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/Problem13_label43.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 17:35:17,417 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 17:35:17,419 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 17:35:17,431 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 17:35:17,440 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-09 17:35:17,441 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-09 17:35:17,442 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-09 17:35:17,443 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-09 17:35:17,444 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-09 17:35:17,444 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-09 17:35:17,446 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-09 17:35:17,448 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-09 17:35:17,450 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-09 17:35:17,451 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-09 17:35:17,452 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-09 17:35:17,452 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-09 17:35:17,455 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-09 17:35:17,462 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 17:35:17,463 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 17:35:17,464 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 17:35:17,465 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 17:35:17,480 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 17:35:17,480 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 17:35:17,480 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 17:35:17,480 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 17:35:17,481 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 17:35:17,481 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 17:35:17,482 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 17:35:17,482 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 17:35:17,482 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 17:35:17,482 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 17:35:17,483 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 17:35:17,483 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 17:35:17,483 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 17:35:17,483 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 17:35:17,483 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 17:35:17,484 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 17:35:17,484 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 17:35:17,484 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 17:35:17,484 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 17:35:17,484 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 17:35:17,485 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 17:35:17,485 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 17:35:17,485 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 17:35:17,485 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 17:35:17,485 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 17:35:17,485 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 17:35:17,486 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 17:35:17,486 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 17:35:17,486 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 17:35:17,486 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 17:35:17,515 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 17:35:17,532 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 17:35:17,535 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 17:35:17,536 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 17:35:17,537 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 17:35:17,537 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label43.c [2019-09-09 17:35:17,600 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb87e34f8/af22e0736cdc400f858c84f7bcfb3bea/FLAGf8a1c330f [2019-09-09 17:35:18,332 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 17:35:18,333 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem13_label43.c [2019-09-09 17:35:18,374 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb87e34f8/af22e0736cdc400f858c84f7bcfb3bea/FLAGf8a1c330f [2019-09-09 17:35:18,418 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb87e34f8/af22e0736cdc400f858c84f7bcfb3bea [2019-09-09 17:35:18,432 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 17:35:18,434 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 17:35:18,437 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 17:35:18,437 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 17:35:18,441 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 17:35:18,442 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 05:35:18" (1/1) ... [2019-09-09 17:35:18,446 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5aa16274 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:35:18, skipping insertion in model container [2019-09-09 17:35:18,447 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 05:35:18" (1/1) ... [2019-09-09 17:35:18,455 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 17:35:18,627 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 17:35:20,014 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 17:35:20,026 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 17:35:20,867 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 17:35:20,903 INFO L192 MainTranslator]: Completed translation [2019-09-09 17:35:20,904 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:35:20 WrapperNode [2019-09-09 17:35:20,904 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 17:35:20,906 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 17:35:20,906 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 17:35:20,906 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 17:35:20,923 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:35:20" (1/1) ... [2019-09-09 17:35:20,926 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:35:20" (1/1) ... [2019-09-09 17:35:21,011 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:35:20" (1/1) ... [2019-09-09 17:35:21,012 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:35:20" (1/1) ... [2019-09-09 17:35:21,138 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:35:20" (1/1) ... [2019-09-09 17:35:21,177 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:35:20" (1/1) ... [2019-09-09 17:35:21,236 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:35:20" (1/1) ... [2019-09-09 17:35:21,296 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 17:35:21,297 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 17:35:21,298 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 17:35:21,298 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 17:35:21,299 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:35:20" (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 17:35:21,368 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 17:35:21,368 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 17:35:21,369 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 17:35:21,369 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-09-09 17:35:21,369 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-09-09 17:35:21,369 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2019-09-09 17:35:21,369 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 17:35:21,369 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 17:35:21,370 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-09-09 17:35:21,370 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-09-09 17:35:21,370 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2019-09-09 17:35:21,370 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 17:35:21,370 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 17:35:21,371 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 17:35:21,371 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 17:35:21,371 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 17:35:21,371 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 17:35:28,131 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 17:35:28,132 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 17:35:28,136 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 05:35:28 BoogieIcfgContainer [2019-09-09 17:35:28,137 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 17:35:28,138 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 17:35:28,138 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 17:35:28,143 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 17:35:28,143 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 05:35:18" (1/3) ... [2019-09-09 17:35:28,144 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@482340e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 05:35:28, skipping insertion in model container [2019-09-09 17:35:28,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:35:20" (2/3) ... [2019-09-09 17:35:28,145 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@482340e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 05:35:28, skipping insertion in model container [2019-09-09 17:35:28,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 05:35:28" (3/3) ... [2019-09-09 17:35:28,152 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem13_label43.c [2019-09-09 17:35:28,165 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 17:35:28,174 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 17:35:28,190 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 17:35:28,216 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 17:35:28,216 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 17:35:28,217 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 17:35:28,217 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 17:35:28,217 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 17:35:28,217 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 17:35:28,217 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 17:35:28,217 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 17:35:28,268 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states. [2019-09-09 17:35:28,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-09-09 17:35:28,280 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 17:35:28,281 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] [2019-09-09 17:35:28,283 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 17:35:28,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:35:28,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1744350321, now seen corresponding path program 1 times [2019-09-09 17:35:28,290 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 17:35:28,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:35:28,330 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 17:35:28,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:35:28,330 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 17:35:28,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 17:35:28,599 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 17:35:28,604 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 17:35:28,605 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 17:35:28,605 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 17:35:28,611 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 17:35:28,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 17:35:28,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 17:35:28,629 INFO L87 Difference]: Start difference. First operand 1119 states. Second operand 3 states. [2019-09-09 17:35:34,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 17:35:34,666 INFO L93 Difference]: Finished difference Result 1985 states and 3521 transitions. [2019-09-09 17:35:34,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 17:35:34,668 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2019-09-09 17:35:34,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 17:35:34,700 INFO L225 Difference]: With dead ends: 1985 [2019-09-09 17:35:34,701 INFO L226 Difference]: Without dead ends: 1917 [2019-09-09 17:35:34,703 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 3 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 17:35:34,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1917 states. [2019-09-09 17:35:34,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1917 to 1897. [2019-09-09 17:35:34,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1897 states. [2019-09-09 17:35:34,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1897 states to 1897 states and 3364 transitions. [2019-09-09 17:35:34,897 INFO L78 Accepts]: Start accepts. Automaton has 1897 states and 3364 transitions. Word has length 24 [2019-09-09 17:35:34,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 17:35:34,899 INFO L475 AbstractCegarLoop]: Abstraction has 1897 states and 3364 transitions. [2019-09-09 17:35:34,901 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 17:35:34,901 INFO L276 IsEmpty]: Start isEmpty. Operand 1897 states and 3364 transitions. [2019-09-09 17:35:34,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-09-09 17:35:34,914 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 17:35:34,914 INFO L399 BasicCegarLoop]: trace histogram [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] [2019-09-09 17:35:34,915 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 17:35:34,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:35:34,916 INFO L82 PathProgramCache]: Analyzing trace with hash -836411701, now seen corresponding path program 1 times [2019-09-09 17:35:34,916 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 17:35:34,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:35:34,918 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 17:35:34,918 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:35:34,918 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 17:35:35,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 17:35:35,130 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 17:35:35,131 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 17:35:35,131 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-09 17:35:35,131 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 17:35:35,133 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-09 17:35:35,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-09 17:35:35,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-09 17:35:35,134 INFO L87 Difference]: Start difference. First operand 1897 states and 3364 transitions. Second operand 5 states. [2019-09-09 17:35:45,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 17:35:45,935 INFO L93 Difference]: Finished difference Result 3678 states and 5873 transitions. [2019-09-09 17:35:45,935 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-09 17:35:45,935 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 99 [2019-09-09 17:35:45,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 17:35:45,961 INFO L225 Difference]: With dead ends: 3678 [2019-09-09 17:35:45,961 INFO L226 Difference]: Without dead ends: 3678 [2019-09-09 17:35:45,962 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 17:35:45,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3678 states. [2019-09-09 17:35:46,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3678 to 3595. [2019-09-09 17:35:46,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3595 states. [2019-09-09 17:35:46,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3595 states to 3595 states and 5740 transitions. [2019-09-09 17:35:46,108 INFO L78 Accepts]: Start accepts. Automaton has 3595 states and 5740 transitions. Word has length 99 [2019-09-09 17:35:46,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 17:35:46,109 INFO L475 AbstractCegarLoop]: Abstraction has 3595 states and 5740 transitions. [2019-09-09 17:35:46,109 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-09 17:35:46,109 INFO L276 IsEmpty]: Start isEmpty. Operand 3595 states and 5740 transitions. [2019-09-09 17:35:46,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-09-09 17:35:46,112 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 17:35:46,112 INFO L399 BasicCegarLoop]: trace histogram [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] [2019-09-09 17:35:46,112 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 17:35:46,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:35:46,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1303957124, now seen corresponding path program 1 times [2019-09-09 17:35:46,113 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 17:35:46,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:35:46,115 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 17:35:46,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:35:46,115 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 17:35:46,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 17:35:46,247 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 17:35:46,247 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 17:35:46,247 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 17:35:46,248 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 17:35:46,248 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 17:35:46,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 17:35:46,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 17:35:46,249 INFO L87 Difference]: Start difference. First operand 3595 states and 5740 transitions. Second operand 6 states. [2019-09-09 17:35:53,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 17:35:53,470 INFO L93 Difference]: Finished difference Result 7092 states and 10572 transitions. [2019-09-09 17:35:53,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 17:35:53,471 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 100 [2019-09-09 17:35:53,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 17:35:53,504 INFO L225 Difference]: With dead ends: 7092 [2019-09-09 17:35:53,505 INFO L226 Difference]: Without dead ends: 7092 [2019-09-09 17:35:53,513 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 17:35:53,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7092 states. [2019-09-09 17:35:53,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7092 to 7045. [2019-09-09 17:35:53,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7045 states. [2019-09-09 17:35:53,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7045 states to 7045 states and 10390 transitions. [2019-09-09 17:35:53,734 INFO L78 Accepts]: Start accepts. Automaton has 7045 states and 10390 transitions. Word has length 100 [2019-09-09 17:35:53,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 17:35:53,737 INFO L475 AbstractCegarLoop]: Abstraction has 7045 states and 10390 transitions. [2019-09-09 17:35:53,737 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 17:35:53,737 INFO L276 IsEmpty]: Start isEmpty. Operand 7045 states and 10390 transitions. [2019-09-09 17:35:53,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-09-09 17:35:53,747 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 17:35:53,749 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 17:35:53,749 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 17:35:53,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:35:53,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1065159861, now seen corresponding path program 1 times [2019-09-09 17:35:53,750 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 17:35:53,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:35:53,751 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 17:35:53,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:35:53,752 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 17:35:53,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 17:35:53,931 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 17:35:53,931 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 17:35:53,931 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 17:35:53,932 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 17:35:53,933 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 17:35:53,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 17:35:53,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 17:35:53,934 INFO L87 Difference]: Start difference. First operand 7045 states and 10390 transitions. Second operand 3 states. [2019-09-09 17:35:59,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 17:35:59,058 INFO L93 Difference]: Finished difference Result 13696 states and 19652 transitions. [2019-09-09 17:35:59,059 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 17:35:59,059 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 124 [2019-09-09 17:35:59,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 17:35:59,130 INFO L225 Difference]: With dead ends: 13696 [2019-09-09 17:35:59,130 INFO L226 Difference]: Without dead ends: 13696 [2019-09-09 17:35:59,131 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 17:35:59,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13696 states. [2019-09-09 17:35:59,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13696 to 13695. [2019-09-09 17:35:59,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13695 states. [2019-09-09 17:35:59,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13695 states to 13695 states and 19650 transitions. [2019-09-09 17:35:59,456 INFO L78 Accepts]: Start accepts. Automaton has 13695 states and 19650 transitions. Word has length 124 [2019-09-09 17:35:59,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 17:35:59,459 INFO L475 AbstractCegarLoop]: Abstraction has 13695 states and 19650 transitions. [2019-09-09 17:35:59,459 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 17:35:59,459 INFO L276 IsEmpty]: Start isEmpty. Operand 13695 states and 19650 transitions. [2019-09-09 17:35:59,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2019-09-09 17:35:59,462 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 17:35:59,463 INFO L399 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 17:35:59,464 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 17:35:59,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:35:59,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1862129939, now seen corresponding path program 1 times [2019-09-09 17:35:59,465 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 17:35:59,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:35:59,466 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 17:35:59,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:35:59,466 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 17:35:59,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 17:35:59,655 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 34 proven. 71 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-09 17:35:59,656 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 17:35:59,656 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 17:35:59,657 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 177 with the following transitions: [2019-09-09 17:35:59,659 INFO L207 CegarAbsIntRunner]: [0], [1], [2628], [2635], [2643], [2651], [2659], [2667], [2675], [2683], [2691], [2699], [2707], [2715], [2723], [2727], [2729], [2732], [2740], [2748], [2756], [2764], [2772], [2780], [2788], [2796], [2804], [2812], [2820], [2828], [2836], [2844], [2852], [2860], [2868], [2876], [2884], [2892], [2900], [2908], [2916], [2924], [2932], [2940], [2948], [2956], [2964], [2972], [2980], [2988], [2996], [3004], [3012], [3020], [3028], [3036], [3044], [3052], [3060], [3068], [3076], [3084], [3092], [3100], [3108], [3116], [3121], [3125], [3129], [3133], [3137], [3148], [3151], [3152], [3156], [3159], [4238], [4242], [4251], [4255], [4257], [4268], [4269], [4270], [4272], [4273] [2019-09-09 17:35:59,718 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 17:35:59,718 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 17:36:15,948 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 17:36:15,950 INFO L272 AbstractInterpreter]: Visited 82 different actions 82 times. Never merged. Never widened. Performed 123 root evaluator evaluations with a maximum evaluation depth of 17. Performed 123 inverse root evaluator evaluations with a maximum inverse evaluation depth of 17. Never found a fixpoint. Largest state had 26 variables. [2019-09-09 17:36:15,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:36:15,955 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 17:36:36,012 INFO L227 lantSequenceWeakener]: Weakened 167 states. On average, predicates are now at 70.75% of their original sizes. [2019-09-09 17:36:36,013 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 17:36:36,062 INFO L420 sIntCurrentIteration]: We unified 175 AI predicates to 175 [2019-09-09 17:36:36,062 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 17:36:36,063 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 17:36:36,063 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2019-09-09 17:36:36,064 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 17:36:36,065 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-09 17:36:36,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-09 17:36:36,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-09-09 17:36:36,065 INFO L87 Difference]: Start difference. First operand 13695 states and 19650 transitions. Second operand 7 states. [2019-09-09 17:39:26,645 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.