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/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem19_label30.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 23:20:23,533 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 23:20:23,535 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 23:20:23,546 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 23:20:23,573 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-09 23:20:23,573 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-09 23:20:23,574 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-09 23:20:23,575 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-09 23:20:23,576 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-09 23:20:23,576 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-09 23:20:23,577 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-09 23:20:23,577 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-09 23:20:23,577 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 23:20:23,578 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 23:20:23,579 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 23:20:23,579 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-09-09 23:20:23,593 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 23:20:23,594 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 23:20:23,594 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 23:20:23,594 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 23:20:23,595 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 23:20:23,595 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 23:20:23,595 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 23:20:23,596 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 23:20:23,596 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 23:20:23,596 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 23:20:23,597 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 23:20:23,597 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 23:20:23,597 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 23:20:23,597 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 23:20:23,597 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 23:20:23,597 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 23:20:23,598 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 23:20:23,598 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 23:20:23,598 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 23:20:23,598 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 23:20:23,598 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 23:20:23,599 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 23:20:23,599 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 23:20:23,599 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 23:20:23,599 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 23:20:23,600 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 23:20:23,600 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 23:20:23,600 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 23:20:23,600 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 23:20:23,600 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 23:20:23,628 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 23:20:23,640 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 23:20:23,644 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 23:20:23,645 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 23:20:23,645 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 23:20:23,646 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label30.c [2019-09-09 23:20:23,711 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c36894b1f/e92304d2c70b494e84aa8d60d187e390/FLAGaa0fd8d9a [2019-09-09 23:20:24,683 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 23:20:24,684 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem19_label30.c [2019-09-09 23:20:24,757 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c36894b1f/e92304d2c70b494e84aa8d60d187e390/FLAGaa0fd8d9a [2019-09-09 23:20:25,047 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c36894b1f/e92304d2c70b494e84aa8d60d187e390 [2019-09-09 23:20:25,096 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 23:20:25,098 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 23:20:25,101 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 23:20:25,101 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 23:20:25,104 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 23:20:25,105 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 11:20:25" (1/1) ... [2019-09-09 23:20:25,109 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43d096b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:20:25, skipping insertion in model container [2019-09-09 23:20:25,109 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 11:20:25" (1/1) ... [2019-09-09 23:20:25,116 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 23:20:25,354 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 23:20:27,433 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 23:20:27,444 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 23:20:28,511 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 23:20:28,562 INFO L192 MainTranslator]: Completed translation [2019-09-09 23:20:28,563 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:20:28 WrapperNode [2019-09-09 23:20:28,563 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 23:20:28,565 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 23:20:28,565 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 23:20:28,565 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 23:20:28,583 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:20:28" (1/1) ... [2019-09-09 23:20:28,584 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:20:28" (1/1) ... [2019-09-09 23:20:28,657 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:20:28" (1/1) ... [2019-09-09 23:20:28,657 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:20:28" (1/1) ... [2019-09-09 23:20:28,832 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:20:28" (1/1) ... [2019-09-09 23:20:28,872 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:20:28" (1/1) ... [2019-09-09 23:20:28,955 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:20:28" (1/1) ... [2019-09-09 23:20:29,006 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 23:20:29,006 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 23:20:29,006 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 23:20:29,007 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 23:20:29,008 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:20:28" (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 [2019-09-09 23:20:29,074 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 23:20:29,074 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 23:20:29,074 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 23:20:29,074 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-09-09 23:20:29,074 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-09-09 23:20:29,075 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2019-09-09 23:20:29,075 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2019-09-09 23:20:29,075 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2019-09-09 23:20:29,075 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 23:20:29,075 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 23:20:29,075 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-09-09 23:20:29,075 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-09-09 23:20:29,076 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2019-09-09 23:20:29,076 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2019-09-09 23:20:29,076 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2019-09-09 23:20:29,076 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 23:20:29,076 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 23:20:29,077 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 23:20:29,077 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 23:20:29,077 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 23:20:29,077 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 23:20:39,893 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 23:20:39,893 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 23:20:39,900 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 11:20:39 BoogieIcfgContainer [2019-09-09 23:20:39,902 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 23:20:39,903 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 23:20:39,903 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 23:20:39,908 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 23:20:39,909 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 11:20:25" (1/3) ... [2019-09-09 23:20:39,909 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47b653a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 11:20:39, skipping insertion in model container [2019-09-09 23:20:39,909 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:20:28" (2/3) ... [2019-09-09 23:20:39,910 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47b653a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 11:20:39, skipping insertion in model container [2019-09-09 23:20:39,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 11:20:39" (3/3) ... [2019-09-09 23:20:39,916 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem19_label30.c [2019-09-09 23:20:39,927 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 23:20:39,940 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 23:20:39,957 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 23:20:39,990 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 23:20:39,990 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 23:20:39,990 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 23:20:39,991 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 23:20:39,991 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 23:20:39,992 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 23:20:39,992 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 23:20:39,992 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 23:20:40,055 INFO L276 IsEmpty]: Start isEmpty. Operand 1777 states. [2019-09-09 23:20:40,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-09-09 23:20:40,069 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 23:20:40,070 INFO L399 BasicCegarLoop]: trace histogram [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, 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] [2019-09-09 23:20:40,073 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 23:20:40,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 23:20:40,079 INFO L82 PathProgramCache]: Analyzing trace with hash 985921090, now seen corresponding path program 1 times [2019-09-09 23:20:40,082 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 23:20:40,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:20:40,133 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 23:20:40,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:20:40,133 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 23:20:40,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 23:20:40,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 23:20:40,418 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 23:20:40,418 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 23:20:40,418 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 23:20:40,424 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 23:20:40,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 23:20:40,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 23:20:40,442 INFO L87 Difference]: Start difference. First operand 1777 states. Second operand 3 states. [2019-09-09 23:20:51,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 23:20:51,295 INFO L93 Difference]: Finished difference Result 3225 states and 5799 transitions. [2019-09-09 23:20:51,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 23:20:51,297 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 54 [2019-09-09 23:20:51,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 23:20:51,343 INFO L225 Difference]: With dead ends: 3225 [2019-09-09 23:20:51,343 INFO L226 Difference]: Without dead ends: 3157 [2019-09-09 23:20:51,347 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 23:20:51,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3157 states. [2019-09-09 23:20:51,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3157 to 3153. [2019-09-09 23:20:51,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3153 states. [2019-09-09 23:20:51,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3153 states to 3153 states and 5682 transitions. [2019-09-09 23:20:51,539 INFO L78 Accepts]: Start accepts. Automaton has 3153 states and 5682 transitions. Word has length 54 [2019-09-09 23:20:51,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 23:20:51,540 INFO L475 AbstractCegarLoop]: Abstraction has 3153 states and 5682 transitions. [2019-09-09 23:20:51,540 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 23:20:51,541 INFO L276 IsEmpty]: Start isEmpty. Operand 3153 states and 5682 transitions. [2019-09-09 23:20:51,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-09-09 23:20:51,546 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 23:20:51,546 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 23:20:51,547 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 23:20:51,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 23:20:51,547 INFO L82 PathProgramCache]: Analyzing trace with hash 537148945, now seen corresponding path program 1 times [2019-09-09 23:20:51,548 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 23:20:51,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:20:51,549 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 23:20:51,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:20:51,549 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 23:20:51,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 23:20:51,830 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 23:20:51,830 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 23:20:51,830 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 23:20:51,831 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 23:20:51,833 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 23:20:51,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 23:20:51,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 23:20:51,834 INFO L87 Difference]: Start difference. First operand 3153 states and 5682 transitions. Second operand 6 states. [2019-09-09 23:21:05,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 23:21:05,583 INFO L93 Difference]: Finished difference Result 4689 states and 7843 transitions. [2019-09-09 23:21:05,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 23:21:05,592 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 125 [2019-09-09 23:21:05,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 23:21:05,621 INFO L225 Difference]: With dead ends: 4689 [2019-09-09 23:21:05,621 INFO L226 Difference]: Without dead ends: 4689 [2019-09-09 23:21:05,622 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-09-09 23:21:05,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4689 states. [2019-09-09 23:21:05,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4689 to 4638. [2019-09-09 23:21:05,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4638 states. [2019-09-09 23:21:05,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4638 states to 4638 states and 7774 transitions. [2019-09-09 23:21:05,749 INFO L78 Accepts]: Start accepts. Automaton has 4638 states and 7774 transitions. Word has length 125 [2019-09-09 23:21:05,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 23:21:05,752 INFO L475 AbstractCegarLoop]: Abstraction has 4638 states and 7774 transitions. [2019-09-09 23:21:05,752 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 23:21:05,752 INFO L276 IsEmpty]: Start isEmpty. Operand 4638 states and 7774 transitions. [2019-09-09 23:21:05,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2019-09-09 23:21:05,762 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 23:21:05,763 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 23:21:05,763 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 23:21:05,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 23:21:05,763 INFO L82 PathProgramCache]: Analyzing trace with hash 6519311, now seen corresponding path program 1 times [2019-09-09 23:21:05,764 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 23:21:05,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:21:05,765 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 23:21:05,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:21:05,765 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 23:21:05,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 23:21:05,998 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 23:21:05,999 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 23:21:05,999 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 23:21:05,999 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 23:21:06,001 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 23:21:06,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 23:21:06,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-09 23:21:06,006 INFO L87 Difference]: Start difference. First operand 4638 states and 7774 transitions. Second operand 6 states. [2019-09-09 23:21:29,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 23:21:29,160 INFO L93 Difference]: Finished difference Result 13945 states and 20896 transitions. [2019-09-09 23:21:29,160 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-09 23:21:29,160 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 143 [2019-09-09 23:21:29,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 23:21:29,225 INFO L225 Difference]: With dead ends: 13945 [2019-09-09 23:21:29,225 INFO L226 Difference]: Without dead ends: 13945 [2019-09-09 23:21:29,226 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-09-09 23:21:29,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13945 states. [2019-09-09 23:21:29,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13945 to 13883. [2019-09-09 23:21:29,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13883 states. [2019-09-09 23:21:29,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13883 states to 13883 states and 20516 transitions. [2019-09-09 23:21:29,585 INFO L78 Accepts]: Start accepts. Automaton has 13883 states and 20516 transitions. Word has length 143 [2019-09-09 23:21:29,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 23:21:29,585 INFO L475 AbstractCegarLoop]: Abstraction has 13883 states and 20516 transitions. [2019-09-09 23:21:29,586 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 23:21:29,586 INFO L276 IsEmpty]: Start isEmpty. Operand 13883 states and 20516 transitions. [2019-09-09 23:21:29,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2019-09-09 23:21:29,589 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 23:21:29,590 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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, 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] [2019-09-09 23:21:29,590 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 23:21:29,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 23:21:29,590 INFO L82 PathProgramCache]: Analyzing trace with hash -158126148, now seen corresponding path program 1 times [2019-09-09 23:21:29,590 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 23:21:29,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:21:29,592 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 23:21:29,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:21:29,592 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 23:21:29,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 23:21:29,743 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 23:21:29,744 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 23:21:29,744 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-09 23:21:29,744 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 23:21:29,745 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-09 23:21:29,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-09 23:21:29,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-09 23:21:29,746 INFO L87 Difference]: Start difference. First operand 13883 states and 20516 transitions. Second operand 5 states. [2019-09-09 23:21:44,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 23:21:44,604 INFO L93 Difference]: Finished difference Result 29728 states and 43003 transitions. [2019-09-09 23:21:44,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-09 23:21:44,604 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 188 [2019-09-09 23:21:44,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 23:21:44,741 INFO L225 Difference]: With dead ends: 29728 [2019-09-09 23:21:44,741 INFO L226 Difference]: Without dead ends: 29728 [2019-09-09 23:21:44,743 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-09-09 23:21:44,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29728 states. [2019-09-09 23:21:45,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29728 to 28660. [2019-09-09 23:21:45,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28660 states. [2019-09-09 23:21:45,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28660 states to 28660 states and 40233 transitions. [2019-09-09 23:21:45,643 INFO L78 Accepts]: Start accepts. Automaton has 28660 states and 40233 transitions. Word has length 188 [2019-09-09 23:21:45,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 23:21:45,645 INFO L475 AbstractCegarLoop]: Abstraction has 28660 states and 40233 transitions. [2019-09-09 23:21:45,645 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-09 23:21:45,646 INFO L276 IsEmpty]: Start isEmpty. Operand 28660 states and 40233 transitions. [2019-09-09 23:21:45,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2019-09-09 23:21:45,652 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 23:21:45,652 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 23:21:45,653 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 23:21:45,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 23:21:45,654 INFO L82 PathProgramCache]: Analyzing trace with hash 1322240280, now seen corresponding path program 1 times [2019-09-09 23:21:45,654 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 23:21:45,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:21:45,655 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 23:21:45,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:21:45,656 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 23:21:45,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 23:21:45,877 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 94 proven. 68 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-09 23:21:45,877 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 23:21:45,878 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 23:21:45,879 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 208 with the following transitions: [2019-09-09 23:21:45,881 INFO L207 CegarAbsIntRunner]: [0], [1], [5227], [5234], [5242], [5250], [5258], [5266], [5274], [5282], [5290], [5298], [5306], [5314], [5322], [5330], [5338], [5346], [5354], [5362], [5370], [5378], [5386], [5394], [5402], [5410], [5418], [5426], [5434], [5442], [5450], [5458], [5466], [5474], [5482], [5490], [5498], [5506], [5514], [5522], [5530], [5538], [5546], [5554], [5562], [5566], [5568], [5571], [5579], [5587], [5595], [5603], [5611], [5619], [5627], [5635], [5643], [5651], [5659], [5667], [5675], [5683], [5691], [5699], [5707], [5715], [5727], [5731], [5742], [5745], [5746], [5750], [5754], [5758], [5762], [5766], [5770], [5774], [5778], [5781], [6802], [6806], [6815], [6819], [6821], [6836], [6837], [6838], [6840], [6841] [2019-09-09 23:21:45,942 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 23:21:45,942 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 23:21:50,762 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 23:21:50,764 INFO L272 AbstractInterpreter]: Visited 86 different actions 86 times. Never merged. Never widened. Performed 216 root evaluator evaluations with a maximum evaluation depth of 13. Performed 216 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Never found a fixpoint. Largest state had 26 variables. [2019-09-09 23:21:50,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 23:21:50,768 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 23:21:55,660 INFO L227 lantSequenceWeakener]: Weakened 188 states. On average, predicates are now at 75.94% of their original sizes. [2019-09-09 23:21:55,660 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 23:21:55,742 INFO L420 sIntCurrentIteration]: We unified 206 AI predicates to 206 [2019-09-09 23:21:55,742 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 23:21:55,743 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 23:21:55,744 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 14 [2019-09-09 23:21:55,744 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 23:21:55,745 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-09 23:21:55,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-09 23:21:55,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-09-09 23:21:55,745 INFO L87 Difference]: Start difference. First operand 28660 states and 40233 transitions. Second operand 10 states. [2019-09-09 23:24:57,925 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.