java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_20-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-08 06:18:01,835 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-08 06:18:01,838 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-08 06:18:01,855 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-08 06:18:01,856 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-08 06:18:01,857 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-08 06:18:01,860 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-08 06:18:01,864 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-08 06:18:01,866 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-08 06:18:01,867 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-08 06:18:01,868 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-08 06:18:01,874 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-08 06:18:01,874 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-08 06:18:01,877 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-08 06:18:01,878 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-08 06:18:01,879 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-08 06:18:01,882 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-08 06:18:01,883 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-08 06:18:01,887 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-08 06:18:01,889 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-08 06:18:01,891 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-08 06:18:01,892 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-08 06:18:01,896 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-08 06:18:01,897 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-08 06:18:01,900 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-08 06:18:01,908 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-08 06:18:01,909 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-08 06:18:01,910 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-08 06:18:01,911 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 06:18:01,929 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-08 06:18:01,929 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-08 06:18:01,932 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-08 06:18:01,932 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-08 06:18:01,932 INFO L138 SettingsManager]: * Use SBE=true [2019-09-08 06:18:01,933 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-08 06:18:01,933 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-08 06:18:01,933 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-08 06:18:01,933 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-08 06:18:01,933 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-08 06:18:01,934 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-08 06:18:01,935 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-08 06:18:01,935 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-08 06:18:01,935 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-08 06:18:01,935 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-08 06:18:01,936 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-08 06:18:01,936 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-08 06:18:01,936 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-08 06:18:01,936 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-08 06:18:01,936 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-08 06:18:01,937 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-08 06:18:01,937 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-08 06:18:01,937 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-08 06:18:01,937 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-08 06:18:01,938 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-08 06:18:01,938 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-08 06:18:01,938 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-08 06:18:01,938 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-08 06:18:01,939 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-08 06:18:01,978 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-08 06:18:01,993 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-08 06:18:02,000 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-08 06:18:02,002 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-08 06:18:02,002 INFO L275 PluginConnector]: CDTParser initialized [2019-09-08 06:18:02,003 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_20-1.c [2019-09-08 06:18:02,079 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/200790f59/20d7f465bed34b46a25b44edf4d7a830/FLAG62fcf220d [2019-09-08 06:18:02,507 INFO L306 CDTParser]: Found 1 translation units. [2019-09-08 06:18:02,508 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_20-1.c [2019-09-08 06:18:02,515 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/200790f59/20d7f465bed34b46a25b44edf4d7a830/FLAG62fcf220d [2019-09-08 06:18:02,948 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/200790f59/20d7f465bed34b46a25b44edf4d7a830 [2019-09-08 06:18:02,959 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-08 06:18:02,961 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-08 06:18:02,962 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-08 06:18:02,962 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-08 06:18:02,966 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-08 06:18:02,967 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.09 06:18:02" (1/1) ... [2019-09-08 06:18:02,970 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c69540a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:18:02, skipping insertion in model container [2019-09-08 06:18:02,970 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.09 06:18:02" (1/1) ... [2019-09-08 06:18:02,978 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-08 06:18:02,997 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-08 06:18:03,243 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-08 06:18:03,250 INFO L188 MainTranslator]: Completed pre-run [2019-09-08 06:18:03,268 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-08 06:18:03,281 INFO L192 MainTranslator]: Completed translation [2019-09-08 06:18:03,282 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:18:03 WrapperNode [2019-09-08 06:18:03,282 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-08 06:18:03,283 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-08 06:18:03,283 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-08 06:18:03,283 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-08 06:18:03,402 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:18:03" (1/1) ... [2019-09-08 06:18:03,403 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:18:03" (1/1) ... [2019-09-08 06:18:03,408 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:18:03" (1/1) ... [2019-09-08 06:18:03,408 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:18:03" (1/1) ... [2019-09-08 06:18:03,412 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:18:03" (1/1) ... [2019-09-08 06:18:03,414 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:18:03" (1/1) ... [2019-09-08 06:18:03,415 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:18:03" (1/1) ... [2019-09-08 06:18:03,416 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-08 06:18:03,417 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-08 06:18:03,417 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-08 06:18:03,417 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-08 06:18:03,418 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:18:03" (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 06:18:03,475 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-08 06:18:03,476 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-08 06:18:03,476 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2019-09-08 06:18:03,476 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2019-09-08 06:18:03,476 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-08 06:18:03,476 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-08 06:18:03,476 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-08 06:18:03,476 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2019-09-08 06:18:03,476 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2019-09-08 06:18:03,477 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-08 06:18:03,477 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-08 06:18:03,477 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-08 06:18:03,690 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-08 06:18:03,691 INFO L283 CfgBuilder]: Removed 0 assume(true) statements. [2019-09-08 06:18:03,693 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.09 06:18:03 BoogieIcfgContainer [2019-09-08 06:18:03,694 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-08 06:18:03,698 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-08 06:18:03,698 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-08 06:18:03,705 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-08 06:18:03,706 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.09 06:18:02" (1/3) ... [2019-09-08 06:18:03,707 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a5b0200 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.09 06:18:03, skipping insertion in model container [2019-09-08 06:18:03,707 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:18:03" (2/3) ... [2019-09-08 06:18:03,708 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a5b0200 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.09 06:18:03, skipping insertion in model container [2019-09-08 06:18:03,708 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.09 06:18:03" (3/3) ... [2019-09-08 06:18:03,711 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_20-1.c [2019-09-08 06:18:03,727 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-08 06:18:03,737 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-08 06:18:03,772 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-08 06:18:03,807 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-08 06:18:03,808 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-08 06:18:03,808 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-08 06:18:03,808 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-08 06:18:03,808 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-08 06:18:03,809 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-08 06:18:03,809 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-08 06:18:03,809 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-08 06:18:03,809 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-08 06:18:03,832 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2019-09-08 06:18:03,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-09-08 06:18:03,840 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:18:03,842 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:18:03,844 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:18:03,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:18:03,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2019-09-08 06:18:03,851 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:18:03,851 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:18:03,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:18:03,894 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:18:03,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:18:03,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:18:04,024 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 06:18:04,027 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-08 06:18:04,027 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-08 06:18:04,031 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-08 06:18:04,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-08 06:18:04,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-08 06:18:04,044 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2019-09-08 06:18:04,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:18:04,161 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2019-09-08 06:18:04,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-08 06:18:04,163 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2019-09-08 06:18:04,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:18:04,174 INFO L225 Difference]: With dead ends: 44 [2019-09-08 06:18:04,174 INFO L226 Difference]: Without dead ends: 30 [2019-09-08 06:18:04,178 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 06:18:04,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-09-08 06:18:04,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-09-08 06:18:04,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-09-08 06:18:04,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2019-09-08 06:18:04,228 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2019-09-08 06:18:04,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:18:04,229 INFO L475 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2019-09-08 06:18:04,229 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-08 06:18:04,229 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2019-09-08 06:18:04,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-09-08 06:18:04,231 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:18:04,231 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:18:04,231 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:18:04,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:18:04,232 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2019-09-08 06:18:04,232 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:18:04,232 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:18:04,233 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:18:04,234 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:18:04,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:18:04,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:18:04,272 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 06:18:04,272 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-08 06:18:04,273 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-08 06:18:04,274 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-08 06:18:04,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-08 06:18:04,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-08 06:18:04,275 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2019-09-08 06:18:04,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:18:04,297 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2019-09-08 06:18:04,297 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-08 06:18:04,297 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2019-09-08 06:18:04,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:18:04,299 INFO L225 Difference]: With dead ends: 36 [2019-09-08 06:18:04,299 INFO L226 Difference]: Without dead ends: 32 [2019-09-08 06:18:04,301 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 06:18:04,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-09-08 06:18:04,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2019-09-08 06:18:04,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-09-08 06:18:04,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2019-09-08 06:18:04,312 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2019-09-08 06:18:04,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:18:04,313 INFO L475 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2019-09-08 06:18:04,313 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-08 06:18:04,313 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2019-09-08 06:18:04,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-09-08 06:18:04,315 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:18:04,315 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:18:04,315 INFO L418 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:18:04,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:18:04,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2019-09-08 06:18:04,316 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:18:04,316 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:18:04,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:18:04,318 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:18:04,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:18:04,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:18:04,408 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-08 06:18:04,409 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:18:04,409 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-08 06:18:04,431 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:18:04,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:18:04,455 INFO L256 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-08 06:18:04,462 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:18:04,553 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-08 06:18:04,560 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:18:04,560 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2019-09-08 06:18:04,561 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-08 06:18:04,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-08 06:18:04,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2019-09-08 06:18:04,562 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 9 states. [2019-09-08 06:18:04,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:18:04,808 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2019-09-08 06:18:04,810 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-08 06:18:04,810 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2019-09-08 06:18:04,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:18:04,812 INFO L225 Difference]: With dead ends: 58 [2019-09-08 06:18:04,812 INFO L226 Difference]: Without dead ends: 34 [2019-09-08 06:18:04,813 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2019-09-08 06:18:04,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-09-08 06:18:04,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2019-09-08 06:18:04,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-09-08 06:18:04,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2019-09-08 06:18:04,824 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 26 [2019-09-08 06:18:04,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:18:04,824 INFO L475 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2019-09-08 06:18:04,824 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-08 06:18:04,824 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2019-09-08 06:18:04,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-09-08 06:18:04,828 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:18:04,828 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:18:04,829 INFO L418 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:18:04,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:18:04,829 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2019-09-08 06:18:04,829 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:18:04,830 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:18:04,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:18:04,832 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:18:04,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:18:04,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:18:04,950 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-08 06:18:04,950 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:18:04,950 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) [2019-09-08 06:18:04,967 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:18:04,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:18:04,986 INFO L256 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-08 06:18:04,991 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:18:05,013 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-08 06:18:05,018 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:18:05,019 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2019-09-08 06:18:05,020 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-08 06:18:05,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-08 06:18:05,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-09-08 06:18:05,022 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 7 states. [2019-09-08 06:18:05,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:18:05,172 INFO L93 Difference]: Finished difference Result 43 states and 55 transitions. [2019-09-08 06:18:05,174 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-08 06:18:05,174 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2019-09-08 06:18:05,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:18:05,176 INFO L225 Difference]: With dead ends: 43 [2019-09-08 06:18:05,176 INFO L226 Difference]: Without dead ends: 39 [2019-09-08 06:18:05,179 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-09-08 06:18:05,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-09-08 06:18:05,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2019-09-08 06:18:05,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-09-08 06:18:05,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2019-09-08 06:18:05,194 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 27 [2019-09-08 06:18:05,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:18:05,194 INFO L475 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2019-09-08 06:18:05,194 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-08 06:18:05,194 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2019-09-08 06:18:05,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-09-08 06:18:05,197 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:18:05,197 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:18:05,198 INFO L418 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:18:05,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:18:05,198 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2019-09-08 06:18:05,198 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:18:05,199 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:18:05,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:18:05,204 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:18:05,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:18:05,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:18:05,303 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-08 06:18:05,304 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:18:05,304 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:18:05,321 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:18:05,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:18:05,346 INFO L256 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-08 06:18:05,349 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:18:05,407 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-09-08 06:18:05,412 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:18:05,413 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 10 [2019-09-08 06:18:05,413 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-08 06:18:05,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-08 06:18:05,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-09-08 06:18:05,415 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand 10 states. [2019-09-08 06:18:05,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:18:05,690 INFO L93 Difference]: Finished difference Result 70 states and 100 transitions. [2019-09-08 06:18:05,691 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-08 06:18:05,692 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2019-09-08 06:18:05,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:18:05,694 INFO L225 Difference]: With dead ends: 70 [2019-09-08 06:18:05,694 INFO L226 Difference]: Without dead ends: 39 [2019-09-08 06:18:05,700 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2019-09-08 06:18:05,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-09-08 06:18:05,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2019-09-08 06:18:05,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-09-08 06:18:05,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 50 transitions. [2019-09-08 06:18:05,717 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 50 transitions. Word has length 39 [2019-09-08 06:18:05,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:18:05,717 INFO L475 AbstractCegarLoop]: Abstraction has 39 states and 50 transitions. [2019-09-08 06:18:05,717 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-08 06:18:05,717 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 50 transitions. [2019-09-08 06:18:05,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-09-08 06:18:05,719 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:18:05,719 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:18:05,720 INFO L418 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:18:05,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:18:05,720 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2019-09-08 06:18:05,720 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:18:05,720 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:18:05,721 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:18:05,721 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:18:05,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:18:05,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:18:05,852 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-09-08 06:18:05,853 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:18:05,853 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 06:18:05,871 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:18:05,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:18:05,891 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-08 06:18:05,894 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:18:05,973 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-08 06:18:05,978 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:18:05,978 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2019-09-08 06:18:05,979 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-08 06:18:05,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-08 06:18:05,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2019-09-08 06:18:05,980 INFO L87 Difference]: Start difference. First operand 39 states and 50 transitions. Second operand 14 states. [2019-09-08 06:18:06,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:18:06,565 INFO L93 Difference]: Finished difference Result 102 states and 162 transitions. [2019-09-08 06:18:06,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-08 06:18:06,567 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 40 [2019-09-08 06:18:06,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:18:06,570 INFO L225 Difference]: With dead ends: 102 [2019-09-08 06:18:06,570 INFO L226 Difference]: Without dead ends: 69 [2019-09-08 06:18:06,572 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2019-09-08 06:18:06,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-09-08 06:18:06,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 60. [2019-09-08 06:18:06,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-09-08 06:18:06,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 90 transitions. [2019-09-08 06:18:06,586 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 90 transitions. Word has length 40 [2019-09-08 06:18:06,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:18:06,587 INFO L475 AbstractCegarLoop]: Abstraction has 60 states and 90 transitions. [2019-09-08 06:18:06,587 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-08 06:18:06,587 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 90 transitions. [2019-09-08 06:18:06,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-09-08 06:18:06,590 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:18:06,590 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:18:06,591 INFO L418 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:18:06,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:18:06,591 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2019-09-08 06:18:06,591 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:18:06,591 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:18:06,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:18:06,593 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:18:06,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:18:06,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:18:06,698 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-09-08 06:18:06,698 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:18:06,699 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 06:18:06,721 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:18:06,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:18:06,749 INFO L256 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-08 06:18:06,755 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:18:06,835 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-09-08 06:18:06,839 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:18:06,839 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2019-09-08 06:18:06,840 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-08 06:18:06,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-08 06:18:06,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2019-09-08 06:18:06,841 INFO L87 Difference]: Start difference. First operand 60 states and 90 transitions. Second operand 12 states. [2019-09-08 06:18:07,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:18:07,048 INFO L93 Difference]: Finished difference Result 106 states and 197 transitions. [2019-09-08 06:18:07,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-09-08 06:18:07,049 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 54 [2019-09-08 06:18:07,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:18:07,052 INFO L225 Difference]: With dead ends: 106 [2019-09-08 06:18:07,053 INFO L226 Difference]: Without dead ends: 102 [2019-09-08 06:18:07,054 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2019-09-08 06:18:07,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2019-09-08 06:18:07,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 68. [2019-09-08 06:18:07,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-09-08 06:18:07,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 110 transitions. [2019-09-08 06:18:07,075 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 110 transitions. Word has length 54 [2019-09-08 06:18:07,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:18:07,075 INFO L475 AbstractCegarLoop]: Abstraction has 68 states and 110 transitions. [2019-09-08 06:18:07,075 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-08 06:18:07,075 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 110 transitions. [2019-09-08 06:18:07,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-09-08 06:18:07,081 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:18:07,081 INFO L399 BasicCegarLoop]: trace histogram [9, 9, 7, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:18:07,081 INFO L418 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:18:07,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:18:07,082 INFO L82 PathProgramCache]: Analyzing trace with hash -2119203654, now seen corresponding path program 1 times [2019-09-08 06:18:07,082 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:18:07,082 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:18:07,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:18:07,083 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:18:07,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:18:07,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:18:07,194 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 28 proven. 83 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2019-09-08 06:18:07,195 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:18:07,195 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:18:07,207 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:18:07,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:18:07,265 INFO L256 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 12 conjunts are in the unsatisfiable core [2019-09-08 06:18:07,291 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:18:07,368 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 17 proven. 119 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2019-09-08 06:18:07,382 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:18:07,394 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 11 [2019-09-08 06:18:07,396 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-08 06:18:07,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-08 06:18:07,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2019-09-08 06:18:07,398 INFO L87 Difference]: Start difference. First operand 68 states and 110 transitions. Second operand 11 states. [2019-09-08 06:18:07,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:18:07,610 INFO L93 Difference]: Finished difference Result 108 states and 210 transitions. [2019-09-08 06:18:07,611 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-08 06:18:07,611 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 110 [2019-09-08 06:18:07,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:18:07,614 INFO L225 Difference]: With dead ends: 108 [2019-09-08 06:18:07,614 INFO L226 Difference]: Without dead ends: 104 [2019-09-08 06:18:07,615 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2019-09-08 06:18:07,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-09-08 06:18:07,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 72. [2019-09-08 06:18:07,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-09-08 06:18:07,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 125 transitions. [2019-09-08 06:18:07,638 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 125 transitions. Word has length 110 [2019-09-08 06:18:07,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:18:07,639 INFO L475 AbstractCegarLoop]: Abstraction has 72 states and 125 transitions. [2019-09-08 06:18:07,639 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-08 06:18:07,639 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 125 transitions. [2019-09-08 06:18:07,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2019-09-08 06:18:07,647 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:18:07,647 INFO L399 BasicCegarLoop]: trace histogram [14, 14, 11, 11, 10, 8, 7, 7, 7, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:18:07,647 INFO L418 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:18:07,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:18:07,648 INFO L82 PathProgramCache]: Analyzing trace with hash 1268449399, now seen corresponding path program 1 times [2019-09-08 06:18:07,648 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:18:07,648 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:18:07,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:18:07,649 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:18:07,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:18:07,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:18:07,801 INFO L134 CoverageAnalysis]: Checked inductivity of 781 backedges. 68 proven. 182 refuted. 0 times theorem prover too weak. 531 trivial. 0 not checked. [2019-09-08 06:18:07,801 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:18:07,801 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 06:18:07,816 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:18:07,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:18:07,881 INFO L256 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 14 conjunts are in the unsatisfiable core [2019-09-08 06:18:07,887 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:18:08,044 INFO L134 CoverageAnalysis]: Checked inductivity of 781 backedges. 55 proven. 248 refuted. 0 times theorem prover too weak. 478 trivial. 0 not checked. [2019-09-08 06:18:08,050 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:18:08,051 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2019-09-08 06:18:08,053 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-08 06:18:08,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-08 06:18:08,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2019-09-08 06:18:08,054 INFO L87 Difference]: Start difference. First operand 72 states and 125 transitions. Second operand 16 states. [2019-09-08 06:18:08,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:18:08,424 INFO L93 Difference]: Finished difference Result 155 states and 406 transitions. [2019-09-08 06:18:08,425 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-08 06:18:08,425 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 175 [2019-09-08 06:18:08,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:18:08,430 INFO L225 Difference]: With dead ends: 155 [2019-09-08 06:18:08,430 INFO L226 Difference]: Without dead ends: 151 [2019-09-08 06:18:08,432 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=148, Invalid=554, Unknown=0, NotChecked=0, Total=702 [2019-09-08 06:18:08,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2019-09-08 06:18:08,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 87. [2019-09-08 06:18:08,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-09-08 06:18:08,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 171 transitions. [2019-09-08 06:18:08,466 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 171 transitions. Word has length 175 [2019-09-08 06:18:08,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:18:08,467 INFO L475 AbstractCegarLoop]: Abstraction has 87 states and 171 transitions. [2019-09-08 06:18:08,467 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-08 06:18:08,468 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 171 transitions. [2019-09-08 06:18:08,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 417 [2019-09-08 06:18:08,480 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:18:08,480 INFO L399 BasicCegarLoop]: trace histogram [37, 37, 33, 22, 22, 22, 22, 18, 18, 18, 18, 18, 18, 18, 11, 11, 11, 11, 11, 11, 11, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:18:08,481 INFO L418 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:18:08,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:18:08,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1137031458, now seen corresponding path program 2 times [2019-09-08 06:18:08,482 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:18:08,482 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:18:08,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:18:08,484 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:18:08,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:18:08,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:18:08,912 INFO L134 CoverageAnalysis]: Checked inductivity of 5179 backedges. 185 proven. 631 refuted. 0 times theorem prover too weak. 4363 trivial. 0 not checked. [2019-09-08 06:18:08,913 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:18:08,913 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 06:18:08,927 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 06:18:09,056 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 06:18:09,057 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:18:09,059 INFO L256 TraceCheckSpWp]: Trace formula consists of 924 conjuncts, 16 conjunts are in the unsatisfiable core [2019-09-08 06:18:09,079 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:18:09,341 INFO L134 CoverageAnalysis]: Checked inductivity of 5179 backedges. 136 proven. 916 refuted. 0 times theorem prover too weak. 4127 trivial. 0 not checked. [2019-09-08 06:18:09,347 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:18:09,347 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2019-09-08 06:18:09,348 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-08 06:18:09,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-08 06:18:09,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2019-09-08 06:18:09,349 INFO L87 Difference]: Start difference. First operand 87 states and 171 transitions. Second operand 19 states. [2019-09-08 06:18:10,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:18:10,437 INFO L93 Difference]: Finished difference Result 250 states and 676 transitions. [2019-09-08 06:18:10,437 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-09-08 06:18:10,438 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 416 [2019-09-08 06:18:10,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:18:10,443 INFO L225 Difference]: With dead ends: 250 [2019-09-08 06:18:10,444 INFO L226 Difference]: Without dead ends: 169 [2019-09-08 06:18:10,449 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 410 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=296, Invalid=1426, Unknown=0, NotChecked=0, Total=1722 [2019-09-08 06:18:10,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2019-09-08 06:18:10,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 146. [2019-09-08 06:18:10,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2019-09-08 06:18:10,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 252 transitions. [2019-09-08 06:18:10,475 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 252 transitions. Word has length 416 [2019-09-08 06:18:10,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:18:10,476 INFO L475 AbstractCegarLoop]: Abstraction has 146 states and 252 transitions. [2019-09-08 06:18:10,476 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-08 06:18:10,476 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 252 transitions. [2019-09-08 06:18:10,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 543 [2019-09-08 06:18:10,490 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:18:10,491 INFO L399 BasicCegarLoop]: trace histogram [46, 46, 35, 33, 33, 26, 23, 23, 23, 23, 23, 23, 23, 19, 16, 16, 16, 16, 16, 16, 16, 11, 7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:18:10,491 INFO L418 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:18:10,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:18:10,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1647913590, now seen corresponding path program 2 times [2019-09-08 06:18:10,492 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:18:10,492 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:18:10,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:18:10,494 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:18:10,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:18:10,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:18:10,971 INFO L134 CoverageAnalysis]: Checked inductivity of 8664 backedges. 224 proven. 974 refuted. 0 times theorem prover too weak. 7466 trivial. 0 not checked. [2019-09-08 06:18:10,971 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:18:10,971 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 06:18:11,001 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 06:18:11,149 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 06:18:11,150 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:18:11,152 INFO L256 TraceCheckSpWp]: Trace formula consists of 1206 conjuncts, 18 conjunts are in the unsatisfiable core [2019-09-08 06:18:11,171 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:18:11,453 INFO L134 CoverageAnalysis]: Checked inductivity of 8664 backedges. 190 proven. 1385 refuted. 0 times theorem prover too weak. 7089 trivial. 0 not checked. [2019-09-08 06:18:11,458 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:18:11,459 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 18 [2019-09-08 06:18:11,460 INFO L454 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-09-08 06:18:11,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-09-08 06:18:11,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2019-09-08 06:18:11,461 INFO L87 Difference]: Start difference. First operand 146 states and 252 transitions. Second operand 18 states. [2019-09-08 06:18:11,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:18:11,891 INFO L93 Difference]: Finished difference Result 203 states and 444 transitions. [2019-09-08 06:18:11,891 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-09-08 06:18:11,891 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 542 [2019-09-08 06:18:11,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:18:11,900 INFO L225 Difference]: With dead ends: 203 [2019-09-08 06:18:11,900 INFO L226 Difference]: Without dead ends: 199 [2019-09-08 06:18:11,901 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 569 GetRequests, 540 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=193, Invalid=737, Unknown=0, NotChecked=0, Total=930 [2019-09-08 06:18:11,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2019-09-08 06:18:11,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 168. [2019-09-08 06:18:11,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2019-09-08 06:18:11,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 321 transitions. [2019-09-08 06:18:11,925 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 321 transitions. Word has length 542 [2019-09-08 06:18:11,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:18:11,927 INFO L475 AbstractCegarLoop]: Abstraction has 168 states and 321 transitions. [2019-09-08 06:18:11,927 INFO L476 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-09-08 06:18:11,927 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 321 transitions. [2019-09-08 06:18:11,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1310 [2019-09-08 06:18:11,979 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:18:11,980 INFO L399 BasicCegarLoop]: trace histogram [102, 102, 91, 91, 79, 65, 51, 51, 51, 51, 51, 51, 51, 45, 45, 45, 45, 45, 45, 45, 34, 26, 23, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:18:11,980 INFO L418 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:18:11,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:18:11,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1352542661, now seen corresponding path program 3 times [2019-09-08 06:18:11,981 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:18:11,981 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:18:11,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:18:11,982 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:18:11,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:18:12,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:18:13,599 INFO L134 CoverageAnalysis]: Checked inductivity of 51205 backedges. 597 proven. 2868 refuted. 0 times theorem prover too weak. 47740 trivial. 0 not checked. [2019-09-08 06:18:13,600 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:18:13,600 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 06:18:13,611 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 06:18:13,734 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2019-09-08 06:18:13,735 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:18:13,736 INFO L256 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-08 06:18:13,759 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:18:14,602 INFO L134 CoverageAnalysis]: Checked inductivity of 51205 backedges. 4106 proven. 6 refuted. 0 times theorem prover too weak. 47093 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 06:18:14,607 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:18:14,608 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 17 [2019-09-08 06:18:14,610 INFO L454 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-09-08 06:18:14,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-09-08 06:18:14,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2019-09-08 06:18:14,611 INFO L87 Difference]: Start difference. First operand 168 states and 321 transitions. Second operand 17 states. [2019-09-08 06:18:15,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:18:15,495 INFO L93 Difference]: Finished difference Result 477 states and 1329 transitions. [2019-09-08 06:18:15,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-09-08 06:18:15,497 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 1309 [2019-09-08 06:18:15,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:18:15,506 INFO L225 Difference]: With dead ends: 477 [2019-09-08 06:18:15,506 INFO L226 Difference]: Without dead ends: 321 [2019-09-08 06:18:15,511 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 1344 GetRequests, 1310 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=216, Invalid=1044, Unknown=0, NotChecked=0, Total=1260 [2019-09-08 06:18:15,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2019-09-08 06:18:15,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 280. [2019-09-08 06:18:15,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2019-09-08 06:18:15,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 641 transitions. [2019-09-08 06:18:15,557 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 641 transitions. Word has length 1309 [2019-09-08 06:18:15,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:18:15,557 INFO L475 AbstractCegarLoop]: Abstraction has 280 states and 641 transitions. [2019-09-08 06:18:15,558 INFO L476 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-09-08 06:18:15,558 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 641 transitions. [2019-09-08 06:18:15,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1090 [2019-09-08 06:18:15,573 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:18:15,573 INFO L399 BasicCegarLoop]: trace histogram [81, 81, 78, 78, 65, 63, 40, 40, 40, 40, 40, 40, 40, 39, 39, 39, 39, 39, 39, 39, 25, 24, 18, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:18:15,574 INFO L418 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:18:15,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:18:15,575 INFO L82 PathProgramCache]: Analyzing trace with hash -1832764714, now seen corresponding path program 4 times [2019-09-08 06:18:15,575 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:18:15,575 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:18:15,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:18:15,577 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:18:15,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:18:15,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:18:16,535 INFO L134 CoverageAnalysis]: Checked inductivity of 35089 backedges. 477 proven. 2870 refuted. 0 times theorem prover too weak. 31742 trivial. 0 not checked. [2019-09-08 06:18:16,535 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:18:16,536 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) [2019-09-08 06:18:16,554 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:18:16,843 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 06:18:16,844 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:18:16,847 INFO L256 TraceCheckSpWp]: Trace formula consists of 1938 conjuncts, 21 conjunts are in the unsatisfiable core [2019-09-08 06:18:16,866 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:18:18,136 INFO L134 CoverageAnalysis]: Checked inductivity of 35089 backedges. 11128 proven. 349 refuted. 0 times theorem prover too weak. 23612 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (12)] Exception during sending of exit command (exit): Broken pipe [2019-09-08 06:18:18,144 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:18:18,145 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17] total 23 [2019-09-08 06:18:18,146 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-09-08 06:18:18,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-09-08 06:18:18,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2019-09-08 06:18:18,149 INFO L87 Difference]: Start difference. First operand 280 states and 641 transitions. Second operand 23 states. [2019-09-08 06:18:19,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:18:19,789 INFO L93 Difference]: Finished difference Result 651 states and 2144 transitions. [2019-09-08 06:18:19,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2019-09-08 06:18:19,789 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 1089 [2019-09-08 06:18:19,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:18:19,804 INFO L225 Difference]: With dead ends: 651 [2019-09-08 06:18:19,804 INFO L226 Difference]: Without dead ends: 362 [2019-09-08 06:18:19,813 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 1141 GetRequests, 1086 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=481, Invalid=2711, Unknown=0, NotChecked=0, Total=3192 [2019-09-08 06:18:19,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2019-09-08 06:18:19,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 275. [2019-09-08 06:18:19,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2019-09-08 06:18:19,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 602 transitions. [2019-09-08 06:18:19,855 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 602 transitions. Word has length 1089 [2019-09-08 06:18:19,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:18:19,856 INFO L475 AbstractCegarLoop]: Abstraction has 275 states and 602 transitions. [2019-09-08 06:18:19,856 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-09-08 06:18:19,856 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 602 transitions. [2019-09-08 06:18:19,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1122 [2019-09-08 06:18:19,874 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:18:19,874 INFO L399 BasicCegarLoop]: trace histogram [88, 88, 75, 75, 71, 65, 44, 44, 44, 44, 44, 44, 44, 37, 37, 37, 37, 37, 37, 37, 34, 21, 17, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:18:19,875 INFO L418 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:18:19,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:18:19,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1694035302, now seen corresponding path program 5 times [2019-09-08 06:18:19,876 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:18:19,876 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:18:19,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:18:19,877 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:18:19,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:18:20,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:18:21,063 INFO L134 CoverageAnalysis]: Checked inductivity of 37425 backedges. 696 proven. 2775 refuted. 0 times theorem prover too weak. 33954 trivial. 0 not checked. [2019-09-08 06:18:21,064 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:18:21,064 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) [2019-09-08 06:18:21,084 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:18:21,172 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2019-09-08 06:18:21,173 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:18:21,174 INFO L256 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-08 06:18:21,188 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:18:21,758 INFO L134 CoverageAnalysis]: Checked inductivity of 37425 backedges. 8492 proven. 4 refuted. 0 times theorem prover too weak. 28929 trivial. 0 not checked. [2019-09-08 06:18:21,762 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:18:21,763 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7] total 16 [2019-09-08 06:18:21,764 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-08 06:18:21,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-08 06:18:21,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2019-09-08 06:18:21,765 INFO L87 Difference]: Start difference. First operand 275 states and 602 transitions. Second operand 16 states. [2019-09-08 06:18:22,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:18:22,339 INFO L93 Difference]: Finished difference Result 657 states and 1928 transitions. [2019-09-08 06:18:22,339 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-09-08 06:18:22,340 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 1121 [2019-09-08 06:18:22,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:18:22,350 INFO L225 Difference]: With dead ends: 657 [2019-09-08 06:18:22,351 INFO L226 Difference]: Without dead ends: 399 [2019-09-08 06:18:22,356 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 1150 GetRequests, 1125 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2019-09-08 06:18:22,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2019-09-08 06:18:22,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 351. [2019-09-08 06:18:22,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351 states. [2019-09-08 06:18:22,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 887 transitions. [2019-09-08 06:18:22,407 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 887 transitions. Word has length 1121 [2019-09-08 06:18:22,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:18:22,407 INFO L475 AbstractCegarLoop]: Abstraction has 351 states and 887 transitions. [2019-09-08 06:18:22,408 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-08 06:18:22,408 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 887 transitions. [2019-09-08 06:18:22,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1093 [2019-09-08 06:18:22,425 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:18:22,426 INFO L399 BasicCegarLoop]: trace histogram [82, 82, 77, 77, 66, 65, 41, 41, 41, 41, 41, 41, 41, 38, 38, 38, 38, 38, 38, 38, 28, 24, 16, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:18:22,426 INFO L418 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:18:22,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:18:22,427 INFO L82 PathProgramCache]: Analyzing trace with hash -671171464, now seen corresponding path program 6 times [2019-09-08 06:18:22,427 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:18:22,427 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:18:22,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:18:22,428 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:18:22,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:18:22,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:18:23,377 INFO L134 CoverageAnalysis]: Checked inductivity of 35305 backedges. 1157 proven. 1705 refuted. 0 times theorem prover too weak. 32443 trivial. 0 not checked. [2019-09-08 06:18:23,378 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:18:23,378 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 06:18:23,390 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-08 06:18:23,479 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-09-08 06:18:23,479 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:18:23,480 INFO L256 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-08 06:18:23,494 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:18:24,043 INFO L134 CoverageAnalysis]: Checked inductivity of 35305 backedges. 3310 proven. 7 refuted. 0 times theorem prover too weak. 31988 trivial. 0 not checked. [2019-09-08 06:18:24,048 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:18:24,048 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 13 [2019-09-08 06:18:24,050 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-08 06:18:24,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-08 06:18:24,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2019-09-08 06:18:24,050 INFO L87 Difference]: Start difference. First operand 351 states and 887 transitions. Second operand 13 states. [2019-09-08 06:18:24,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:18:24,317 INFO L93 Difference]: Finished difference Result 672 states and 2044 transitions. [2019-09-08 06:18:24,318 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-08 06:18:24,318 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 1092 [2019-09-08 06:18:24,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:18:24,327 INFO L225 Difference]: With dead ends: 672 [2019-09-08 06:18:24,327 INFO L226 Difference]: Without dead ends: 337 [2019-09-08 06:18:24,336 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 1107 GetRequests, 1091 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2019-09-08 06:18:24,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2019-09-08 06:18:24,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 337. [2019-09-08 06:18:24,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 337 states. [2019-09-08 06:18:24,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 784 transitions. [2019-09-08 06:18:24,375 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 784 transitions. Word has length 1092 [2019-09-08 06:18:24,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:18:24,376 INFO L475 AbstractCegarLoop]: Abstraction has 337 states and 784 transitions. [2019-09-08 06:18:24,376 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-08 06:18:24,376 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 784 transitions. [2019-09-08 06:18:24,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1310 [2019-09-08 06:18:24,400 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:18:24,400 INFO L399 BasicCegarLoop]: trace histogram [100, 100, 91, 91, 81, 75, 50, 50, 50, 50, 50, 50, 50, 45, 45, 45, 45, 45, 45, 45, 31, 30, 25, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:18:24,401 INFO L418 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:18:24,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:18:24,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1976075226, now seen corresponding path program 7 times [2019-09-08 06:18:24,402 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:18:24,402 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:18:24,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:18:24,403 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:18:24,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:18:24,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:18:25,945 INFO L134 CoverageAnalysis]: Checked inductivity of 51055 backedges. 653 proven. 3426 refuted. 0 times theorem prover too weak. 46976 trivial. 0 not checked. [2019-09-08 06:18:25,946 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:18:25,946 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 06:18:25,978 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:18:26,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:18:26,335 INFO L256 TraceCheckSpWp]: Trace formula consists of 2908 conjuncts, 22 conjunts are in the unsatisfiable core [2019-09-08 06:18:26,352 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:18:27,122 INFO L134 CoverageAnalysis]: Checked inductivity of 51055 backedges. 589 proven. 4500 refuted. 0 times theorem prover too weak. 45966 trivial. 0 not checked. [2019-09-08 06:18:27,128 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:18:27,129 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 21 [2019-09-08 06:18:27,130 INFO L454 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-09-08 06:18:27,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-09-08 06:18:27,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2019-09-08 06:18:27,131 INFO L87 Difference]: Start difference. First operand 337 states and 784 transitions. Second operand 21 states. [2019-09-08 06:18:27,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:18:27,813 INFO L93 Difference]: Finished difference Result 425 states and 1223 transitions. [2019-09-08 06:18:27,813 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-09-08 06:18:27,813 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 1309 [2019-09-08 06:18:27,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:18:27,825 INFO L225 Difference]: With dead ends: 425 [2019-09-08 06:18:27,826 INFO L226 Difference]: Without dead ends: 421 [2019-09-08 06:18:27,828 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 1343 GetRequests, 1308 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=271, Invalid=1061, Unknown=0, NotChecked=0, Total=1332 [2019-09-08 06:18:27,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2019-09-08 06:18:27,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 383. [2019-09-08 06:18:27,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 383 states. [2019-09-08 06:18:27,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 1018 transitions. [2019-09-08 06:18:27,880 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 1018 transitions. Word has length 1309 [2019-09-08 06:18:27,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:18:27,881 INFO L475 AbstractCegarLoop]: Abstraction has 383 states and 1018 transitions. [2019-09-08 06:18:27,881 INFO L476 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-09-08 06:18:27,881 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 1018 transitions. [2019-09-08 06:18:27,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2440 [2019-09-08 06:18:27,945 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:18:27,946 INFO L399 BasicCegarLoop]: trace histogram [186, 186, 171, 171, 149, 141, 93, 93, 93, 93, 93, 93, 93, 85, 85, 85, 85, 85, 85, 85, 64, 48, 37, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:18:27,946 INFO L418 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:18:27,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:18:27,948 INFO L82 PathProgramCache]: Analyzing trace with hash 527502185, now seen corresponding path program 8 times [2019-09-08 06:18:27,948 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:18:27,948 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:18:27,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:18:27,949 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:18:27,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:18:28,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:18:31,824 INFO L134 CoverageAnalysis]: Checked inductivity of 179248 backedges. 1376 proven. 7346 refuted. 0 times theorem prover too weak. 170526 trivial. 0 not checked. [2019-09-08 06:18:31,824 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:18:31,824 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 06:18:31,835 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 06:18:32,519 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 06:18:32,520 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:18:32,532 INFO L256 TraceCheckSpWp]: Trace formula consists of 5417 conjuncts, 24 conjunts are in the unsatisfiable core [2019-09-08 06:18:32,562 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:18:35,003 INFO L134 CoverageAnalysis]: Checked inductivity of 179248 backedges. 1250 proven. 9435 refuted. 0 times theorem prover too weak. 168563 trivial. 0 not checked. [2019-09-08 06:18:35,012 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:18:35,013 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 22 [2019-09-08 06:18:35,014 INFO L454 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-09-08 06:18:35,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-09-08 06:18:35,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2019-09-08 06:18:35,015 INFO L87 Difference]: Start difference. First operand 383 states and 1018 transitions. Second operand 22 states. [2019-09-08 06:18:35,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:18:35,868 INFO L93 Difference]: Finished difference Result 529 states and 1977 transitions. [2019-09-08 06:18:35,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-09-08 06:18:35,869 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 2439 [2019-09-08 06:18:35,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:18:35,889 INFO L225 Difference]: With dead ends: 529 [2019-09-08 06:18:35,889 INFO L226 Difference]: Without dead ends: 525 [2019-09-08 06:18:35,891 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 2476 GetRequests, 2439 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=301, Invalid=1181, Unknown=0, NotChecked=0, Total=1482 [2019-09-08 06:18:35,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2019-09-08 06:18:35,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 392. [2019-09-08 06:18:35,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 392 states. [2019-09-08 06:18:35,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 1099 transitions. [2019-09-08 06:18:35,967 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 1099 transitions. Word has length 2439 [2019-09-08 06:18:35,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:18:35,968 INFO L475 AbstractCegarLoop]: Abstraction has 392 states and 1099 transitions. [2019-09-08 06:18:35,968 INFO L476 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-09-08 06:18:35,968 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 1099 transitions. [2019-09-08 06:18:36,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5483 [2019-09-08 06:18:36,178 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:18:36,180 INFO L399 BasicCegarLoop]: trace histogram [421, 421, 384, 384, 344, 301, 210, 210, 210, 210, 210, 210, 210, 192, 192, 192, 192, 192, 192, 192, 152, 91, 83, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:18:36,181 INFO L418 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:18:36,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:18:36,182 INFO L82 PathProgramCache]: Analyzing trace with hash -1352942363, now seen corresponding path program 9 times [2019-09-08 06:18:36,182 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:18:36,182 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:18:36,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:18:36,183 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:18:36,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:18:37,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:18:49,448 INFO L134 CoverageAnalysis]: Checked inductivity of 913054 backedges. 2971 proven. 23429 refuted. 0 times theorem prover too weak. 886654 trivial. 0 not checked. [2019-09-08 06:18:49,449 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:18:49,449 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 06:18:49,464 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 06:18:49,843 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2019-09-08 06:18:49,844 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:18:49,848 INFO L256 TraceCheckSpWp]: Trace formula consists of 741 conjuncts, 14 conjunts are in the unsatisfiable core [2019-09-08 06:18:49,896 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:19:00,704 INFO L134 CoverageAnalysis]: Checked inductivity of 913054 backedges. 72849 proven. 96 refuted. 0 times theorem prover too weak. 840109 trivial. 0 not checked. [2019-09-08 06:19:00,710 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:19:00,711 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 21 [2019-09-08 06:19:00,715 INFO L454 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-09-08 06:19:00,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-09-08 06:19:00,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2019-09-08 06:19:00,716 INFO L87 Difference]: Start difference. First operand 392 states and 1099 transitions. Second operand 21 states. [2019-09-08 06:19:01,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:19:01,763 INFO L93 Difference]: Finished difference Result 780 states and 2699 transitions. [2019-09-08 06:19:01,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-09-08 06:19:01,764 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 5482 [2019-09-08 06:19:01,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:19:01,774 INFO L225 Difference]: With dead ends: 780 [2019-09-08 06:19:01,774 INFO L226 Difference]: Without dead ends: 396 [2019-09-08 06:19:01,786 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5524 GetRequests, 5481 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=303, Invalid=1677, Unknown=0, NotChecked=0, Total=1980 [2019-09-08 06:19:01,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2019-09-08 06:19:01,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 358. [2019-09-08 06:19:01,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 358 states. [2019-09-08 06:19:01,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 925 transitions. [2019-09-08 06:19:01,841 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 925 transitions. Word has length 5482 [2019-09-08 06:19:01,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:19:01,842 INFO L475 AbstractCegarLoop]: Abstraction has 358 states and 925 transitions. [2019-09-08 06:19:01,842 INFO L476 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-09-08 06:19:01,842 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 925 transitions. [2019-09-08 06:19:02,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4018 [2019-09-08 06:19:02,008 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:19:02,010 INFO L399 BasicCegarLoop]: trace histogram [297, 297, 292, 292, 238, 238, 148, 148, 148, 148, 148, 148, 148, 146, 146, 146, 146, 146, 146, 146, 92, 90, 59, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:19:02,011 INFO L418 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:19:02,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:19:02,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1400441177, now seen corresponding path program 10 times [2019-09-08 06:19:02,014 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:19:02,014 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:19:02,016 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:19:02,016 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:19:02,017 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:19:03,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:19:09,613 INFO L134 CoverageAnalysis]: Checked inductivity of 488026 backedges. 2436 proven. 13791 refuted. 0 times theorem prover too weak. 471799 trivial. 0 not checked. [2019-09-08 06:19:09,613 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:19:09,614 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:19:09,626 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 06:19:10,501 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 06:19:10,501 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:19:10,519 INFO L256 TraceCheckSpWp]: Trace formula consists of 7149 conjuncts, 21 conjunts are in the unsatisfiable core [2019-09-08 06:19:10,554 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:19:16,389 INFO L134 CoverageAnalysis]: Checked inductivity of 488026 backedges. 58432 proven. 382 refuted. 0 times theorem prover too weak. 429212 trivial. 0 not checked. [2019-09-08 06:19:16,401 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:19:16,402 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 24 [2019-09-08 06:19:16,405 INFO L454 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-09-08 06:19:16,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-09-08 06:19:16,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2019-09-08 06:19:16,406 INFO L87 Difference]: Start difference. First operand 358 states and 925 transitions. Second operand 24 states. [2019-09-08 06:19:18,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:19:18,838 INFO L93 Difference]: Finished difference Result 746 states and 2319 transitions. [2019-09-08 06:19:18,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2019-09-08 06:19:18,840 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 4017 [2019-09-08 06:19:18,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:19:18,848 INFO L225 Difference]: With dead ends: 746 [2019-09-08 06:19:18,848 INFO L226 Difference]: Without dead ends: 408 [2019-09-08 06:19:18,857 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 4084 GetRequests, 4017 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1194 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=643, Invalid=4049, Unknown=0, NotChecked=0, Total=4692 [2019-09-08 06:19:18,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2019-09-08 06:19:18,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 366. [2019-09-08 06:19:18,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 366 states. [2019-09-08 06:19:18,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 759 transitions. [2019-09-08 06:19:18,891 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 759 transitions. Word has length 4017 [2019-09-08 06:19:18,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:19:18,892 INFO L475 AbstractCegarLoop]: Abstraction has 366 states and 759 transitions. [2019-09-08 06:19:18,892 INFO L476 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-09-08 06:19:18,893 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 759 transitions. [2019-09-08 06:19:19,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5026 [2019-09-08 06:19:19,066 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:19:19,068 INFO L399 BasicCegarLoop]: trace histogram [375, 375, 362, 362, 300, 296, 187, 187, 187, 187, 187, 187, 187, 181, 181, 181, 181, 181, 181, 181, 115, 113, 79, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:19:19,068 INFO L418 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:19:19,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:19:19,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1812730093, now seen corresponding path program 11 times [2019-09-08 06:19:19,069 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:19:19,069 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:19:19,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:19:19,071 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:19:19,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:19:21,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:19:31,252 INFO L134 CoverageAnalysis]: Checked inductivity of 765098 backedges. 4643 proven. 17839 refuted. 0 times theorem prover too weak. 742616 trivial. 0 not checked. [2019-09-08 06:19:31,253 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:19:31,253 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:19:31,264 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-08 06:19:31,625 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2019-09-08 06:19:31,626 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:19:31,630 INFO L256 TraceCheckSpWp]: Trace formula consists of 850 conjuncts, 25 conjunts are in the unsatisfiable core [2019-09-08 06:19:31,666 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:19:40,861 INFO L134 CoverageAnalysis]: Checked inductivity of 765098 backedges. 212207 proven. 889 refuted. 0 times theorem prover too weak. 552002 trivial. 0 not checked. [2019-09-08 06:19:40,866 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:19:40,868 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 31 [2019-09-08 06:19:40,871 INFO L454 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-09-08 06:19:40,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-09-08 06:19:40,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=802, Unknown=0, NotChecked=0, Total=930 [2019-09-08 06:19:40,871 INFO L87 Difference]: Start difference. First operand 366 states and 759 transitions. Second operand 31 states. [2019-09-08 06:19:43,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:19:43,441 INFO L93 Difference]: Finished difference Result 924 states and 2500 transitions. [2019-09-08 06:19:43,442 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2019-09-08 06:19:43,442 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 5025 [2019-09-08 06:19:43,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:19:43,456 INFO L225 Difference]: With dead ends: 924 [2019-09-08 06:19:43,457 INFO L226 Difference]: Without dead ends: 575 [2019-09-08 06:19:43,466 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5104 GetRequests, 5020 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2149 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=974, Invalid=6336, Unknown=0, NotChecked=0, Total=7310 [2019-09-08 06:19:43,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2019-09-08 06:19:43,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 376. [2019-09-08 06:19:43,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 376 states. [2019-09-08 06:19:43,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 806 transitions. [2019-09-08 06:19:43,513 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 806 transitions. Word has length 5025 [2019-09-08 06:19:43,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:19:43,515 INFO L475 AbstractCegarLoop]: Abstraction has 376 states and 806 transitions. [2019-09-08 06:19:43,515 INFO L476 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-09-08 06:19:43,515 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 806 transitions. [2019-09-08 06:19:43,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5067 [2019-09-08 06:19:43,829 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:19:43,833 INFO L399 BasicCegarLoop]: trace histogram [372, 372, 371, 371, 302, 299, 186, 186, 186, 186, 186, 186, 186, 185, 185, 185, 185, 185, 185, 185, 117, 113, 72, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:19:43,834 INFO L418 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:19:43,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:19:43,836 INFO L82 PathProgramCache]: Analyzing trace with hash 674523048, now seen corresponding path program 12 times [2019-09-08 06:19:43,836 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:19:43,836 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:19:43,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:19:43,839 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:19:43,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:19:46,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:19:57,114 INFO L134 CoverageAnalysis]: Checked inductivity of 777466 backedges. 6634 proven. 21960 refuted. 0 times theorem prover too weak. 748872 trivial. 0 not checked. [2019-09-08 06:19:57,114 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:19:57,115 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:19:57,127 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-08 06:19:57,584 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 35 check-sat command(s) [2019-09-08 06:19:57,584 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:19:57,591 INFO L256 TraceCheckSpWp]: Trace formula consists of 1286 conjuncts, 26 conjunts are in the unsatisfiable core [2019-09-08 06:19:57,627 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:20:06,142 INFO L134 CoverageAnalysis]: Checked inductivity of 777466 backedges. 4236 proven. 20511 refuted. 0 times theorem prover too weak. 752719 trivial. 0 not checked. [2019-09-08 06:20:06,148 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:20:06,149 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17] total 33 [2019-09-08 06:20:06,152 INFO L454 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-09-08 06:20:06,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-09-08 06:20:06,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=929, Unknown=0, NotChecked=0, Total=1056 [2019-09-08 06:20:06,153 INFO L87 Difference]: Start difference. First operand 376 states and 806 transitions. Second operand 33 states. [2019-09-08 06:20:09,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:20:09,134 INFO L93 Difference]: Finished difference Result 1201 states and 3533 transitions. [2019-09-08 06:20:09,135 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2019-09-08 06:20:09,135 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 5066 [2019-09-08 06:20:09,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:20:09,154 INFO L225 Difference]: With dead ends: 1201 [2019-09-08 06:20:09,154 INFO L226 Difference]: Without dead ends: 811 [2019-09-08 06:20:09,166 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5158 GetRequests, 5063 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2865 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1063, Invalid=8249, Unknown=0, NotChecked=0, Total=9312 [2019-09-08 06:20:09,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2019-09-08 06:20:09,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 567. [2019-09-08 06:20:09,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 567 states. [2019-09-08 06:20:09,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 1152 transitions. [2019-09-08 06:20:09,226 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 1152 transitions. Word has length 5066 [2019-09-08 06:20:09,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:20:09,228 INFO L475 AbstractCegarLoop]: Abstraction has 567 states and 1152 transitions. [2019-09-08 06:20:09,228 INFO L476 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-09-08 06:20:09,228 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 1152 transitions. [2019-09-08 06:20:09,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8649 [2019-09-08 06:20:09,863 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:20:09,867 INFO L399 BasicCegarLoop]: trace histogram [642, 642, 627, 627, 520, 507, 321, 321, 321, 321, 321, 321, 321, 313, 313, 313, 313, 313, 313, 313, 207, 186, 122, 120, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:20:09,867 INFO L418 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:20:09,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:20:09,870 INFO L82 PathProgramCache]: Analyzing trace with hash 102420203, now seen corresponding path program 13 times [2019-09-08 06:20:09,870 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:20:09,870 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:20:09,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:20:09,873 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:20:09,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:20:17,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:20:41,016 INFO L134 CoverageAnalysis]: Checked inductivity of 2272011 backedges. 34661 proven. 24640 refuted. 0 times theorem prover too weak. 2212710 trivial. 0 not checked. [2019-09-08 06:20:41,017 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:20:41,017 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-08 06:20:41,035 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:20:43,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:20:43,532 INFO L256 TraceCheckSpWp]: Trace formula consists of 19203 conjuncts, 30 conjunts are in the unsatisfiable core [2019-09-08 06:20:43,595 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:21:05,727 INFO L134 CoverageAnalysis]: Checked inductivity of 2272011 backedges. 5040 proven. 44758 refuted. 0 times theorem prover too weak. 2222213 trivial. 0 not checked. [2019-09-08 06:21:05,744 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:21:05,746 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 19] total 38 [2019-09-08 06:21:05,752 INFO L454 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-09-08 06:21:05,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-09-08 06:21:05,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1239, Unknown=0, NotChecked=0, Total=1406 [2019-09-08 06:21:05,753 INFO L87 Difference]: Start difference. First operand 567 states and 1152 transitions. Second operand 38 states. [2019-09-08 06:21:09,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:21:09,296 INFO L93 Difference]: Finished difference Result 1338 states and 3142 transitions. [2019-09-08 06:21:09,299 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2019-09-08 06:21:09,300 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 8648 [2019-09-08 06:21:09,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:21:09,311 INFO L225 Difference]: With dead ends: 1338 [2019-09-08 06:21:09,311 INFO L226 Difference]: Without dead ends: 764 [2019-09-08 06:21:09,323 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 8764 GetRequests, 8648 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4482 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1521, Invalid=12285, Unknown=0, NotChecked=0, Total=13806 [2019-09-08 06:21:09,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2019-09-08 06:21:09,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 629. [2019-09-08 06:21:09,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 629 states. [2019-09-08 06:21:09,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 1018 transitions. [2019-09-08 06:21:09,371 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 1018 transitions. Word has length 8648 [2019-09-08 06:21:09,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:21:09,373 INFO L475 AbstractCegarLoop]: Abstraction has 629 states and 1018 transitions. [2019-09-08 06:21:09,373 INFO L476 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-09-08 06:21:09,373 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 1018 transitions. [2019-09-08 06:21:10,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13961 [2019-09-08 06:21:10,392 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:21:10,396 INFO L399 BasicCegarLoop]: trace histogram [1036, 1036, 1013, 1013, 836, 823, 518, 518, 518, 518, 518, 518, 518, 506, 506, 506, 506, 506, 506, 506, 330, 305, 200, 190, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:21:10,397 INFO L418 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:21:10,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:21:10,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1806618837, now seen corresponding path program 14 times [2019-09-08 06:21:10,400 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:21:10,400 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:21:10,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:21:10,401 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:21:10,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:21:24,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:22:29,654 INFO L134 CoverageAnalysis]: Checked inductivity of 5928787 backedges. 11011 proven. 51143 refuted. 0 times theorem prover too weak. 5866633 trivial. 0 not checked. [2019-09-08 06:22:29,654 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:22:29,654 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:22:29,667 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 06:22:33,944 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 06:22:33,944 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:22:34,037 INFO L256 TraceCheckSpWp]: Trace formula consists of 30997 conjuncts, 32 conjunts are in the unsatisfiable core [2019-09-08 06:22:34,152 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:23:35,939 INFO L134 CoverageAnalysis]: Checked inductivity of 5928787 backedges. 8624 proven. 77932 refuted. 0 times theorem prover too weak. 5842231 trivial. 0 not checked. [2019-09-08 06:23:35,970 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:23:35,973 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 20] total 30 [2019-09-08 06:23:35,977 INFO L454 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-09-08 06:23:35,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-09-08 06:23:35,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=750, Unknown=0, NotChecked=0, Total=870 [2019-09-08 06:23:35,978 INFO L87 Difference]: Start difference. First operand 629 states and 1018 transitions. Second operand 30 states. [2019-09-08 06:23:38,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:23:38,430 INFO L93 Difference]: Finished difference Result 1389 states and 2640 transitions. [2019-09-08 06:23:38,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2019-09-08 06:23:38,431 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 13960 [2019-09-08 06:23:38,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:23:38,443 INFO L225 Difference]: With dead ends: 1389 [2019-09-08 06:23:38,443 INFO L226 Difference]: Without dead ends: 778 [2019-09-08 06:23:38,453 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 14033 GetRequests, 13946 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2052 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1094, Invalid=6738, Unknown=0, NotChecked=0, Total=7832 [2019-09-08 06:23:38,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2019-09-08 06:23:38,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 709. [2019-09-08 06:23:38,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 709 states. [2019-09-08 06:23:38,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 709 states to 709 states and 1206 transitions. [2019-09-08 06:23:38,508 INFO L78 Accepts]: Start accepts. Automaton has 709 states and 1206 transitions. Word has length 13960 [2019-09-08 06:23:38,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:23:38,512 INFO L475 AbstractCegarLoop]: Abstraction has 709 states and 1206 transitions. [2019-09-08 06:23:38,512 INFO L476 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-09-08 06:23:38,512 INFO L276 IsEmpty]: Start isEmpty. Operand 709 states and 1206 transitions. [2019-09-08 06:23:40,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18140 [2019-09-08 06:23:40,383 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:23:40,389 INFO L399 BasicCegarLoop]: trace histogram [1340, 1340, 1323, 1323, 1079, 1075, 670, 670, 670, 670, 670, 670, 670, 661, 661, 661, 661, 661, 661, 661, 418, 405, 261, 248, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:23:40,389 INFO L418 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:23:40,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:23:40,392 INFO L82 PathProgramCache]: Analyzing trace with hash -2132228512, now seen corresponding path program 15 times [2019-09-08 06:23:40,392 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:23:40,392 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:23:40,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:23:40,394 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:23:40,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:24:19,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:26:09,114 INFO L134 CoverageAnalysis]: Checked inductivity of 10014368 backedges. 65288 proven. 52155 refuted. 0 times theorem prover too weak. 9896925 trivial. 0 not checked. [2019-09-08 06:26:09,114 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:26:09,114 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:26:09,127 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 06:26:10,088 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2019-09-08 06:26:10,089 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:26:10,098 INFO L256 TraceCheckSpWp]: Trace formula consists of 849 conjuncts, 16 conjunts are in the unsatisfiable core [2019-09-08 06:26:10,225 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:27:55,709 INFO L134 CoverageAnalysis]: Checked inductivity of 10014368 backedges. 178164 proven. 145 refuted. 0 times theorem prover too weak. 9836059 trivial. 0 not checked. [2019-09-08 06:27:55,714 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:27:55,719 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 14] total 31 [2019-09-08 06:27:55,724 INFO L454 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-09-08 06:27:55,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-09-08 06:27:55,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2019-09-08 06:27:55,725 INFO L87 Difference]: Start difference. First operand 709 states and 1206 transitions. Second operand 31 states. [2019-09-08 06:27:57,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:27:57,966 INFO L93 Difference]: Finished difference Result 1829 states and 3632 transitions. [2019-09-08 06:27:57,967 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2019-09-08 06:27:57,967 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 18139 [2019-09-08 06:27:57,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:27:57,981 INFO L225 Difference]: With dead ends: 1829 [2019-09-08 06:27:57,982 INFO L226 Difference]: Without dead ends: 1093 [2019-09-08 06:27:57,989 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 18225 GetRequests, 18144 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1969 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=833, Invalid=5973, Unknown=0, NotChecked=0, Total=6806 [2019-09-08 06:27:57,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1093 states. [2019-09-08 06:27:58,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1093 to 919. [2019-09-08 06:27:58,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 919 states. [2019-09-08 06:27:58,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1648 transitions. [2019-09-08 06:27:58,066 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1648 transitions. Word has length 18139 [2019-09-08 06:27:58,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:27:58,068 INFO L475 AbstractCegarLoop]: Abstraction has 919 states and 1648 transitions. [2019-09-08 06:27:58,068 INFO L476 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-09-08 06:27:58,068 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1648 transitions. [2019-09-08 06:28:00,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23697 [2019-09-08 06:28:00,980 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:28:00,982 INFO L399 BasicCegarLoop]: trace histogram [1752, 1752, 1727, 1727, 1412, 1403, 876, 876, 876, 876, 876, 876, 876, 863, 863, 863, 863, 863, 863, 863, 540, 536, 349, 315, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:28:00,982 INFO L418 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:28:00,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:28:00,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1233771442, now seen corresponding path program 16 times [2019-09-08 06:28:00,985 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:28:00,985 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:28:00,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:28:00,986 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:28:00,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:28:51,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:31:36,370 INFO L134 CoverageAnalysis]: Checked inductivity of 17097589 backedges. 99094 proven. 64560 refuted. 0 times theorem prover too weak. 16933935 trivial. 0 not checked. [2019-09-08 06:31:36,370 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:31:36,370 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:31:36,381 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 06:31:41,945 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 06:31:41,945 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:31:42,047 INFO L256 TraceCheckSpWp]: Trace formula consists of 42172 conjuncts, 31 conjunts are in the unsatisfiable core [2019-09-08 06:31:42,171 INFO L279 TraceCheckSpWp]: Computing forward predicates...