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/Problem18_label00.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 21:51:18,640 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 21:51:18,642 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 21:51:18,654 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 21:51:18,679 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-09 21:51:18,680 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-09 21:51:18,683 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-09 21:51:18,685 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-09 21:51:18,686 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-09 21:51:18,687 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-09 21:51:18,689 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-09 21:51:18,694 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-09 21:51:18,698 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-09 21:51:18,700 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-09 21:51:18,703 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-09 21:51:18,704 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-09 21:51:18,706 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-09 21:51:18,717 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 21:51:18,718 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 21:51:18,719 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 21:51:18,722 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 21:51:18,755 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 21:51:18,757 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 21:51:18,758 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 21:51:18,758 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 21:51:18,759 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 21:51:18,759 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 21:51:18,759 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 21:51:18,759 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 21:51:18,759 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 21:51:18,760 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 21:51:18,762 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 21:51:18,762 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 21:51:18,762 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 21:51:18,763 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 21:51:18,763 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 21:51:18,763 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 21:51:18,763 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 21:51:18,764 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 21:51:18,764 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 21:51:18,764 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 21:51:18,764 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 21:51:18,764 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 21:51:18,765 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 21:51:18,765 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 21:51:18,765 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 21:51:18,765 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 21:51:18,765 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 21:51:18,766 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 21:51:18,766 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 21:51:18,766 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 21:51:18,817 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 21:51:18,831 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 21:51:18,835 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 21:51:18,836 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 21:51:18,837 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 21:51:18,838 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label00.c [2019-09-09 21:51:18,897 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d77a8b22/42006ee2180c468284a2dea7e81fd778/FLAG2c9864a6e [2019-09-09 21:51:19,627 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 21:51:19,628 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label00.c [2019-09-09 21:51:19,657 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d77a8b22/42006ee2180c468284a2dea7e81fd778/FLAG2c9864a6e [2019-09-09 21:51:19,912 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d77a8b22/42006ee2180c468284a2dea7e81fd778 [2019-09-09 21:51:19,923 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 21:51:19,924 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 21:51:19,925 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 21:51:19,925 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 21:51:19,929 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 21:51:19,930 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 09:51:19" (1/1) ... [2019-09-09 21:51:19,933 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76e8182 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:51:19, skipping insertion in model container [2019-09-09 21:51:19,933 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 09:51:19" (1/1) ... [2019-09-09 21:51:19,940 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 21:51:20,054 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 21:51:21,576 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 21:51:21,585 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 21:51:22,038 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 21:51:22,063 INFO L192 MainTranslator]: Completed translation [2019-09-09 21:51:22,063 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:51:22 WrapperNode [2019-09-09 21:51:22,064 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 21:51:22,064 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 21:51:22,065 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 21:51:22,065 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 21:51:22,079 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:51:22" (1/1) ... [2019-09-09 21:51:22,081 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:51:22" (1/1) ... [2019-09-09 21:51:22,154 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:51:22" (1/1) ... [2019-09-09 21:51:22,155 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:51:22" (1/1) ... [2019-09-09 21:51:22,330 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:51:22" (1/1) ... [2019-09-09 21:51:22,382 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:51:22" (1/1) ... [2019-09-09 21:51:22,421 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:51:22" (1/1) ... [2019-09-09 21:51:22,454 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 21:51:22,454 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 21:51:22,454 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 21:51:22,455 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 21:51:22,456 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:51:22" (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 21:51:22,534 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 21:51:22,534 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 21:51:22,534 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 21:51:22,534 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-09-09 21:51:22,534 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-09-09 21:51:22,535 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 21:51:22,535 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 21:51:22,536 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-09-09 21:51:22,536 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-09-09 21:51:22,536 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 21:51:22,536 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 21:51:22,538 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 21:51:22,538 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 21:51:22,539 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 21:51:22,539 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 21:51:26,247 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 21:51:26,248 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 21:51:26,255 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 09:51:26 BoogieIcfgContainer [2019-09-09 21:51:26,255 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 21:51:26,258 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 21:51:26,258 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 21:51:26,264 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 21:51:26,264 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 09:51:19" (1/3) ... [2019-09-09 21:51:26,265 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@df1d379 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 09:51:26, skipping insertion in model container [2019-09-09 21:51:26,265 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:51:22" (2/3) ... [2019-09-09 21:51:26,265 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@df1d379 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 09:51:26, skipping insertion in model container [2019-09-09 21:51:26,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 09:51:26" (3/3) ... [2019-09-09 21:51:26,267 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label00.c [2019-09-09 21:51:26,280 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 21:51:26,291 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 21:51:26,310 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 21:51:26,343 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 21:51:26,343 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 21:51:26,343 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 21:51:26,343 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 21:51:26,344 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 21:51:26,344 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 21:51:26,344 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 21:51:26,344 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 21:51:26,392 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states. [2019-09-09 21:51:26,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-09-09 21:51:26,405 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 21:51:26,406 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] [2019-09-09 21:51:26,409 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 21:51:26,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 21:51:26,415 INFO L82 PathProgramCache]: Analyzing trace with hash 760323554, now seen corresponding path program 1 times [2019-09-09 21:51:26,419 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 21:51:26,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:51:26,472 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 21:51:26,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:51:26,473 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 21:51:26,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 21:51:26,720 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 21:51:26,722 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 21:51:26,723 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 21:51:26,723 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 21:51:26,801 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 21:51:26,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 21:51:26,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 21:51:26,819 INFO L87 Difference]: Start difference. First operand 774 states. Second operand 3 states. [2019-09-09 21:51:31,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 21:51:31,045 INFO L93 Difference]: Finished difference Result 1480 states and 2661 transitions. [2019-09-09 21:51:31,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 21:51:31,046 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2019-09-09 21:51:31,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 21:51:31,086 INFO L225 Difference]: With dead ends: 1480 [2019-09-09 21:51:31,086 INFO L226 Difference]: Without dead ends: 1412 [2019-09-09 21:51:31,089 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 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 21:51:31,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1412 states. [2019-09-09 21:51:31,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1412 to 1412. [2019-09-09 21:51:31,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1412 states. [2019-09-09 21:51:31,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 2552 transitions. [2019-09-09 21:51:31,229 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 2552 transitions. Word has length 25 [2019-09-09 21:51:31,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 21:51:31,230 INFO L475 AbstractCegarLoop]: Abstraction has 1412 states and 2552 transitions. [2019-09-09 21:51:31,230 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 21:51:31,230 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 2552 transitions. [2019-09-09 21:51:31,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-09-09 21:51:31,237 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 21:51:31,237 INFO L399 BasicCegarLoop]: trace histogram [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] [2019-09-09 21:51:31,238 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 21:51:31,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 21:51:31,239 INFO L82 PathProgramCache]: Analyzing trace with hash 277822566, now seen corresponding path program 1 times [2019-09-09 21:51:31,239 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 21:51:31,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:51:31,241 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 21:51:31,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:51:31,241 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 21:51:31,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 21:51:31,506 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 21:51:31,507 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 21:51:31,507 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-09 21:51:31,507 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 21:51:31,510 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-09 21:51:31,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-09 21:51:31,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-09 21:51:31,511 INFO L87 Difference]: Start difference. First operand 1412 states and 2552 transitions. Second operand 5 states. [2019-09-09 21:51:37,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 21:51:37,148 INFO L93 Difference]: Finished difference Result 2885 states and 4689 transitions. [2019-09-09 21:51:37,148 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 21:51:37,149 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 95 [2019-09-09 21:51:37,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 21:51:37,166 INFO L225 Difference]: With dead ends: 2885 [2019-09-09 21:51:37,166 INFO L226 Difference]: Without dead ends: 2885 [2019-09-09 21:51:37,167 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 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 21:51:37,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2885 states. [2019-09-09 21:51:37,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2885 to 2861. [2019-09-09 21:51:37,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2861 states. [2019-09-09 21:51:37,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2861 states to 2861 states and 4635 transitions. [2019-09-09 21:51:37,243 INFO L78 Accepts]: Start accepts. Automaton has 2861 states and 4635 transitions. Word has length 95 [2019-09-09 21:51:37,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 21:51:37,243 INFO L475 AbstractCegarLoop]: Abstraction has 2861 states and 4635 transitions. [2019-09-09 21:51:37,244 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-09 21:51:37,244 INFO L276 IsEmpty]: Start isEmpty. Operand 2861 states and 4635 transitions. [2019-09-09 21:51:37,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-09-09 21:51:37,246 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 21:51:37,246 INFO L399 BasicCegarLoop]: trace histogram [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] [2019-09-09 21:51:37,246 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 21:51:37,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 21:51:37,247 INFO L82 PathProgramCache]: Analyzing trace with hash 268921715, now seen corresponding path program 1 times [2019-09-09 21:51:37,247 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 21:51:37,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:51:37,248 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 21:51:37,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:51:37,248 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 21:51:37,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 21:51:37,375 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 21:51:37,376 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 21:51:37,376 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 21:51:37,376 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 21:51:37,377 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 21:51:37,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 21:51:37,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-09 21:51:37,378 INFO L87 Difference]: Start difference. First operand 2861 states and 4635 transitions. Second operand 6 states. [2019-09-09 21:51:46,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 21:51:46,661 INFO L93 Difference]: Finished difference Result 8177 states and 12170 transitions. [2019-09-09 21:51:46,662 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-09 21:51:46,662 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 100 [2019-09-09 21:51:46,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 21:51:46,721 INFO L225 Difference]: With dead ends: 8177 [2019-09-09 21:51:46,722 INFO L226 Difference]: Without dead ends: 8177 [2019-09-09 21:51:46,723 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 21:51:46,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8177 states. [2019-09-09 21:51:47,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8177 to 8111. [2019-09-09 21:51:47,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8111 states. [2019-09-09 21:51:47,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8111 states to 8111 states and 11700 transitions. [2019-09-09 21:51:47,033 INFO L78 Accepts]: Start accepts. Automaton has 8111 states and 11700 transitions. Word has length 100 [2019-09-09 21:51:47,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 21:51:47,033 INFO L475 AbstractCegarLoop]: Abstraction has 8111 states and 11700 transitions. [2019-09-09 21:51:47,034 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 21:51:47,034 INFO L276 IsEmpty]: Start isEmpty. Operand 8111 states and 11700 transitions. [2019-09-09 21:51:47,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2019-09-09 21:51:47,036 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 21:51:47,036 INFO L399 BasicCegarLoop]: trace histogram [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] [2019-09-09 21:51:47,037 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 21:51:47,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 21:51:47,037 INFO L82 PathProgramCache]: Analyzing trace with hash -2004812481, now seen corresponding path program 1 times [2019-09-09 21:51:47,037 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 21:51:47,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:51:47,038 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 21:51:47,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:51:47,039 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 21:51:47,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 21:51:47,118 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 21:51:47,118 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 21:51:47,119 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 21:51:47,119 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 21:51:47,119 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 21:51:47,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 21:51:47,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 21:51:47,120 INFO L87 Difference]: Start difference. First operand 8111 states and 11700 transitions. Second operand 4 states. [2019-09-09 21:51:53,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 21:51:53,829 INFO L93 Difference]: Finished difference Result 21059 states and 30741 transitions. [2019-09-09 21:51:53,830 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 21:51:53,830 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 122 [2019-09-09 21:51:53,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 21:51:53,949 INFO L225 Difference]: With dead ends: 21059 [2019-09-09 21:51:53,950 INFO L226 Difference]: Without dead ends: 21059 [2019-09-09 21:51:53,950 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 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 21:51:53,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21059 states. [2019-09-09 21:51:54,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21059 to 21059. [2019-09-09 21:51:54,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21059 states. [2019-09-09 21:51:54,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21059 states to 21059 states and 30741 transitions. [2019-09-09 21:51:54,614 INFO L78 Accepts]: Start accepts. Automaton has 21059 states and 30741 transitions. Word has length 122 [2019-09-09 21:51:54,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 21:51:54,615 INFO L475 AbstractCegarLoop]: Abstraction has 21059 states and 30741 transitions. [2019-09-09 21:51:54,615 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 21:51:54,615 INFO L276 IsEmpty]: Start isEmpty. Operand 21059 states and 30741 transitions. [2019-09-09 21:51:54,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2019-09-09 21:51:54,627 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 21:51:54,627 INFO L399 BasicCegarLoop]: trace histogram [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, 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] [2019-09-09 21:51:54,628 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 21:51:54,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 21:51:54,628 INFO L82 PathProgramCache]: Analyzing trace with hash 713722098, now seen corresponding path program 1 times [2019-09-09 21:51:54,629 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 21:51:54,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:51:54,630 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 21:51:54,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:51:54,630 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 21:51:54,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 21:51:54,848 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 36 proven. 65 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-09 21:51:54,849 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 21:51:54,849 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 21:51:54,850 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 220 with the following transitions: [2019-09-09 21:51:54,853 INFO L207 CegarAbsIntRunner]: [0], [1], [1624], [1631], [1639], [1647], [1655], [1663], [1671], [1679], [1687], [1695], [1703], [1711], [1719], [1727], [1731], [1733], [1736], [1744], [1752], [1760], [1768], [1776], [1784], [1792], [1800], [1808], [1816], [1824], [1832], [1840], [1848], [1856], [1864], [1872], [1880], [1888], [1896], [1904], [1912], [1920], [1928], [1936], [1944], [1952], [1960], [1968], [1976], [1984], [1992], [2000], [2008], [2016], [2024], [2032], [2040], [2048], [2056], [2064], [2072], [2080], [2088], [2096], [2104], [2112], [2116], [2117], [2121], [2125], [2129], [2133], [2137], [2141], [2145], [2149], [2153], [2157], [2161], [2165], [2169], [2173], [2177], [2181], [2185], [2189], [2193], [2197], [2201], [2205], [2209], [2213], [2217], [2221], [2225], [2229], [2233], [2237], [2241], [2245], [2249], [2253], [2257], [2261], [2265], [2269], [2273], [2277], [2281], [2285], [2289], [2293], [2297], [2301], [2305], [2309], [2313], [2317], [2321], [2325], [2329], [2333], [2337], [2340], [2996], [3000], [3009], [3013], [3015], [3024], [3025], [3026], [3028], [3029] [2019-09-09 21:51:54,947 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 21:51:54,948 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 21:52:03,069 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 21:52:03,073 INFO L272 AbstractInterpreter]: Visited 130 different actions 130 times. Never merged. Never widened. Performed 299 root evaluator evaluations with a maximum evaluation depth of 13. Performed 299 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Never found a fixpoint. Largest state had 24 variables. [2019-09-09 21:52:03,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 21:52:03,078 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 21:52:08,518 INFO L227 lantSequenceWeakener]: Weakened 200 states. On average, predicates are now at 77.57% of their original sizes. [2019-09-09 21:52:08,519 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 21:52:08,582 INFO L420 sIntCurrentIteration]: We unified 218 AI predicates to 218 [2019-09-09 21:52:08,582 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 21:52:08,583 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 21:52:08,583 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [5] total 13 [2019-09-09 21:52:08,583 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 21:52:08,584 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-09 21:52:08,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-09 21:52:08,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-09-09 21:52:08,585 INFO L87 Difference]: Start difference. First operand 21059 states and 30741 transitions. Second operand 10 states. [2019-09-09 21:53:50,488 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.