24:34,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-01-12 11:24:34,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-01-12 11:24:34,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-12 11:24:34,264 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand 3 states. [2019-01-12 11:24:34,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-12 11:24:34,279 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2019-01-12 11:24:34,279 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-12 11:24:34,279 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-01-12 11:24:34,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-12 11:24:34,280 INFO L225 Difference]: With dead ends: 23 [2019-01-12 11:24:34,280 INFO L226 Difference]: Without dead ends: 14 [2019-01-12 11:24:34,281 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-12 11:24:34,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-01-12 11:24:34,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-01-12 11:24:34,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-01-12 11:24:34,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2019-01-12 11:24:34,284 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 10 [2019-01-12 11:24:34,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-12 11:24:34,284 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2019-01-12 11:24:34,284 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-01-12 11:24:34,284 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2019-01-12 11:24:34,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-01-12 11:24:34,285 INFO L394 BasicCegarLoop]: Found error trace [2019-01-12 11:24:34,285 INFO L402 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2019-01-12 11:24:34,286 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-01-12 11:24:34,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-12 11:24:34,286 INFO L82 PathProgramCache]: Analyzing trace with hash -2134579945, now seen corresponding path program 2 times [2019-01-12 11:24:34,286 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-01-12 11:24:34,286 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-01-12 11:24:34,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-12 11:24:34,287 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-12 11:24:34,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-12 11:24:34,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-12 11:24:34,665 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-12 11:24:34,666 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-12 11:24:34,666 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 [2019-01-12 11:24:34,680 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-01-12 11:24:34,731 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-01-12 11:24:34,731 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-12 11:24:34,735 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-12 11:24:35,217 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-12 11:24:35,235 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-01-12 11:24:35,236 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2019-01-12 11:24:35,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-01-12 11:24:35,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-01-12 11:24:35,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2019-01-12 11:24:35,237 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 14 states. [2019-01-12 11:24:35,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-12 11:24:35,546 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions. [2019-01-12 11:24:35,548 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-01-12 11:24:35,548 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 13 [2019-01-12 11:24:35,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-12 11:24:35,549 INFO L225 Difference]: With dead ends: 41 [2019-01-12 11:24:35,549 INFO L226 Difference]: Without dead ends: 24 [2019-01-12 11:24:35,550 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2019-01-12 11:24:35,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-01-12 11:24:35,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 17. [2019-01-12 11:24:35,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-01-12 11:24:35,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2019-01-12 11:24:35,553 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 13 [2019-01-12 11:24:35,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-12 11:24:35,554 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2019-01-12 11:24:35,554 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-01-12 11:24:35,554 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2019-01-12 11:24:35,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-01-12 11:24:35,555 INFO L394 BasicCegarLoop]: Found error trace [2019-01-12 11:24:35,555 INFO L402 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-01-12 11:24:35,555 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-01-12 11:24:35,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-12 11:24:35,556 INFO L82 PathProgramCache]: Analyzing trace with hash -2101929389, now seen corresponding path program 1 times [2019-01-12 11:24:35,556 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-01-12 11:24:35,556 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-01-12 11:24:35,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-12 11:24:35,557 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-12 11:24:35,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-12 11:24:35,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-12 11:24:37,811 WARN L181 SmtUtils]: Spent 2.09 s on a formula simplification. DAG size of input: 43 DAG size of output: 15 [2019-01-12 11:24:37,821 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-01-12 11:24:37,822 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-12 11:24:37,822 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 [2019-01-12 11:24:37,841 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-12 11:24:37,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-12 11:24:37,857 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-12 11:24:37,914 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-01-12 11:24:37,932 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-01-12 11:24:37,932 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-01-12 11:24:37,933 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-12 11:24:37,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-12 11:24:37,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-01-12 11:24:37,933 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 6 states. [2019-01-12 11:24:37,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-12 11:24:37,999 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2019-01-12 11:24:38,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-12 11:24:38,001 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2019-01-12 11:24:38,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-12 11:24:38,002 INFO L225 Difference]: With dead ends: 22 [2019-01-12 11:24:38,002 INFO L226 Difference]: Without dead ends: 0 [2019-01-12 11:24:38,003 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-01-12 11:24:38,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-01-12 11:24:38,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-01-12 11:24:38,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-01-12 11:24:38,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-01-12 11:24:38,004 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 16 [2019-01-12 11:24:38,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-12 11:24:38,004 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-01-12 11:24:38,004 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-12 11:24:38,004 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-01-12 11:24:38,004 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-01-12 11:24:38,009 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-01-12 11:24:38,018 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-01-12 11:24:38,018 INFO L451 ceAbstractionStarter]: At program point L31(lines 31 33) the Hoare annotation is: true [2019-01-12 11:24:38,019 INFO L448 ceAbstractionStarter]: For program point L25(lines 25 29) no Hoare annotation was computed. [2019-01-12 11:24:38,019 INFO L448 ceAbstractionStarter]: For program point L25-2(lines 10 35) no Hoare annotation was computed. [2019-01-12 11:24:38,019 INFO L448 ceAbstractionStarter]: For program point L21(lines 21 30) no Hoare annotation was computed. [2019-01-12 11:24:38,019 INFO L448 ceAbstractionStarter]: For program point L21-2(lines 10 35) no Hoare annotation was computed. [2019-01-12 11:24:38,019 INFO L448 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2019-01-12 11:24:38,019 INFO L451 ceAbstractionStarter]: At program point L34(lines 10 35) the Hoare annotation is: true [2019-01-12 11:24:38,019 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-01-12 11:24:38,020 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-01-12 11:24:38,020 INFO L448 ceAbstractionStarter]: For program point L16(lines 16 20) no Hoare annotation was computed. [2019-01-12 11:24:38,020 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2019-01-12 11:24:38,020 INFO L448 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2019-01-12 11:24:38,027 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.01 11:24:38 BoogieIcfgContainer [2019-01-12 11:24:38,027 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-01-12 11:24:38,028 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-01-12 11:24:38,028 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-01-12 11:24:38,028 INFO L276 PluginConnector]: Witness Printer initialized [2019-01-12 11:24:38,029 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.01 11:24:32" (3/4) ... [2019-01-12 11:24:38,033 INFO L144 WitnessPrinter]: Generating witness for correct program [2019-01-12 11:24:38,043 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2019-01-12 11:24:38,044 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-01-12 11:24:38,095 INFO L145 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-01-12 11:24:38,099 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-01-12 11:24:38,100 INFO L168 Benchmark]: Toolchain (without parser) took 6253.67 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 138.4 MB). Free memory was 948.7 MB in the beginning and 936.3 MB in the end (delta: 12.4 MB). Peak memory consumption was 150.8 MB. Max. memory is 11.5 GB. [2019-01-12 11:24:38,100 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. [2019-01-12 11:24:38,101 INFO L168 Benchmark]: CACSL2BoogieTranslator took 272.12 ms. Allocated memory is still 1.0 GB. Free memory was 948.7 MB in the beginning and 937.9 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-01-12 11:24:38,101 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.35 ms. Allocated memory is still 1.0 GB. Free memory is still 937.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-01-12 11:24:38,102 INFO L168 Benchmark]: Boogie Preprocessor took 24.74 ms. Allocated memory is still 1.0 GB. Free memory was 937.9 MB in the beginning and 932.6 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-01-12 11:24:38,102 INFO L168 Benchmark]: RCFGBuilder took 372.22 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 138.4 MB). Free memory was 932.6 MB in the beginning and 1.1 GB in the end (delta: -181.4 MB). Peak memory consumption was 13.2 MB. Max. memory is 11.5 GB. [2019-01-12 11:24:38,104 INFO L168 Benchmark]: TraceAbstraction took 5471.33 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 936.3 MB in the end (delta: 177.7 MB). Peak memory consumption was 177.7 MB. Max. memory is 11.5 GB. [2019-01-12 11:24:38,105 INFO L168 Benchmark]: Witness Printer took 70.94 ms. Allocated memory is still 1.2 GB. Free memory is still 936.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-01-12 11:24:38,113 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 272.12 ms. Allocated memory is still 1.0 GB. Free memory was 948.7 MB in the beginning and 937.9 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 37.35 ms. Allocated memory is still 1.0 GB. Free memory is still 937.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 24.74 ms. Allocated memory is still 1.0 GB. Free memory was 937.9 MB in the beginning and 932.6 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 372.22 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 138.4 MB). Free memory was 932.6 MB in the beginning and 1.1 GB in the end (delta: -181.4 MB). Peak memory consumption was 13.2 MB. Max. memory is 11.5 GB. * TraceAbstraction took 5471.33 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 936.3 MB in the end (delta: 177.7 MB). Peak memory consumption was 177.7 MB. Max. memory is 11.5 GB. * Witness Printer took 70.94 ms. Allocated memory is still 1.2 GB. Free memory is still 936.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 31]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 10]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 1 error locations. SAFE Result, 5.3s OverallTime, 6 OverallIterations, 4 TraceHistogramMax, 0.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 63 SDtfs, 33 SDslu, 123 SDs, 0 SdLazy, 139 SolverSat, 13 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 72 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 3.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred in iteration=5, 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, 9 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 4 NumberOfFragments, 2 HoareAnnotationTreeSize, 2 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 2 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 4.1s InterpolantComputationTime, 101 NumberOfCodeBlocks, 101 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 92 ConstructedInterpolants, 0 QuantifiedInterpolants, 6562 SizeOfPredicates, 11 NumberOfNonLiveVariables, 158 ConjunctsInSsa, 51 ConjunctsInUnsatCore, 9 InterpolantComputations, 3 PerfectInterpolantSequences, 26/50 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...