java -Xmx8000000000 -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 ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/sum01_false-unreach-call_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-06 22:37:53,407 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-06 22:37:53,409 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-06 22:37:53,428 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-06 22:37:53,428 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-06 22:37:53,430 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-06 22:37:53,432 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-06 22:37:53,434 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-06 22:37:53,438 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-06 22:37:53,439 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-06 22:37:53,447 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-06 22:37:53,447 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-06 22:37:53,448 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-06 22:37:53,449 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-06 22:37:53,451 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-06 22:37:53,452 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-06 22:37:53,452 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-06 22:37:53,456 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-06 22:37:53,459 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-06 22:37:53,463 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-06 22:37:53,467 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-06 22:37:53,469 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-06 22:37:53,474 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-06 22:37:53,474 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-06 22:37:53,475 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-06 22:37:53,476 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-06 22:37:53,478 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-06 22:37:53,479 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-06 22:37:53,480 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-06 22:37:53,483 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-06 22:37:53,483 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-06 22:37:53,484 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-11-06 22:37:53,488 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2018-11-06 22:37:53,514 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-06 22:37:53,514 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-06 22:37:53,516 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-06 22:37:53,516 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-11-06 22:37:53,517 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-06 22:37:53,519 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-06 22:37:53,519 INFO L133 SettingsManager]: * Use SBE=true [2018-11-06 22:37:53,520 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-06 22:37:53,520 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-06 22:37:53,520 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-06 22:37:53,520 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-06 22:37:53,520 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-06 22:37:53,521 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-06 22:37:53,521 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-06 22:37:53,521 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-06 22:37:53,521 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-06 22:37:53,521 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-06 22:37:53,523 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-06 22:37:53,523 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-06 22:37:53,523 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-06 22:37:53,523 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-06 22:37:53,524 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-06 22:37:53,524 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-06 22:37:53,524 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-06 22:37:53,524 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-06 22:37:53,525 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-06 22:37:53,525 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-06 22:37:53,525 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-06 22:37:53,591 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-06 22:37:53,609 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-06 22:37:53,613 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-06 22:37:53,615 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-06 22:37:53,615 INFO L276 PluginConnector]: CDTParser initialized [2018-11-06 22:37:53,616 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01_false-unreach-call_true-termination.i [2018-11-06 22:37:53,681 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed8e1ff56/dafc1ea7b8ae4a219d06354b6e501dd6/FLAGabe74e2a2 [2018-11-06 22:37:54,104 INFO L298 CDTParser]: Found 1 translation units. [2018-11-06 22:37:54,105 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum01_false-unreach-call_true-termination.i [2018-11-06 22:37:54,111 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed8e1ff56/dafc1ea7b8ae4a219d06354b6e501dd6/FLAGabe74e2a2 [2018-11-06 22:37:54,126 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed8e1ff56/dafc1ea7b8ae4a219d06354b6e501dd6 [2018-11-06 22:37:54,136 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-06 22:37:54,137 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-06 22:37:54,138 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-06 22:37:54,139 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-06 22:37:54,143 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-06 22:37:54,144 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:37:54" (1/1) ... [2018-11-06 22:37:54,147 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56927dda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:54, skipping insertion in model container [2018-11-06 22:37:54,147 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:37:54" (1/1) ... [2018-11-06 22:37:54,158 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-06 22:37:54,184 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-06 22:37:54,375 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-06 22:37:54,379 INFO L189 MainTranslator]: Completed pre-run [2018-11-06 22:37:54,397 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-06 22:37:54,413 INFO L193 MainTranslator]: Completed translation [2018-11-06 22:37:54,413 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:54 WrapperNode [2018-11-06 22:37:54,414 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-06 22:37:54,415 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-06 22:37:54,415 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-06 22:37:54,415 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-06 22:37:54,425 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:54" (1/1) ... [2018-11-06 22:37:54,431 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:54" (1/1) ... [2018-11-06 22:37:54,448 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-06 22:37:54,449 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-06 22:37:54,449 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-06 22:37:54,449 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-06 22:37:54,457 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:54" (1/1) ... [2018-11-06 22:37:54,458 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:54" (1/1) ... [2018-11-06 22:37:54,458 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:54" (1/1) ... [2018-11-06 22:37:54,459 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:54" (1/1) ... [2018-11-06 22:37:54,460 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:54" (1/1) ... [2018-11-06 22:37:54,465 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:54" (1/1) ... [2018-11-06 22:37:54,466 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:54" (1/1) ... [2018-11-06 22:37:54,467 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-06 22:37:54,467 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-06 22:37:54,468 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-06 22:37:54,468 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-06 22:37:54,469 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:54" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-06 22:37:54,599 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-06 22:37:54,600 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-06 22:37:54,788 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-06 22:37:54,789 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:37:54 BoogieIcfgContainer [2018-11-06 22:37:54,789 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-06 22:37:54,790 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-06 22:37:54,790 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-06 22:37:54,793 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-06 22:37:54,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:37:54" (1/3) ... [2018-11-06 22:37:54,795 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@453bb99c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:37:54, skipping insertion in model container [2018-11-06 22:37:54,795 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:54" (2/3) ... [2018-11-06 22:37:54,795 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@453bb99c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:37:54, skipping insertion in model container [2018-11-06 22:37:54,795 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:37:54" (3/3) ... [2018-11-06 22:37:54,797 INFO L112 eAbstractionObserver]: Analyzing ICFG sum01_false-unreach-call_true-termination.i [2018-11-06 22:37:54,808 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-06 22:37:54,817 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-06 22:37:54,835 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-06 22:37:54,873 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-11-06 22:37:54,873 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-06 22:37:54,874 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-06 22:37:54,874 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-06 22:37:54,874 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-06 22:37:54,874 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-06 22:37:54,874 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-06 22:37:54,875 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-06 22:37:54,875 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-06 22:37:54,889 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states. [2018-11-06 22:37:54,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-11-06 22:37:54,896 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:37:54,897 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-11-06 22:37:54,899 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:37:54,906 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:37:54,906 INFO L82 PathProgramCache]: Analyzing trace with hash 889968487, now seen corresponding path program 1 times [2018-11-06 22:37:54,908 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:37:54,908 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:37:54,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:37:54,959 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:37:54,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:37:54,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:37:55,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:37:55,027 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-06 22:37:55,027 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-06 22:37:55,032 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-06 22:37:55,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-06 22:37:55,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-06 22:37:55,051 INFO L87 Difference]: Start difference. First operand 14 states. Second operand 2 states. [2018-11-06 22:37:55,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:37:55,068 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2018-11-06 22:37:55,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-06 22:37:55,069 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2018-11-06 22:37:55,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:37:55,078 INFO L225 Difference]: With dead ends: 22 [2018-11-06 22:37:55,079 INFO L226 Difference]: Without dead ends: 10 [2018-11-06 22:37:55,082 INFO L604 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 [2018-11-06 22:37:55,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-11-06 22:37:55,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-11-06 22:37:55,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-11-06 22:37:55,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2018-11-06 22:37:55,119 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 6 [2018-11-06 22:37:55,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:37:55,120 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2018-11-06 22:37:55,120 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-06 22:37:55,120 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2018-11-06 22:37:55,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-11-06 22:37:55,121 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:37:55,121 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:37:55,122 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:37:55,122 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:37:55,122 INFO L82 PathProgramCache]: Analyzing trace with hash 1805899826, now seen corresponding path program 1 times [2018-11-06 22:37:55,122 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:37:55,123 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:37:55,124 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:37:55,124 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:37:55,124 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:37:55,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:37:55,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:37:55,303 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-06 22:37:55,304 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-06 22:37:55,306 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-06 22:37:55,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-06 22:37:55,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-06 22:37:55,307 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand 4 states. [2018-11-06 22:37:55,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:37:55,519 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2018-11-06 22:37:55,520 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-06 22:37:55,520 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2018-11-06 22:37:55,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:37:55,521 INFO L225 Difference]: With dead ends: 18 [2018-11-06 22:37:55,521 INFO L226 Difference]: Without dead ends: 14 [2018-11-06 22:37:55,523 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-11-06 22:37:55,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-11-06 22:37:55,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-11-06 22:37:55,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-11-06 22:37:55,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2018-11-06 22:37:55,527 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 7 [2018-11-06 22:37:55,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:37:55,527 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2018-11-06 22:37:55,528 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-06 22:37:55,528 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2018-11-06 22:37:55,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-11-06 22:37:55,529 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:37:55,529 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:37:55,529 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:37:55,530 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:37:55,530 INFO L82 PathProgramCache]: Analyzing trace with hash -466386423, now seen corresponding path program 1 times [2018-11-06 22:37:55,530 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:37:55,530 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:37:55,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:37:55,532 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:37:55,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:37:55,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:37:55,930 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 14 [2018-11-06 22:37:56,119 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:37:56,119 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:37:56,122 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:37:56,144 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:37:56,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:37:56,187 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:37:56,639 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:37:56,669 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:37:56,669 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2018-11-06 22:37:56,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-06 22:37:56,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-06 22:37:56,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2018-11-06 22:37:56,672 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 13 states. [2018-11-06 22:37:57,189 WARN L179 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 15 [2018-11-06 22:37:57,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:37:57,438 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2018-11-06 22:37:57,438 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-06 22:37:57,439 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2018-11-06 22:37:57,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:37:57,440 INFO L225 Difference]: With dead ends: 38 [2018-11-06 22:37:57,440 INFO L226 Difference]: Without dead ends: 22 [2018-11-06 22:37:57,441 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2018-11-06 22:37:57,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-11-06 22:37:57,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2018-11-06 22:37:57,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-11-06 22:37:57,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2018-11-06 22:37:57,447 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 11 [2018-11-06 22:37:57,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:37:57,447 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2018-11-06 22:37:57,447 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-06 22:37:57,448 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2018-11-06 22:37:57,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-11-06 22:37:57,448 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:37:57,449 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:37:57,449 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:37:57,449 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:37:57,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1824047545, now seen corresponding path program 1 times [2018-11-06 22:37:57,450 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:37:57,450 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:37:57,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:37:57,451 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:37:57,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:37:57,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:37:57,524 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:37:57,525 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:37:57,525 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:37:57,537 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:37:57,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:37:57,555 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:37:57,560 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:37:57,584 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:37:57,584 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-11-06 22:37:57,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-06 22:37:57,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-06 22:37:57,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-11-06 22:37:57,586 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 5 states. [2018-11-06 22:37:57,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:37:57,654 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2018-11-06 22:37:57,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-06 22:37:57,655 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2018-11-06 22:37:57,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:37:57,656 INFO L225 Difference]: With dead ends: 30 [2018-11-06 22:37:57,657 INFO L226 Difference]: Without dead ends: 22 [2018-11-06 22:37:57,658 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-11-06 22:37:57,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-11-06 22:37:57,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2018-11-06 22:37:57,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-11-06 22:37:57,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-11-06 22:37:57,663 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2018-11-06 22:37:57,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:37:57,664 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-11-06 22:37:57,664 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-06 22:37:57,664 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-11-06 22:37:57,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-11-06 22:37:57,665 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:37:57,665 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2018-11-06 22:37:57,666 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:37:57,666 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:37:57,666 INFO L82 PathProgramCache]: Analyzing trace with hash 49040183, now seen corresponding path program 2 times [2018-11-06 22:37:57,666 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:37:57,666 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:37:57,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:37:57,668 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:37:57,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:37:57,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:37:57,967 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-11-06 22:37:57,967 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:37:57,968 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:37:57,984 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:37:58,011 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:37:58,011 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:37:58,015 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:37:58,392 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:37:58,415 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:37:58,415 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 18 [2018-11-06 22:37:58,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-06 22:37:58,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-06 22:37:58,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2018-11-06 22:37:58,417 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 18 states. [2018-11-06 22:37:59,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:37:59,232 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2018-11-06 22:37:59,233 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-11-06 22:37:59,234 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 19 [2018-11-06 22:37:59,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:37:59,235 INFO L225 Difference]: With dead ends: 42 [2018-11-06 22:37:59,235 INFO L226 Difference]: Without dead ends: 30 [2018-11-06 22:37:59,237 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=172, Invalid=884, Unknown=0, NotChecked=0, Total=1056 [2018-11-06 22:37:59,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-11-06 22:37:59,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2018-11-06 22:37:59,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-11-06 22:37:59,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2018-11-06 22:37:59,242 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 19 [2018-11-06 22:37:59,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:37:59,243 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2018-11-06 22:37:59,243 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-06 22:37:59,243 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2018-11-06 22:37:59,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-11-06 22:37:59,244 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:37:59,244 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:37:59,245 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:37:59,245 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:37:59,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1293648665, now seen corresponding path program 2 times [2018-11-06 22:37:59,245 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:37:59,246 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:37:59,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:37:59,247 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:37:59,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:37:59,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:37:59,327 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 14 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:37:59,328 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:37:59,328 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:37:59,339 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:37:59,352 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:37:59,352 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:37:59,355 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:37:59,362 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 14 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:37:59,382 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:37:59,382 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-11-06 22:37:59,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-06 22:37:59,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-06 22:37:59,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-11-06 22:37:59,384 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 7 states. [2018-11-06 22:37:59,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:37:59,439 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2018-11-06 22:37:59,443 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-06 22:37:59,443 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2018-11-06 22:37:59,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:37:59,444 INFO L225 Difference]: With dead ends: 42 [2018-11-06 22:37:59,444 INFO L226 Difference]: Without dead ends: 34 [2018-11-06 22:37:59,445 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-11-06 22:37:59,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-11-06 22:37:59,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2018-11-06 22:37:59,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-11-06 22:37:59,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2018-11-06 22:37:59,451 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 27 [2018-11-06 22:37:59,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:37:59,451 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2018-11-06 22:37:59,451 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-06 22:37:59,451 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2018-11-06 22:37:59,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-11-06 22:37:59,452 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:37:59,453 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:37:59,453 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:37:59,453 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:37:59,453 INFO L82 PathProgramCache]: Analyzing trace with hash -595864258, now seen corresponding path program 3 times [2018-11-06 22:37:59,454 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:37:59,454 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:37:59,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:37:59,455 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:37:59,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:37:59,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:37:59,562 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 17 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:37:59,562 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:37:59,562 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:37:59,572 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:37:59,589 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-11-06 22:37:59,590 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:37:59,592 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:37:59,600 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 17 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:37:59,622 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:37:59,623 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-11-06 22:37:59,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-06 22:37:59,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-06 22:37:59,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-11-06 22:37:59,624 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 8 states. [2018-11-06 22:37:59,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:37:59,674 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2018-11-06 22:37:59,674 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-06 22:37:59,674 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2018-11-06 22:37:59,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:37:59,675 INFO L225 Difference]: With dead ends: 46 [2018-11-06 22:37:59,675 INFO L226 Difference]: Without dead ends: 38 [2018-11-06 22:37:59,676 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-11-06 22:37:59,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-11-06 22:37:59,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2018-11-06 22:37:59,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-11-06 22:37:59,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2018-11-06 22:37:59,682 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 31 [2018-11-06 22:37:59,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:37:59,683 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2018-11-06 22:37:59,683 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-06 22:37:59,683 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2018-11-06 22:37:59,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-11-06 22:37:59,684 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:37:59,684 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:37:59,685 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:37:59,685 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:37:59,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1064380949, now seen corresponding path program 4 times [2018-11-06 22:37:59,685 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:37:59,686 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:37:59,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:37:59,687 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:37:59,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:37:59,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:37:59,937 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 20 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:37:59,938 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:37:59,938 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:37:59,951 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:37:59,973 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:37:59,973 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:37:59,975 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:37:59,990 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 20 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:38:00,010 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:38:00,011 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-11-06 22:38:00,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-06 22:38:00,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-06 22:38:00,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-11-06 22:38:00,012 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 9 states. [2018-11-06 22:38:00,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:38:00,398 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2018-11-06 22:38:00,399 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-06 22:38:00,399 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2018-11-06 22:38:00,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:38:00,400 INFO L225 Difference]: With dead ends: 50 [2018-11-06 22:38:00,400 INFO L226 Difference]: Without dead ends: 42 [2018-11-06 22:38:00,401 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-11-06 22:38:00,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-11-06 22:38:00,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2018-11-06 22:38:00,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-11-06 22:38:00,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2018-11-06 22:38:00,407 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 35 [2018-11-06 22:38:00,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:38:00,407 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2018-11-06 22:38:00,407 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-06 22:38:00,407 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2018-11-06 22:38:00,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-11-06 22:38:00,409 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:38:00,409 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:38:00,409 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:38:00,410 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:38:00,410 INFO L82 PathProgramCache]: Analyzing trace with hash -881706132, now seen corresponding path program 5 times [2018-11-06 22:38:00,410 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:38:00,410 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:38:00,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:38:00,411 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:38:00,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:38:00,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:38:00,552 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 23 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:38:00,552 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:38:00,553 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:38:00,561 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 22:38:00,581 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-11-06 22:38:00,581 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:38:00,584 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:38:00,595 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 23 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:38:00,617 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:38:00,617 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-11-06 22:38:00,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-06 22:38:00,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-06 22:38:00,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-11-06 22:38:00,619 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 10 states. [2018-11-06 22:38:00,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:38:00,981 INFO L93 Difference]: Finished difference Result 54 states and 58 transitions. [2018-11-06 22:38:00,982 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-06 22:38:00,982 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2018-11-06 22:38:00,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:38:00,983 INFO L225 Difference]: With dead ends: 54 [2018-11-06 22:38:00,983 INFO L226 Difference]: Without dead ends: 46 [2018-11-06 22:38:00,984 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-11-06 22:38:00,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-11-06 22:38:00,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2018-11-06 22:38:00,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-11-06 22:38:00,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2018-11-06 22:38:00,990 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 39 [2018-11-06 22:38:00,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:38:00,990 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2018-11-06 22:38:00,991 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-06 22:38:00,991 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2018-11-06 22:38:00,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-11-06 22:38:00,992 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:38:00,992 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:38:00,992 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:38:00,993 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:38:00,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1665976643, now seen corresponding path program 6 times [2018-11-06 22:38:00,993 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:38:00,993 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:38:00,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:38:00,994 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:38:00,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:38:01,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:38:01,145 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 26 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:38:01,145 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:38:01,146 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:38:01,157 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-06 22:38:01,181 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-11-06 22:38:01,182 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:38:01,185 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:38:01,197 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 26 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:38:01,219 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:38:01,220 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-11-06 22:38:01,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-06 22:38:01,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-06 22:38:01,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-11-06 22:38:01,221 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 11 states. [2018-11-06 22:38:01,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:38:01,296 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2018-11-06 22:38:01,297 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-06 22:38:01,297 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 43 [2018-11-06 22:38:01,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:38:01,299 INFO L225 Difference]: With dead ends: 58 [2018-11-06 22:38:01,299 INFO L226 Difference]: Without dead ends: 50 [2018-11-06 22:38:01,299 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-11-06 22:38:01,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-11-06 22:38:01,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2018-11-06 22:38:01,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-11-06 22:38:01,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2018-11-06 22:38:01,305 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 43 [2018-11-06 22:38:01,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:38:01,306 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2018-11-06 22:38:01,306 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-06 22:38:01,306 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2018-11-06 22:38:01,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-11-06 22:38:01,309 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:38:01,309 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:38:01,309 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:38:01,309 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:38:01,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1290703770, now seen corresponding path program 7 times [2018-11-06 22:38:01,310 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:38:01,310 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:38:01,311 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:38:01,311 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:38:01,312 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:38:01,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-06 22:38:01,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-06 22:38:01,363 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-11-06 22:38:01,391 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 10:38:01 BoogieIcfgContainer [2018-11-06 22:38:01,391 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-06 22:38:01,392 INFO L168 Benchmark]: Toolchain (without parser) took 7255.62 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 715.1 MB). Free memory was 1.4 GB in the beginning and 1.7 GB in the end (delta: -345.8 MB). Peak memory consumption was 369.4 MB. Max. memory is 7.1 GB. [2018-11-06 22:38:01,393 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-06 22:38:01,394 INFO L168 Benchmark]: CACSL2BoogieTranslator took 275.84 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-11-06 22:38:01,395 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.01 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-06 22:38:01,395 INFO L168 Benchmark]: Boogie Preprocessor took 18.24 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-06 22:38:01,396 INFO L168 Benchmark]: RCFGBuilder took 321.93 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 715.1 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -766.9 MB). Peak memory consumption was 26.6 MB. Max. memory is 7.1 GB. [2018-11-06 22:38:01,397 INFO L168 Benchmark]: TraceAbstraction took 6600.98 ms. Allocated memory is still 2.2 GB. Free memory was 2.2 GB in the beginning and 1.7 GB in the end (delta: 410.6 MB). Peak memory consumption was 410.6 MB. Max. memory is 7.1 GB. [2018-11-06 22:38:01,401 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 275.84 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 34.01 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 18.24 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 321.93 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 715.1 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -766.9 MB). Peak memory consumption was 26.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6600.98 ms. Allocated memory is still 2.2 GB. Free memory was 2.2 GB in the beginning and 1.7 GB in the end (delta: 410.6 MB). Peak memory consumption was 410.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int i, n=__VERIFIER_nondet_uint(), sn=0; [L12] int i, n=__VERIFIER_nondet_uint(), sn=0; [L13] i=1 [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND FALSE !(i<10) [L13] i++ [L13] COND FALSE !(i<=n) [L17] CALL __VERIFIER_assert(sn==n*(2) || sn == 0) [L4] COND TRUE !(cond) [L5] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 14 locations, 1 error locations. UNSAFE Result, 6.5s OverallTime, 11 OverallIterations, 11 TraceHistogramMax, 2.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 86 SDtfs, 73 SDslu, 284 SDs, 0 SdLazy, 470 SolverSat, 27 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 313 GetRequests, 223 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 3.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=49occurred in iteration=10, 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, 10 MinimizatonAttempts, 9 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.6s InterpolantComputationTime, 508 NumberOfCodeBlocks, 508 NumberOfCodeBlocksAsserted, 45 NumberOfCheckSat, 443 ConstructedInterpolants, 0 QuantifiedInterpolants, 40857 SizeOfPredicates, 16 NumberOfNonLiveVariables, 426 ConjunctsInSsa, 82 ConjunctsInUnsatCore, 18 InterpolantComputations, 2 PerfectInterpolantSequences, 224/1096 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...