java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/sum04-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-02 11:29:15,524 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-02 11:29:15,526 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-02 11:29:15,537 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-02 11:29:15,538 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-02 11:29:15,539 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-02 11:29:15,540 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-02 11:29:15,542 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-02 11:29:15,544 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-02 11:29:15,544 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-02 11:29:15,545 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-02 11:29:15,546 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-02 11:29:15,547 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-02 11:29:15,548 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-02 11:29:15,548 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-02 11:29:15,550 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-02 11:29:15,550 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-02 11:29:15,551 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-02 11:29:15,553 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-02 11:29:15,555 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-02 11:29:15,556 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-02 11:29:15,557 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-02 11:29:15,558 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-02 11:29:15,559 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-02 11:29:15,561 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-02 11:29:15,563 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-02 11:29:15,564 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-02 11:29:15,565 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-02 11:29:15,565 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-02 11:29:15,566 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-02 11:29:15,567 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-02 11:29:15,567 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-02 11:29:15,568 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-02 11:29:15,568 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-02 11:29:15,569 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-02 11:29:15,569 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-02 11:29:15,570 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-02 11:29:15,588 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-02 11:29:15,588 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-02 11:29:15,590 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-02 11:29:15,591 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-02 11:29:15,591 INFO L138 SettingsManager]: * Use SBE=true [2019-10-02 11:29:15,591 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-02 11:29:15,591 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-02 11:29:15,591 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-02 11:29:15,592 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-02 11:29:15,592 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-02 11:29:15,593 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-02 11:29:15,593 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-02 11:29:15,593 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-02 11:29:15,594 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-02 11:29:15,594 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-02 11:29:15,594 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-02 11:29:15,594 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-02 11:29:15,594 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-02 11:29:15,595 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-02 11:29:15,595 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-02 11:29:15,595 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-02 11:29:15,595 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 11:29:15,596 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-02 11:29:15,596 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-02 11:29:15,596 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-02 11:29:15,596 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-02 11:29:15,597 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-02 11:29:15,597 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-02 11:29:15,597 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-02 11:29:15,648 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-02 11:29:15,666 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-02 11:29:15,669 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-02 11:29:15,671 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-02 11:29:15,671 INFO L275 PluginConnector]: CDTParser initialized [2019-10-02 11:29:15,672 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum04-1.i [2019-10-02 11:29:15,740 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d23c8f0f/80ef5b669ecf4f7cbcd322224ef44eac/FLAGfcff9afa1 [2019-10-02 11:29:16,179 INFO L306 CDTParser]: Found 1 translation units. [2019-10-02 11:29:16,180 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum04-1.i [2019-10-02 11:29:16,187 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d23c8f0f/80ef5b669ecf4f7cbcd322224ef44eac/FLAGfcff9afa1 [2019-10-02 11:29:16,536 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d23c8f0f/80ef5b669ecf4f7cbcd322224ef44eac [2019-10-02 11:29:16,546 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-02 11:29:16,547 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-02 11:29:16,548 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-02 11:29:16,548 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-02 11:29:16,551 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-02 11:29:16,552 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 11:29:16" (1/1) ... [2019-10-02 11:29:16,554 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fddbff9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:29:16, skipping insertion in model container [2019-10-02 11:29:16,554 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 11:29:16" (1/1) ... [2019-10-02 11:29:16,561 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-02 11:29:16,573 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-02 11:29:16,748 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 11:29:16,754 INFO L188 MainTranslator]: Completed pre-run [2019-10-02 11:29:16,766 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 11:29:16,779 INFO L192 MainTranslator]: Completed translation [2019-10-02 11:29:16,780 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:29:16 WrapperNode [2019-10-02 11:29:16,780 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-02 11:29:16,781 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-02 11:29:16,781 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-02 11:29:16,781 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-02 11:29:16,875 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:29:16" (1/1) ... [2019-10-02 11:29:16,875 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:29:16" (1/1) ... [2019-10-02 11:29:16,879 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:29:16" (1/1) ... [2019-10-02 11:29:16,879 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:29:16" (1/1) ... [2019-10-02 11:29:16,882 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:29:16" (1/1) ... [2019-10-02 11:29:16,886 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:29:16" (1/1) ... [2019-10-02 11:29:16,887 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:29:16" (1/1) ... [2019-10-02 11:29:16,888 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-02 11:29:16,888 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-02 11:29:16,888 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-02 11:29:16,889 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-02 11:29:16,890 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:29:16" (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 [2019-10-02 11:29:16,948 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-02 11:29:16,948 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-02 11:29:16,949 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-02 11:29:16,949 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-02 11:29:16,949 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-02 11:29:16,950 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-02 11:29:16,950 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-02 11:29:16,950 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-02 11:29:16,950 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-02 11:29:17,109 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-02 11:29:17,109 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-02 11:29:17,110 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 11:29:17 BoogieIcfgContainer [2019-10-02 11:29:17,110 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-02 11:29:17,111 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-02 11:29:17,112 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-02 11:29:17,114 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-02 11:29:17,115 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.10 11:29:16" (1/3) ... [2019-10-02 11:29:17,116 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6aa2c822 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 11:29:17, skipping insertion in model container [2019-10-02 11:29:17,116 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:29:16" (2/3) ... [2019-10-02 11:29:17,116 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6aa2c822 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 11:29:17, skipping insertion in model container [2019-10-02 11:29:17,116 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 11:29:17" (3/3) ... [2019-10-02 11:29:17,118 INFO L109 eAbstractionObserver]: Analyzing ICFG sum04-1.i [2019-10-02 11:29:17,127 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-02 11:29:17,134 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-02 11:29:17,147 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-02 11:29:17,172 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-10-02 11:29:17,172 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-02 11:29:17,173 INFO L378 AbstractCegarLoop]: Hoare is true [2019-10-02 11:29:17,173 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-02 11:29:17,173 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-02 11:29:17,173 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-02 11:29:17,173 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-02 11:29:17,174 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-02 11:29:17,174 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-02 11:29:17,188 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-10-02 11:29:17,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-02 11:29:17,193 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:29:17,193 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:29:17,195 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:29:17,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:29:17,200 INFO L82 PathProgramCache]: Analyzing trace with hash -721501374, now seen corresponding path program 1 times [2019-10-02 11:29:17,201 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:29:17,201 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:29:17,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:29:17,242 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:29:17,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:29:17,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 11:29:17,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:29:17,295 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 11:29:17,296 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-02 11:29:17,299 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-02 11:29:17,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-02 11:29:17,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-02 11:29:17,311 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2019-10-02 11:29:17,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:29:17,328 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2019-10-02 11:29:17,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-02 11:29:17,329 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-10-02 11:29:17,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:29:17,335 INFO L225 Difference]: With dead ends: 30 [2019-10-02 11:29:17,336 INFO L226 Difference]: Without dead ends: 13 [2019-10-02 11:29:17,338 INFO L640 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 [2019-10-02 11:29:17,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-10-02 11:29:17,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-10-02 11:29:17,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-10-02 11:29:17,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2019-10-02 11:29:17,374 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2019-10-02 11:29:17,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:29:17,374 INFO L475 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2019-10-02 11:29:17,374 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-02 11:29:17,374 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2019-10-02 11:29:17,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-02 11:29:17,375 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:29:17,375 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:29:17,376 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:29:17,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:29:17,376 INFO L82 PathProgramCache]: Analyzing trace with hash -731660105, now seen corresponding path program 1 times [2019-10-02 11:29:17,376 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:29:17,377 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:29:17,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:29:17,378 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:29:17,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:29:17,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 11:29:17,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:29:17,422 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 11:29:17,422 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-02 11:29:17,423 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-02 11:29:17,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-02 11:29:17,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 11:29:17,424 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 3 states. [2019-10-02 11:29:17,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:29:17,486 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2019-10-02 11:29:17,487 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-02 11:29:17,487 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-10-02 11:29:17,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:29:17,488 INFO L225 Difference]: With dead ends: 24 [2019-10-02 11:29:17,489 INFO L226 Difference]: Without dead ends: 16 [2019-10-02 11:29:17,490 INFO L640 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 [2019-10-02 11:29:17,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-10-02 11:29:17,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2019-10-02 11:29:17,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-10-02 11:29:17,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2019-10-02 11:29:17,495 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2019-10-02 11:29:17,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:29:17,496 INFO L475 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2019-10-02 11:29:17,496 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-02 11:29:17,496 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2019-10-02 11:29:17,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-02 11:29:17,497 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:29:17,497 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:29:17,497 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:29:17,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:29:17,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1637338477, now seen corresponding path program 1 times [2019-10-02 11:29:17,498 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:29:17,498 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:29:17,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:29:17,500 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:29:17,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:29:17,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 11:29:17,540 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:29:17,540 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 11:29:17,540 INFO L224 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 [2019-10-02 11:29:17,562 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:29:17,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 11:29:17,586 INFO L256 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-02 11:29:17,592 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:29:17,674 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:29:17,677 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:29:17,678 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2019-10-02 11:29:17,678 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 11:29:17,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 11:29:17,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-02 11:29:17,679 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 6 states. [2019-10-02 11:29:17,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:29:17,747 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2019-10-02 11:29:17,747 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-02 11:29:17,747 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2019-10-02 11:29:17,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:29:17,748 INFO L225 Difference]: With dead ends: 33 [2019-10-02 11:29:17,749 INFO L226 Difference]: Without dead ends: 25 [2019-10-02 11:29:17,749 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-02 11:29:17,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-10-02 11:29:17,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2019-10-02 11:29:17,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-10-02 11:29:17,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2019-10-02 11:29:17,755 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 13 [2019-10-02 11:29:17,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:29:17,756 INFO L475 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2019-10-02 11:29:17,756 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 11:29:17,756 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2019-10-02 11:29:17,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-02 11:29:17,757 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:29:17,758 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:29:17,758 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:29:17,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:29:17,759 INFO L82 PathProgramCache]: Analyzing trace with hash -452912071, now seen corresponding path program 1 times [2019-10-02 11:29:17,759 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:29:17,759 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:29:17,760 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:29:17,760 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:29:17,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:29:17,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 11:29:17,862 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:29:17,863 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 11:29:17,863 INFO L224 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 [2019-10-02 11:29:17,882 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:29:17,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 11:29:17,903 INFO L256 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-02 11:29:17,905 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:29:17,960 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:29:17,963 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-02 11:29:17,963 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2019-10-02 11:29:17,964 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-02 11:29:17,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-02 11:29:17,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-10-02 11:29:17,965 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 9 states. [2019-10-02 11:29:18,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:29:18,045 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2019-10-02 11:29:18,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-02 11:29:18,046 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2019-10-02 11:29:18,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:29:18,049 INFO L225 Difference]: With dead ends: 39 [2019-10-02 11:29:18,049 INFO L226 Difference]: Without dead ends: 34 [2019-10-02 11:29:18,050 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-10-02 11:29:18,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-10-02 11:29:18,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2019-10-02 11:29:18,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-02 11:29:18,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2019-10-02 11:29:18,066 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 22 [2019-10-02 11:29:18,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:29:18,067 INFO L475 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2019-10-02 11:29:18,067 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-02 11:29:18,067 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2019-10-02 11:29:18,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-10-02 11:29:18,069 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:29:18,069 INFO L411 BasicCegarLoop]: trace histogram [7, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:29:18,070 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:29:18,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:29:18,070 INFO L82 PathProgramCache]: Analyzing trace with hash -1902732141, now seen corresponding path program 2 times [2019-10-02 11:29:18,070 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:29:18,070 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:29:18,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:29:18,073 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:29:18,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:29:18,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 11:29:18,245 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:29:18,246 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 11:29:18,246 INFO L224 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 [2019-10-02 11:29:18,262 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-02 11:29:18,277 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-02 11:29:18,278 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:29:18,279 INFO L256 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-02 11:29:18,281 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:29:18,293 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (4)] Exception during sending of exit command (exit): Broken pipe [2019-10-02 11:29:18,302 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-02 11:29:18,303 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2019-10-02 11:29:18,303 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-02 11:29:18,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-02 11:29:18,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-10-02 11:29:18,304 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 10 states. [2019-10-02 11:29:18,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:29:18,401 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2019-10-02 11:29:18,402 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-02 11:29:18,402 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2019-10-02 11:29:18,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:29:18,403 INFO L225 Difference]: With dead ends: 40 [2019-10-02 11:29:18,404 INFO L226 Difference]: Without dead ends: 35 [2019-10-02 11:29:18,404 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-10-02 11:29:18,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-10-02 11:29:18,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2019-10-02 11:29:18,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-10-02 11:29:18,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2019-10-02 11:29:18,416 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 31 [2019-10-02 11:29:18,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:29:18,416 INFO L475 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2019-10-02 11:29:18,416 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-02 11:29:18,416 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2019-10-02 11:29:18,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-10-02 11:29:18,421 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:29:18,421 INFO L411 BasicCegarLoop]: trace histogram [8, 8, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:29:18,421 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:29:18,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:29:18,421 INFO L82 PathProgramCache]: Analyzing trace with hash 749989817, now seen corresponding path program 3 times [2019-10-02 11:29:18,422 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:29:18,422 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:29:18,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:29:18,423 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:29:18,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:29:18,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-02 11:29:18,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-02 11:29:18,503 INFO L478 BasicCegarLoop]: Counterexample might be feasible [2019-10-02 11:29:18,524 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.10 11:29:18 BoogieIcfgContainer [2019-10-02 11:29:18,525 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-02 11:29:18,527 INFO L168 Benchmark]: Toolchain (without parser) took 1979.39 ms. Allocated memory was 133.2 MB in the beginning and 225.4 MB in the end (delta: 92.3 MB). Free memory was 89.1 MB in the beginning and 184.7 MB in the end (delta: -95.6 MB). There was no memory consumed. Max. memory is 7.1 GB. [2019-10-02 11:29:18,528 INFO L168 Benchmark]: CDTParser took 0.51 ms. Allocated memory is still 133.2 MB. Free memory was 107.5 MB in the beginning and 107.2 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-10-02 11:29:18,529 INFO L168 Benchmark]: CACSL2BoogieTranslator took 232.19 ms. Allocated memory is still 133.2 MB. Free memory was 88.9 MB in the beginning and 79.8 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. [2019-10-02 11:29:18,530 INFO L168 Benchmark]: Boogie Preprocessor took 107.47 ms. Allocated memory was 133.2 MB in the beginning and 200.3 MB in the end (delta: 67.1 MB). Free memory was 79.8 MB in the beginning and 177.3 MB in the end (delta: -97.5 MB). Peak memory consumption was 16.1 MB. Max. memory is 7.1 GB. [2019-10-02 11:29:18,531 INFO L168 Benchmark]: RCFGBuilder took 222.17 ms. Allocated memory is still 200.3 MB. Free memory was 177.3 MB in the beginning and 166.0 MB in the end (delta: 11.2 MB). Peak memory consumption was 11.2 MB. Max. memory is 7.1 GB. [2019-10-02 11:29:18,532 INFO L168 Benchmark]: TraceAbstraction took 1413.37 ms. Allocated memory was 200.3 MB in the beginning and 225.4 MB in the end (delta: 25.2 MB). Free memory was 165.4 MB in the beginning and 184.7 MB in the end (delta: -19.3 MB). Peak memory consumption was 5.9 MB. Max. memory is 7.1 GB. [2019-10-02 11:29:18,536 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.51 ms. Allocated memory is still 133.2 MB. Free memory was 107.5 MB in the beginning and 107.2 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 232.19 ms. Allocated memory is still 133.2 MB. Free memory was 88.9 MB in the beginning and 79.8 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 107.47 ms. Allocated memory was 133.2 MB in the beginning and 200.3 MB in the end (delta: 67.1 MB). Free memory was 79.8 MB in the beginning and 177.3 MB in the end (delta: -97.5 MB). Peak memory consumption was 16.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 222.17 ms. Allocated memory is still 200.3 MB. Free memory was 177.3 MB in the beginning and 166.0 MB in the end (delta: 11.2 MB). Peak memory consumption was 11.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1413.37 ms. Allocated memory was 200.3 MB in the beginning and 225.4 MB in the end (delta: 25.2 MB). Free memory was 165.4 MB in the beginning and 184.7 MB in the end (delta: -19.3 MB). Peak memory consumption was 5.9 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, sn=0; [L13] i=1 VAL [i=1, sn=0] [L13] COND TRUE i<=8 VAL [i=1, sn=0] [L14] COND TRUE i<4 [L15] sn = sn + (2) VAL [i=1, sn=2] [L13] i++ VAL [i=2, sn=2] [L13] COND TRUE i<=8 VAL [i=2, sn=2] [L14] COND TRUE i<4 [L15] sn = sn + (2) VAL [i=2, sn=4] [L13] i++ VAL [i=3, sn=4] [L13] COND TRUE i<=8 VAL [i=3, sn=4] [L14] COND TRUE i<4 [L15] sn = sn + (2) VAL [i=3, sn=6] [L13] i++ VAL [i=4, sn=6] [L13] COND TRUE i<=8 VAL [i=4, sn=6] [L14] COND FALSE !(i<4) VAL [i=4, sn=6] [L13] i++ VAL [i=5, sn=6] [L13] COND TRUE i<=8 VAL [i=5, sn=6] [L14] COND FALSE !(i<4) VAL [i=5, sn=6] [L13] i++ VAL [i=6, sn=6] [L13] COND TRUE i<=8 VAL [i=6, sn=6] [L14] COND FALSE !(i<4) VAL [i=6, sn=6] [L13] i++ VAL [i=7, sn=6] [L13] COND TRUE i<=8 VAL [i=7, sn=6] [L14] COND FALSE !(i<4) VAL [i=7, sn=6] [L13] i++ VAL [i=8, sn=6] [L13] COND TRUE i<=8 VAL [i=8, sn=6] [L14] COND FALSE !(i<4) VAL [i=8, sn=6] [L13] i++ VAL [i=9, sn=6] [L13] COND FALSE !(i<=8) VAL [i=9, sn=6] [L17] CALL __VERIFIER_assert(sn==8*(2) || sn == 0) VAL [\old(cond)=0] [L4] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L5] __VERIFIER_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 19 locations, 1 error locations. UNSAFE Result, 1.3s OverallTime, 6 OverallIterations, 8 TraceHistogramMax, 0.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 61 SDtfs, 53 SDslu, 80 SDs, 0 SdLazy, 90 SolverSat, 22 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 89 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=35occurred 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, 5 MinimizatonAttempts, 5 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 186 NumberOfCodeBlocks, 186 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 144 ConstructedInterpolants, 0 QuantifiedInterpolants, 6942 SizeOfPredicates, 2 NumberOfNonLiveVariables, 134 ConjunctsInSsa, 18 ConjunctsInUnsatCore, 8 InterpolantComputations, 3 PerfectInterpolantSequences, 8/186 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...