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_20-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-08 06:13:01,893 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-08 06:13:01,895 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-08 06:13:01,906 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-08 06:13:01,907 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-08 06:13:01,907 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-08 06:13:01,909 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-08 06:13:01,910 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-08 06:13:01,912 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-08 06:13:01,913 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-08 06:13:01,914 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-08 06:13:01,915 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-08 06:13:01,915 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-08 06:13:01,916 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-08 06:13:01,917 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-08 06:13:01,918 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-08 06:13:01,919 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-08 06:13:01,920 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-08 06:13:01,921 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-08 06:13:01,923 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-08 06:13:01,924 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-08 06:13:01,925 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-08 06:13:01,926 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-08 06:13:01,927 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-08 06:13:01,929 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-08 06:13:01,936 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-08 06:13:01,937 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-08 06:13:01,938 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-08 06:13:01,939 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 06:13:01,952 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-08 06:13:01,953 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-08 06:13:01,954 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-08 06:13:01,954 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-08 06:13:01,954 INFO L138 SettingsManager]: * Use SBE=true [2019-09-08 06:13:01,955 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-08 06:13:01,955 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-08 06:13:01,955 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-08 06:13:01,955 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-08 06:13:01,955 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-08 06:13:01,956 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-08 06:13:01,956 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-08 06:13:01,956 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-08 06:13:01,956 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-08 06:13:01,956 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-08 06:13:01,957 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-08 06:13:01,957 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-08 06:13:01,957 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-08 06:13:01,957 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-08 06:13:01,957 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-08 06:13:01,958 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-08 06:13:01,958 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-08 06:13:01,958 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-08 06:13:01,958 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-08 06:13:01,959 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-08 06:13:01,959 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-08 06:13:01,959 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-08 06:13:01,959 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-08 06:13:01,959 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-08 06:13:01,986 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-08 06:13:01,998 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-08 06:13:02,002 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-08 06:13:02,003 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-08 06:13:02,003 INFO L275 PluginConnector]: CDTParser initialized [2019-09-08 06:13:02,004 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_20-1.c [2019-09-08 06:13:02,062 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/46d10c6d1/21c57d7454044a2fb403221e3a5cb9f8/FLAG6b6ba9753 [2019-09-08 06:13:02,468 INFO L306 CDTParser]: Found 1 translation units. [2019-09-08 06:13:02,471 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_20-1.c [2019-09-08 06:13:02,477 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/46d10c6d1/21c57d7454044a2fb403221e3a5cb9f8/FLAG6b6ba9753 [2019-09-08 06:13:02,889 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/46d10c6d1/21c57d7454044a2fb403221e3a5cb9f8 [2019-09-08 06:13:02,901 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-08 06:13:02,903 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-08 06:13:02,904 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-08 06:13:02,905 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-08 06:13:02,908 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-08 06:13:02,909 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.09 06:13:02" (1/1) ... [2019-09-08 06:13:02,912 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22725a14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:13:02, skipping insertion in model container [2019-09-08 06:13:02,912 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.09 06:13:02" (1/1) ... [2019-09-08 06:13:02,919 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-08 06:13:02,938 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-08 06:13:03,118 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-08 06:13:03,121 INFO L188 MainTranslator]: Completed pre-run [2019-09-08 06:13:03,134 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-08 06:13:03,145 INFO L192 MainTranslator]: Completed translation [2019-09-08 06:13:03,145 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:13:03 WrapperNode [2019-09-08 06:13:03,146 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-08 06:13:03,146 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-08 06:13:03,147 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-08 06:13:03,147 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-08 06:13:03,158 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:13:03" (1/1) ... [2019-09-08 06:13:03,158 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:13:03" (1/1) ... [2019-09-08 06:13:03,245 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:13:03" (1/1) ... [2019-09-08 06:13:03,246 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:13:03" (1/1) ... [2019-09-08 06:13:03,252 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:13:03" (1/1) ... [2019-09-08 06:13:03,260 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:13:03" (1/1) ... [2019-09-08 06:13:03,260 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:13:03" (1/1) ... [2019-09-08 06:13:03,262 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-08 06:13:03,262 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-08 06:13:03,262 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-08 06:13:03,262 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-08 06:13:03,263 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:13:03" (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 06:13:03,308 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-08 06:13:03,308 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-08 06:13:03,309 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2019-09-08 06:13:03,309 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-08 06:13:03,309 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-08 06:13:03,309 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-08 06:13:03,309 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2019-09-08 06:13:03,309 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-08 06:13:03,310 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-08 06:13:03,310 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-08 06:13:03,470 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-08 06:13:03,470 INFO L283 CfgBuilder]: Removed 0 assume(true) statements. [2019-09-08 06:13:03,472 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.09 06:13:03 BoogieIcfgContainer [2019-09-08 06:13:03,472 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-08 06:13:03,473 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-08 06:13:03,473 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-08 06:13:03,476 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-08 06:13:03,476 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.09 06:13:02" (1/3) ... [2019-09-08 06:13:03,477 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8ed5005 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.09 06:13:03, skipping insertion in model container [2019-09-08 06:13:03,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:13:03" (2/3) ... [2019-09-08 06:13:03,478 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8ed5005 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.09 06:13:03, skipping insertion in model container [2019-09-08 06:13:03,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.09 06:13:03" (3/3) ... [2019-09-08 06:13:03,479 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_20-1.c [2019-09-08 06:13:03,489 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-08 06:13:03,496 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-08 06:13:03,514 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-08 06:13:03,570 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-08 06:13:03,571 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-08 06:13:03,571 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-08 06:13:03,571 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-08 06:13:03,571 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-08 06:13:03,571 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-08 06:13:03,572 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-08 06:13:03,572 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-08 06:13:03,572 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-08 06:13:03,592 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2019-09-08 06:13:03,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-09-08 06:13:03,600 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:13:03,601 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:13:03,603 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:13:03,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:13:03,608 INFO L82 PathProgramCache]: Analyzing trace with hash 537028541, now seen corresponding path program 1 times [2019-09-08 06:13:03,611 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:13:03,611 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:13:03,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:03,661 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:13:03,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:03,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:03,781 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 06:13:03,785 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-08 06:13:03,785 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-08 06:13:03,789 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-08 06:13:03,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-08 06:13:03,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-08 06:13:03,801 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2019-09-08 06:13:03,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:13:03,918 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2019-09-08 06:13:03,919 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-08 06:13:03,920 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2019-09-08 06:13:03,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:13:03,929 INFO L225 Difference]: With dead ends: 35 [2019-09-08 06:13:03,930 INFO L226 Difference]: Without dead ends: 21 [2019-09-08 06:13:03,933 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 06:13:03,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-09-08 06:13:03,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-09-08 06:13:03,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-09-08 06:13:03,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2019-09-08 06:13:03,977 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2019-09-08 06:13:03,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:13:03,978 INFO L475 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2019-09-08 06:13:03,978 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-08 06:13:03,978 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2019-09-08 06:13:03,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-09-08 06:13:03,980 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:13:03,980 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:13:03,980 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:13:03,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:13:03,981 INFO L82 PathProgramCache]: Analyzing trace with hash 179123823, now seen corresponding path program 1 times [2019-09-08 06:13:03,981 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:13:03,981 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:13:03,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:03,982 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:13:03,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:03,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:04,026 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 06:13:04,027 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-08 06:13:04,029 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-08 06:13:04,030 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-08 06:13:04,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-08 06:13:04,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-08 06:13:04,031 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 5 states. [2019-09-08 06:13:04,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:13:04,057 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2019-09-08 06:13:04,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-08 06:13:04,058 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2019-09-08 06:13:04,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:13:04,059 INFO L225 Difference]: With dead ends: 27 [2019-09-08 06:13:04,059 INFO L226 Difference]: Without dead ends: 23 [2019-09-08 06:13:04,060 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-08 06:13:04,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-09-08 06:13:04,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2019-09-08 06:13:04,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-09-08 06:13:04,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2019-09-08 06:13:04,069 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14 [2019-09-08 06:13:04,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:13:04,070 INFO L475 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2019-09-08 06:13:04,070 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-08 06:13:04,070 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2019-09-08 06:13:04,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-09-08 06:13:04,072 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:13:04,072 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:13:04,073 INFO L418 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:13:04,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:13:04,073 INFO L82 PathProgramCache]: Analyzing trace with hash 806022394, now seen corresponding path program 1 times [2019-09-08 06:13:04,073 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:13:04,073 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:13:04,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:04,074 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:13:04,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:04,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:04,181 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-08 06:13:04,181 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:13:04,182 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 06:13:04,199 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:13:04,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:04,224 INFO L256 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-08 06:13:04,231 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:13:04,315 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-08 06:13:04,322 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:13:04,323 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2019-09-08 06:13:04,323 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-08 06:13:04,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-08 06:13:04,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-09-08 06:13:04,325 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 8 states. [2019-09-08 06:13:04,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:13:04,453 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2019-09-08 06:13:04,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-08 06:13:04,455 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2019-09-08 06:13:04,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:13:04,457 INFO L225 Difference]: With dead ends: 38 [2019-09-08 06:13:04,458 INFO L226 Difference]: Without dead ends: 23 [2019-09-08 06:13:04,461 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-09-08 06:13:04,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-09-08 06:13:04,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-09-08 06:13:04,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-09-08 06:13:04,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2019-09-08 06:13:04,474 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 26 [2019-09-08 06:13:04,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:13:04,475 INFO L475 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2019-09-08 06:13:04,475 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-08 06:13:04,475 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2019-09-08 06:13:04,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-09-08 06:13:04,477 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:13:04,479 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:13:04,479 INFO L418 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:13:04,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:13:04,480 INFO L82 PathProgramCache]: Analyzing trace with hash -983862936, now seen corresponding path program 1 times [2019-09-08 06:13:04,481 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:13:04,481 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:13:04,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:04,483 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:13:04,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:04,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:04,555 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-09-08 06:13:04,555 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:13:04,555 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 06:13:04,570 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:13:04,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:04,588 INFO L256 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-08 06:13:04,591 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:13:04,606 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 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 06:13:04,615 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:13:04,615 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2019-09-08 06:13:04,615 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-08 06:13:04,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-08 06:13:04,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-09-08 06:13:04,616 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 6 states. [2019-09-08 06:13:04,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:13:04,695 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2019-09-08 06:13:04,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-08 06:13:04,695 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2019-09-08 06:13:04,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:13:04,698 INFO L225 Difference]: With dead ends: 32 [2019-09-08 06:13:04,698 INFO L226 Difference]: Without dead ends: 28 [2019-09-08 06:13:04,698 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-09-08 06:13:04,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-09-08 06:13:04,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-09-08 06:13:04,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-09-08 06:13:04,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2019-09-08 06:13:04,709 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 27 [2019-09-08 06:13:04,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:13:04,709 INFO L475 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2019-09-08 06:13:04,709 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-08 06:13:04,710 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2019-09-08 06:13:04,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-09-08 06:13:04,713 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:13:04,713 INFO L399 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:13:04,713 INFO L418 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:13:04,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:13:04,714 INFO L82 PathProgramCache]: Analyzing trace with hash 146085807, now seen corresponding path program 2 times [2019-09-08 06:13:04,714 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:13:04,715 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:13:04,717 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:04,717 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:13:04,717 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:04,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:04,905 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 23 proven. 8 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-09-08 06:13:04,906 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:13:04,906 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 06:13:04,925 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 06:13:04,945 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 06:13:04,945 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:13:04,946 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-08 06:13:04,949 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:13:05,007 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-09-08 06:13:05,011 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:13:05,011 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2019-09-08 06:13:05,012 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-08 06:13:05,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-08 06:13:05,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2019-09-08 06:13:05,013 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand 13 states. [2019-09-08 06:13:05,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:13:05,382 INFO L93 Difference]: Finished difference Result 66 states and 99 transitions. [2019-09-08 06:13:05,383 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-08 06:13:05,383 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 40 [2019-09-08 06:13:05,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:13:05,385 INFO L225 Difference]: With dead ends: 66 [2019-09-08 06:13:05,385 INFO L226 Difference]: Without dead ends: 44 [2019-09-08 06:13:05,388 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2019-09-08 06:13:05,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-09-08 06:13:05,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2019-09-08 06:13:05,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-09-08 06:13:05,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 51 transitions. [2019-09-08 06:13:05,409 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 51 transitions. Word has length 40 [2019-09-08 06:13:05,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:13:05,410 INFO L475 AbstractCegarLoop]: Abstraction has 42 states and 51 transitions. [2019-09-08 06:13:05,410 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-08 06:13:05,411 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 51 transitions. [2019-09-08 06:13:05,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-09-08 06:13:05,415 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:13:05,415 INFO L399 BasicCegarLoop]: trace histogram [9, 9, 7, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:13:05,418 INFO L418 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:13:05,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:13:05,418 INFO L82 PathProgramCache]: Analyzing trace with hash 2001184551, now seen corresponding path program 3 times [2019-09-08 06:13:05,418 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:13:05,419 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:13:05,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:05,420 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:13:05,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:05,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:05,548 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 66 proven. 25 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2019-09-08 06:13:05,549 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:13:05,549 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 06:13:05,565 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 06:13:05,595 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-09-08 06:13:05,595 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:13:05,598 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-08 06:13:05,602 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:13:05,618 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 66 proven. 25 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2019-09-08 06:13:05,627 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:13:05,627 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2019-09-08 06:13:05,628 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-08 06:13:05,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-08 06:13:05,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-09-08 06:13:05,629 INFO L87 Difference]: Start difference. First operand 42 states and 51 transitions. Second operand 7 states. [2019-09-08 06:13:05,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:13:05,717 INFO L93 Difference]: Finished difference Result 49 states and 59 transitions. [2019-09-08 06:13:05,717 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-08 06:13:05,717 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 68 [2019-09-08 06:13:05,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:13:05,720 INFO L225 Difference]: With dead ends: 49 [2019-09-08 06:13:05,721 INFO L226 Difference]: Without dead ends: 45 [2019-09-08 06:13:05,721 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-09-08 06:13:05,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-09-08 06:13:05,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2019-09-08 06:13:05,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-09-08 06:13:05,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 51 transitions. [2019-09-08 06:13:05,731 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 51 transitions. Word has length 68 [2019-09-08 06:13:05,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:13:05,732 INFO L475 AbstractCegarLoop]: Abstraction has 42 states and 51 transitions. [2019-09-08 06:13:05,732 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-08 06:13:05,732 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 51 transitions. [2019-09-08 06:13:05,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-09-08 06:13:05,734 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:13:05,734 INFO L399 BasicCegarLoop]: trace histogram [13, 13, 11, 6, 6, 6, 6, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:13:05,735 INFO L418 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:13:05,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:13:05,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1474757101, now seen corresponding path program 4 times [2019-09-08 06:13:05,735 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:13:05,735 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:13:05,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:05,737 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:13:05,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:05,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:05,844 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 46 proven. 109 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2019-09-08 06:13:05,845 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:13:05,845 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 06:13:05,862 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 06:13:05,891 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 06:13:05,891 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:13:05,892 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 13 conjunts are in the unsatisfiable core [2019-09-08 06:13:05,897 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:13:05,989 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 93 proven. 162 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (6)] Exception during sending of exit command (exit): Broken pipe [2019-09-08 06:13:05,993 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:13:05,993 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11] total 13 [2019-09-08 06:13:05,994 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-08 06:13:05,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-08 06:13:05,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2019-09-08 06:13:05,995 INFO L87 Difference]: Start difference. First operand 42 states and 51 transitions. Second operand 13 states. [2019-09-08 06:13:06,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:13:06,355 INFO L93 Difference]: Finished difference Result 93 states and 141 transitions. [2019-09-08 06:13:06,356 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-09-08 06:13:06,356 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 96 [2019-09-08 06:13:06,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:13:06,358 INFO L225 Difference]: With dead ends: 93 [2019-09-08 06:13:06,361 INFO L226 Difference]: Without dead ends: 57 [2019-09-08 06:13:06,363 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=403, Unknown=0, NotChecked=0, Total=552 [2019-09-08 06:13:06,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-09-08 06:13:06,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2019-09-08 06:13:06,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-09-08 06:13:06,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 70 transitions. [2019-09-08 06:13:06,384 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 70 transitions. Word has length 96 [2019-09-08 06:13:06,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:13:06,384 INFO L475 AbstractCegarLoop]: Abstraction has 54 states and 70 transitions. [2019-09-08 06:13:06,385 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-08 06:13:06,385 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 70 transitions. [2019-09-08 06:13:06,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-09-08 06:13:06,394 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:13:06,394 INFO L399 BasicCegarLoop]: trace histogram [19, 19, 15, 9, 9, 9, 9, 9, 9, 9, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:13:06,394 INFO L418 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:13:06,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:13:06,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1040445716, now seen corresponding path program 5 times [2019-09-08 06:13:06,397 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:13:06,397 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:13:06,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:06,399 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:13:06,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:06,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:06,535 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 106 proven. 211 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2019-09-08 06:13:06,535 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:13:06,535 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) [2019-09-08 06:13:06,552 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:13:06,596 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2019-09-08 06:13:06,597 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:13:06,597 INFO L256 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 16 conjunts are in the unsatisfiable core [2019-09-08 06:13:06,604 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:13:06,758 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 187 proven. 336 refuted. 0 times theorem prover too weak. 410 trivial. 0 not checked. [2019-09-08 06:13:06,770 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:13:06,770 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12] total 14 [2019-09-08 06:13:06,774 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-08 06:13:06,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-08 06:13:06,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2019-09-08 06:13:06,776 INFO L87 Difference]: Start difference. First operand 54 states and 70 transitions. Second operand 14 states. [2019-09-08 06:13:07,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:13:07,260 INFO L93 Difference]: Finished difference Result 118 states and 193 transitions. [2019-09-08 06:13:07,261 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-09-08 06:13:07,261 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 136 [2019-09-08 06:13:07,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:13:07,263 INFO L225 Difference]: With dead ends: 118 [2019-09-08 06:13:07,264 INFO L226 Difference]: Without dead ends: 73 [2019-09-08 06:13:07,268 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2019-09-08 06:13:07,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-09-08 06:13:07,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 68. [2019-09-08 06:13:07,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-09-08 06:13:07,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 91 transitions. [2019-09-08 06:13:07,286 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 91 transitions. Word has length 136 [2019-09-08 06:13:07,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:13:07,287 INFO L475 AbstractCegarLoop]: Abstraction has 68 states and 91 transitions. [2019-09-08 06:13:07,287 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-08 06:13:07,287 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 91 transitions. [2019-09-08 06:13:07,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2019-09-08 06:13:07,290 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:13:07,290 INFO L399 BasicCegarLoop]: trace histogram [29, 29, 23, 14, 14, 14, 14, 14, 14, 14, 9, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:13:07,290 INFO L418 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:13:07,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:13:07,291 INFO L82 PathProgramCache]: Analyzing trace with hash -509498553, now seen corresponding path program 6 times [2019-09-08 06:13:07,291 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:13:07,291 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:13:07,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:07,292 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:13:07,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:07,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:07,484 INFO L134 CoverageAnalysis]: Checked inductivity of 2241 backedges. 162 proven. 486 refuted. 0 times theorem prover too weak. 1593 trivial. 0 not checked. [2019-09-08 06:13:07,485 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:13:07,485 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 06:13:07,509 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-08 06:13:07,575 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2019-09-08 06:13:07,575 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:13:07,576 INFO L256 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 12 conjunts are in the unsatisfiable core [2019-09-08 06:13:07,589 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:13:07,653 INFO L134 CoverageAnalysis]: Checked inductivity of 2241 backedges. 236 proven. 396 refuted. 0 times theorem prover too weak. 1609 trivial. 0 not checked. [2019-09-08 06:13:07,665 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:13:07,666 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2019-09-08 06:13:07,666 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-08 06:13:07,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-08 06:13:07,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2019-09-08 06:13:07,667 INFO L87 Difference]: Start difference. First operand 68 states and 91 transitions. Second operand 11 states. [2019-09-08 06:13:07,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:13:07,799 INFO L93 Difference]: Finished difference Result 77 states and 109 transitions. [2019-09-08 06:13:07,800 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-08 06:13:07,800 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 204 [2019-09-08 06:13:07,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:13:07,803 INFO L225 Difference]: With dead ends: 77 [2019-09-08 06:13:07,803 INFO L226 Difference]: Without dead ends: 73 [2019-09-08 06:13:07,804 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2019-09-08 06:13:07,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-09-08 06:13:07,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2019-09-08 06:13:07,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-09-08 06:13:07,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 103 transitions. [2019-09-08 06:13:07,815 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 103 transitions. Word has length 204 [2019-09-08 06:13:07,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:13:07,815 INFO L475 AbstractCegarLoop]: Abstraction has 73 states and 103 transitions. [2019-09-08 06:13:07,815 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-08 06:13:07,815 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 103 transitions. [2019-09-08 06:13:07,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2019-09-08 06:13:07,820 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:13:07,820 INFO L399 BasicCegarLoop]: trace histogram [45, 45, 36, 22, 22, 22, 22, 22, 22, 22, 14, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:13:07,821 INFO L418 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:13:07,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:13:07,821 INFO L82 PathProgramCache]: Analyzing trace with hash 96725317, now seen corresponding path program 7 times [2019-09-08 06:13:07,821 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:13:07,821 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:13:07,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:07,822 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:13:07,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:07,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:08,063 INFO L134 CoverageAnalysis]: Checked inductivity of 5514 backedges. 213 proven. 1259 refuted. 0 times theorem prover too weak. 4042 trivial. 0 not checked. [2019-09-08 06:13:08,063 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:13:08,067 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) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:13:08,085 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:13:08,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:08,175 INFO L256 TraceCheckSpWp]: Trace formula consists of 697 conjuncts, 16 conjunts are in the unsatisfiable core [2019-09-08 06:13:08,182 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:13:08,238 INFO L134 CoverageAnalysis]: Checked inductivity of 5514 backedges. 213 proven. 1259 refuted. 0 times theorem prover too weak. 4042 trivial. 0 not checked. [2019-09-08 06:13:08,241 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:13:08,242 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2019-09-08 06:13:08,242 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-08 06:13:08,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-08 06:13:08,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2019-09-08 06:13:08,243 INFO L87 Difference]: Start difference. First operand 73 states and 103 transitions. Second operand 11 states. [2019-09-08 06:13:08,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:13:08,458 INFO L93 Difference]: Finished difference Result 82 states and 123 transitions. [2019-09-08 06:13:08,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-08 06:13:08,458 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 313 [2019-09-08 06:13:08,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:13:08,465 INFO L225 Difference]: With dead ends: 82 [2019-09-08 06:13:08,465 INFO L226 Difference]: Without dead ends: 78 [2019-09-08 06:13:08,465 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2019-09-08 06:13:08,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-09-08 06:13:08,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2019-09-08 06:13:08,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-09-08 06:13:08,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 117 transitions. [2019-09-08 06:13:08,488 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 117 transitions. Word has length 313 [2019-09-08 06:13:08,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:13:08,491 INFO L475 AbstractCegarLoop]: Abstraction has 78 states and 117 transitions. [2019-09-08 06:13:08,491 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-08 06:13:08,491 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 117 transitions. [2019-09-08 06:13:08,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 655 [2019-09-08 06:13:08,509 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:13:08,509 INFO L399 BasicCegarLoop]: trace histogram [95, 95, 77, 47, 47, 47, 47, 47, 47, 47, 30, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:13:08,510 INFO L418 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:13:08,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:13:08,510 INFO L82 PathProgramCache]: Analyzing trace with hash -532032268, now seen corresponding path program 8 times [2019-09-08 06:13:08,510 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:13:08,511 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:13:08,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:08,512 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:13:08,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:08,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:09,108 INFO L134 CoverageAnalysis]: Checked inductivity of 25110 backedges. 529 proven. 3350 refuted. 0 times theorem prover too weak. 21231 trivial. 0 not checked. [2019-09-08 06:13:09,109 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:13:09,109 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) [2019-09-08 06:13:09,138 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:13:09,315 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 06:13:09,315 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:13:09,318 INFO L256 TraceCheckSpWp]: Trace formula consists of 1454 conjuncts, 18 conjunts are in the unsatisfiable core [2019-09-08 06:13:09,342 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:13:09,578 INFO L134 CoverageAnalysis]: Checked inductivity of 25110 backedges. 529 proven. 3350 refuted. 0 times theorem prover too weak. 21231 trivial. 0 not checked. [2019-09-08 06:13:09,582 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:13:09,583 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2019-09-08 06:13:09,583 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-08 06:13:09,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-08 06:13:09,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2019-09-08 06:13:09,584 INFO L87 Difference]: Start difference. First operand 78 states and 117 transitions. Second operand 12 states. [2019-09-08 06:13:09,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:13:09,844 INFO L93 Difference]: Finished difference Result 87 states and 139 transitions. [2019-09-08 06:13:09,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-09-08 06:13:09,844 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 654 [2019-09-08 06:13:09,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:13:09,848 INFO L225 Difference]: With dead ends: 87 [2019-09-08 06:13:09,848 INFO L226 Difference]: Without dead ends: 83 [2019-09-08 06:13:09,849 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 680 GetRequests, 662 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2019-09-08 06:13:09,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-09-08 06:13:09,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2019-09-08 06:13:09,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-09-08 06:13:09,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 133 transitions. [2019-09-08 06:13:09,861 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 133 transitions. Word has length 654 [2019-09-08 06:13:09,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:13:09,862 INFO L475 AbstractCegarLoop]: Abstraction has 83 states and 133 transitions. [2019-09-08 06:13:09,862 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-08 06:13:09,862 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 133 transitions. [2019-09-08 06:13:09,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1009 [2019-09-08 06:13:09,871 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:13:09,872 INFO L399 BasicCegarLoop]: trace histogram [147, 147, 119, 73, 73, 73, 73, 73, 73, 73, 46, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:13:09,872 INFO L418 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:13:09,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:13:09,873 INFO L82 PathProgramCache]: Analyzing trace with hash -70129236, now seen corresponding path program 9 times [2019-09-08 06:13:09,873 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:13:09,873 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:13:09,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:09,874 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:13:09,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:10,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:10,597 INFO L134 CoverageAnalysis]: Checked inductivity of 60457 backedges. 840 proven. 5351 refuted. 0 times theorem prover too weak. 54266 trivial. 0 not checked. [2019-09-08 06:13:10,597 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:13:10,598 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:13:10,615 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 06:13:10,787 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2019-09-08 06:13:10,788 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:13:10,790 INFO L256 TraceCheckSpWp]: Trace formula consists of 760 conjuncts, 20 conjunts are in the unsatisfiable core [2019-09-08 06:13:10,804 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:13:11,246 INFO L134 CoverageAnalysis]: Checked inductivity of 60457 backedges. 796 proven. 6156 refuted. 0 times theorem prover too weak. 53505 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (11)] Exception during sending of exit command (exit): Broken pipe [2019-09-08 06:13:11,250 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:13:11,251 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2019-09-08 06:13:11,252 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-08 06:13:11,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-08 06:13:11,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2019-09-08 06:13:11,253 INFO L87 Difference]: Start difference. First operand 83 states and 133 transitions. Second operand 13 states. [2019-09-08 06:13:11,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:13:11,524 INFO L93 Difference]: Finished difference Result 92 states and 157 transitions. [2019-09-08 06:13:11,524 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-08 06:13:11,524 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 1008 [2019-09-08 06:13:11,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:13:11,529 INFO L225 Difference]: With dead ends: 92 [2019-09-08 06:13:11,529 INFO L226 Difference]: Without dead ends: 88 [2019-09-08 06:13:11,529 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 1035 GetRequests, 1015 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2019-09-08 06:13:11,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2019-09-08 06:13:11,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2019-09-08 06:13:11,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-09-08 06:13:11,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 151 transitions. [2019-09-08 06:13:11,542 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 151 transitions. Word has length 1008 [2019-09-08 06:13:11,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:13:11,543 INFO L475 AbstractCegarLoop]: Abstraction has 88 states and 151 transitions. [2019-09-08 06:13:11,543 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-08 06:13:11,543 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 151 transitions. [2019-09-08 06:13:11,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1486 [2019-09-08 06:13:11,560 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:13:11,561 INFO L399 BasicCegarLoop]: trace histogram [217, 217, 176, 108, 108, 108, 108, 108, 108, 108, 68, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:13:11,561 INFO L418 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:13:11,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:13:11,562 INFO L82 PathProgramCache]: Analyzing trace with hash 528362143, now seen corresponding path program 10 times [2019-09-08 06:13:11,562 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:13:11,562 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:13:11,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:11,563 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:13:11,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:11,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:12,901 INFO L134 CoverageAnalysis]: Checked inductivity of 132256 backedges. 1425 proven. 10207 refuted. 0 times theorem prover too weak. 120624 trivial. 0 not checked. [2019-09-08 06:13:12,901 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:13:12,902 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:13:12,913 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 06:13:13,247 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 06:13:13,247 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:13:13,252 INFO L256 TraceCheckSpWp]: Trace formula consists of 2643 conjuncts, 25 conjunts are in the unsatisfiable core [2019-09-08 06:13:13,274 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:13:14,196 INFO L134 CoverageAnalysis]: Checked inductivity of 132256 backedges. 46778 proven. 1554 refuted. 0 times theorem prover too weak. 83924 trivial. 0 not checked. [2019-09-08 06:13:14,201 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:13:14,201 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 22 [2019-09-08 06:13:14,203 INFO L454 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-09-08 06:13:14,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-09-08 06:13:14,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2019-09-08 06:13:14,204 INFO L87 Difference]: Start difference. First operand 88 states and 151 transitions. Second operand 22 states. [2019-09-08 06:13:16,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:13:16,049 INFO L93 Difference]: Finished difference Result 251 states and 664 transitions. [2019-09-08 06:13:16,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2019-09-08 06:13:16,050 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 1485 [2019-09-08 06:13:16,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:13:16,054 INFO L225 Difference]: With dead ends: 251 [2019-09-08 06:13:16,054 INFO L226 Difference]: Without dead ends: 177 [2019-09-08 06:13:16,059 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 1560 GetRequests, 1487 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1573 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1166, Invalid=4384, Unknown=0, NotChecked=0, Total=5550 [2019-09-08 06:13:16,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2019-09-08 06:13:16,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 164. [2019-09-08 06:13:16,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2019-09-08 06:13:16,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 270 transitions. [2019-09-08 06:13:16,091 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 270 transitions. Word has length 1485 [2019-09-08 06:13:16,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:13:16,092 INFO L475 AbstractCegarLoop]: Abstraction has 164 states and 270 transitions. [2019-09-08 06:13:16,092 INFO L476 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-09-08 06:13:16,092 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 270 transitions. [2019-09-08 06:13:16,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1962 [2019-09-08 06:13:16,122 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:13:16,123 INFO L399 BasicCegarLoop]: trace histogram [287, 287, 232, 143, 143, 143, 143, 143, 143, 143, 89, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:13:16,124 INFO L418 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:13:16,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:13:16,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1868832152, now seen corresponding path program 11 times [2019-09-08 06:13:16,125 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:13:16,125 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:13:16,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:16,127 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:13:16,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:16,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:18,729 INFO L134 CoverageAnalysis]: Checked inductivity of 231572 backedges. 2007 proven. 15097 refuted. 0 times theorem prover too weak. 214468 trivial. 0 not checked. [2019-09-08 06:13:18,729 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:13:18,729 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:13:18,740 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-08 06:13:21,022 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 248 check-sat command(s) [2019-09-08 06:13:21,022 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:13:21,030 INFO L256 TraceCheckSpWp]: Trace formula consists of 4356 conjuncts, 22 conjunts are in the unsatisfiable core [2019-09-08 06:13:21,058 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:13:22,858 INFO L134 CoverageAnalysis]: Checked inductivity of 231572 backedges. 10405 proven. 5147 refuted. 0 times theorem prover too weak. 216020 trivial. 0 not checked. [2019-09-08 06:13:22,866 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:13:22,866 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2019-09-08 06:13:22,868 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-08 06:13:22,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-08 06:13:22,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2019-09-08 06:13:22,868 INFO L87 Difference]: Start difference. First operand 164 states and 270 transitions. Second operand 15 states. [2019-09-08 06:13:23,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:13:23,133 INFO L93 Difference]: Finished difference Result 173 states and 293 transitions. [2019-09-08 06:13:23,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-09-08 06:13:23,134 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 1961 [2019-09-08 06:13:23,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:13:23,140 INFO L225 Difference]: With dead ends: 173 [2019-09-08 06:13:23,140 INFO L226 Difference]: Without dead ends: 169 [2019-09-08 06:13:23,141 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 1996 GetRequests, 1972 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=236, Invalid=414, Unknown=0, NotChecked=0, Total=650 [2019-09-08 06:13:23,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2019-09-08 06:13:23,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2019-09-08 06:13:23,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2019-09-08 06:13:23,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 287 transitions. [2019-09-08 06:13:23,157 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 287 transitions. Word has length 1961 [2019-09-08 06:13:23,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:13:23,158 INFO L475 AbstractCegarLoop]: Abstraction has 169 states and 287 transitions. [2019-09-08 06:13:23,159 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-08 06:13:23,159 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 287 transitions. [2019-09-08 06:13:23,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4495 [2019-09-08 06:13:23,293 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:13:23,295 INFO L399 BasicCegarLoop]: trace histogram [659, 659, 533, 329, 329, 329, 329, 329, 329, 329, 204, 126, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:13:23,295 INFO L418 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:13:23,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:13:23,297 INFO L82 PathProgramCache]: Analyzing trace with hash 600095486, now seen corresponding path program 12 times [2019-09-08 06:13:23,297 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:13:23,297 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:13:23,298 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:23,298 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:13:23,298 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:25,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:32,757 INFO L134 CoverageAnalysis]: Checked inductivity of 1224846 backedges. 4199 proven. 35932 refuted. 0 times theorem prover too weak. 1184715 trivial. 0 not checked. [2019-09-08 06:13:32,757 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:13:32,757 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:13:32,769 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-08 06:13:33,172 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 62 check-sat command(s) [2019-09-08 06:13:33,173 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:13:33,176 INFO L256 TraceCheckSpWp]: Trace formula consists of 1183 conjuncts, 22 conjunts are in the unsatisfiable core [2019-09-08 06:13:33,226 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:13:39,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1224846 backedges. 8016 proven. 28400 refuted. 0 times theorem prover too weak. 1188430 trivial. 0 not checked. [2019-09-08 06:13:39,212 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:13:39,213 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2019-09-08 06:13:39,216 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-08 06:13:39,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-08 06:13:39,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2019-09-08 06:13:39,217 INFO L87 Difference]: Start difference. First operand 169 states and 287 transitions. Second operand 16 states. [2019-09-08 06:13:39,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:13:39,533 INFO L93 Difference]: Finished difference Result 178 states and 312 transitions. [2019-09-08 06:13:39,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-08 06:13:39,534 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 4494 [2019-09-08 06:13:39,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:13:39,541 INFO L225 Difference]: With dead ends: 178 [2019-09-08 06:13:39,541 INFO L226 Difference]: Without dead ends: 174 [2019-09-08 06:13:39,546 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 4530 GetRequests, 4504 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=275, Invalid=481, Unknown=0, NotChecked=0, Total=756 [2019-09-08 06:13:39,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2019-09-08 06:13:39,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2019-09-08 06:13:39,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2019-09-08 06:13:39,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 306 transitions. [2019-09-08 06:13:39,564 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 306 transitions. Word has length 4494 [2019-09-08 06:13:39,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:13:39,565 INFO L475 AbstractCegarLoop]: Abstraction has 174 states and 306 transitions. [2019-09-08 06:13:39,565 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-08 06:13:39,566 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 306 transitions. [2019-09-08 06:13:39,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7273 [2019-09-08 06:13:39,824 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:13:39,827 INFO L399 BasicCegarLoop]: trace histogram [1067, 1067, 863, 533, 533, 533, 533, 533, 533, 533, 330, 204, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:13:39,827 INFO L418 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:13:39,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:13:39,829 INFO L82 PathProgramCache]: Analyzing trace with hash 55870124, now seen corresponding path program 13 times [2019-09-08 06:13:39,829 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:13:39,829 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:13:39,830 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:39,830 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:13:39,830 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:44,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:14:03,050 INFO L134 CoverageAnalysis]: Checked inductivity of 3213909 backedges. 7119 proven. 64338 refuted. 0 times theorem prover too weak. 3142452 trivial. 0 not checked. [2019-09-08 06:14:03,051 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:14:03,051 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:14:03,062 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:14:04,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:14:04,969 INFO L256 TraceCheckSpWp]: Trace formula consists of 16148 conjuncts, 28 conjunts are in the unsatisfiable core [2019-09-08 06:14:05,047 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:14:20,777 INFO L134 CoverageAnalysis]: Checked inductivity of 3213909 backedges. 6947 proven. 70571 refuted. 0 times theorem prover too weak. 3136391 trivial. 0 not checked. [2019-09-08 06:14:20,791 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:14:20,793 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 17 [2019-09-08 06:14:20,797 INFO L454 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-09-08 06:14:20,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-09-08 06:14:20,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2019-09-08 06:14:20,797 INFO L87 Difference]: Start difference. First operand 174 states and 306 transitions. Second operand 17 states. [2019-09-08 06:14:21,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:14:21,143 INFO L93 Difference]: Finished difference Result 183 states and 333 transitions. [2019-09-08 06:14:21,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-09-08 06:14:21,143 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 7272 [2019-09-08 06:14:21,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:14:21,152 INFO L225 Difference]: With dead ends: 183 [2019-09-08 06:14:21,153 INFO L226 Difference]: Without dead ends: 179 [2019-09-08 06:14:21,154 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 7311 GetRequests, 7283 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=317, Invalid=553, Unknown=0, NotChecked=0, Total=870 [2019-09-08 06:14:21,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2019-09-08 06:14:21,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2019-09-08 06:14:21,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2019-09-08 06:14:21,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 327 transitions. [2019-09-08 06:14:21,169 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 327 transitions. Word has length 7272 [2019-09-08 06:14:21,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:14:21,171 INFO L475 AbstractCegarLoop]: Abstraction has 179 states and 327 transitions. [2019-09-08 06:14:21,171 INFO L476 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-09-08 06:14:21,172 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 327 transitions. [2019-09-08 06:14:21,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11658 [2019-09-08 06:14:21,817 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:14:21,820 INFO L399 BasicCegarLoop]: trace histogram [1711, 1711, 1384, 855, 855, 855, 855, 855, 855, 855, 529, 327, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:14:21,821 INFO L418 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:14:21,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:14:21,823 INFO L82 PathProgramCache]: Analyzing trace with hash -1264705540, now seen corresponding path program 14 times [2019-09-08 06:14:21,823 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:14:21,823 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:14:21,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:14:21,824 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:14:21,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:14:32,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:15:12,805 INFO L134 CoverageAnalysis]: Checked inductivity of 8268996 backedges. 11212 proven. 113651 refuted. 0 times theorem prover too weak. 8144133 trivial. 0 not checked. [2019-09-08 06:15:12,805 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:15:12,805 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:15:12,818 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 06:15:16,083 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 06:15:16,083 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:15:16,133 INFO L256 TraceCheckSpWp]: Trace formula consists of 25884 conjuncts, 30 conjunts are in the unsatisfiable core [2019-09-08 06:15:16,238 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:15:54,746 INFO L134 CoverageAnalysis]: Checked inductivity of 8268996 backedges. 11035 proven. 123619 refuted. 0 times theorem prover too weak. 8134342 trivial. 0 not checked. [2019-09-08 06:15:54,766 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:15:54,768 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 18 [2019-09-08 06:15:54,775 INFO L454 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-09-08 06:15:54,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-09-08 06:15:54,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2019-09-08 06:15:54,776 INFO L87 Difference]: Start difference. First operand 179 states and 327 transitions. Second operand 18 states. [2019-09-08 06:15:55,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:15:55,232 INFO L93 Difference]: Finished difference Result 188 states and 356 transitions. [2019-09-08 06:15:55,233 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-09-08 06:15:55,233 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 11657 [2019-09-08 06:15:55,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:15:55,247 INFO L225 Difference]: With dead ends: 188 [2019-09-08 06:15:55,247 INFO L226 Difference]: Without dead ends: 184 [2019-09-08 06:15:55,252 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 11699 GetRequests, 11669 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=362, Invalid=630, Unknown=0, NotChecked=0, Total=992 [2019-09-08 06:15:55,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2019-09-08 06:15:55,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2019-09-08 06:15:55,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2019-09-08 06:15:55,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 350 transitions. [2019-09-08 06:15:55,276 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 350 transitions. Word has length 11657 [2019-09-08 06:15:55,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:15:55,279 INFO L475 AbstractCegarLoop]: Abstraction has 184 states and 350 transitions. [2019-09-08 06:15:55,279 INFO L476 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-09-08 06:15:55,279 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 350 transitions. [2019-09-08 06:15:56,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18290 [2019-09-08 06:15:56,764 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:15:56,769 INFO L399 BasicCegarLoop]: trace histogram [2685, 2685, 2172, 1342, 1342, 1342, 1342, 1342, 1342, 1342, 830, 513, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:15:56,769 INFO L418 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:15:56,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:15:56,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1308888711, now seen corresponding path program 15 times [2019-09-08 06:15:56,773 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:15:56,773 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:15:56,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:15:56,774 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:15:56,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:16:29,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:18:05,826 INFO L134 CoverageAnalysis]: Checked inductivity of 20370030 backedges. 21062 proven. 190856 refuted. 0 times theorem prover too weak. 20158112 trivial. 0 not checked. [2019-09-08 06:18:05,827 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:18:05,827 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:18:05,839 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 06:18:06,855 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 60 check-sat command(s) [2019-09-08 06:18:06,855 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:18:06,861 INFO L256 TraceCheckSpWp]: Trace formula consists of 1154 conjuncts, 32 conjunts are in the unsatisfiable core [2019-09-08 06:18:06,988 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:19:40,736 INFO L134 CoverageAnalysis]: Checked inductivity of 20370030 backedges. 19772 proven. 207584 refuted. 0 times theorem prover too weak. 20142674 trivial. 0 not checked. [2019-09-08 06:19:40,741 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:19:40,744 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 19 [2019-09-08 06:19:40,751 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-08 06:19:40,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-08 06:19:40,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2019-09-08 06:19:40,752 INFO L87 Difference]: Start difference. First operand 184 states and 350 transitions. Second operand 19 states. [2019-09-08 06:19:41,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:19:41,273 INFO L93 Difference]: Finished difference Result 193 states and 381 transitions. [2019-09-08 06:19:41,273 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-09-08 06:19:41,273 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 18289 [2019-09-08 06:19:41,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:19:41,292 INFO L225 Difference]: With dead ends: 193 [2019-09-08 06:19:41,293 INFO L226 Difference]: Without dead ends: 189 [2019-09-08 06:19:41,294 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 18334 GetRequests, 18302 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=410, Invalid=712, Unknown=0, NotChecked=0, Total=1122 [2019-09-08 06:19:41,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2019-09-08 06:19:41,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2019-09-08 06:19:41,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2019-09-08 06:19:41,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 375 transitions. [2019-09-08 06:19:41,310 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 375 transitions. Word has length 18289 [2019-09-08 06:19:41,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:19:41,314 INFO L475 AbstractCegarLoop]: Abstraction has 189 states and 375 transitions. [2019-09-08 06:19:41,315 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-08 06:19:41,315 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 375 transitions. [2019-09-08 06:19:46,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34291 [2019-09-08 06:19:46,444 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:19:46,451 INFO L399 BasicCegarLoop]: trace histogram [5035, 5035, 4073, 2517, 2517, 2517, 2517, 2517, 2517, 2517, 1556, 962, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:19:46,451 INFO L418 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:19:46,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:19:46,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1350491726, now seen corresponding path program 16 times [2019-09-08 06:19:46,455 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:19:46,455 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:19:46,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:19:46,457 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:19:46,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:21:53,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat