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 --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/loop-new/nested-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 03:03:10,961 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 03:03:10,963 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 03:03:10,981 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 03:03:10,981 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 03:03:10,983 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 03:03:10,985 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 03:03:10,994 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 03:03:10,999 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 03:03:11,002 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 03:03:11,003 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 03:03:11,004 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 03:03:11,005 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 03:03:11,006 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 03:03:11,009 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 03:03:11,010 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 03:03:11,011 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 03:03:11,012 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 03:03:11,014 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 03:03:11,018 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 03:03:11,022 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 03:03:11,025 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 03:03:11,027 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 03:03:11,028 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 03:03:11,030 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-15 03:03:11,030 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-15 03:03:11,030 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-15 03:03:11,032 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-15 03:03:11,033 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-15 03:03:11,034 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-15 03:03:11,034 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 03:03:11,035 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 03:03:11,036 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 03:03:11,037 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 03:03:11,038 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 03:03:11,038 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 03:03:11,039 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 03:03:11,039 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 03:03:11,039 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 03:03:11,040 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 03:03:11,042 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 03:03:11,042 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 03:03:11,075 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 03:03:11,075 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 03:03:11,078 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 03:03:11,079 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 03:03:11,079 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 03:03:11,079 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 03:03:11,079 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 03:03:11,079 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 03:03:11,079 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 03:03:11,080 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 03:03:11,080 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 03:03:11,080 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 03:03:11,082 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 03:03:11,082 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 03:03:11,082 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 03:03:11,082 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 03:03:11,082 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 03:03:11,083 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 03:03:11,083 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 03:03:11,083 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 03:03:11,083 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 03:03:11,084 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 03:03:11,084 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 03:03:11,084 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 03:03:11,084 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 03:03:11,084 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 03:03:11,085 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 03:03:11,085 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 03:03:11,085 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-15 03:03:11,394 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 03:03:11,416 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 03:03:11,421 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 03:03:11,423 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 03:03:11,423 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 03:03:11,424 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/nested-1.i [2019-10-15 03:03:11,497 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f52753b4/aa329de798e94cb4867ebefbdad6b771/FLAG4bd89d69f [2019-10-15 03:03:11,930 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 03:03:11,931 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/nested-1.i [2019-10-15 03:03:11,937 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f52753b4/aa329de798e94cb4867ebefbdad6b771/FLAG4bd89d69f [2019-10-15 03:03:11,952 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f52753b4/aa329de798e94cb4867ebefbdad6b771 [2019-10-15 03:03:11,963 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 03:03:11,964 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 03:03:11,965 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 03:03:11,966 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 03:03:11,969 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 03:03:11,970 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:03:11" (1/1) ... [2019-10-15 03:03:11,973 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3027a468 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:03:11, skipping insertion in model container [2019-10-15 03:03:11,974 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:03:11" (1/1) ... [2019-10-15 03:03:11,982 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 03:03:12,000 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 03:03:12,209 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:03:12,220 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 03:03:12,241 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:03:12,258 INFO L192 MainTranslator]: Completed translation [2019-10-15 03:03:12,259 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:03:12 WrapperNode [2019-10-15 03:03:12,259 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 03:03:12,260 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 03:03:12,260 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 03:03:12,260 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 03:03:12,368 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:03:12" (1/1) ... [2019-10-15 03:03:12,369 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:03:12" (1/1) ... [2019-10-15 03:03:12,374 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:03:12" (1/1) ... [2019-10-15 03:03:12,374 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:03:12" (1/1) ... [2019-10-15 03:03:12,378 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:03:12" (1/1) ... [2019-10-15 03:03:12,383 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:03:12" (1/1) ... [2019-10-15 03:03:12,384 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:03:12" (1/1) ... [2019-10-15 03:03:12,386 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 03:03:12,386 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 03:03:12,387 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 03:03:12,387 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 03:03:12,388 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:03:12" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 03:03:12,451 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 03:03:12,451 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 03:03:12,451 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 03:03:12,452 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 03:03:12,452 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 03:03:12,452 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-15 03:03:12,452 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 03:03:12,452 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 03:03:12,452 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 03:03:12,452 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 03:03:12,453 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 03:03:12,785 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 03:03:12,785 INFO L284 CfgBuilder]: Removed 2 assume(true) statements. [2019-10-15 03:03:12,787 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:03:12 BoogieIcfgContainer [2019-10-15 03:03:12,787 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 03:03:12,788 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 03:03:12,788 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 03:03:12,792 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 03:03:12,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 03:03:11" (1/3) ... [2019-10-15 03:03:12,793 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3be69ab6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:03:12, skipping insertion in model container [2019-10-15 03:03:12,793 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:03:12" (2/3) ... [2019-10-15 03:03:12,793 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3be69ab6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:03:12, skipping insertion in model container [2019-10-15 03:03:12,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:03:12" (3/3) ... [2019-10-15 03:03:12,796 INFO L109 eAbstractionObserver]: Analyzing ICFG nested-1.i [2019-10-15 03:03:12,809 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 03:03:12,817 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 03:03:12,828 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 03:03:12,853 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 03:03:12,853 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 03:03:12,853 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 03:03:12,853 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 03:03:12,854 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 03:03:12,854 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 03:03:12,854 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 03:03:12,854 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 03:03:12,874 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-10-15 03:03:12,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-15 03:03:12,880 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:03:12,881 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:03:12,883 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:03:12,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:03:12,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1228495020, now seen corresponding path program 1 times [2019-10-15 03:03:12,898 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:03:12,898 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177453360] [2019-10-15 03:03:12,898 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:03:12,899 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:03:12,899 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:03:13,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:03:13,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:03:13,075 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177453360] [2019-10-15 03:03:13,076 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:03:13,076 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 03:03:13,076 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677530008] [2019-10-15 03:03:13,081 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 03:03:13,081 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:03:13,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 03:03:13,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-15 03:03:13,097 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 4 states. [2019-10-15 03:03:13,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:03:13,192 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2019-10-15 03:03:13,192 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 03:03:13,194 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2019-10-15 03:03:13,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:03:13,200 INFO L225 Difference]: With dead ends: 37 [2019-10-15 03:03:13,200 INFO L226 Difference]: Without dead ends: 16 [2019-10-15 03:03:13,203 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-15 03:03:13,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-10-15 03:03:13,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2019-10-15 03:03:13,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-10-15 03:03:13,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2019-10-15 03:03:13,241 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2019-10-15 03:03:13,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:03:13,241 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2019-10-15 03:03:13,241 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 03:03:13,242 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2019-10-15 03:03:13,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-15 03:03:13,243 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:03:13,243 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:03:13,243 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:03:13,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:03:13,244 INFO L82 PathProgramCache]: Analyzing trace with hash 439510219, now seen corresponding path program 1 times [2019-10-15 03:03:13,244 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:03:13,245 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833906020] [2019-10-15 03:03:13,245 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:03:13,245 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:03:13,246 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:03:13,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:03:13,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:03:13,289 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833906020] [2019-10-15 03:03:13,289 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:03:13,290 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 03:03:13,290 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319043407] [2019-10-15 03:03:13,292 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 03:03:13,292 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:03:13,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 03:03:13,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-15 03:03:13,293 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 4 states. [2019-10-15 03:03:13,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:03:13,335 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2019-10-15 03:03:13,335 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 03:03:13,335 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2019-10-15 03:03:13,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:03:13,336 INFO L225 Difference]: With dead ends: 23 [2019-10-15 03:03:13,336 INFO L226 Difference]: Without dead ends: 16 [2019-10-15 03:03:13,338 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-15 03:03:13,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-10-15 03:03:13,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-10-15 03:03:13,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-10-15 03:03:13,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2019-10-15 03:03:13,344 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 14 [2019-10-15 03:03:13,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:03:13,344 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2019-10-15 03:03:13,344 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 03:03:13,344 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2019-10-15 03:03:13,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-15 03:03:13,345 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:03:13,345 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:03:13,346 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:03:13,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:03:13,346 INFO L82 PathProgramCache]: Analyzing trace with hash -1862123311, now seen corresponding path program 1 times [2019-10-15 03:03:13,347 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:03:13,347 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638990552] [2019-10-15 03:03:13,347 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:03:13,347 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:03:13,348 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:03:13,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:03:13,482 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:03:13,483 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638990552] [2019-10-15 03:03:13,483 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521247119] [2019-10-15 03:03:13,484 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:03:13,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:03:13,527 INFO L256 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 03:03:13,532 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:03:13,762 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:03:13,763 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:03:13,845 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:03:13,847 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [220268558] [2019-10-15 03:03:13,871 INFO L162 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-10-15 03:03:13,871 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:03:13,877 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:03:13,885 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:03:13,885 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:03:13,946 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 1 for LOIs [2019-10-15 03:03:14,657 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-15 03:03:14,690 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 1 for LOIs [2019-10-15 03:03:14,697 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:03:15,225 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:03:15,225 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5, 9] total 21 [2019-10-15 03:03:15,226 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187193178] [2019-10-15 03:03:15,227 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-15 03:03:15,227 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:03:15,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-15 03:03:15,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2019-10-15 03:03:15,231 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 21 states. [2019-10-15 03:03:16,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:03:16,111 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2019-10-15 03:03:16,112 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-15 03:03:16,112 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 15 [2019-10-15 03:03:16,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:03:16,113 INFO L225 Difference]: With dead ends: 32 [2019-10-15 03:03:16,113 INFO L226 Difference]: Without dead ends: 24 [2019-10-15 03:03:16,115 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=201, Invalid=855, Unknown=0, NotChecked=0, Total=1056 [2019-10-15 03:03:16,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-10-15 03:03:16,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 19. [2019-10-15 03:03:16,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-10-15 03:03:16,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2019-10-15 03:03:16,124 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 15 [2019-10-15 03:03:16,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:03:16,124 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2019-10-15 03:03:16,124 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-15 03:03:16,124 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2019-10-15 03:03:16,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-15 03:03:16,125 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:03:16,126 INFO L380 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:03:16,338 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:03:16,338 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:03:16,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:03:16,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1028404811, now seen corresponding path program 2 times [2019-10-15 03:03:16,339 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:03:16,339 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659706711] [2019-10-15 03:03:16,339 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:03:16,339 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:03:16,339 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:03:16,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:03:16,440 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:03:16,440 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659706711] [2019-10-15 03:03:16,441 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50837271] [2019-10-15 03:03:16,441 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:03:16,483 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-15 03:03:16,483 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 03:03:16,485 INFO L256 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 03:03:16,487 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:03:16,528 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 03:03:16,528 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:03:16,588 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 03:03:16,589 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1497358025] [2019-10-15 03:03:16,593 INFO L162 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-10-15 03:03:16,593 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:03:16,594 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:03:16,594 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:03:16,594 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:03:16,615 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 1 for LOIs [2019-10-15 03:03:17,056 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-15 03:03:17,079 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 1 for LOIs [2019-10-15 03:03:17,082 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:03:17,483 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:03:17,483 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5, 9] total 23 [2019-10-15 03:03:17,483 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806264056] [2019-10-15 03:03:17,484 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-15 03:03:17,484 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:03:17,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-15 03:03:17,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2019-10-15 03:03:17,485 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 23 states. [2019-10-15 03:03:20,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:03:20,209 INFO L93 Difference]: Finished difference Result 64 states and 80 transitions. [2019-10-15 03:03:20,209 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2019-10-15 03:03:20,210 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 18 [2019-10-15 03:03:20,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:03:20,211 INFO L225 Difference]: With dead ends: 64 [2019-10-15 03:03:20,212 INFO L226 Difference]: Without dead ends: 59 [2019-10-15 03:03:20,214 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1009 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=804, Invalid=3102, Unknown=0, NotChecked=0, Total=3906 [2019-10-15 03:03:20,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-10-15 03:03:20,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 51. [2019-10-15 03:03:20,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-10-15 03:03:20,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2019-10-15 03:03:20,226 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 18 [2019-10-15 03:03:20,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:03:20,227 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2019-10-15 03:03:20,227 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-15 03:03:20,227 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2019-10-15 03:03:20,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-10-15 03:03:20,228 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:03:20,228 INFO L380 BasicCegarLoop]: trace histogram [17, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:03:20,435 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:03:20,436 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:03:20,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:03:20,437 INFO L82 PathProgramCache]: Analyzing trace with hash 2137855798, now seen corresponding path program 3 times [2019-10-15 03:03:20,437 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:03:20,437 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652080414] [2019-10-15 03:03:20,438 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:03:20,438 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:03:20,438 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:03:20,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:03:21,042 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 220 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:03:21,043 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652080414] [2019-10-15 03:03:21,043 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945828349] [2019-10-15 03:03:21,043 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:03:21,110 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 03:03:21,110 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 03:03:21,111 INFO L256 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-15 03:03:21,113 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:03:21,439 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 132 proven. 40 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2019-10-15 03:03:21,439 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:03:21,754 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 127 proven. 45 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2019-10-15 03:03:21,754 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1625734539] [2019-10-15 03:03:21,756 INFO L162 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-10-15 03:03:21,756 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:03:21,757 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:03:21,757 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:03:21,757 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:03:21,767 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 1 for LOIs [2019-10-15 03:03:21,981 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-15 03:03:21,993 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 1 for LOIs [2019-10-15 03:03:21,994 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:03:22,597 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:03:22,598 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 13, 13, 9] total 53 [2019-10-15 03:03:22,598 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920139473] [2019-10-15 03:03:22,600 INFO L442 AbstractCegarLoop]: Interpolant automaton has 53 states [2019-10-15 03:03:22,600 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:03:22,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2019-10-15 03:03:22,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=2540, Unknown=0, NotChecked=0, Total=2756 [2019-10-15 03:03:22,602 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand 53 states. [2019-10-15 03:03:24,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:03:24,935 INFO L93 Difference]: Finished difference Result 98 states and 132 transitions. [2019-10-15 03:03:24,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-10-15 03:03:24,936 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 37 [2019-10-15 03:03:24,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:03:24,937 INFO L225 Difference]: With dead ends: 98 [2019-10-15 03:03:24,938 INFO L226 Difference]: Without dead ends: 61 [2019-10-15 03:03:24,941 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 82 SyntacticMatches, 6 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1364 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=669, Invalid=5337, Unknown=0, NotChecked=0, Total=6006 [2019-10-15 03:03:24,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-10-15 03:03:24,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2019-10-15 03:03:24,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-10-15 03:03:24,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2019-10-15 03:03:24,954 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 37 [2019-10-15 03:03:24,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:03:24,955 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2019-10-15 03:03:24,955 INFO L463 AbstractCegarLoop]: Interpolant automaton has 53 states. [2019-10-15 03:03:24,955 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2019-10-15 03:03:24,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-10-15 03:03:24,957 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:03:24,957 INFO L380 BasicCegarLoop]: trace histogram [40, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:03:25,160 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:03:25,161 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:03:25,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:03:25,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1178038992, now seen corresponding path program 4 times [2019-10-15 03:03:25,162 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:03:25,163 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868556693] [2019-10-15 03:03:25,163 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:03:25,163 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:03:25,164 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:03:25,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:03:25,393 INFO L134 CoverageAnalysis]: Checked inductivity of 956 backedges. 0 proven. 736 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2019-10-15 03:03:25,393 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868556693] [2019-10-15 03:03:25,394 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918521071] [2019-10-15 03:03:25,394 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:03:25,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:03:25,484 INFO L256 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 03:03:25,489 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:03:25,559 INFO L134 CoverageAnalysis]: Checked inductivity of 956 backedges. 0 proven. 736 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2019-10-15 03:03:25,560 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:03:25,666 INFO L134 CoverageAnalysis]: Checked inductivity of 956 backedges. 0 proven. 736 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2019-10-15 03:03:25,666 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [578328934] [2019-10-15 03:03:25,667 INFO L162 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-10-15 03:03:25,668 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:03:25,668 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:03:25,668 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:03:25,668 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:03:25,681 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 1 for LOIs [2019-10-15 03:03:25,880 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-15 03:03:25,888 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 1 for LOIs [2019-10-15 03:03:25,889 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:03:26,188 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:03:26,188 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 9] total 27 [2019-10-15 03:03:26,189 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728980824] [2019-10-15 03:03:26,192 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-10-15 03:03:26,193 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:03:26,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-10-15 03:03:26,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=532, Unknown=0, NotChecked=0, Total=702 [2019-10-15 03:03:26,194 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand 27 states. [2019-10-15 03:03:27,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:03:27,472 INFO L93 Difference]: Finished difference Result 138 states and 153 transitions. [2019-10-15 03:03:27,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-10-15 03:03:27,473 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 60 [2019-10-15 03:03:27,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:03:27,475 INFO L225 Difference]: With dead ends: 138 [2019-10-15 03:03:27,475 INFO L226 Difference]: Without dead ends: 133 [2019-10-15 03:03:27,477 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 710 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=614, Invalid=1836, Unknown=0, NotChecked=0, Total=2450 [2019-10-15 03:03:27,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2019-10-15 03:03:27,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2019-10-15 03:03:27,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2019-10-15 03:03:27,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 143 transitions. [2019-10-15 03:03:27,502 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 143 transitions. Word has length 60 [2019-10-15 03:03:27,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:03:27,503 INFO L462 AbstractCegarLoop]: Abstraction has 133 states and 143 transitions. [2019-10-15 03:03:27,503 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-10-15 03:03:27,503 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 143 transitions. [2019-10-15 03:03:27,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-10-15 03:03:27,508 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:03:27,508 INFO L380 BasicCegarLoop]: trace histogram [100, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:03:27,712 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:03:27,713 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:03:27,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:03:27,714 INFO L82 PathProgramCache]: Analyzing trace with hash 259705594, now seen corresponding path program 5 times [2019-10-15 03:03:27,714 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:03:27,714 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441767520] [2019-10-15 03:03:27,714 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:03:27,715 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:03:27,715 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:03:27,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:03:33,400 INFO L134 CoverageAnalysis]: Checked inductivity of 6050 backedges. 6041 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-15 03:03:33,400 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441767520] [2019-10-15 03:03:33,400 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:03:33,401 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [105] imperfect sequences [] total 105 [2019-10-15 03:03:33,401 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344553121] [2019-10-15 03:03:33,402 INFO L442 AbstractCegarLoop]: Interpolant automaton has 105 states [2019-10-15 03:03:33,402 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:03:33,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2019-10-15 03:03:33,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5257, Invalid=5663, Unknown=0, NotChecked=0, Total=10920 [2019-10-15 03:03:33,408 INFO L87 Difference]: Start difference. First operand 133 states and 143 transitions. Second operand 105 states. [2019-10-15 03:03:35,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:03:35,066 INFO L93 Difference]: Finished difference Result 5128 states and 5588 transitions. [2019-10-15 03:03:35,066 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2019-10-15 03:03:35,066 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 132 [2019-10-15 03:03:35,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:03:35,067 INFO L225 Difference]: With dead ends: 5128 [2019-10-15 03:03:35,067 INFO L226 Difference]: Without dead ends: 0 [2019-10-15 03:03:35,089 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=5261, Invalid=5869, Unknown=0, NotChecked=0, Total=11130 [2019-10-15 03:03:35,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-10-15 03:03:35,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-10-15 03:03:35,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-10-15 03:03:35,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-10-15 03:03:35,090 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 132 [2019-10-15 03:03:35,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:03:35,090 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-15 03:03:35,091 INFO L463 AbstractCegarLoop]: Interpolant automaton has 105 states. [2019-10-15 03:03:35,091 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-10-15 03:03:35,091 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-10-15 03:03:35,095 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-10-15 03:03:37,999 WARN L191 SmtUtils]: Spent 2.89 s on a formula simplification. DAG size of input: 693 DAG size of output: 692