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_label07.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 21:55:33,320 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 21:55:33,322 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 21:55:33,334 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 21:55:33,348 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-09 21:55:33,351 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-09 21:55:33,352 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-09 21:55:33,353 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-09 21:55:33,354 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-09 21:55:33,355 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-09 21:55:33,356 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-09 21:55:33,358 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-09 21:55:33,359 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-09 21:55:33,360 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-09 21:55:33,361 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-09 21:55:33,362 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-09 21:55:33,364 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-09 21:55:33,372 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 21:55:33,372 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 21:55:33,373 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 21:55:33,374 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 21:55:33,388 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 21:55:33,389 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 21:55:33,389 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 21:55:33,389 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 21:55:33,390 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 21:55:33,390 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 21:55:33,390 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 21:55:33,390 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 21:55:33,391 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 21:55:33,391 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 21:55:33,391 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 21:55:33,392 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 21:55:33,392 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 21:55:33,392 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 21:55:33,392 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 21:55:33,392 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 21:55:33,393 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 21:55:33,393 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 21:55:33,393 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 21:55:33,393 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 21:55:33,393 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 21:55:33,394 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 21:55:33,394 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 21:55:33,394 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 21:55:33,394 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 21:55:33,394 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 21:55:33,395 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 21:55:33,395 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 21:55:33,395 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 21:55:33,395 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 21:55:33,424 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 21:55:33,441 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 21:55:33,444 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 21:55:33,445 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 21:55:33,445 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 21:55:33,446 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label07.c [2019-09-09 21:55:33,507 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/415c09d47/a6fbc2ff8fd246b0b5a4698f6b5a99e6/FLAGd1f1bfea3 [2019-09-09 21:55:34,214 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 21:55:34,215 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label07.c [2019-09-09 21:55:34,243 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/415c09d47/a6fbc2ff8fd246b0b5a4698f6b5a99e6/FLAGd1f1bfea3 [2019-09-09 21:55:34,363 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/415c09d47/a6fbc2ff8fd246b0b5a4698f6b5a99e6 [2019-09-09 21:55:34,373 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 21:55:34,375 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 21:55:34,378 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 21:55:34,378 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 21:55:34,382 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 21:55:34,383 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 09:55:34" (1/1) ... [2019-09-09 21:55:34,386 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3724e0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:55:34, skipping insertion in model container [2019-09-09 21:55:34,387 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 09:55:34" (1/1) ... [2019-09-09 21:55:34,394 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 21:55:34,524 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 21:55:36,374 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 21:55:36,381 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 21:55:36,847 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 21:55:36,885 INFO L192 MainTranslator]: Completed translation [2019-09-09 21:55:36,886 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:55:36 WrapperNode [2019-09-09 21:55:36,886 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 21:55:36,887 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 21:55:36,887 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 21:55:36,887 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 21:55:36,903 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:55:36" (1/1) ... [2019-09-09 21:55:36,905 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:55:36" (1/1) ... [2019-09-09 21:55:36,970 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:55:36" (1/1) ... [2019-09-09 21:55:36,970 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:55:36" (1/1) ... [2019-09-09 21:55:37,139 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:55:36" (1/1) ... [2019-09-09 21:55:37,173 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:55:36" (1/1) ... [2019-09-09 21:55:37,200 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:55:36" (1/1) ... [2019-09-09 21:55:37,230 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 21:55:37,230 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 21:55:37,231 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 21:55:37,231 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 21:55:37,232 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:55:36" (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 21:55:37,305 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 21:55:37,305 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 21:55:37,305 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 21:55:37,306 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-09-09 21:55:37,306 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-09-09 21:55:37,306 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 21:55:37,306 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 21:55:37,306 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-09-09 21:55:37,306 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-09-09 21:55:37,307 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 21:55:37,307 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 21:55:37,307 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 21:55:37,307 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 21:55:37,307 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 21:55:37,308 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 21:55:40,921 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 21:55:40,922 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 21:55:40,923 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 09:55:40 BoogieIcfgContainer [2019-09-09 21:55:40,924 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 21:55:40,926 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 21:55:40,926 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 21:55:40,928 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 21:55:40,928 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 09:55:34" (1/3) ... [2019-09-09 21:55:40,929 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@405dfa4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 09:55:40, skipping insertion in model container [2019-09-09 21:55:40,929 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:55:36" (2/3) ... [2019-09-09 21:55:40,930 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@405dfa4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 09:55:40, skipping insertion in model container [2019-09-09 21:55:40,930 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 09:55:40" (3/3) ... [2019-09-09 21:55:40,935 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label07.c [2019-09-09 21:55:40,945 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 21:55:40,957 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 21:55:40,974 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 21:55:41,004 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 21:55:41,004 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 21:55:41,004 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 21:55:41,004 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 21:55:41,004 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 21:55:41,005 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 21:55:41,005 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 21:55:41,005 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 21:55:41,041 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states. [2019-09-09 21:55:41,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-09-09 21:55:41,054 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 21:55:41,055 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 21:55:41,057 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 21:55:41,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 21:55:41,063 INFO L82 PathProgramCache]: Analyzing trace with hash 816833170, now seen corresponding path program 1 times [2019-09-09 21:55:41,066 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 21:55:41,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:55:41,118 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 21:55:41,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:55:41,119 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 21:55:41,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 21:55:41,403 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 21:55:41,405 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 21:55:41,406 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 21:55:41,406 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 21:55:41,412 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 21:55:41,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 21:55:41,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 21:55:41,430 INFO L87 Difference]: Start difference. First operand 774 states. Second operand 3 states. [2019-09-09 21:55:45,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 21:55:45,724 INFO L93 Difference]: Finished difference Result 1480 states and 2661 transitions. [2019-09-09 21:55:45,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 21:55:45,726 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 53 [2019-09-09 21:55:45,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 21:55:45,772 INFO L225 Difference]: With dead ends: 1480 [2019-09-09 21:55:45,772 INFO L226 Difference]: Without dead ends: 1412 [2019-09-09 21:55:45,775 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 21:55:45,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1412 states. [2019-09-09 21:55:45,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1412 to 1412. [2019-09-09 21:55:45,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1412 states. [2019-09-09 21:55:45,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 2552 transitions. [2019-09-09 21:55:45,925 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 2552 transitions. Word has length 53 [2019-09-09 21:55:45,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 21:55:45,926 INFO L475 AbstractCegarLoop]: Abstraction has 1412 states and 2552 transitions. [2019-09-09 21:55:45,926 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 21:55:45,927 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 2552 transitions. [2019-09-09 21:55:45,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-09-09 21:55:45,933 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 21:55:45,933 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:55:45,933 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 21:55:45,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 21:55:45,934 INFO L82 PathProgramCache]: Analyzing trace with hash 213346646, now seen corresponding path program 1 times [2019-09-09 21:55:45,934 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 21:55:45,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:55:45,936 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 21:55:45,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:55:45,936 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 21:55:45,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 21:55:46,131 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 21:55:46,132 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 21:55:46,132 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-09 21:55:46,132 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 21:55:46,134 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-09 21:55:46,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-09 21:55:46,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-09 21:55:46,135 INFO L87 Difference]: Start difference. First operand 1412 states and 2552 transitions. Second operand 5 states. [2019-09-09 21:55:51,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 21:55:51,749 INFO L93 Difference]: Finished difference Result 2885 states and 4689 transitions. [2019-09-09 21:55:51,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 21:55:51,751 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 123 [2019-09-09 21:55:51,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 21:55:51,768 INFO L225 Difference]: With dead ends: 2885 [2019-09-09 21:55:51,768 INFO L226 Difference]: Without dead ends: 2885 [2019-09-09 21:55:51,769 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 21:55:51,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2885 states. [2019-09-09 21:55:51,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2885 to 2861. [2019-09-09 21:55:51,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2861 states. [2019-09-09 21:55:51,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2861 states to 2861 states and 4635 transitions. [2019-09-09 21:55:51,866 INFO L78 Accepts]: Start accepts. Automaton has 2861 states and 4635 transitions. Word has length 123 [2019-09-09 21:55:51,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 21:55:51,867 INFO L475 AbstractCegarLoop]: Abstraction has 2861 states and 4635 transitions. [2019-09-09 21:55:51,867 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-09 21:55:51,868 INFO L276 IsEmpty]: Start isEmpty. Operand 2861 states and 4635 transitions. [2019-09-09 21:55:51,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-09-09 21:55:51,871 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 21:55:51,871 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:55:51,871 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 21:55:51,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 21:55:51,872 INFO L82 PathProgramCache]: Analyzing trace with hash 847474275, now seen corresponding path program 1 times [2019-09-09 21:55:51,872 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 21:55:51,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:55:51,873 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 21:55:51,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:55:51,873 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 21:55:51,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 21:55:52,119 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 21:55:52,120 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 21:55:52,120 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 21:55:52,121 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 21:55:52,122 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 21:55:52,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 21:55:52,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-09 21:55:52,123 INFO L87 Difference]: Start difference. First operand 2861 states and 4635 transitions. Second operand 6 states. [2019-09-09 21:56:01,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 21:56:01,490 INFO L93 Difference]: Finished difference Result 8175 states and 12167 transitions. [2019-09-09 21:56:01,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-09 21:56:01,490 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 128 [2019-09-09 21:56:01,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 21:56:01,548 INFO L225 Difference]: With dead ends: 8175 [2019-09-09 21:56:01,549 INFO L226 Difference]: Without dead ends: 8175 [2019-09-09 21:56:01,549 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 21:56:01,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8175 states. [2019-09-09 21:56:01,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8175 to 8111. [2019-09-09 21:56:01,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8111 states. [2019-09-09 21:56:01,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8111 states to 8111 states and 11698 transitions. [2019-09-09 21:56:01,834 INFO L78 Accepts]: Start accepts. Automaton has 8111 states and 11698 transitions. Word has length 128 [2019-09-09 21:56:01,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 21:56:01,838 INFO L475 AbstractCegarLoop]: Abstraction has 8111 states and 11698 transitions. [2019-09-09 21:56:01,838 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 21:56:01,838 INFO L276 IsEmpty]: Start isEmpty. Operand 8111 states and 11698 transitions. [2019-09-09 21:56:01,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2019-09-09 21:56:01,844 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 21:56:01,844 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:56:01,844 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 21:56:01,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 21:56:01,845 INFO L82 PathProgramCache]: Analyzing trace with hash -248128349, now seen corresponding path program 1 times [2019-09-09 21:56:01,845 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 21:56:01,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:56:01,846 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 21:56:01,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:56:01,847 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 21:56:01,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 21:56:02,069 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 21:56:02,069 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 21:56:02,069 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 21:56:02,070 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 21:56:02,071 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 21:56:02,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 21:56:02,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 21:56:02,072 INFO L87 Difference]: Start difference. First operand 8111 states and 11698 transitions. Second operand 6 states. [2019-09-09 21:56:07,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 21:56:07,378 INFO L93 Difference]: Finished difference Result 11951 states and 15871 transitions. [2019-09-09 21:56:07,379 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 21:56:07,380 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 160 [2019-09-09 21:56:07,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 21:56:07,436 INFO L225 Difference]: With dead ends: 11951 [2019-09-09 21:56:07,436 INFO L226 Difference]: Without dead ends: 11951 [2019-09-09 21:56:07,437 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 21:56:07,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11951 states. [2019-09-09 21:56:07,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11951 to 11190. [2019-09-09 21:56:07,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11190 states. [2019-09-09 21:56:07,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11190 states to 11190 states and 14873 transitions. [2019-09-09 21:56:07,705 INFO L78 Accepts]: Start accepts. Automaton has 11190 states and 14873 transitions. Word has length 160 [2019-09-09 21:56:07,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 21:56:07,707 INFO L475 AbstractCegarLoop]: Abstraction has 11190 states and 14873 transitions. [2019-09-09 21:56:07,707 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 21:56:07,707 INFO L276 IsEmpty]: Start isEmpty. Operand 11190 states and 14873 transitions. [2019-09-09 21:56:07,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2019-09-09 21:56:07,712 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 21:56:07,712 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-09-09 21:56:07,712 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 21:56:07,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 21:56:07,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1539292577, now seen corresponding path program 1 times [2019-09-09 21:56:07,713 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 21:56:07,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:56:07,714 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 21:56:07,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:56:07,714 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 21:56:07,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 21:56:07,917 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 169 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 21:56:07,917 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 21:56:07,917 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 21:56:07,918 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 239 with the following transitions: [2019-09-09 21:56:07,921 INFO L207 CegarAbsIntRunner]: [0], [1], [1624], [1631], [1639], [1647], [1655], [1663], [1671], [1679], [1687], [1695], [1703], [1711], [1719], [1727], [1735], [1743], [1751], [1759], [1767], [1775], [1783], [1791], [1799], [1807], [1815], [1823], [1831], [1839], [1847], [1855], [1863], [1871], [1879], [1887], [1895], [1903], [1911], [1919], [1927], [1935], [1943], [1951], [1955], [1957], [1960], [1968], [1976], [1984], [1992], [2000], [2008], [2016], [2024], [2032], [2040], [2048], [2056], [2064], [2072], [2080], [2088], [2096], [2104], [2112], [2117], [2121], [2125], [2129], [2133], [2137], [2141], [2145], [2149], [2153], [2156], [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], [2264], [2996], [3000], [3009], [3013], [3015], [3024], [3025], [3026], [3028], [3029] [2019-09-09 21:56:07,967 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 21:56:07,968 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 21:56:14,200 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 21:56:14,202 INFO L272 AbstractInterpreter]: Visited 111 different actions 111 times. Never merged. Never widened. Performed 261 root evaluator evaluations with a maximum evaluation depth of 13. Performed 261 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Never found a fixpoint. Largest state had 24 variables. [2019-09-09 21:56:14,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 21:56:14,206 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 21:56:19,725 INFO L227 lantSequenceWeakener]: Weakened 219 states. On average, predicates are now at 78.13% of their original sizes. [2019-09-09 21:56:19,725 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 21:56:19,814 INFO L420 sIntCurrentIteration]: We unified 237 AI predicates to 237 [2019-09-09 21:56:19,814 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 21:56:19,815 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 21:56:19,816 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 14 [2019-09-09 21:56:19,816 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 21:56:19,817 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-09 21:56:19,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-09 21:56:19,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-09-09 21:56:19,817 INFO L87 Difference]: Start difference. First operand 11190 states and 14873 transitions. Second operand 10 states. [2019-09-09 21:58:09,436 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.