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_label39.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 23:31:18,426 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 23:31:18,429 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 23:31:18,445 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 23:31:18,472 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-09 23:31:18,473 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-09 23:31:18,473 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-09 23:31:18,474 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-09 23:31:18,475 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-09 23:31:18,475 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-09 23:31:18,476 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-09 23:31:18,476 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-09 23:31:18,476 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 23:31:18,477 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 23:31:18,478 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 23:31:18,479 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 23:31:18,493 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 23:31:18,494 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 23:31:18,494 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 23:31:18,494 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 23:31:18,495 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 23:31:18,495 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 23:31:18,496 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 23:31:18,496 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 23:31:18,496 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 23:31:18,496 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 23:31:18,497 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 23:31:18,497 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 23:31:18,497 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 23:31:18,497 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 23:31:18,498 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 23:31:18,498 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 23:31:18,498 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 23:31:18,498 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 23:31:18,498 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 23:31:18,499 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 23:31:18,499 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 23:31:18,499 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 23:31:18,499 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 23:31:18,499 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 23:31:18,500 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 23:31:18,500 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 23:31:18,500 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 23:31:18,500 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 23:31:18,500 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 23:31:18,501 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 23:31:18,529 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 23:31:18,542 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 23:31:18,546 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 23:31:18,548 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 23:31:18,552 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 23:31:18,553 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label39.c [2019-09-09 23:31:18,626 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e725dcfdd/be318a1e05f04ef4a7f08cb0e02afa93/FLAG2c11e03e9 [2019-09-09 23:31:19,552 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 23:31:19,553 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem19_label39.c [2019-09-09 23:31:19,611 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e725dcfdd/be318a1e05f04ef4a7f08cb0e02afa93/FLAG2c11e03e9 [2019-09-09 23:31:19,955 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e725dcfdd/be318a1e05f04ef4a7f08cb0e02afa93 [2019-09-09 23:31:19,965 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 23:31:19,966 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 23:31:19,968 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 23:31:19,968 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 23:31:19,972 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 23:31:19,973 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 11:31:19" (1/1) ... [2019-09-09 23:31:19,976 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52c661a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:31:19, skipping insertion in model container [2019-09-09 23:31:19,976 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 11:31:19" (1/1) ... [2019-09-09 23:31:20,014 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 23:31:20,222 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 23:31:22,456 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 23:31:22,467 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 23:31:23,591 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 23:31:23,638 INFO L192 MainTranslator]: Completed translation [2019-09-09 23:31:23,638 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:31:23 WrapperNode [2019-09-09 23:31:23,639 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 23:31:23,640 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 23:31:23,640 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 23:31:23,641 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 23:31:23,654 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:31:23" (1/1) ... [2019-09-09 23:31:23,657 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:31:23" (1/1) ... [2019-09-09 23:31:23,744 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:31:23" (1/1) ... [2019-09-09 23:31:23,744 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:31:23" (1/1) ... [2019-09-09 23:31:23,894 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:31:23" (1/1) ... [2019-09-09 23:31:23,944 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:31:23" (1/1) ... [2019-09-09 23:31:23,989 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:31:23" (1/1) ... [2019-09-09 23:31:24,051 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 23:31:24,052 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 23:31:24,052 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 23:31:24,052 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 23:31:24,053 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:31:23" (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 23:31:24,128 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 23:31:24,128 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 23:31:24,128 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 23:31:24,128 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-09-09 23:31:24,129 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-09-09 23:31:24,129 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2019-09-09 23:31:24,129 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2019-09-09 23:31:24,129 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2019-09-09 23:31:24,129 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 23:31:24,129 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 23:31:24,130 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-09-09 23:31:24,130 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-09-09 23:31:24,130 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2019-09-09 23:31:24,130 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2019-09-09 23:31:24,130 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2019-09-09 23:31:24,131 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 23:31:24,131 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 23:31:24,131 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 23:31:24,131 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 23:31:24,132 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 23:31:24,132 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 23:31:34,942 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 23:31:34,943 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 23:31:34,947 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 11:31:34 BoogieIcfgContainer [2019-09-09 23:31:34,947 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 23:31:34,949 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 23:31:34,949 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 23:31:34,953 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 23:31:34,953 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 11:31:19" (1/3) ... [2019-09-09 23:31:34,954 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f801dcd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 11:31:34, skipping insertion in model container [2019-09-09 23:31:34,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:31:23" (2/3) ... [2019-09-09 23:31:34,955 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f801dcd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 11:31:34, skipping insertion in model container [2019-09-09 23:31:34,955 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 11:31:34" (3/3) ... [2019-09-09 23:31:34,968 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem19_label39.c [2019-09-09 23:31:34,980 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 23:31:34,991 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 23:31:35,009 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 23:31:35,046 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 23:31:35,047 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 23:31:35,047 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 23:31:35,047 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 23:31:35,047 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 23:31:35,047 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 23:31:35,048 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 23:31:35,048 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 23:31:35,109 INFO L276 IsEmpty]: Start isEmpty. Operand 1777 states. [2019-09-09 23:31:35,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-09-09 23:31:35,125 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 23:31:35,126 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] [2019-09-09 23:31:35,129 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 23:31:35,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 23:31:35,134 INFO L82 PathProgramCache]: Analyzing trace with hash -1475919748, now seen corresponding path program 1 times [2019-09-09 23:31:35,137 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 23:31:35,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:31:35,192 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 23:31:35,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:31:35,193 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 23:31:35,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 23:31:35,443 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 23:31:35,446 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 23:31:35,446 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 23:31:35,446 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 23:31:35,452 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 23:31:35,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 23:31:35,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 23:31:35,471 INFO L87 Difference]: Start difference. First operand 1777 states. Second operand 3 states. [2019-09-09 23:31:47,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 23:31:47,860 INFO L93 Difference]: Finished difference Result 3224 states and 5806 transitions. [2019-09-09 23:31:47,862 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 23:31:47,864 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 37 [2019-09-09 23:31:47,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 23:31:47,906 INFO L225 Difference]: With dead ends: 3224 [2019-09-09 23:31:47,906 INFO L226 Difference]: Without dead ends: 3156 [2019-09-09 23:31:47,908 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 23:31:47,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3156 states. [2019-09-09 23:31:48,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3156 to 3153. [2019-09-09 23:31:48,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3153 states. [2019-09-09 23:31:48,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3153 states to 3153 states and 5691 transitions. [2019-09-09 23:31:48,108 INFO L78 Accepts]: Start accepts. Automaton has 3153 states and 5691 transitions. Word has length 37 [2019-09-09 23:31:48,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 23:31:48,109 INFO L475 AbstractCegarLoop]: Abstraction has 3153 states and 5691 transitions. [2019-09-09 23:31:48,109 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 23:31:48,109 INFO L276 IsEmpty]: Start isEmpty. Operand 3153 states and 5691 transitions. [2019-09-09 23:31:48,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-09-09 23:31:48,114 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 23:31:48,115 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:31:48,115 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 23:31:48,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 23:31:48,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1086088176, now seen corresponding path program 1 times [2019-09-09 23:31:48,116 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 23:31:48,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:31:48,117 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 23:31:48,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:31:48,118 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 23:31:48,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 23:31:48,360 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 23:31:48,361 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 23:31:48,361 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 23:31:48,361 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 23:31:48,363 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 23:31:48,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 23:31:48,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 23:31:48,364 INFO L87 Difference]: Start difference. First operand 3153 states and 5691 transitions. Second operand 6 states. [2019-09-09 23:32:04,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 23:32:04,592 INFO L93 Difference]: Finished difference Result 4698 states and 7866 transitions. [2019-09-09 23:32:04,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 23:32:04,593 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 108 [2019-09-09 23:32:04,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 23:32:04,623 INFO L225 Difference]: With dead ends: 4698 [2019-09-09 23:32:04,623 INFO L226 Difference]: Without dead ends: 4698 [2019-09-09 23:32:04,624 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 23:32:04,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4698 states. [2019-09-09 23:32:04,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4698 to 4645. [2019-09-09 23:32:04,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4645 states. [2019-09-09 23:32:04,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4645 states to 4645 states and 7795 transitions. [2019-09-09 23:32:04,767 INFO L78 Accepts]: Start accepts. Automaton has 4645 states and 7795 transitions. Word has length 108 [2019-09-09 23:32:04,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 23:32:04,768 INFO L475 AbstractCegarLoop]: Abstraction has 4645 states and 7795 transitions. [2019-09-09 23:32:04,768 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 23:32:04,769 INFO L276 IsEmpty]: Start isEmpty. Operand 4645 states and 7795 transitions. [2019-09-09 23:32:04,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-09-09 23:32:04,777 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 23:32:04,778 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:32:04,779 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 23:32:04,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 23:32:04,779 INFO L82 PathProgramCache]: Analyzing trace with hash 561874843, now seen corresponding path program 1 times [2019-09-09 23:32:04,780 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 23:32:04,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:32:04,781 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 23:32:04,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:32:04,782 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 23:32:04,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 23:32:05,009 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 23:32:05,009 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 23:32:05,010 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 23:32:05,010 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 23:32:05,010 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 23:32:05,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 23:32:05,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 23:32:05,011 INFO L87 Difference]: Start difference. First operand 4645 states and 7795 transitions. Second operand 6 states. [2019-09-09 23:32:21,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 23:32:21,755 INFO L93 Difference]: Finished difference Result 9315 states and 15687 transitions. [2019-09-09 23:32:21,756 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 23:32:21,757 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 110 [2019-09-09 23:32:21,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 23:32:21,818 INFO L225 Difference]: With dead ends: 9315 [2019-09-09 23:32:21,818 INFO L226 Difference]: Without dead ends: 9315 [2019-09-09 23:32:21,819 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 23:32:21,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9315 states. [2019-09-09 23:32:22,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9315 to 9121. [2019-09-09 23:32:22,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9121 states. [2019-09-09 23:32:22,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9121 states to 9121 states and 15294 transitions. [2019-09-09 23:32:22,140 INFO L78 Accepts]: Start accepts. Automaton has 9121 states and 15294 transitions. Word has length 110 [2019-09-09 23:32:22,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 23:32:22,143 INFO L475 AbstractCegarLoop]: Abstraction has 9121 states and 15294 transitions. [2019-09-09 23:32:22,143 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 23:32:22,143 INFO L276 IsEmpty]: Start isEmpty. Operand 9121 states and 15294 transitions. [2019-09-09 23:32:22,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-09-09 23:32:22,147 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 23:32:22,147 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:32:22,148 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 23:32:22,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 23:32:22,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1106200418, now seen corresponding path program 1 times [2019-09-09 23:32:22,149 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 23:32:22,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:32:22,150 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 23:32:22,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:32:22,150 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 23:32:22,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 23:32:22,344 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 23:32:22,345 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 23:32:22,345 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-09 23:32:22,345 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 23:32:22,347 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-09 23:32:22,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-09 23:32:22,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-09 23:32:22,348 INFO L87 Difference]: Start difference. First operand 9121 states and 15294 transitions. Second operand 5 states. [2019-09-09 23:32:41,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 23:32:41,291 INFO L93 Difference]: Finished difference Result 18825 states and 28446 transitions. [2019-09-09 23:32:41,292 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-09 23:32:41,292 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 141 [2019-09-09 23:32:41,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 23:32:41,372 INFO L225 Difference]: With dead ends: 18825 [2019-09-09 23:32:41,373 INFO L226 Difference]: Without dead ends: 18825 [2019-09-09 23:32:41,374 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 23:32:41,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18825 states. [2019-09-09 23:32:41,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18825 to 18461. [2019-09-09 23:32:41,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18461 states. [2019-09-09 23:32:41,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18461 states to 18461 states and 27586 transitions. [2019-09-09 23:32:41,792 INFO L78 Accepts]: Start accepts. Automaton has 18461 states and 27586 transitions. Word has length 141 [2019-09-09 23:32:41,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 23:32:41,795 INFO L475 AbstractCegarLoop]: Abstraction has 18461 states and 27586 transitions. [2019-09-09 23:32:41,795 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-09 23:32:41,796 INFO L276 IsEmpty]: Start isEmpty. Operand 18461 states and 27586 transitions. [2019-09-09 23:32:41,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2019-09-09 23:32:41,801 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 23:32:41,802 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, 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] [2019-09-09 23:32:41,802 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 23:32:41,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 23:32:41,803 INFO L82 PathProgramCache]: Analyzing trace with hash 439321338, now seen corresponding path program 1 times [2019-09-09 23:32:41,803 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 23:32:41,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:32:41,804 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 23:32:41,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:32:41,804 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 23:32:41,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 23:32:41,951 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 60 proven. 65 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-09 23:32:41,953 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 23:32:41,953 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 23:32:41,954 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 207 with the following transitions: [2019-09-09 23:32:41,957 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], [5430], [5432], [5435], [5443], [5451], [5459], [5467], [5475], [5483], [5491], [5499], [5507], [5515], [5523], [5531], [5539], [5547], [5555], [5563], [5571], [5579], [5587], [5595], [5603], [5611], [5619], [5627], [5635], [5643], [5651], [5659], [5667], [5675], [5683], [5691], [5699], [5707], [5715], [5719], [5722], [5726], [5727], [5731], [5742], [5746], [5750], [5754], [5758], [5762], [5766], [5770], [5774], [5778], [5782], [5786], [5797], [5808], [5819], [5823], [5827], [5838], [5842], [5846], [5850], [5854], [5858], [5862], [5866], [5870], [5874], [5877], [6802], [6806], [6815], [6819], [6821], [6836], [6837], [6838], [6840], [6841] [2019-09-09 23:32:42,033 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 23:32:42,033 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 23:32:49,650 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 23:32:49,652 INFO L272 AbstractInterpreter]: Visited 103 different actions 103 times. Never merged. Never widened. Performed 250 root evaluator evaluations with a maximum evaluation depth of 14. Performed 250 inverse root evaluator evaluations with a maximum inverse evaluation depth of 14. Never found a fixpoint. Largest state had 26 variables. [2019-09-09 23:32:49,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 23:32:49,656 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 23:32:55,434 INFO L227 lantSequenceWeakener]: Weakened 185 states. On average, predicates are now at 75.57% of their original sizes. [2019-09-09 23:32:55,435 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 23:32:55,519 INFO L420 sIntCurrentIteration]: We unified 205 AI predicates to 205 [2019-09-09 23:32:55,519 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 23:32:55,520 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 23:32:55,520 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 14 [2019-09-09 23:32:55,521 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 23:32:55,521 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-09 23:32:55,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-09 23:32:55,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-09-09 23:32:55,522 INFO L87 Difference]: Start difference. First operand 18461 states and 27586 transitions. Second operand 10 states. [2019-09-09 23:36:03,877 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.