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_label38.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 17:32:28,347 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 17:32:28,349 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 17:32:28,360 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 17:32:28,369 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-09 17:32:28,370 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-09 17:32:28,371 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-09 17:32:28,372 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-09 17:32:28,373 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-09 17:32:28,374 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-09 17:32:28,376 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-09 17:32:28,377 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-09 17:32:28,382 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-09 17:32:28,383 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-09 17:32:28,384 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-09 17:32:28,385 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-09 17:32:28,388 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-09 17:32:28,394 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-09 17:32:28,395 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-09 17:32:28,397 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-09 17:32:28,398 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-09 17:32:28,399 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-09 17:32:28,399 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-09 17:32:28,400 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-09 17:32:28,400 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-09 17:32:28,402 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 17:32:28,403 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 17:32:28,404 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 17:32:28,405 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 17:32:28,434 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 17:32:28,434 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 17:32:28,435 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 17:32:28,435 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 17:32:28,436 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 17:32:28,436 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 17:32:28,436 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 17:32:28,436 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 17:32:28,437 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 17:32:28,437 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 17:32:28,439 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 17:32:28,439 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 17:32:28,440 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 17:32:28,440 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 17:32:28,440 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 17:32:28,440 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 17:32:28,441 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 17:32:28,441 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 17:32:28,441 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 17:32:28,441 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 17:32:28,442 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 17:32:28,442 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 17:32:28,442 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 17:32:28,442 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 17:32:28,443 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 17:32:28,443 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 17:32:28,443 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 17:32:28,443 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 17:32:28,443 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 17:32:28,443 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 17:32:28,501 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 17:32:28,520 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 17:32:28,523 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 17:32:28,525 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 17:32:28,525 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 17:32:28,526 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label38.c [2019-09-09 17:32:28,591 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c63ca77d/684fb3765380490699220529174c2cdc/FLAG36b1a95ab [2019-09-09 17:32:29,379 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 17:32:29,379 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem13_label38.c [2019-09-09 17:32:29,420 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c63ca77d/684fb3765380490699220529174c2cdc/FLAG36b1a95ab [2019-09-09 17:32:29,921 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c63ca77d/684fb3765380490699220529174c2cdc [2019-09-09 17:32:29,931 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 17:32:29,932 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 17:32:29,933 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 17:32:29,934 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 17:32:29,937 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 17:32:29,938 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 05:32:29" (1/1) ... [2019-09-09 17:32:29,941 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cb7ab14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:32:29, skipping insertion in model container [2019-09-09 17:32:29,941 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 05:32:29" (1/1) ... [2019-09-09 17:32:29,949 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 17:32:30,124 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 17:32:31,834 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 17:32:31,841 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 17:32:32,531 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 17:32:32,562 INFO L192 MainTranslator]: Completed translation [2019-09-09 17:32:32,564 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:32:32 WrapperNode [2019-09-09 17:32:32,564 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 17:32:32,565 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 17:32:32,565 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 17:32:32,565 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 17:32:32,579 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:32:32" (1/1) ... [2019-09-09 17:32:32,581 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:32:32" (1/1) ... [2019-09-09 17:32:32,673 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:32:32" (1/1) ... [2019-09-09 17:32:32,673 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:32:32" (1/1) ... [2019-09-09 17:32:32,825 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:32:32" (1/1) ... [2019-09-09 17:32:32,858 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:32:32" (1/1) ... [2019-09-09 17:32:32,898 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:32:32" (1/1) ... [2019-09-09 17:32:32,938 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 17:32:32,939 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 17:32:32,939 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 17:32:32,939 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 17:32:32,940 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:32:32" (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 17:32:33,009 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 17:32:33,009 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 17:32:33,009 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 17:32:33,010 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-09-09 17:32:33,010 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-09-09 17:32:33,010 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2019-09-09 17:32:33,010 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 17:32:33,010 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 17:32:33,011 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-09-09 17:32:33,011 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-09-09 17:32:33,011 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2019-09-09 17:32:33,011 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 17:32:33,011 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 17:32:33,012 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 17:32:33,012 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 17:32:33,012 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 17:32:33,012 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 17:32:39,892 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 17:32:39,893 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 17:32:39,899 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 05:32:39 BoogieIcfgContainer [2019-09-09 17:32:39,899 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 17:32:39,900 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 17:32:39,900 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 17:32:39,904 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 17:32:39,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 05:32:29" (1/3) ... [2019-09-09 17:32:39,905 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@556f87eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 05:32:39, skipping insertion in model container [2019-09-09 17:32:39,906 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:32:32" (2/3) ... [2019-09-09 17:32:39,906 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@556f87eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 05:32:39, skipping insertion in model container [2019-09-09 17:32:39,906 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 05:32:39" (3/3) ... [2019-09-09 17:32:39,913 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem13_label38.c [2019-09-09 17:32:39,929 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 17:32:39,939 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 17:32:39,958 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 17:32:39,989 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 17:32:39,989 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 17:32:39,990 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 17:32:39,990 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 17:32:39,990 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 17:32:39,990 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 17:32:39,990 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 17:32:39,990 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 17:32:40,037 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states. [2019-09-09 17:32:40,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-09-09 17:32:40,054 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 17:32:40,056 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 17:32:40,058 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 17:32:40,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:32:40,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1954796256, now seen corresponding path program 1 times [2019-09-09 17:32:40,067 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 17:32:40,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:32:40,119 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 17:32:40,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:32:40,120 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 17:32:40,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 17:32:40,477 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 17:32:40,480 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 17:32:40,480 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 17:32:40,480 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 17:32:40,488 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 17:32:40,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 17:32:40,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 17:32:40,512 INFO L87 Difference]: Start difference. First operand 1119 states. Second operand 3 states. [2019-09-09 17:32:46,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 17:32:46,933 INFO L93 Difference]: Finished difference Result 1971 states and 3470 transitions. [2019-09-09 17:32:46,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 17:32:46,935 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2019-09-09 17:32:46,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 17:32:46,969 INFO L225 Difference]: With dead ends: 1971 [2019-09-09 17:32:46,969 INFO L226 Difference]: Without dead ends: 1903 [2019-09-09 17:32:46,971 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 17:32:46,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1903 states. [2019-09-09 17:32:47,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1903 to 1897. [2019-09-09 17:32:47,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1897 states. [2019-09-09 17:32:47,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1897 states to 1897 states and 3341 transitions. [2019-09-09 17:32:47,134 INFO L78 Accepts]: Start accepts. Automaton has 1897 states and 3341 transitions. Word has length 65 [2019-09-09 17:32:47,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 17:32:47,135 INFO L475 AbstractCegarLoop]: Abstraction has 1897 states and 3341 transitions. [2019-09-09 17:32:47,135 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 17:32:47,136 INFO L276 IsEmpty]: Start isEmpty. Operand 1897 states and 3341 transitions. [2019-09-09 17:32:47,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-09-09 17:32:47,142 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 17:32:47,143 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-09-09 17:32:47,143 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 17:32:47,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:32:47,144 INFO L82 PathProgramCache]: Analyzing trace with hash 766329083, now seen corresponding path program 1 times [2019-09-09 17:32:47,144 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 17:32:47,145 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:32:47,145 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 17:32:47,145 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:32:47,146 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 17:32:47,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 17:32:47,400 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 17:32:47,400 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 17:32:47,400 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 17:32:47,401 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 17:32:47,402 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 17:32:47,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 17:32:47,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 17:32:47,403 INFO L87 Difference]: Start difference. First operand 1897 states and 3341 transitions. Second operand 6 states. [2019-09-09 17:32:55,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 17:32:55,941 INFO L93 Difference]: Finished difference Result 3615 states and 5738 transitions. [2019-09-09 17:32:55,942 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 17:32:55,942 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 141 [2019-09-09 17:32:55,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 17:32:55,963 INFO L225 Difference]: With dead ends: 3615 [2019-09-09 17:32:55,964 INFO L226 Difference]: Without dead ends: 3615 [2019-09-09 17:32:55,965 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 17:32:55,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3615 states. [2019-09-09 17:32:56,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3615 to 3586. [2019-09-09 17:32:56,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3586 states. [2019-09-09 17:32:56,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3586 states to 3586 states and 5675 transitions. [2019-09-09 17:32:56,064 INFO L78 Accepts]: Start accepts. Automaton has 3586 states and 5675 transitions. Word has length 141 [2019-09-09 17:32:56,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 17:32:56,065 INFO L475 AbstractCegarLoop]: Abstraction has 3586 states and 5675 transitions. [2019-09-09 17:32:56,065 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 17:32:56,065 INFO L276 IsEmpty]: Start isEmpty. Operand 3586 states and 5675 transitions. [2019-09-09 17:32:56,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2019-09-09 17:32:56,069 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 17:32:56,069 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-09-09 17:32:56,070 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 17:32:56,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:32:56,070 INFO L82 PathProgramCache]: Analyzing trace with hash 849858349, now seen corresponding path program 1 times [2019-09-09 17:32:56,070 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 17:32:56,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:32:56,071 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 17:32:56,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:32:56,072 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 17:32:56,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 17:32:56,263 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 17:32:56,263 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 17:32:56,263 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 17:32:56,263 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 17:32:56,265 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 17:32:56,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 17:32:56,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 17:32:56,266 INFO L87 Difference]: Start difference. First operand 3586 states and 5675 transitions. Second operand 6 states. [2019-09-09 17:33:03,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 17:33:03,889 INFO L93 Difference]: Finished difference Result 7095 states and 10740 transitions. [2019-09-09 17:33:03,889 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 17:33:03,889 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 160 [2019-09-09 17:33:03,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 17:33:03,927 INFO L225 Difference]: With dead ends: 7095 [2019-09-09 17:33:03,927 INFO L226 Difference]: Without dead ends: 7095 [2019-09-09 17:33:03,928 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 17:33:03,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7095 states. [2019-09-09 17:33:04,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7095 to 7042. [2019-09-09 17:33:04,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7042 states. [2019-09-09 17:33:04,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7042 states to 7042 states and 10530 transitions. [2019-09-09 17:33:04,110 INFO L78 Accepts]: Start accepts. Automaton has 7042 states and 10530 transitions. Word has length 160 [2019-09-09 17:33:04,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 17:33:04,110 INFO L475 AbstractCegarLoop]: Abstraction has 7042 states and 10530 transitions. [2019-09-09 17:33:04,111 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 17:33:04,111 INFO L276 IsEmpty]: Start isEmpty. Operand 7042 states and 10530 transitions. [2019-09-09 17:33:04,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2019-09-09 17:33:04,114 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 17:33:04,114 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-09-09 17:33:04,115 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 17:33:04,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:33:04,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1680594875, now seen corresponding path program 1 times [2019-09-09 17:33:04,115 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 17:33:04,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:33:04,116 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 17:33:04,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:33:04,116 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 17:33:04,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 17:33:04,299 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 17:33:04,299 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 17:33:04,299 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 17:33:04,299 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 17:33:04,300 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 17:33:04,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 17:33:04,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 17:33:04,301 INFO L87 Difference]: Start difference. First operand 7042 states and 10530 transitions. Second operand 6 states. [2019-09-09 17:33:12,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 17:33:12,615 INFO L93 Difference]: Finished difference Result 10950 states and 16424 transitions. [2019-09-09 17:33:12,620 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 17:33:12,620 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 172 [2019-09-09 17:33:12,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 17:33:12,669 INFO L225 Difference]: With dead ends: 10950 [2019-09-09 17:33:12,669 INFO L226 Difference]: Without dead ends: 10950 [2019-09-09 17:33:12,670 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 17:33:12,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10950 states. [2019-09-09 17:33:12,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10950 to 10780. [2019-09-09 17:33:12,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10780 states. [2019-09-09 17:33:12,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10780 states to 10780 states and 15827 transitions. [2019-09-09 17:33:12,944 INFO L78 Accepts]: Start accepts. Automaton has 10780 states and 15827 transitions. Word has length 172 [2019-09-09 17:33:12,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 17:33:12,946 INFO L475 AbstractCegarLoop]: Abstraction has 10780 states and 15827 transitions. [2019-09-09 17:33:12,946 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 17:33:12,946 INFO L276 IsEmpty]: Start isEmpty. Operand 10780 states and 15827 transitions. [2019-09-09 17:33:12,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2019-09-09 17:33:12,951 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 17:33:12,951 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, 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, 1, 1, 1, 1, 1, 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 17:33:12,952 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 17:33:12,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:33:12,952 INFO L82 PathProgramCache]: Analyzing trace with hash 1292363234, now seen corresponding path program 1 times [2019-09-09 17:33:12,952 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 17:33:12,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:33:12,953 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 17:33:12,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:33:12,954 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 17:33:12,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 17:33:13,116 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 116 proven. 67 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-09 17:33:13,116 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 17:33:13,116 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 17:33:13,118 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 227 with the following transitions: [2019-09-09 17:33:13,120 INFO L207 CegarAbsIntRunner]: [0], [1], [2628], [2635], [2643], [2651], [2659], [2667], [2675], [2683], [2691], [2699], [2707], [2715], [2723], [2731], [2739], [2747], [2755], [2763], [2771], [2779], [2787], [2795], [2803], [2811], [2819], [2827], [2835], [2843], [2851], [2859], [2867], [2875], [2883], [2891], [2899], [2907], [2915], [2923], [2931], [2939], [2947], [2955], [2963], [2971], [2979], [2987], [2995], [3003], [3011], [3019], [3027], [3035], [3043], [3051], [3055], [3057], [3060], [3068], [3076], [3084], [3092], [3100], [3108], [3116], [3121], [3125], [3128], [3129], [3133], [3137], [3148], [3152], [3156], [3160], [3164], [3168], [3179], [3183], [3187], [3191], [3195], [3199], [3203], [3207], [3218], [3222], [3225], [4238], [4242], [4251], [4255], [4257], [4268], [4269], [4270], [4272], [4273] [2019-09-09 17:33:13,193 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 17:33:13,193 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 17:33:43,602 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 17:33:43,603 INFO L272 AbstractInterpreter]: Visited 95 different actions 95 times. Never merged. Never widened. Performed 136 root evaluator evaluations with a maximum evaluation depth of 17. Performed 136 inverse root evaluator evaluations with a maximum inverse evaluation depth of 17. Never found a fixpoint. Largest state had 26 variables. [2019-09-09 17:33:43,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:33:43,607 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 17:34:17,107 INFO L227 lantSequenceWeakener]: Weakened 217 states. On average, predicates are now at 71.55% of their original sizes. [2019-09-09 17:34:17,108 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 17:34:17,153 INFO L420 sIntCurrentIteration]: We unified 225 AI predicates to 225 [2019-09-09 17:34:17,153 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 17:34:17,154 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 17:34:17,155 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 10 [2019-09-09 17:34:17,155 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 17:34:17,155 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-09 17:34:17,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-09 17:34:17,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-09-09 17:34:17,156 INFO L87 Difference]: Start difference. First operand 10780 states and 15827 transitions. Second operand 7 states. [2019-09-09 17:36:13,240 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.