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/Problem17_label41.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 21:29:53,494 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 21:29:53,500 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 21:29:53,515 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 21:29:53,524 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-09 21:29:53,525 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-09 21:29:53,526 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-09 21:29:53,527 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-09 21:29:53,528 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-09 21:29:53,529 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-09 21:29:53,531 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-09 21:29:53,533 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-09 21:29:53,534 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-09 21:29:53,535 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-09 21:29:53,536 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-09 21:29:53,537 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-09 21:29:53,540 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-09 21:29:53,543 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-09 21:29:53,544 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-09 21:29:53,544 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-09 21:29:53,545 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-09 21:29:53,546 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-09 21:29:53,546 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-09 21:29:53,547 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-09 21:29:53,547 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-09 21:29:53,547 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 21:29:53,548 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 21:29:53,549 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 21:29:53,550 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 21:29:53,574 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 21:29:53,575 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 21:29:53,575 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 21:29:53,575 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 21:29:53,576 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 21:29:53,576 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 21:29:53,576 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 21:29:53,576 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 21:29:53,577 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 21:29:53,577 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 21:29:53,578 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 21:29:53,578 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 21:29:53,578 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 21:29:53,578 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 21:29:53,578 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 21:29:53,579 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 21:29:53,579 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 21:29:53,579 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 21:29:53,579 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 21:29:53,579 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 21:29:53,580 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 21:29:53,580 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 21:29:53,580 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 21:29:53,580 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 21:29:53,580 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 21:29:53,581 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 21:29:53,581 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 21:29:53,581 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 21:29:53,581 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 21:29:53,581 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 21:29:53,609 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 21:29:53,622 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 21:29:53,625 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 21:29:53,627 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 21:29:53,627 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 21:29:53,628 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label41.c [2019-09-09 21:29:53,689 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4be664906/a8527b90e544401da5be983487738d6e/FLAGb224f89d5 [2019-09-09 21:29:54,405 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 21:29:54,406 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem17_label41.c [2019-09-09 21:29:54,438 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4be664906/a8527b90e544401da5be983487738d6e/FLAGb224f89d5 [2019-09-09 21:29:54,511 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4be664906/a8527b90e544401da5be983487738d6e [2019-09-09 21:29:54,522 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 21:29:54,523 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 21:29:54,524 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 21:29:54,524 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 21:29:54,528 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 21:29:54,530 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 09:29:54" (1/1) ... [2019-09-09 21:29:54,533 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e4db4b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:29:54, skipping insertion in model container [2019-09-09 21:29:54,533 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 09:29:54" (1/1) ... [2019-09-09 21:29:54,540 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 21:29:54,644 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 21:29:55,731 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 21:29:55,743 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 21:29:56,160 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 21:29:56,186 INFO L192 MainTranslator]: Completed translation [2019-09-09 21:29:56,187 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:29:56 WrapperNode [2019-09-09 21:29:56,187 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 21:29:56,188 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 21:29:56,188 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 21:29:56,188 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 21:29:56,203 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:29:56" (1/1) ... [2019-09-09 21:29:56,205 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:29:56" (1/1) ... [2019-09-09 21:29:56,262 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:29:56" (1/1) ... [2019-09-09 21:29:56,263 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:29:56" (1/1) ... [2019-09-09 21:29:56,383 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:29:56" (1/1) ... [2019-09-09 21:29:56,426 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:29:56" (1/1) ... [2019-09-09 21:29:56,454 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:29:56" (1/1) ... [2019-09-09 21:29:56,475 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 21:29:56,476 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 21:29:56,476 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 21:29:56,476 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 21:29:56,477 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:29:56" (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 21:29:56,544 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 21:29:56,544 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 21:29:56,545 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 21:29:56,545 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-09-09 21:29:56,545 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 21:29:56,545 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 21:29:56,545 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-09-09 21:29:56,545 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 21:29:56,546 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 21:29:56,546 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 21:29:56,546 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 21:29:56,546 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 21:29:56,546 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 21:30:00,326 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 21:30:00,327 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 21:30:00,329 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 09:30:00 BoogieIcfgContainer [2019-09-09 21:30:00,329 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 21:30:00,330 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 21:30:00,330 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 21:30:00,333 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 21:30:00,333 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 09:29:54" (1/3) ... [2019-09-09 21:30:00,334 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c7d875b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 09:30:00, skipping insertion in model container [2019-09-09 21:30:00,334 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:29:56" (2/3) ... [2019-09-09 21:30:00,335 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c7d875b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 09:30:00, skipping insertion in model container [2019-09-09 21:30:00,335 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 09:30:00" (3/3) ... [2019-09-09 21:30:00,337 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem17_label41.c [2019-09-09 21:30:00,347 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 21:30:00,355 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 21:30:00,376 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 21:30:00,409 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 21:30:00,410 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 21:30:00,411 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 21:30:00,411 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 21:30:00,411 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 21:30:00,411 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 21:30:00,411 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 21:30:00,411 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 21:30:00,454 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states. [2019-09-09 21:30:00,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-09-09 21:30:00,465 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 21:30:00,466 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] [2019-09-09 21:30:00,468 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 21:30:00,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 21:30:00,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1810198175, now seen corresponding path program 1 times [2019-09-09 21:30:00,476 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 21:30:00,528 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:30:00,528 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 21:30:00,528 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:30:00,529 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 21:30:00,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 21:30:00,822 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 21:30:00,825 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 21:30:00,825 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 21:30:00,825 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 21:30:00,831 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 21:30:00,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 21:30:00,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 21:30:00,848 INFO L87 Difference]: Start difference. First operand 603 states. Second operand 4 states. [2019-09-09 21:30:06,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 21:30:06,627 INFO L93 Difference]: Finished difference Result 1565 states and 2620 transitions. [2019-09-09 21:30:06,627 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 21:30:06,629 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 40 [2019-09-09 21:30:06,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 21:30:06,665 INFO L225 Difference]: With dead ends: 1565 [2019-09-09 21:30:06,665 INFO L226 Difference]: Without dead ends: 1478 [2019-09-09 21:30:06,667 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 21:30:06,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1478 states. [2019-09-09 21:30:06,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1478 to 1006. [2019-09-09 21:30:06,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1006 states. [2019-09-09 21:30:06,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1006 states to 1006 states and 1697 transitions. [2019-09-09 21:30:06,778 INFO L78 Accepts]: Start accepts. Automaton has 1006 states and 1697 transitions. Word has length 40 [2019-09-09 21:30:06,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 21:30:06,779 INFO L475 AbstractCegarLoop]: Abstraction has 1006 states and 1697 transitions. [2019-09-09 21:30:06,779 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 21:30:06,779 INFO L276 IsEmpty]: Start isEmpty. Operand 1006 states and 1697 transitions. [2019-09-09 21:30:06,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-09-09 21:30:06,785 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 21:30:06,785 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:30:06,785 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 21:30:06,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 21:30:06,786 INFO L82 PathProgramCache]: Analyzing trace with hash 783785860, now seen corresponding path program 1 times [2019-09-09 21:30:06,786 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 21:30:06,787 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:30:06,788 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 21:30:06,788 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:30:06,788 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 21:30:06,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 21:30:06,975 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 21:30:06,975 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 21:30:06,976 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 21:30:06,976 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 21:30:06,980 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 21:30:06,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 21:30:06,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 21:30:06,981 INFO L87 Difference]: Start difference. First operand 1006 states and 1697 transitions. Second operand 6 states. [2019-09-09 21:30:11,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 21:30:11,943 INFO L93 Difference]: Finished difference Result 1931 states and 2979 transitions. [2019-09-09 21:30:11,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 21:30:11,944 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 115 [2019-09-09 21:30:11,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 21:30:11,963 INFO L225 Difference]: With dead ends: 1931 [2019-09-09 21:30:11,963 INFO L226 Difference]: Without dead ends: 1931 [2019-09-09 21:30:11,964 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 21:30:11,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1931 states. [2019-09-09 21:30:12,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1931 to 1911. [2019-09-09 21:30:12,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1911 states. [2019-09-09 21:30:12,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1911 states to 1911 states and 2935 transitions. [2019-09-09 21:30:12,059 INFO L78 Accepts]: Start accepts. Automaton has 1911 states and 2935 transitions. Word has length 115 [2019-09-09 21:30:12,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 21:30:12,061 INFO L475 AbstractCegarLoop]: Abstraction has 1911 states and 2935 transitions. [2019-09-09 21:30:12,062 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 21:30:12,062 INFO L276 IsEmpty]: Start isEmpty. Operand 1911 states and 2935 transitions. [2019-09-09 21:30:12,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-09-09 21:30:12,078 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 21:30:12,079 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:30:12,079 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 21:30:12,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 21:30:12,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1437267844, now seen corresponding path program 1 times [2019-09-09 21:30:12,081 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 21:30:12,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:30:12,084 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 21:30:12,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:30:12,085 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 21:30:12,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 21:30:12,281 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 21:30:12,283 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 21:30:12,283 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 21:30:12,284 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 21:30:12,286 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 21:30:12,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 21:30:12,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 21:30:12,287 INFO L87 Difference]: Start difference. First operand 1911 states and 2935 transitions. Second operand 6 states. [2019-09-09 21:30:16,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 21:30:16,407 INFO L93 Difference]: Finished difference Result 2841 states and 3676 transitions. [2019-09-09 21:30:16,410 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 21:30:16,410 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 119 [2019-09-09 21:30:16,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 21:30:16,434 INFO L225 Difference]: With dead ends: 2841 [2019-09-09 21:30:16,435 INFO L226 Difference]: Without dead ends: 2841 [2019-09-09 21:30:16,439 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 21:30:16,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2841 states. [2019-09-09 21:30:16,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2841 to 2819. [2019-09-09 21:30:16,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2819 states. [2019-09-09 21:30:16,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2819 states to 2819 states and 3606 transitions. [2019-09-09 21:30:16,544 INFO L78 Accepts]: Start accepts. Automaton has 2819 states and 3606 transitions. Word has length 119 [2019-09-09 21:30:16,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 21:30:16,546 INFO L475 AbstractCegarLoop]: Abstraction has 2819 states and 3606 transitions. [2019-09-09 21:30:16,546 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 21:30:16,546 INFO L276 IsEmpty]: Start isEmpty. Operand 2819 states and 3606 transitions. [2019-09-09 21:30:16,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-09-09 21:30:16,554 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 21:30:16,554 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:30:16,554 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 21:30:16,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 21:30:16,555 INFO L82 PathProgramCache]: Analyzing trace with hash -495366055, now seen corresponding path program 1 times [2019-09-09 21:30:16,555 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 21:30:16,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:30:16,556 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 21:30:16,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:30:16,557 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 21:30:16,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 21:30:16,746 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 21:30:16,747 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 21:30:16,747 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 21:30:16,747 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 21:30:16,748 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 21:30:16,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 21:30:16,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 21:30:16,749 INFO L87 Difference]: Start difference. First operand 2819 states and 3606 transitions. Second operand 4 states. [2019-09-09 21:30:20,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 21:30:20,440 INFO L93 Difference]: Finished difference Result 2819 states and 3569 transitions. [2019-09-09 21:30:20,445 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 21:30:20,445 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 149 [2019-09-09 21:30:20,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 21:30:20,461 INFO L225 Difference]: With dead ends: 2819 [2019-09-09 21:30:20,461 INFO L226 Difference]: Without dead ends: 2819 [2019-09-09 21:30:20,462 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 21:30:20,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2819 states. [2019-09-09 21:30:20,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2819 to 2819. [2019-09-09 21:30:20,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2819 states. [2019-09-09 21:30:20,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2819 states to 2819 states and 3569 transitions. [2019-09-09 21:30:20,521 INFO L78 Accepts]: Start accepts. Automaton has 2819 states and 3569 transitions. Word has length 149 [2019-09-09 21:30:20,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 21:30:20,522 INFO L475 AbstractCegarLoop]: Abstraction has 2819 states and 3569 transitions. [2019-09-09 21:30:20,522 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 21:30:20,522 INFO L276 IsEmpty]: Start isEmpty. Operand 2819 states and 3569 transitions. [2019-09-09 21:30:20,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2019-09-09 21:30:20,525 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 21:30:20,526 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-09-09 21:30:20,526 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 21:30:20,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 21:30:20,526 INFO L82 PathProgramCache]: Analyzing trace with hash -1406460647, now seen corresponding path program 1 times [2019-09-09 21:30:20,526 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 21:30:20,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:30:20,528 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 21:30:20,528 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:30:20,528 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 21:30:20,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 21:30:20,690 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2019-09-09 21:30:20,691 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 21:30:20,691 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 21:30:20,691 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 21:30:20,692 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 21:30:20,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 21:30:20,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 21:30:20,693 INFO L87 Difference]: Start difference. First operand 2819 states and 3569 transitions. Second operand 3 states. [2019-09-09 21:30:23,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 21:30:23,822 INFO L93 Difference]: Finished difference Result 5458 states and 6489 transitions. [2019-09-09 21:30:23,824 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 21:30:23,825 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 202 [2019-09-09 21:30:23,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 21:30:23,852 INFO L225 Difference]: With dead ends: 5458 [2019-09-09 21:30:23,852 INFO L226 Difference]: Without dead ends: 5458 [2019-09-09 21:30:23,853 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 1 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 21:30:23,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5458 states. [2019-09-09 21:30:23,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5458 to 5458. [2019-09-09 21:30:23,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5458 states. [2019-09-09 21:30:23,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5458 states to 5458 states and 6489 transitions. [2019-09-09 21:30:23,986 INFO L78 Accepts]: Start accepts. Automaton has 5458 states and 6489 transitions. Word has length 202 [2019-09-09 21:30:23,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 21:30:23,986 INFO L475 AbstractCegarLoop]: Abstraction has 5458 states and 6489 transitions. [2019-09-09 21:30:23,986 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 21:30:23,987 INFO L276 IsEmpty]: Start isEmpty. Operand 5458 states and 6489 transitions. [2019-09-09 21:30:23,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2019-09-09 21:30:23,991 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 21:30:23,991 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-09-09 21:30:23,991 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 21:30:23,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 21:30:23,992 INFO L82 PathProgramCache]: Analyzing trace with hash 326422220, now seen corresponding path program 1 times [2019-09-09 21:30:23,992 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 21:30:23,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:30:23,995 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 21:30:23,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:30:23,996 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 21:30:24,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 21:30:24,223 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2019-09-09 21:30:24,224 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 21:30:24,224 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 21:30:24,224 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 21:30:24,225 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 21:30:24,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 21:30:24,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 21:30:24,226 INFO L87 Difference]: Start difference. First operand 5458 states and 6489 transitions. Second operand 4 states. [2019-09-09 21:30:29,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 21:30:29,602 INFO L93 Difference]: Finished difference Result 10788 states and 12764 transitions. [2019-09-09 21:30:29,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 21:30:29,603 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 225 [2019-09-09 21:30:29,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 21:30:29,650 INFO L225 Difference]: With dead ends: 10788 [2019-09-09 21:30:29,651 INFO L226 Difference]: Without dead ends: 10788 [2019-09-09 21:30:29,651 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 21:30:29,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10788 states. [2019-09-09 21:30:29,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10788 to 9917. [2019-09-09 21:30:29,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9917 states. [2019-09-09 21:30:29,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9917 states to 9917 states and 11853 transitions. [2019-09-09 21:30:29,871 INFO L78 Accepts]: Start accepts. Automaton has 9917 states and 11853 transitions. Word has length 225 [2019-09-09 21:30:29,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 21:30:29,872 INFO L475 AbstractCegarLoop]: Abstraction has 9917 states and 11853 transitions. [2019-09-09 21:30:29,872 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 21:30:29,872 INFO L276 IsEmpty]: Start isEmpty. Operand 9917 states and 11853 transitions. [2019-09-09 21:30:29,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2019-09-09 21:30:29,879 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 21:30:29,879 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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 21:30:29,879 INFO L418 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 21:30:29,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 21:30:29,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1511203216, now seen corresponding path program 1 times [2019-09-09 21:30:29,880 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 21:30:29,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:30:29,881 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 21:30:29,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:30:29,881 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 21:30:29,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 21:30:30,120 INFO L134 CoverageAnalysis]: Checked inductivity of 322 backedges. 107 proven. 142 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2019-09-09 21:30:30,120 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 21:30:30,120 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 21:30:30,121 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 277 with the following transitions: [2019-09-09 21:30:30,125 INFO L207 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [938], [940], [943], [951], [959], [967], [975], [983], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1223], [1224], [1227], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1282], [2279], [2283], [2292], [2296], [2298], [2305], [2306], [2307], [2309], [2310] [2019-09-09 21:30:30,212 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 21:30:30,212 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 21:30:33,547 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 21:30:44,519 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 21:30:44,522 INFO L272 AbstractInterpreter]: Visited 96 different actions 283 times. Merged at 6 different actions 15 times. Never widened. Performed 676 root evaluator evaluations with a maximum evaluation depth of 15. Performed 676 inverse root evaluator evaluations with a maximum inverse evaluation depth of 15. Found 4 fixpoints after 2 different actions. Largest state had 26 variables. [2019-09-09 21:30:44,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 21:30:44,527 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 21:30:51,503 INFO L227 lantSequenceWeakener]: Weakened 273 states. On average, predicates are now at 75.3% of their original sizes. [2019-09-09 21:30:51,504 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 21:30:51,647 INFO L420 sIntCurrentIteration]: We unified 275 AI predicates to 275 [2019-09-09 21:30:51,648 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 21:30:51,648 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 21:30:51,649 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [13] imperfect sequences [7] total 18 [2019-09-09 21:30:51,649 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 21:30:51,649 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-09 21:30:51,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-09 21:30:51,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2019-09-09 21:30:51,650 INFO L87 Difference]: Start difference. First operand 9917 states and 11853 transitions. Second operand 13 states.