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-simple/fibo_2calls_4-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-08 06:26:35,814 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-08 06:26:35,817 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-08 06:26:35,835 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-08 06:26:35,835 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-08 06:26:35,837 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-08 06:26:35,838 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-08 06:26:35,840 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-08 06:26:35,842 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-08 06:26:35,843 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-08 06:26:35,845 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-08 06:26:35,846 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-08 06:26:35,846 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-08 06:26:35,847 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-08 06:26:35,848 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-08 06:26:35,850 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-08 06:26:35,851 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-08 06:26:35,852 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-08 06:26:35,854 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-08 06:26:35,857 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-08 06:26:35,858 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-08 06:26:35,860 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-08 06:26:35,861 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-08 06:26:35,862 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-08 06:26:35,865 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-08 06:26:35,874 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-08 06:26:35,875 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-08 06:26:35,876 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-08 06:26:35,877 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 06:26:35,896 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-08 06:26:35,896 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-08 06:26:35,898 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-08 06:26:35,898 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-08 06:26:35,898 INFO L138 SettingsManager]: * Use SBE=true [2019-09-08 06:26:35,899 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-08 06:26:35,899 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-08 06:26:35,899 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-08 06:26:35,899 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-08 06:26:35,899 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-08 06:26:35,900 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-08 06:26:35,900 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-08 06:26:35,900 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-08 06:26:35,900 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-08 06:26:35,901 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-08 06:26:35,901 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-08 06:26:35,901 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-08 06:26:35,901 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-08 06:26:35,902 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-08 06:26:35,902 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-08 06:26:35,902 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-08 06:26:35,902 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-08 06:26:35,902 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-08 06:26:35,903 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-08 06:26:35,903 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-08 06:26:35,903 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-08 06:26:35,903 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-08 06:26:35,904 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-08 06:26:35,904 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-08 06:26:35,966 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-08 06:26:35,982 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-08 06:26:35,987 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-08 06:26:35,989 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-08 06:26:35,990 INFO L275 PluginConnector]: CDTParser initialized [2019-09-08 06:26:35,991 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_4-2.c [2019-09-08 06:26:36,090 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b935e64d/404d1b7798324b7a8c6a3d66e75b2144/FLAG9c5bcabda [2019-09-08 06:26:36,685 INFO L306 CDTParser]: Found 1 translation units. [2019-09-08 06:26:36,686 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_4-2.c [2019-09-08 06:26:36,696 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b935e64d/404d1b7798324b7a8c6a3d66e75b2144/FLAG9c5bcabda [2019-09-08 06:26:37,069 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b935e64d/404d1b7798324b7a8c6a3d66e75b2144 [2019-09-08 06:26:37,085 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-08 06:26:37,087 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-08 06:26:37,088 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-08 06:26:37,088 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-08 06:26:37,094 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-08 06:26:37,095 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.09 06:26:37" (1/1) ... [2019-09-08 06:26:37,099 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60673f7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:26:37, skipping insertion in model container [2019-09-08 06:26:37,099 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.09 06:26:37" (1/1) ... [2019-09-08 06:26:37,109 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-08 06:26:37,128 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-08 06:26:37,342 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-08 06:26:37,349 INFO L188 MainTranslator]: Completed pre-run [2019-09-08 06:26:37,372 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-08 06:26:37,391 INFO L192 MainTranslator]: Completed translation [2019-09-08 06:26:37,392 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:26:37 WrapperNode [2019-09-08 06:26:37,392 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-08 06:26:37,393 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-08 06:26:37,393 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-08 06:26:37,393 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-08 06:26:37,530 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:26:37" (1/1) ... [2019-09-08 06:26:37,531 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:26:37" (1/1) ... [2019-09-08 06:26:37,542 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:26:37" (1/1) ... [2019-09-08 06:26:37,544 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:26:37" (1/1) ... [2019-09-08 06:26:37,552 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:26:37" (1/1) ... [2019-09-08 06:26:37,555 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:26:37" (1/1) ... [2019-09-08 06:26:37,556 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:26:37" (1/1) ... [2019-09-08 06:26:37,558 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-08 06:26:37,559 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-08 06:26:37,559 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-08 06:26:37,559 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-08 06:26:37,561 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:26:37" (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 06:26:37,622 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-08 06:26:37,623 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-08 06:26:37,623 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2019-09-08 06:26:37,623 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2019-09-08 06:26:37,623 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-08 06:26:37,623 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-08 06:26:37,624 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-08 06:26:37,624 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2019-09-08 06:26:37,624 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2019-09-08 06:26:37,624 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-08 06:26:37,624 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-08 06:26:37,625 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-08 06:26:37,863 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-08 06:26:37,864 INFO L283 CfgBuilder]: Removed 0 assume(true) statements. [2019-09-08 06:26:37,866 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.09 06:26:37 BoogieIcfgContainer [2019-09-08 06:26:37,866 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-08 06:26:37,867 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-08 06:26:37,867 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-08 06:26:37,870 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-08 06:26:37,872 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.09 06:26:37" (1/3) ... [2019-09-08 06:26:37,873 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b24b4fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.09 06:26:37, skipping insertion in model container [2019-09-08 06:26:37,873 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:26:37" (2/3) ... [2019-09-08 06:26:37,873 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b24b4fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.09 06:26:37, skipping insertion in model container [2019-09-08 06:26:37,873 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.09 06:26:37" (3/3) ... [2019-09-08 06:26:37,876 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_4-2.c [2019-09-08 06:26:37,887 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-08 06:26:37,896 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-08 06:26:37,916 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-08 06:26:37,959 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-08 06:26:37,960 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-08 06:26:37,961 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-08 06:26:37,961 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-08 06:26:37,961 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-08 06:26:37,961 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-08 06:26:37,961 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-08 06:26:37,962 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-08 06:26:37,962 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-08 06:26:37,984 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2019-09-08 06:26:37,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-09-08 06:26:37,991 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:26:37,993 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:26:37,995 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:26:38,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:26:38,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2019-09-08 06:26:38,004 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:26:38,004 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:26:38,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:26:38,051 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:26:38,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:26:38,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:26:38,209 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 06:26:38,214 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-08 06:26:38,215 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-08 06:26:38,223 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-08 06:26:38,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-08 06:26:38,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-08 06:26:38,257 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2019-09-08 06:26:38,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:26:38,452 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2019-09-08 06:26:38,453 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-08 06:26:38,455 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2019-09-08 06:26:38,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:26:38,466 INFO L225 Difference]: With dead ends: 44 [2019-09-08 06:26:38,466 INFO L226 Difference]: Without dead ends: 30 [2019-09-08 06:26:38,470 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 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 06:26:38,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-09-08 06:26:38,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-09-08 06:26:38,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-09-08 06:26:38,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2019-09-08 06:26:38,531 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2019-09-08 06:26:38,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:26:38,532 INFO L475 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2019-09-08 06:26:38,532 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-08 06:26:38,533 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2019-09-08 06:26:38,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-09-08 06:26:38,535 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:26:38,535 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:26:38,536 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:26:38,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:26:38,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2019-09-08 06:26:38,537 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:26:38,537 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:26:38,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:26:38,539 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:26:38,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:26:38,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:26:38,599 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 06:26:38,600 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-08 06:26:38,600 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-08 06:26:38,602 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-08 06:26:38,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-08 06:26:38,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-08 06:26:38,604 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2019-09-08 06:26:38,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:26:38,699 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2019-09-08 06:26:38,700 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-08 06:26:38,700 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2019-09-08 06:26:38,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:26:38,702 INFO L225 Difference]: With dead ends: 36 [2019-09-08 06:26:38,703 INFO L226 Difference]: Without dead ends: 32 [2019-09-08 06:26:38,704 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 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 06:26:38,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-09-08 06:26:38,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2019-09-08 06:26:38,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-09-08 06:26:38,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2019-09-08 06:26:38,715 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2019-09-08 06:26:38,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:26:38,716 INFO L475 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2019-09-08 06:26:38,716 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-08 06:26:38,717 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2019-09-08 06:26:38,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-09-08 06:26:38,718 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:26:38,719 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:26:38,719 INFO L418 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:26:38,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:26:38,720 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2019-09-08 06:26:38,720 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:26:38,721 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:26:38,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:26:38,723 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:26:38,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:26:38,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:26:38,843 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-08 06:26:38,844 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:26:38,844 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:26:38,877 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:26:38,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:26:38,907 INFO L256 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-08 06:26:38,916 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:26:39,039 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (2)] Exception during sending of exit command (exit): Stream Closed [2019-09-08 06:26:39,047 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:26:39,048 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2019-09-08 06:26:39,049 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-08 06:26:39,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-08 06:26:39,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2019-09-08 06:26:39,052 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 9 states. [2019-09-08 06:26:39,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:26:39,364 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2019-09-08 06:26:39,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-08 06:26:39,366 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2019-09-08 06:26:39,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:26:39,368 INFO L225 Difference]: With dead ends: 58 [2019-09-08 06:26:39,369 INFO L226 Difference]: Without dead ends: 34 [2019-09-08 06:26:39,371 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2019-09-08 06:26:39,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-09-08 06:26:39,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2019-09-08 06:26:39,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-09-08 06:26:39,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2019-09-08 06:26:39,393 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 26 [2019-09-08 06:26:39,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:26:39,394 INFO L475 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2019-09-08 06:26:39,394 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-08 06:26:39,395 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2019-09-08 06:26:39,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-09-08 06:26:39,398 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:26:39,398 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, 1, 1, 1, 1, 1] [2019-09-08 06:26:39,399 INFO L418 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:26:39,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:26:39,400 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2019-09-08 06:26:39,400 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:26:39,400 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:26:39,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:26:39,402 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:26:39,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:26:39,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:26:39,533 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-08 06:26:39,534 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:26:39,534 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 06:26:39,566 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:26:39,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:26:39,600 INFO L256 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-08 06:26:39,603 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:26:39,617 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (3)] Exception during sending of exit command (exit): Broken pipe [2019-09-08 06:26:39,624 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:26:39,624 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2019-09-08 06:26:39,626 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-08 06:26:39,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-08 06:26:39,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-09-08 06:26:39,628 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 7 states. [2019-09-08 06:26:39,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:26:39,797 INFO L93 Difference]: Finished difference Result 43 states and 55 transitions. [2019-09-08 06:26:39,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-08 06:26:39,799 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2019-09-08 06:26:39,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:26:39,805 INFO L225 Difference]: With dead ends: 43 [2019-09-08 06:26:39,806 INFO L226 Difference]: Without dead ends: 39 [2019-09-08 06:26:39,808 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-09-08 06:26:39,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-09-08 06:26:39,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2019-09-08 06:26:39,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-09-08 06:26:39,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2019-09-08 06:26:39,836 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 27 [2019-09-08 06:26:39,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:26:39,837 INFO L475 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2019-09-08 06:26:39,838 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-08 06:26:39,838 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2019-09-08 06:26:39,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-09-08 06:26:39,843 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:26:39,843 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 2, 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, 1, 1, 1, 1] [2019-09-08 06:26:39,845 INFO L418 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:26:39,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:26:39,846 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2019-09-08 06:26:39,846 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:26:39,846 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:26:39,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:26:39,852 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:26:39,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:26:39,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:26:39,967 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-08 06:26:39,968 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:26:39,968 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:26:40,001 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:26:40,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:26:40,023 INFO L256 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-08 06:26:40,026 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:26:40,086 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-09-08 06:26:40,094 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:26:40,094 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 10 [2019-09-08 06:26:40,095 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-08 06:26:40,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-08 06:26:40,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-09-08 06:26:40,096 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand 10 states. [2019-09-08 06:26:40,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:26:40,351 INFO L93 Difference]: Finished difference Result 70 states and 100 transitions. [2019-09-08 06:26:40,352 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-08 06:26:40,352 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2019-09-08 06:26:40,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:26:40,354 INFO L225 Difference]: With dead ends: 70 [2019-09-08 06:26:40,354 INFO L226 Difference]: Without dead ends: 39 [2019-09-08 06:26:40,357 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2019-09-08 06:26:40,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-09-08 06:26:40,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2019-09-08 06:26:40,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-09-08 06:26:40,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 50 transitions. [2019-09-08 06:26:40,365 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 50 transitions. Word has length 39 [2019-09-08 06:26:40,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:26:40,366 INFO L475 AbstractCegarLoop]: Abstraction has 39 states and 50 transitions. [2019-09-08 06:26:40,366 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-08 06:26:40,366 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 50 transitions. [2019-09-08 06:26:40,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-09-08 06:26:40,368 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:26:40,368 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 2, 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, 1, 1, 1, 1, 1] [2019-09-08 06:26:40,368 INFO L418 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:26:40,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:26:40,369 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2019-09-08 06:26:40,369 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:26:40,369 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:26:40,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:26:40,370 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:26:40,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:26:40,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:26:40,518 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-09-08 06:26:40,518 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:26:40,519 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 06:26:40,542 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:26:40,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:26:40,560 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-08 06:26:40,563 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:26:40,638 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (5)] Exception during sending of exit command (exit): Stream closed [2019-09-08 06:26:40,644 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:26:40,645 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2019-09-08 06:26:40,645 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-08 06:26:40,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-08 06:26:40,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2019-09-08 06:26:40,647 INFO L87 Difference]: Start difference. First operand 39 states and 50 transitions. Second operand 14 states. [2019-09-08 06:26:41,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:26:41,279 INFO L93 Difference]: Finished difference Result 102 states and 162 transitions. [2019-09-08 06:26:41,279 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-08 06:26:41,280 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 40 [2019-09-08 06:26:41,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:26:41,283 INFO L225 Difference]: With dead ends: 102 [2019-09-08 06:26:41,283 INFO L226 Difference]: Without dead ends: 69 [2019-09-08 06:26:41,285 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2019-09-08 06:26:41,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-09-08 06:26:41,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 60. [2019-09-08 06:26:41,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-09-08 06:26:41,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 90 transitions. [2019-09-08 06:26:41,308 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 90 transitions. Word has length 40 [2019-09-08 06:26:41,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:26:41,308 INFO L475 AbstractCegarLoop]: Abstraction has 60 states and 90 transitions. [2019-09-08 06:26:41,308 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-08 06:26:41,309 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 90 transitions. [2019-09-08 06:26:41,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-09-08 06:26:41,312 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:26:41,312 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:26:41,312 INFO L418 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:26:41,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:26:41,313 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2019-09-08 06:26:41,313 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:26:41,313 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:26:41,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:26:41,315 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:26:41,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:26:41,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:26:41,417 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-09-08 06:26:41,418 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:26:41,418 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 06:26:41,435 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:26:41,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:26:41,467 INFO L256 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-08 06:26:41,471 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:26:41,503 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (6)] Exception during sending of exit command (exit): Stream closed [2019-09-08 06:26:41,518 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:26:41,518 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2019-09-08 06:26:41,519 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-08 06:26:41,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-08 06:26:41,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2019-09-08 06:26:41,520 INFO L87 Difference]: Start difference. First operand 60 states and 90 transitions. Second operand 8 states. [2019-09-08 06:26:41,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:26:41,681 INFO L93 Difference]: Finished difference Result 85 states and 144 transitions. [2019-09-08 06:26:41,681 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-08 06:26:41,682 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 54 [2019-09-08 06:26:41,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:26:41,687 INFO L225 Difference]: With dead ends: 85 [2019-09-08 06:26:41,688 INFO L226 Difference]: Without dead ends: 81 [2019-09-08 06:26:41,689 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-09-08 06:26:41,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-09-08 06:26:41,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 60. [2019-09-08 06:26:41,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-09-08 06:26:41,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 90 transitions. [2019-09-08 06:26:41,727 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 90 transitions. Word has length 54 [2019-09-08 06:26:41,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:26:41,728 INFO L475 AbstractCegarLoop]: Abstraction has 60 states and 90 transitions. [2019-09-08 06:26:41,729 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-08 06:26:41,729 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 90 transitions. [2019-09-08 06:26:41,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-09-08 06:26:41,736 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:26:41,736 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:26:41,737 INFO L418 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:26:41,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:26:41,738 INFO L82 PathProgramCache]: Analyzing trace with hash -242988780, now seen corresponding path program 1 times [2019-09-08 06:26:41,738 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:26:41,738 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:26:41,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:26:41,741 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:26:41,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:26:41,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:26:41,947 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 13 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-09-08 06:26:41,947 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:26:41,947 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 06:26:41,969 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:26:41,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:26:41,990 INFO L256 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-08 06:26:41,994 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:26:42,075 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 18 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-09-08 06:26:42,080 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:26:42,081 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 14 [2019-09-08 06:26:42,081 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-08 06:26:42,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-08 06:26:42,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-09-08 06:26:42,083 INFO L87 Difference]: Start difference. First operand 60 states and 90 transitions. Second operand 14 states. [2019-09-08 06:26:42,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:26:42,757 INFO L93 Difference]: Finished difference Result 159 states and 290 transitions. [2019-09-08 06:26:42,758 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-08 06:26:42,758 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 55 [2019-09-08 06:26:42,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:26:42,762 INFO L225 Difference]: With dead ends: 159 [2019-09-08 06:26:42,763 INFO L226 Difference]: Without dead ends: 99 [2019-09-08 06:26:42,765 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2019-09-08 06:26:42,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-09-08 06:26:42,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 79. [2019-09-08 06:26:42,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-09-08 06:26:42,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 120 transitions. [2019-09-08 06:26:42,808 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 120 transitions. Word has length 55 [2019-09-08 06:26:42,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:26:42,811 INFO L475 AbstractCegarLoop]: Abstraction has 79 states and 120 transitions. [2019-09-08 06:26:42,812 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-08 06:26:42,812 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 120 transitions. [2019-09-08 06:26:42,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-09-08 06:26:42,814 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:26:42,814 INFO L399 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:26:42,816 INFO L418 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:26:42,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:26:42,816 INFO L82 PathProgramCache]: Analyzing trace with hash -908952008, now seen corresponding path program 2 times [2019-09-08 06:26:42,817 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:26:42,817 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:26:42,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:26:42,822 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:26:42,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:26:42,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:26:43,053 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 29 proven. 59 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2019-09-08 06:26:43,054 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:26:43,054 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 06:26:43,068 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 06:26:43,101 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 06:26:43,102 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:26:43,103 INFO L256 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 9 conjunts are in the unsatisfiable core [2019-09-08 06:26:43,115 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:26:43,230 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 44 proven. 17 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-09-08 06:26:43,236 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:26:43,237 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 18 [2019-09-08 06:26:43,237 INFO L454 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-09-08 06:26:43,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-09-08 06:26:43,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2019-09-08 06:26:43,239 INFO L87 Difference]: Start difference. First operand 79 states and 120 transitions. Second operand 18 states. [2019-09-08 06:26:44,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:26:44,002 INFO L93 Difference]: Finished difference Result 184 states and 321 transitions. [2019-09-08 06:26:44,002 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-09-08 06:26:44,003 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 82 [2019-09-08 06:26:44,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:26:44,005 INFO L225 Difference]: With dead ends: 184 [2019-09-08 06:26:44,006 INFO L226 Difference]: Without dead ends: 99 [2019-09-08 06:26:44,008 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=165, Invalid=765, Unknown=0, NotChecked=0, Total=930 [2019-09-08 06:26:44,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-09-08 06:26:44,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 84. [2019-09-08 06:26:44,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-09-08 06:26:44,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 118 transitions. [2019-09-08 06:26:44,023 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 118 transitions. Word has length 82 [2019-09-08 06:26:44,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:26:44,024 INFO L475 AbstractCegarLoop]: Abstraction has 84 states and 118 transitions. [2019-09-08 06:26:44,024 INFO L476 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-09-08 06:26:44,024 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 118 transitions. [2019-09-08 06:26:44,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-09-08 06:26:44,026 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:26:44,026 INFO L399 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:26:44,027 INFO L418 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:26:44,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:26:44,027 INFO L82 PathProgramCache]: Analyzing trace with hash -1156896337, now seen corresponding path program 1 times [2019-09-08 06:26:44,027 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:26:44,028 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:26:44,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:26:44,029 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:26:44,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:26:44,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-09-08 06:26:44,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-09-08 06:26:44,130 INFO L466 BasicCegarLoop]: Counterexample might be feasible [2019-09-08 06:26:44,180 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 08.09 06:26:44 BoogieIcfgContainer [2019-09-08 06:26:44,181 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-08 06:26:44,183 INFO L168 Benchmark]: Toolchain (without parser) took 7096.18 ms. Allocated memory was 138.9 MB in the beginning and 313.0 MB in the end (delta: 174.1 MB). Free memory was 86.1 MB in the beginning and 236.0 MB in the end (delta: -149.9 MB). Peak memory consumption was 24.2 MB. Max. memory is 7.1 GB. [2019-09-08 06:26:44,184 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 138.9 MB. Free memory was 105.1 MB in the beginning and 104.9 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-08 06:26:44,185 INFO L168 Benchmark]: CACSL2BoogieTranslator took 304.76 ms. Allocated memory is still 138.9 MB. Free memory was 85.9 MB in the beginning and 76.6 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2019-09-08 06:26:44,186 INFO L168 Benchmark]: Boogie Preprocessor took 165.39 ms. Allocated memory was 138.9 MB in the beginning and 199.2 MB in the end (delta: 60.3 MB). Free memory was 76.6 MB in the beginning and 176.8 MB in the end (delta: -100.1 MB). Peak memory consumption was 11.4 MB. Max. memory is 7.1 GB. [2019-09-08 06:26:44,186 INFO L168 Benchmark]: RCFGBuilder took 306.93 ms. Allocated memory is still 199.2 MB. Free memory was 176.8 MB in the beginning and 164.2 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. [2019-09-08 06:26:44,188 INFO L168 Benchmark]: TraceAbstraction took 6313.88 ms. Allocated memory was 199.2 MB in the beginning and 313.0 MB in the end (delta: 113.8 MB). Free memory was 164.2 MB in the beginning and 236.0 MB in the end (delta: -71.8 MB). Peak memory consumption was 42.0 MB. Max. memory is 7.1 GB. [2019-09-08 06:26:44,192 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 138.9 MB. Free memory was 105.1 MB in the beginning and 104.9 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 304.76 ms. Allocated memory is still 138.9 MB. Free memory was 85.9 MB in the beginning and 76.6 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 165.39 ms. Allocated memory was 138.9 MB in the beginning and 199.2 MB in the end (delta: 60.3 MB). Free memory was 76.6 MB in the beginning and 176.8 MB in the end (delta: -100.1 MB). Peak memory consumption was 11.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 306.93 ms. Allocated memory is still 199.2 MB. Free memory was 176.8 MB in the beginning and 164.2 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6313.88 ms. Allocated memory was 199.2 MB in the beginning and 313.0 MB in the end (delta: 113.8 MB). Free memory was 164.2 MB in the beginning and 236.0 MB in the end (delta: -71.8 MB). Peak memory consumption was 42.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 39]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L36] int x = 4; VAL [x=4] [L37] CALL, EXPR fibo1(x) VAL [\old(n)=4] [L8] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L10] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=3] [L18] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L20] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=2] [L8] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L10] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L18] COND TRUE n < 1 [L19] return 0; VAL [\old(n)=0, \result=0, n=0] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=3, fibo1(n-1)=1, n=3] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=3, fibo1(n-1)=1, fibo1(n-2)=1, n=3] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=4, fibo2(n-1)=2, n=4] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=2] [L18] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L20] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=2, fibo1(n-1)=1, n=2] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L8] COND TRUE n < 1 [L9] return 0; VAL [\old(n)=0, \result=0, n=0] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=4, fibo2(n-1)=2, fibo2(n-2)=1, n=4] [L13] return fibo2(n-1) + fibo2(n-2); [L37] RET, EXPR fibo1(x) VAL [fibo1(x)=3, x=4] [L37] int result = fibo1(x); [L38] COND TRUE result == 3 VAL [result=3, x=4] [L39] __VERIFIER_error() VAL [result=3, x=4] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. UNSAFE Result, 6.2s OverallTime, 10 OverallIterations, 6 TraceHistogramMax, 3.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 248 SDtfs, 319 SDslu, 1304 SDs, 0 SdLazy, 1638 SolverSat, 266 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 460 GetRequests, 333 SyntacticMatches, 3 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 1.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=84occurred 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, 9 MinimizatonAttempts, 71 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 741 NumberOfCodeBlocks, 741 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 657 ConstructedInterpolants, 0 QuantifiedInterpolants, 63123 SizeOfPredicates, 25 NumberOfNonLiveVariables, 732 ConjunctsInSsa, 51 ConjunctsInUnsatCore, 16 InterpolantComputations, 2 PerfectInterpolantSequences, 370/526 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...