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_label16.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 23:06:12,118 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 23:06:12,120 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 23:06:12,131 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 23:06:12,158 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-09 23:06:12,159 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-09 23:06:12,159 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-09 23:06:12,160 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-09 23:06:12,161 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-09 23:06:12,161 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-09 23:06:12,162 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-09 23:06:12,162 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-09 23:06:12,162 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 23:06:12,163 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 23:06:12,164 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 23:06:12,165 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 23:06:12,180 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 23:06:12,180 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 23:06:12,181 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 23:06:12,181 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 23:06:12,182 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 23:06:12,182 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 23:06:12,182 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 23:06:12,182 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 23:06:12,182 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 23:06:12,183 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 23:06:12,183 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 23:06:12,183 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 23:06:12,184 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 23:06:12,184 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 23:06:12,184 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 23:06:12,184 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 23:06:12,184 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 23:06:12,185 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 23:06:12,185 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 23:06:12,185 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 23:06:12,185 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 23:06:12,185 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 23:06:12,186 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 23:06:12,186 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 23:06:12,186 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 23:06:12,186 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 23:06:12,186 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 23:06:12,187 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 23:06:12,187 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 23:06:12,187 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 23:06:12,217 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 23:06:12,233 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 23:06:12,236 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 23:06:12,237 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 23:06:12,237 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 23:06:12,238 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label16.c [2019-09-09 23:06:12,297 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5afda658c/061b04d7d8c84e598b4c573d03d14c4a/FLAG422b47fd8 [2019-09-09 23:06:13,115 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 23:06:13,116 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem19_label16.c [2019-09-09 23:06:13,165 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5afda658c/061b04d7d8c84e598b4c573d03d14c4a/FLAG422b47fd8 [2019-09-09 23:06:13,621 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5afda658c/061b04d7d8c84e598b4c573d03d14c4a [2019-09-09 23:06:13,631 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 23:06:13,633 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 23:06:13,634 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 23:06:13,634 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 23:06:13,638 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 23:06:13,640 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 11:06:13" (1/1) ... [2019-09-09 23:06:13,643 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f1699d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:06:13, skipping insertion in model container [2019-09-09 23:06:13,644 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 11:06:13" (1/1) ... [2019-09-09 23:06:13,652 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 23:06:13,917 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 23:06:16,332 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 23:06:16,348 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 23:06:17,513 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 23:06:17,565 INFO L192 MainTranslator]: Completed translation [2019-09-09 23:06:17,565 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:06:17 WrapperNode [2019-09-09 23:06:17,565 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 23:06:17,566 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 23:06:17,566 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 23:06:17,567 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 23:06:17,581 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:06:17" (1/1) ... [2019-09-09 23:06:17,582 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:06:17" (1/1) ... [2019-09-09 23:06:17,674 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:06:17" (1/1) ... [2019-09-09 23:06:17,675 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:06:17" (1/1) ... [2019-09-09 23:06:17,826 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:06:17" (1/1) ... [2019-09-09 23:06:17,892 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:06:17" (1/1) ... [2019-09-09 23:06:17,954 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:06:17" (1/1) ... [2019-09-09 23:06:18,052 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 23:06:18,053 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 23:06:18,053 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 23:06:18,053 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 23:06:18,054 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:06:17" (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 23:06:18,127 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 23:06:18,127 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 23:06:18,127 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 23:06:18,128 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-09-09 23:06:18,128 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-09-09 23:06:18,128 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2019-09-09 23:06:18,128 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2019-09-09 23:06:18,129 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2019-09-09 23:06:18,129 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 23:06:18,130 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 23:06:18,130 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-09-09 23:06:18,130 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-09-09 23:06:18,131 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2019-09-09 23:06:18,131 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2019-09-09 23:06:18,132 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2019-09-09 23:06:18,132 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 23:06:18,133 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 23:06:18,133 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 23:06:18,133 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 23:06:18,133 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 23:06:18,134 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 23:06:28,916 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 23:06:28,917 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 23:06:28,925 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 11:06:28 BoogieIcfgContainer [2019-09-09 23:06:28,925 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 23:06:28,929 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 23:06:28,929 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 23:06:28,935 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 23:06:28,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 11:06:13" (1/3) ... [2019-09-09 23:06:28,937 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@932936e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 11:06:28, skipping insertion in model container [2019-09-09 23:06:28,937 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:06:17" (2/3) ... [2019-09-09 23:06:28,938 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@932936e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 11:06:28, skipping insertion in model container [2019-09-09 23:06:28,939 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 11:06:28" (3/3) ... [2019-09-09 23:06:28,950 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem19_label16.c [2019-09-09 23:06:28,970 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 23:06:28,987 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 23:06:29,010 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 23:06:29,062 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 23:06:29,063 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 23:06:29,063 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 23:06:29,063 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 23:06:29,063 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 23:06:29,064 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 23:06:29,064 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 23:06:29,064 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 23:06:29,143 INFO L276 IsEmpty]: Start isEmpty. Operand 1777 states. [2019-09-09 23:06:29,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-09-09 23:06:29,265 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 23:06:29,267 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, 1, 1, 1, 1, 1] [2019-09-09 23:06:29,269 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 23:06:29,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 23:06:29,284 INFO L82 PathProgramCache]: Analyzing trace with hash 1649387796, now seen corresponding path program 1 times [2019-09-09 23:06:29,287 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 23:06:29,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:06:29,364 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 23:06:29,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:06:29,364 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 23:06:29,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 23:06:29,747 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 23:06:29,750 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 23:06:29,750 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 23:06:29,750 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 23:06:29,757 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 23:06:29,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 23:06:29,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 23:06:29,776 INFO L87 Difference]: Start difference. First operand 1777 states. Second operand 4 states. [2019-09-09 23:06:47,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 23:06:47,043 INFO L93 Difference]: Finished difference Result 4738 states and 7738 transitions. [2019-09-09 23:06:47,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 23:06:47,047 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 59 [2019-09-09 23:06:47,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 23:06:47,094 INFO L225 Difference]: With dead ends: 4738 [2019-09-09 23:06:47,095 INFO L226 Difference]: Without dead ends: 4650 [2019-09-09 23:06:47,097 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 23:06:47,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4650 states. [2019-09-09 23:06:47,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4650 to 4614. [2019-09-09 23:06:47,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4614 states. [2019-09-09 23:06:47,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4614 states to 4614 states and 7534 transitions. [2019-09-09 23:06:47,346 INFO L78 Accepts]: Start accepts. Automaton has 4614 states and 7534 transitions. Word has length 59 [2019-09-09 23:06:47,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 23:06:47,347 INFO L475 AbstractCegarLoop]: Abstraction has 4614 states and 7534 transitions. [2019-09-09 23:06:47,347 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 23:06:47,347 INFO L276 IsEmpty]: Start isEmpty. Operand 4614 states and 7534 transitions. [2019-09-09 23:06:47,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-09-09 23:06:47,353 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 23:06:47,354 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, 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] [2019-09-09 23:06:47,354 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 23:06:47,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 23:06:47,355 INFO L82 PathProgramCache]: Analyzing trace with hash -1971414264, now seen corresponding path program 1 times [2019-09-09 23:06:47,355 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 23:06:47,356 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:06:47,356 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 23:06:47,356 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:06:47,356 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 23:06:47,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 23:06:47,604 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 23:06:47,604 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 23:06:47,605 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 23:06:47,605 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 23:06:47,607 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 23:06:47,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 23:06:47,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 23:06:47,607 INFO L87 Difference]: Start difference. First operand 4614 states and 7534 transitions. Second operand 6 states. [2019-09-09 23:07:03,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 23:07:03,022 INFO L93 Difference]: Finished difference Result 9034 states and 14500 transitions. [2019-09-09 23:07:03,023 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 23:07:03,023 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 130 [2019-09-09 23:07:03,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 23:07:03,074 INFO L225 Difference]: With dead ends: 9034 [2019-09-09 23:07:03,075 INFO L226 Difference]: Without dead ends: 9034 [2019-09-09 23:07:03,076 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 23:07:03,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9034 states. [2019-09-09 23:07:03,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9034 to 8968. [2019-09-09 23:07:03,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8968 states. [2019-09-09 23:07:03,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8968 states to 8968 states and 14333 transitions. [2019-09-09 23:07:03,318 INFO L78 Accepts]: Start accepts. Automaton has 8968 states and 14333 transitions. Word has length 130 [2019-09-09 23:07:03,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 23:07:03,318 INFO L475 AbstractCegarLoop]: Abstraction has 8968 states and 14333 transitions. [2019-09-09 23:07:03,319 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 23:07:03,319 INFO L276 IsEmpty]: Start isEmpty. Operand 8968 states and 14333 transitions. [2019-09-09 23:07:03,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2019-09-09 23:07:03,323 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 23:07:03,323 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, 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] [2019-09-09 23:07:03,324 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 23:07:03,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 23:07:03,324 INFO L82 PathProgramCache]: Analyzing trace with hash -224834678, now seen corresponding path program 1 times [2019-09-09 23:07:03,324 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 23:07:03,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:07:03,325 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 23:07:03,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:07:03,326 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 23:07:03,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 23:07:03,462 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 23:07:03,463 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 23:07:03,463 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 23:07:03,463 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 23:07:03,464 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 23:07:03,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 23:07:03,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-09 23:07:03,465 INFO L87 Difference]: Start difference. First operand 8968 states and 14333 transitions. Second operand 6 states. [2019-09-09 23:07:17,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 23:07:17,661 INFO L93 Difference]: Finished difference Result 18349 states and 29028 transitions. [2019-09-09 23:07:17,663 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-09 23:07:17,664 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 140 [2019-09-09 23:07:17,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 23:07:17,746 INFO L225 Difference]: With dead ends: 18349 [2019-09-09 23:07:17,746 INFO L226 Difference]: Without dead ends: 18349 [2019-09-09 23:07:17,747 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-09-09 23:07:17,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18349 states. [2019-09-09 23:07:18,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18349 to 18120. [2019-09-09 23:07:18,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18120 states. [2019-09-09 23:07:18,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18120 states to 18120 states and 28422 transitions. [2019-09-09 23:07:18,180 INFO L78 Accepts]: Start accepts. Automaton has 18120 states and 28422 transitions. Word has length 140 [2019-09-09 23:07:18,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 23:07:18,182 INFO L475 AbstractCegarLoop]: Abstraction has 18120 states and 28422 transitions. [2019-09-09 23:07:18,182 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 23:07:18,182 INFO L276 IsEmpty]: Start isEmpty. Operand 18120 states and 28422 transitions. [2019-09-09 23:07:18,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2019-09-09 23:07:18,188 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 23:07:18,189 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, 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] [2019-09-09 23:07:18,190 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 23:07:18,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 23:07:18,190 INFO L82 PathProgramCache]: Analyzing trace with hash 1528994218, now seen corresponding path program 1 times [2019-09-09 23:07:18,190 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 23:07:18,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:07:18,191 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 23:07:18,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:07:18,192 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 23:07:18,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 23:07:18,377 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 23:07:18,378 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 23:07:18,378 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 23:07:18,378 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 23:07:18,379 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 23:07:18,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 23:07:18,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 23:07:18,380 INFO L87 Difference]: Start difference. First operand 18120 states and 28422 transitions. Second operand 6 states. [2019-09-09 23:07:31,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 23:07:31,065 INFO L93 Difference]: Finished difference Result 27417 states and 41855 transitions. [2019-09-09 23:07:31,065 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 23:07:31,066 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 173 [2019-09-09 23:07:31,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 23:07:31,166 INFO L225 Difference]: With dead ends: 27417 [2019-09-09 23:07:31,166 INFO L226 Difference]: Without dead ends: 27417 [2019-09-09 23:07:31,167 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 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 23:07:31,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27417 states. [2019-09-09 23:07:31,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27417 to 27276. [2019-09-09 23:07:31,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27276 states. [2019-09-09 23:07:31,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27276 states to 27276 states and 41289 transitions. [2019-09-09 23:07:31,723 INFO L78 Accepts]: Start accepts. Automaton has 27276 states and 41289 transitions. Word has length 173 [2019-09-09 23:07:31,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 23:07:31,725 INFO L475 AbstractCegarLoop]: Abstraction has 27276 states and 41289 transitions. [2019-09-09 23:07:31,725 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 23:07:31,726 INFO L276 IsEmpty]: Start isEmpty. Operand 27276 states and 41289 transitions. [2019-09-09 23:07:31,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2019-09-09 23:07:31,736 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 23:07:31,736 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 23:07:31,737 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 23:07:31,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 23:07:31,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1567358426, now seen corresponding path program 1 times [2019-09-09 23:07:31,737 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 23:07:31,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:07:31,738 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 23:07:31,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:07:31,739 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 23:07:31,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 23:07:32,151 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 156 proven. 134 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-09-09 23:07:32,151 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 23:07:32,151 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 23:07:32,153 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 282 with the following transitions: [2019-09-09 23:07:32,155 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], [5570], [5578], [5586], [5594], [5602], [5606], [5608], [5611], [5619], [5627], [5635], [5643], [5651], [5659], [5667], [5675], [5683], [5691], [5699], [5707], [5715], [5719], [5722], [5726], [5727], [5731], [5742], [5746], [5749], [5750], [5754], [5758], [5762], [5766], [5769], [6802], [6806], [6815], [6819], [6821], [6836], [6837], [6838], [6840], [6841] [2019-09-09 23:07:32,235 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 23:07:32,235 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 23:07:35,103 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 23:07:35,106 INFO L272 AbstractInterpreter]: Visited 84 different actions 84 times. Never merged. Never widened. Performed 212 root evaluator evaluations with a maximum evaluation depth of 12. Performed 212 inverse root evaluator evaluations with a maximum inverse evaluation depth of 12. Never found a fixpoint. Largest state had 26 variables. [2019-09-09 23:07:35,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 23:07:35,111 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 23:07:38,242 INFO L227 lantSequenceWeakener]: Weakened 255 states. On average, predicates are now at 75.77% of their original sizes. [2019-09-09 23:07:38,242 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 23:07:38,334 INFO L420 sIntCurrentIteration]: We unified 280 AI predicates to 280 [2019-09-09 23:07:38,334 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 23:07:38,335 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 23:07:38,335 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 14 [2019-09-09 23:07:38,336 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 23:07:38,336 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-09 23:07:38,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-09 23:07:38,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-09-09 23:07:38,337 INFO L87 Difference]: Start difference. First operand 27276 states and 41289 transitions. Second operand 10 states. [2019-09-09 23:10:39,777 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.