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/recursive/Ackermann04.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-08 06:12:28,384 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-08 06:12:28,386 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-08 06:12:28,399 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-08 06:12:28,400 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-08 06:12:28,401 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-08 06:12:28,402 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-08 06:12:28,404 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-08 06:12:28,406 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-08 06:12:28,407 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-08 06:12:28,408 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-08 06:12:28,409 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-08 06:12:28,410 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-08 06:12:28,411 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-08 06:12:28,414 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-08 06:12:28,416 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-08 06:12:28,417 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-08 06:12:28,421 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-08 06:12:28,424 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-08 06:12:28,428 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-08 06:12:28,433 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-08 06:12:28,435 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-08 06:12:28,439 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-08 06:12:28,440 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-08 06:12:28,444 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-09-08 06:12:28,444 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-09-08 06:12:28,444 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-09-08 06:12:28,447 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-09-08 06:12:28,449 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-09-08 06:12:28,450 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-09-08 06:12:28,450 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-08 06:12:28,453 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-08 06:12:28,454 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-08 06:12:28,454 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-08 06:12:28,457 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-08 06:12:28,457 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-08 06:12:28,458 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-08 06:12:28,458 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-08 06:12:28,459 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-08 06:12:28,460 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-08 06:12:28,461 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-08 06:12:28,462 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 [2019-09-08 06:12:28,489 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-08 06:12:28,489 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-08 06:12:28,494 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-08 06:12:28,494 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-08 06:12:28,494 INFO L138 SettingsManager]: * Use SBE=true [2019-09-08 06:12:28,494 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-08 06:12:28,495 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-08 06:12:28,495 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-08 06:12:28,495 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-08 06:12:28,495 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-08 06:12:28,496 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-08 06:12:28,497 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-08 06:12:28,497 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-08 06:12:28,497 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-08 06:12:28,498 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-08 06:12:28,498 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-08 06:12:28,498 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-08 06:12:28,498 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-08 06:12:28,498 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-08 06:12:28,499 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-08 06:12:28,499 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-08 06:12:28,499 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-08 06:12:28,499 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-08 06:12:28,500 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-08 06:12:28,500 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-08 06:12:28,500 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-08 06:12:28,500 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-08 06:12:28,501 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-08 06:12:28,501 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-08 06:12:28,556 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-08 06:12:28,570 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-08 06:12:28,576 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-08 06:12:28,578 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-08 06:12:28,581 INFO L275 PluginConnector]: CDTParser initialized [2019-09-08 06:12:28,582 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Ackermann04.c [2019-09-08 06:12:28,652 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c4a224071/541a5c12ed9d437785e377d49285732f/FLAG2663025b7 [2019-09-08 06:12:29,105 INFO L306 CDTParser]: Found 1 translation units. [2019-09-08 06:12:29,105 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Ackermann04.c [2019-09-08 06:12:29,113 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c4a224071/541a5c12ed9d437785e377d49285732f/FLAG2663025b7 [2019-09-08 06:12:29,534 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c4a224071/541a5c12ed9d437785e377d49285732f [2019-09-08 06:12:29,548 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-08 06:12:29,549 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-08 06:12:29,551 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-08 06:12:29,551 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-08 06:12:29,555 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-08 06:12:29,556 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.09 06:12:29" (1/1) ... [2019-09-08 06:12:29,559 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c16251c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:12:29, skipping insertion in model container [2019-09-08 06:12:29,559 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.09 06:12:29" (1/1) ... [2019-09-08 06:12:29,567 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-08 06:12:29,589 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-08 06:12:29,768 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-08 06:12:29,771 INFO L188 MainTranslator]: Completed pre-run [2019-09-08 06:12:29,787 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-08 06:12:29,798 INFO L192 MainTranslator]: Completed translation [2019-09-08 06:12:29,799 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:12:29 WrapperNode [2019-09-08 06:12:29,799 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-08 06:12:29,800 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-08 06:12:29,800 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-08 06:12:29,800 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-08 06:12:29,902 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:12:29" (1/1) ... [2019-09-08 06:12:29,902 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:12:29" (1/1) ... [2019-09-08 06:12:29,907 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:12:29" (1/1) ... [2019-09-08 06:12:29,907 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:12:29" (1/1) ... [2019-09-08 06:12:29,919 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:12:29" (1/1) ... [2019-09-08 06:12:29,921 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:12:29" (1/1) ... [2019-09-08 06:12:29,922 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:12:29" (1/1) ... [2019-09-08 06:12:29,924 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-08 06:12:29,925 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-08 06:12:29,925 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-08 06:12:29,925 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-08 06:12:29,926 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:12:29" (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 [2019-09-08 06:12:29,983 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-08 06:12:29,984 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-08 06:12:29,984 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2019-09-08 06:12:29,985 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-08 06:12:29,985 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-08 06:12:29,985 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-08 06:12:29,985 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2019-09-08 06:12:29,985 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-08 06:12:29,985 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-08 06:12:29,986 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-08 06:12:30,196 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-08 06:12:30,196 INFO L283 CfgBuilder]: Removed 0 assume(true) statements. [2019-09-08 06:12:30,198 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.09 06:12:30 BoogieIcfgContainer [2019-09-08 06:12:30,198 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-08 06:12:30,199 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-08 06:12:30,199 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-08 06:12:30,202 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-08 06:12:30,203 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.09 06:12:29" (1/3) ... [2019-09-08 06:12:30,204 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13d0ddcc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.09 06:12:30, skipping insertion in model container [2019-09-08 06:12:30,204 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:12:29" (2/3) ... [2019-09-08 06:12:30,204 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13d0ddcc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.09 06:12:30, skipping insertion in model container [2019-09-08 06:12:30,204 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.09 06:12:30" (3/3) ... [2019-09-08 06:12:30,206 INFO L109 eAbstractionObserver]: Analyzing ICFG Ackermann04.c [2019-09-08 06:12:30,218 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-08 06:12:30,227 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-08 06:12:30,246 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-08 06:12:30,300 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-08 06:12:30,301 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-08 06:12:30,302 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-08 06:12:30,302 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-08 06:12:30,302 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-08 06:12:30,302 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-08 06:12:30,303 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-08 06:12:30,303 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-08 06:12:30,303 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-08 06:12:30,329 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2019-09-08 06:12:30,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-09-08 06:12:30,342 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:12:30,343 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:12:30,346 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:12:30,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:12:30,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1796234678, now seen corresponding path program 1 times [2019-09-08 06:12:30,355 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:12:30,356 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:12:30,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:12:30,412 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:12:30,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:12:30,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:12:30,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 06:12:30,566 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-08 06:12:30,566 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-08 06:12:30,570 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-08 06:12:30,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-08 06:12:30,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-08 06:12:30,583 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 5 states. [2019-09-08 06:12:30,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:12:30,730 INFO L93 Difference]: Finished difference Result 55 states and 77 transitions. [2019-09-08 06:12:30,731 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-08 06:12:30,732 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2019-09-08 06:12:30,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:12:30,747 INFO L225 Difference]: With dead ends: 55 [2019-09-08 06:12:30,748 INFO L226 Difference]: Without dead ends: 28 [2019-09-08 06:12:30,753 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-08 06:12:30,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-09-08 06:12:30,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-09-08 06:12:30,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-09-08 06:12:30,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2019-09-08 06:12:30,801 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 15 [2019-09-08 06:12:30,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:12:30,802 INFO L475 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2019-09-08 06:12:30,802 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-08 06:12:30,802 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2019-09-08 06:12:30,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-09-08 06:12:30,805 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:12:30,805 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:12:30,806 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:12:30,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:12:30,806 INFO L82 PathProgramCache]: Analyzing trace with hash -895156504, now seen corresponding path program 1 times [2019-09-08 06:12:30,807 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:12:30,807 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:12:30,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:12:30,809 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:12:30,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:12:30,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:12:30,885 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-08 06:12:30,886 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:12:30,886 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-08 06:12:30,910 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:12:30,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:12:30,952 INFO L256 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 4 conjunts are in the unsatisfiable core [2019-09-08 06:12:30,959 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:12:31,000 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-08 06:12:31,011 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:12:31,011 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2019-09-08 06:12:31,016 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-08 06:12:31,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-08 06:12:31,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-08 06:12:31,020 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand 5 states. [2019-09-08 06:12:31,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:12:31,169 INFO L93 Difference]: Finished difference Result 52 states and 77 transitions. [2019-09-08 06:12:31,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-08 06:12:31,172 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2019-09-08 06:12:31,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:12:31,175 INFO L225 Difference]: With dead ends: 52 [2019-09-08 06:12:31,177 INFO L226 Difference]: Without dead ends: 30 [2019-09-08 06:12:31,180 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-08 06:12:31,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-09-08 06:12:31,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-09-08 06:12:31,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-09-08 06:12:31,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2019-09-08 06:12:31,201 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 22 [2019-09-08 06:12:31,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:12:31,205 INFO L475 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2019-09-08 06:12:31,206 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-08 06:12:31,206 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2019-09-08 06:12:31,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-09-08 06:12:31,211 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:12:31,211 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:12:31,212 INFO L418 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:12:31,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:12:31,212 INFO L82 PathProgramCache]: Analyzing trace with hash 718507263, now seen corresponding path program 1 times [2019-09-08 06:12:31,212 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:12:31,213 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:12:31,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:12:31,214 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:12:31,215 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:12:31,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:12:31,350 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-09-08 06:12:31,351 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:12:31,351 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:12:31,369 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:12:31,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:12:31,407 INFO L256 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-08 06:12:31,413 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:12:31,460 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-09-08 06:12:31,465 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:12:31,465 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2019-09-08 06:12:31,466 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-08 06:12:31,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-08 06:12:31,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-09-08 06:12:31,467 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand 6 states. [2019-09-08 06:12:31,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:12:31,635 INFO L93 Difference]: Finished difference Result 48 states and 71 transitions. [2019-09-08 06:12:31,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-08 06:12:31,635 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 35 [2019-09-08 06:12:31,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:12:31,639 INFO L225 Difference]: With dead ends: 48 [2019-09-08 06:12:31,639 INFO L226 Difference]: Without dead ends: 44 [2019-09-08 06:12:31,640 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-09-08 06:12:31,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-09-08 06:12:31,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-09-08 06:12:31,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-09-08 06:12:31,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 67 transitions. [2019-09-08 06:12:31,672 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 67 transitions. Word has length 35 [2019-09-08 06:12:31,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:12:31,675 INFO L475 AbstractCegarLoop]: Abstraction has 44 states and 67 transitions. [2019-09-08 06:12:31,675 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-08 06:12:31,675 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 67 transitions. [2019-09-08 06:12:31,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-09-08 06:12:31,682 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:12:31,683 INFO L399 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:12:31,683 INFO L418 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:12:31,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:12:31,684 INFO L82 PathProgramCache]: Analyzing trace with hash -506207890, now seen corresponding path program 2 times [2019-09-08 06:12:31,684 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:12:31,684 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:12:31,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:12:31,685 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:12:31,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:12:31,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:12:31,854 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-09-08 06:12:31,855 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:12:31,855 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-08 06:12:31,870 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:12:31,915 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 06:12:31,915 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:12:31,916 INFO L256 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-08 06:12:31,922 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:12:31,961 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (4)] Exception during sending of exit command (exit): Stream closed [2019-09-08 06:12:31,965 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:12:31,965 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2019-09-08 06:12:31,967 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-08 06:12:31,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-08 06:12:31,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-09-08 06:12:31,968 INFO L87 Difference]: Start difference. First operand 44 states and 67 transitions. Second operand 7 states. [2019-09-08 06:12:32,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:12:32,112 INFO L93 Difference]: Finished difference Result 83 states and 143 transitions. [2019-09-08 06:12:32,113 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-08 06:12:32,113 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 48 [2019-09-08 06:12:32,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:12:32,117 INFO L225 Difference]: With dead ends: 83 [2019-09-08 06:12:32,117 INFO L226 Difference]: Without dead ends: 79 [2019-09-08 06:12:32,118 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-09-08 06:12:32,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-09-08 06:12:32,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2019-09-08 06:12:32,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-09-08 06:12:32,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 139 transitions. [2019-09-08 06:12:32,140 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 139 transitions. Word has length 48 [2019-09-08 06:12:32,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:12:32,141 INFO L475 AbstractCegarLoop]: Abstraction has 79 states and 139 transitions. [2019-09-08 06:12:32,141 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-08 06:12:32,141 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 139 transitions. [2019-09-08 06:12:32,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2019-09-08 06:12:32,150 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:12:32,150 INFO L399 BasicCegarLoop]: trace histogram [17, 17, 11, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:12:32,150 INFO L418 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:12:32,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:12:32,151 INFO L82 PathProgramCache]: Analyzing trace with hash -2091057537, now seen corresponding path program 3 times [2019-09-08 06:12:32,151 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:12:32,151 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:12:32,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:12:32,152 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:12:32,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:12:32,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:12:32,556 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 60 proven. 318 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2019-09-08 06:12:32,557 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:12:32,557 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:12:32,576 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 06:12:32,655 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2019-09-08 06:12:32,655 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:12:32,657 INFO L256 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 19 conjunts are in the unsatisfiable core [2019-09-08 06:12:32,667 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:12:32,900 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 182 proven. 101 refuted. 0 times theorem prover too weak. 386 trivial. 0 not checked. [2019-09-08 06:12:32,912 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:12:32,912 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2019-09-08 06:12:32,913 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-09-08 06:12:32,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-09-08 06:12:32,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2019-09-08 06:12:32,914 INFO L87 Difference]: Start difference. First operand 79 states and 139 transitions. Second operand 23 states. [2019-09-08 06:12:34,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:12:34,483 INFO L93 Difference]: Finished difference Result 167 states and 381 transitions. [2019-09-08 06:12:34,487 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-09-08 06:12:34,487 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 122 [2019-09-08 06:12:34,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:12:34,492 INFO L225 Difference]: With dead ends: 167 [2019-09-08 06:12:34,492 INFO L226 Difference]: Without dead ends: 78 [2019-09-08 06:12:34,501 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=488, Invalid=2062, Unknown=0, NotChecked=0, Total=2550 [2019-09-08 06:12:34,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-09-08 06:12:34,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 75. [2019-09-08 06:12:34,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-09-08 06:12:34,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 114 transitions. [2019-09-08 06:12:34,535 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 114 transitions. Word has length 122 [2019-09-08 06:12:34,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:12:34,536 INFO L475 AbstractCegarLoop]: Abstraction has 75 states and 114 transitions. [2019-09-08 06:12:34,536 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-09-08 06:12:34,538 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 114 transitions. [2019-09-08 06:12:34,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-09-08 06:12:34,549 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:12:34,549 INFO L399 BasicCegarLoop]: trace histogram [15, 15, 9, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:12:34,550 INFO L418 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:12:34,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:12:34,550 INFO L82 PathProgramCache]: Analyzing trace with hash -2010206023, now seen corresponding path program 4 times [2019-09-08 06:12:34,553 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:12:34,553 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:12:34,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:12:34,559 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:12:34,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:12:34,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:12:34,899 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 140 proven. 174 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2019-09-08 06:12:34,900 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:12:34,900 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:12:34,918 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 06:12:34,964 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 06:12:34,964 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:12:34,966 INFO L256 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 19 conjunts are in the unsatisfiable core [2019-09-08 06:12:34,971 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:12:35,003 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 286 proven. 71 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2019-09-08 06:12:35,015 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:12:35,015 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 13] total 20 [2019-09-08 06:12:35,016 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-09-08 06:12:35,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-09-08 06:12:35,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2019-09-08 06:12:35,017 INFO L87 Difference]: Start difference. First operand 75 states and 114 transitions. Second operand 20 states. [2019-09-08 06:12:35,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:12:35,849 INFO L93 Difference]: Finished difference Result 149 states and 259 transitions. [2019-09-08 06:12:35,849 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-09-08 06:12:35,849 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 108 [2019-09-08 06:12:35,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:12:35,852 INFO L225 Difference]: With dead ends: 149 [2019-09-08 06:12:35,852 INFO L226 Difference]: Without dead ends: 84 [2019-09-08 06:12:35,855 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=291, Invalid=1515, Unknown=0, NotChecked=0, Total=1806 [2019-09-08 06:12:35,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-09-08 06:12:35,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 75. [2019-09-08 06:12:35,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-09-08 06:12:35,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 106 transitions. [2019-09-08 06:12:35,868 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 106 transitions. Word has length 108 [2019-09-08 06:12:35,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:12:35,869 INFO L475 AbstractCegarLoop]: Abstraction has 75 states and 106 transitions. [2019-09-08 06:12:35,869 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-09-08 06:12:35,869 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 106 transitions. [2019-09-08 06:12:35,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-09-08 06:12:35,872 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:12:35,872 INFO L399 BasicCegarLoop]: trace histogram [19, 19, 11, 8, 7, 7, 7, 7, 7, 7, 7, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:12:35,872 INFO L418 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:12:35,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:12:35,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1835077495, now seen corresponding path program 5 times [2019-09-08 06:12:35,873 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:12:35,873 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:12:35,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:12:35,874 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:12:35,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:12:35,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:12:36,041 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 139 proven. 297 refuted. 0 times theorem prover too weak. 399 trivial. 0 not checked. [2019-09-08 06:12:36,042 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:12:36,042 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:12:36,059 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-08 06:12:36,105 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2019-09-08 06:12:36,105 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:12:36,107 INFO L256 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 21 conjunts are in the unsatisfiable core [2019-09-08 06:12:36,113 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:12:36,144 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 475 proven. 114 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (7)] Exception during sending of exit command (exit): Broken pipe [2019-09-08 06:12:36,158 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:12:36,159 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2019-09-08 06:12:36,159 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-08 06:12:36,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-08 06:12:36,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2019-09-08 06:12:36,160 INFO L87 Difference]: Start difference. First operand 75 states and 106 transitions. Second operand 14 states. [2019-09-08 06:12:36,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:12:36,618 INFO L93 Difference]: Finished difference Result 158 states and 261 transitions. [2019-09-08 06:12:36,618 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-09-08 06:12:36,618 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 134 [2019-09-08 06:12:36,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:12:36,620 INFO L225 Difference]: With dead ends: 158 [2019-09-08 06:12:36,621 INFO L226 Difference]: Without dead ends: 93 [2019-09-08 06:12:36,622 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=203, Invalid=853, Unknown=0, NotChecked=0, Total=1056 [2019-09-08 06:12:36,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2019-09-08 06:12:36,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 90. [2019-09-08 06:12:36,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2019-09-08 06:12:36,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 132 transitions. [2019-09-08 06:12:36,650 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 132 transitions. Word has length 134 [2019-09-08 06:12:36,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:12:36,651 INFO L475 AbstractCegarLoop]: Abstraction has 90 states and 132 transitions. [2019-09-08 06:12:36,651 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-08 06:12:36,651 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 132 transitions. [2019-09-08 06:12:36,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2019-09-08 06:12:36,657 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:12:36,657 INFO L399 BasicCegarLoop]: trace histogram [23, 23, 13, 10, 9, 9, 9, 9, 9, 9, 9, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:12:36,658 INFO L418 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:12:36,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:12:36,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1434361927, now seen corresponding path program 6 times [2019-09-08 06:12:36,659 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:12:36,659 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:12:36,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:12:36,661 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:12:36,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:12:36,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:12:36,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 421 proven. 286 refuted. 0 times theorem prover too weak. 539 trivial. 0 not checked. [2019-09-08 06:12:36,971 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:12:36,972 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:12:36,983 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-08 06:12:37,056 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2019-09-08 06:12:37,057 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:12:37,058 INFO L256 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 35 conjunts are in the unsatisfiable core [2019-09-08 06:12:37,063 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:12:37,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 421 proven. 286 refuted. 0 times theorem prover too weak. 539 trivial. 0 not checked. [2019-09-08 06:12:37,113 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:12:37,113 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2019-09-08 06:12:37,114 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-09-08 06:12:37,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-09-08 06:12:37,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2019-09-08 06:12:37,114 INFO L87 Difference]: Start difference. First operand 90 states and 132 transitions. Second operand 20 states. [2019-09-08 06:12:37,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:12:37,961 INFO L93 Difference]: Finished difference Result 204 states and 351 transitions. [2019-09-08 06:12:37,962 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-09-08 06:12:37,962 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 160 [2019-09-08 06:12:37,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:12:37,965 INFO L225 Difference]: With dead ends: 204 [2019-09-08 06:12:37,966 INFO L226 Difference]: Without dead ends: 124 [2019-09-08 06:12:37,969 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=456, Invalid=2196, Unknown=0, NotChecked=0, Total=2652 [2019-09-08 06:12:37,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2019-09-08 06:12:38,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 114. [2019-09-08 06:12:38,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2019-09-08 06:12:38,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 176 transitions. [2019-09-08 06:12:38,018 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 176 transitions. Word has length 160 [2019-09-08 06:12:38,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:12:38,019 INFO L475 AbstractCegarLoop]: Abstraction has 114 states and 176 transitions. [2019-09-08 06:12:38,019 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-09-08 06:12:38,019 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 176 transitions. [2019-09-08 06:12:38,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2019-09-08 06:12:38,022 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:12:38,022 INFO L399 BasicCegarLoop]: trace histogram [25, 25, 14, 11, 10, 10, 10, 10, 10, 10, 10, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:12:38,022 INFO L418 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:12:38,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:12:38,023 INFO L82 PathProgramCache]: Analyzing trace with hash -66876812, now seen corresponding path program 7 times [2019-09-08 06:12:38,023 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:12:38,023 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:12:38,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:12:38,024 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:12:38,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:12:38,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:12:38,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 477 proven. 372 refuted. 0 times theorem prover too weak. 634 trivial. 0 not checked. [2019-09-08 06:12:38,329 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:12:38,329 INFO L223 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) [2019-09-08 06:12:38,354 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:12:38,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:12:38,417 INFO L256 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 37 conjunts are in the unsatisfiable core [2019-09-08 06:12:38,422 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:12:38,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 477 proven. 372 refuted. 0 times theorem prover too weak. 634 trivial. 0 not checked. [2019-09-08 06:12:38,499 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:12:38,500 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2019-09-08 06:12:38,503 INFO L454 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-09-08 06:12:38,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-09-08 06:12:38,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2019-09-08 06:12:38,505 INFO L87 Difference]: Start difference. First operand 114 states and 176 transitions. Second operand 21 states. [2019-09-08 06:12:39,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:12:39,418 INFO L93 Difference]: Finished difference Result 243 states and 437 transitions. [2019-09-08 06:12:39,418 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-09-08 06:12:39,418 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 173 [2019-09-08 06:12:39,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:12:39,422 INFO L225 Difference]: With dead ends: 243 [2019-09-08 06:12:39,422 INFO L226 Difference]: Without dead ends: 139 [2019-09-08 06:12:39,426 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 766 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=536, Invalid=2544, Unknown=0, NotChecked=0, Total=3080 [2019-09-08 06:12:39,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2019-09-08 06:12:39,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 129. [2019-09-08 06:12:39,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2019-09-08 06:12:39,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 206 transitions. [2019-09-08 06:12:39,461 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 206 transitions. Word has length 173 [2019-09-08 06:12:39,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:12:39,463 INFO L475 AbstractCegarLoop]: Abstraction has 129 states and 206 transitions. [2019-09-08 06:12:39,463 INFO L476 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-09-08 06:12:39,463 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 206 transitions. [2019-09-08 06:12:39,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2019-09-08 06:12:39,468 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:12:39,468 INFO L399 BasicCegarLoop]: trace histogram [27, 27, 15, 12, 11, 11, 11, 11, 11, 11, 11, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:12:39,468 INFO L418 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:12:39,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:12:39,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1028004289, now seen corresponding path program 8 times [2019-09-08 06:12:39,469 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:12:39,469 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:12:39,470 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:12:39,470 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:12:39,470 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:12:39,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:12:39,774 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 657 proven. 84 refuted. 0 times theorem prover too weak. 1000 trivial. 0 not checked. [2019-09-08 06:12:39,774 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:12:39,774 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:12:39,792 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 06:12:39,872 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 06:12:39,872 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:12:39,874 INFO L256 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 40 conjunts are in the unsatisfiable core [2019-09-08 06:12:39,880 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:12:39,958 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 657 proven. 84 refuted. 0 times theorem prover too weak. 1000 trivial. 0 not checked. [2019-09-08 06:12:39,966 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:12:39,967 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2019-09-08 06:12:39,967 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-09-08 06:12:39,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-09-08 06:12:39,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2019-09-08 06:12:39,968 INFO L87 Difference]: Start difference. First operand 129 states and 206 transitions. Second operand 23 states. [2019-09-08 06:12:40,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:12:40,527 INFO L93 Difference]: Finished difference Result 158 states and 244 transitions. [2019-09-08 06:12:40,532 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-09-08 06:12:40,532 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 186 [2019-09-08 06:12:40,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:12:40,533 INFO L225 Difference]: With dead ends: 158 [2019-09-08 06:12:40,534 INFO L226 Difference]: Without dead ends: 0 [2019-09-08 06:12:40,536 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=313, Invalid=1667, Unknown=0, NotChecked=0, Total=1980 [2019-09-08 06:12:40,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-08 06:12:40,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-08 06:12:40,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-08 06:12:40,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-08 06:12:40,537 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 186 [2019-09-08 06:12:40,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:12:40,538 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-08 06:12:40,538 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-09-08 06:12:40,538 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-08 06:12:40,538 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-08 06:12:40,543 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-09-08 06:12:42,131 WARN L188 SmtUtils]: Spent 468.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 40 [2019-09-08 06:12:42,239 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2019-09-08 06:12:42,239 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2019-09-08 06:12:42,239 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-09-08 06:12:42,239 INFO L446 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2019-09-08 06:12:42,240 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2019-09-08 06:12:42,240 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-09-08 06:12:42,240 INFO L443 ceAbstractionStarter]: For program point ackermannEXIT(lines 14 22) no Hoare annotation was computed. [2019-09-08 06:12:42,240 INFO L446 ceAbstractionStarter]: At program point ackermannENTRY(lines 14 22) the Hoare annotation is: true [2019-09-08 06:12:42,240 INFO L439 ceAbstractionStarter]: At program point L21(line 21) the Hoare annotation is: (and (= ackermann_~m |ackermann_#in~m|) (<= |ackermann_#in~n| ackermann_~n) (not (= ackermann_~m 0))) [2019-09-08 06:12:42,241 INFO L443 ceAbstractionStarter]: For program point L21-1(line 21) no Hoare annotation was computed. [2019-09-08 06:12:42,241 INFO L439 ceAbstractionStarter]: At program point L19(line 19) the Hoare annotation is: (and (<= |ackermann_#in~n| 0) (= ackermann_~m |ackermann_#in~m|) (<= |ackermann_#in~n| ackermann_~n) (not (= ackermann_~m 0))) [2019-09-08 06:12:42,241 INFO L439 ceAbstractionStarter]: At program point L21-2(line 21) the Hoare annotation is: (let ((.cse3 (<= |ackermann_#in~m| 1)) (.cse0 (<= 5 |ackermann_#t~ret1|)) (.cse1 (<= |ackermann_#in~n| 2)) (.cse2 (<= |ackermann_#in~n| 1))) (and (not (<= |ackermann_#in~m| 0)) (or (and .cse0 (<= (+ |ackermann_#in~n| 1) |ackermann_#t~ret1|)) (and (<= 4 |ackermann_#t~ret1|) (<= |ackermann_#in~n| 3)) (and (<= 3 |ackermann_#t~ret1|) .cse1) (and .cse2 (and .cse3 (<= 2 |ackermann_#t~ret1|)))) (let ((.cse4 (= ackermann_~m |ackermann_#in~m|)) (.cse5 (<= |ackermann_#in~n| ackermann_~n))) (or (and .cse4 .cse5 .cse3) (and .cse0 .cse4 .cse1 .cse5 (<= |ackermann_#in~m| 2)) (and .cse4 .cse5 .cse2) (and .cse4 .cse5 (<= 6 |ackermann_#t~ret1|)))))) [2019-09-08 06:12:42,241 INFO L443 ceAbstractionStarter]: For program point L18(lines 18 20) no Hoare annotation was computed. [2019-09-08 06:12:42,241 INFO L443 ceAbstractionStarter]: For program point L19-1(line 19) no Hoare annotation was computed. [2019-09-08 06:12:42,241 INFO L443 ceAbstractionStarter]: For program point L21-3(line 21) no Hoare annotation was computed. [2019-09-08 06:12:42,242 INFO L443 ceAbstractionStarter]: For program point L15(lines 15 17) no Hoare annotation was computed. [2019-09-08 06:12:42,242 INFO L443 ceAbstractionStarter]: For program point ackermannFINAL(lines 14 22) no Hoare annotation was computed. [2019-09-08 06:12:42,242 INFO L443 ceAbstractionStarter]: For program point L33(lines 33 38) no Hoare annotation was computed. [2019-09-08 06:12:42,242 INFO L443 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 43) no Hoare annotation was computed. [2019-09-08 06:12:42,242 INFO L446 ceAbstractionStarter]: At program point mainENTRY(lines 25 45) the Hoare annotation is: true [2019-09-08 06:12:42,242 INFO L443 ceAbstractionStarter]: For program point L27(lines 27 31) no Hoare annotation was computed. [2019-09-08 06:12:42,243 INFO L443 ceAbstractionStarter]: For program point mainEXIT(lines 25 45) no Hoare annotation was computed. [2019-09-08 06:12:42,243 INFO L443 ceAbstractionStarter]: For program point mainFINAL(lines 25 45) no Hoare annotation was computed. [2019-09-08 06:12:42,243 INFO L443 ceAbstractionStarter]: For program point L43(line 43) no Hoare annotation was computed. [2019-09-08 06:12:42,243 INFO L443 ceAbstractionStarter]: For program point L40(lines 40 44) no Hoare annotation was computed. [2019-09-08 06:12:42,243 INFO L446 ceAbstractionStarter]: At program point L39(line 39) the Hoare annotation is: true [2019-09-08 06:12:42,243 INFO L443 ceAbstractionStarter]: For program point L39-1(line 39) no Hoare annotation was computed. [2019-09-08 06:12:42,249 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 08.09 06:12:42 BoogieIcfgContainer [2019-09-08 06:12:42,249 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-08 06:12:42,252 INFO L168 Benchmark]: Toolchain (without parser) took 12701.37 ms. Allocated memory was 142.1 MB in the beginning and 383.8 MB in the end (delta: 241.7 MB). Free memory was 89.2 MB in the beginning and 188.5 MB in the end (delta: -99.2 MB). Peak memory consumption was 213.9 MB. Max. memory is 7.1 GB. [2019-09-08 06:12:42,254 INFO L168 Benchmark]: CDTParser took 0.54 ms. Allocated memory is still 142.1 MB. Free memory was 107.0 MB in the beginning and 106.8 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-08 06:12:42,255 INFO L168 Benchmark]: CACSL2BoogieTranslator took 249.12 ms. Allocated memory is still 142.1 MB. Free memory was 89.0 MB in the beginning and 79.7 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2019-09-08 06:12:42,260 INFO L168 Benchmark]: Boogie Preprocessor took 124.48 ms. Allocated memory was 142.1 MB in the beginning and 200.8 MB in the end (delta: 58.7 MB). Free memory was 79.7 MB in the beginning and 178.1 MB in the end (delta: -98.4 MB). Peak memory consumption was 11.2 MB. Max. memory is 7.1 GB. [2019-09-08 06:12:42,261 INFO L168 Benchmark]: RCFGBuilder took 273.18 ms. Allocated memory is still 200.8 MB. Free memory was 178.1 MB in the beginning and 165.6 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. [2019-09-08 06:12:42,262 INFO L168 Benchmark]: TraceAbstraction took 12050.14 ms. Allocated memory was 200.8 MB in the beginning and 383.8 MB in the end (delta: 183.0 MB). Free memory was 165.6 MB in the beginning and 188.5 MB in the end (delta: -22.8 MB). Peak memory consumption was 231.6 MB. Max. memory is 7.1 GB. [2019-09-08 06:12:42,275 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.54 ms. Allocated memory is still 142.1 MB. Free memory was 107.0 MB in the beginning and 106.8 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 249.12 ms. Allocated memory is still 142.1 MB. Free memory was 89.0 MB in the beginning and 79.7 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 124.48 ms. Allocated memory was 142.1 MB in the beginning and 200.8 MB in the end (delta: 58.7 MB). Free memory was 79.7 MB in the beginning and 178.1 MB in the end (delta: -98.4 MB). Peak memory consumption was 11.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 273.18 ms. Allocated memory is still 200.8 MB. Free memory was 178.1 MB in the beginning and 165.6 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 12050.14 ms. Allocated memory was 200.8 MB in the beginning and 383.8 MB in the end (delta: 183.0 MB). Free memory was 165.6 MB in the beginning and 188.5 MB in the end (delta: -22.8 MB). Peak memory consumption was 231.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 43]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 27 locations, 1 error locations. SAFE Result, 11.9s OverallTime, 10 OverallIterations, 27 TraceHistogramMax, 5.8s AutomataDifference, 0.0s DeadEndRemovalTime, 1.6s HoareAnnotationTime, HoareTripleCheckerStatistics: 251 SDtfs, 176 SDslu, 1276 SDs, 0 SdLazy, 2626 SolverSat, 469 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1359 GetRequests, 1069 SyntacticMatches, 1 SemanticMatches, 289 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2947 ImplicationChecksByTransitivity, 4.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=129occurred in iteration=9, 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: 0.2s AutomataMinimizationTime, 10 MinimizatonAttempts, 35 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 453 PreInvPairs, 938 NumberOfFragments, 119 HoareAnnotationTreeSize, 453 FomulaSimplifications, 18065 FormulaSimplificationTreeSizeReduction, 1.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 3530 FormulaSimplificationTreeSizeReductionInter, 0.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 2.4s InterpolantComputationTime, 1991 NumberOfCodeBlocks, 1907 NumberOfCodeBlocksAsserted, 53 NumberOfCheckSat, 1972 ConstructedInterpolants, 0 QuantifiedInterpolants, 514138 SizeOfPredicates, 64 NumberOfNonLiveVariables, 2659 ConjunctsInSsa, 191 ConjunctsInUnsatCore, 19 InterpolantComputations, 1 PerfectInterpolantSequences, 10528/13156 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...