java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem19_label08.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 23:00:25,426 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 23:00:25,429 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 23:00:25,440 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 23:00:25,480 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-09 23:00:25,483 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-09 23:00:25,483 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-09 23:00:25,484 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-09 23:00:25,486 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-09 23:00:25,486 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-09 23:00:25,487 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-09 23:00:25,487 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-09 23:00:25,489 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 23:00:25,490 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 23:00:25,491 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 23:00:25,492 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-09-09 23:00:25,520 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 23:00:25,520 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 23:00:25,521 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 23:00:25,522 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 23:00:25,522 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 23:00:25,522 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 23:00:25,523 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 23:00:25,523 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 23:00:25,523 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 23:00:25,523 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 23:00:25,525 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 23:00:25,525 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 23:00:25,525 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 23:00:25,526 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 23:00:25,526 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 23:00:25,526 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 23:00:25,526 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 23:00:25,527 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 23:00:25,527 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 23:00:25,527 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 23:00:25,528 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 23:00:25,528 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 23:00:25,528 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 23:00:25,528 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 23:00:25,529 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 23:00:25,529 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 23:00:25,529 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 23:00:25,529 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 23:00:25,529 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 23:00:25,530 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 23:00:25,579 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 23:00:25,591 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 23:00:25,594 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 23:00:25,595 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 23:00:25,596 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 23:00:25,596 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label08.c [2019-09-09 23:00:25,657 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e354c8573/3b4b3ca9d87246e5968213fe1d43a755/FLAGea85238c8 [2019-09-09 23:00:26,503 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 23:00:26,504 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem19_label08.c [2019-09-09 23:00:26,549 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e354c8573/3b4b3ca9d87246e5968213fe1d43a755/FLAGea85238c8 [2019-09-09 23:00:26,943 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e354c8573/3b4b3ca9d87246e5968213fe1d43a755 [2019-09-09 23:00:26,952 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 23:00:26,954 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 23:00:26,955 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 23:00:26,955 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 23:00:26,986 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 23:00:26,987 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 11:00:26" (1/1) ... [2019-09-09 23:00:26,990 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17114e0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:00:26, skipping insertion in model container [2019-09-09 23:00:26,990 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 11:00:26" (1/1) ... [2019-09-09 23:00:26,997 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 23:00:27,280 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 23:00:29,586 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 23:00:29,592 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 23:00:30,651 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 23:00:30,699 INFO L192 MainTranslator]: Completed translation [2019-09-09 23:00:30,700 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:00:30 WrapperNode [2019-09-09 23:00:30,700 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 23:00:30,701 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 23:00:30,701 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 23:00:30,701 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 23:00:30,716 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:00:30" (1/1) ... [2019-09-09 23:00:30,718 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:00:30" (1/1) ... [2019-09-09 23:00:30,815 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:00:30" (1/1) ... [2019-09-09 23:00:30,816 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:00:30" (1/1) ... [2019-09-09 23:00:30,992 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:00:30" (1/1) ... [2019-09-09 23:00:31,070 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:00:30" (1/1) ... [2019-09-09 23:00:31,122 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:00:30" (1/1) ... [2019-09-09 23:00:31,176 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 23:00:31,177 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 23:00:31,177 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 23:00:31,177 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 23:00:31,178 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:00:30" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 23:00:31,260 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 23:00:31,260 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 23:00:31,260 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 23:00:31,260 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-09-09 23:00:31,261 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-09-09 23:00:31,261 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2019-09-09 23:00:31,261 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2019-09-09 23:00:31,261 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2019-09-09 23:00:31,261 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 23:00:31,262 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 23:00:31,262 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-09-09 23:00:31,262 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-09-09 23:00:31,263 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2019-09-09 23:00:31,264 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2019-09-09 23:00:31,264 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2019-09-09 23:00:31,265 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 23:00:31,265 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 23:00:31,266 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 23:00:31,266 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 23:00:31,266 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 23:00:31,266 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 23:00:41,960 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 23:00:41,960 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 23:00:41,966 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 11:00:41 BoogieIcfgContainer [2019-09-09 23:00:41,969 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 23:00:41,971 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 23:00:41,971 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 23:00:41,976 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 23:00:41,976 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 11:00:26" (1/3) ... [2019-09-09 23:00:41,977 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f7f667e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 11:00:41, skipping insertion in model container [2019-09-09 23:00:41,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:00:30" (2/3) ... [2019-09-09 23:00:41,978 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f7f667e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 11:00:41, skipping insertion in model container [2019-09-09 23:00:41,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 11:00:41" (3/3) ... [2019-09-09 23:00:41,982 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem19_label08.c [2019-09-09 23:00:41,998 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 23:00:42,013 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 23:00:42,040 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 23:00:42,084 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 23:00:42,084 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 23:00:42,084 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 23:00:42,085 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 23:00:42,085 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 23:00:42,085 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 23:00:42,085 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 23:00:42,086 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 23:00:42,162 INFO L276 IsEmpty]: Start isEmpty. Operand 1777 states. [2019-09-09 23:00:42,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-09-09 23:00:42,180 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 23:00:42,182 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] [2019-09-09 23:00:42,185 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 23:00:42,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 23:00:42,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1339858220, now seen corresponding path program 1 times [2019-09-09 23:00:42,197 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 23:00:42,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:00:42,274 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 23:00:42,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:00:42,274 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 23:00:42,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 23:00:42,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 23:00:42,685 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 23:00:42,686 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 23:00:42,686 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 23:00:42,692 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 23:00:42,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 23:00:42,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 23:00:42,713 INFO L87 Difference]: Start difference. First operand 1777 states. Second operand 3 states. [2019-09-09 23:00:54,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 23:00:54,674 INFO L93 Difference]: Finished difference Result 3266 states and 6065 transitions. [2019-09-09 23:00:54,674 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 23:00:54,676 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 43 [2019-09-09 23:00:54,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 23:00:54,721 INFO L225 Difference]: With dead ends: 3266 [2019-09-09 23:00:54,722 INFO L226 Difference]: Without dead ends: 3198 [2019-09-09 23:00:54,723 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 23:00:54,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3198 states. [2019-09-09 23:00:54,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3198 to 3145. [2019-09-09 23:00:54,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3145 states. [2019-09-09 23:00:54,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3145 states to 3145 states and 5842 transitions. [2019-09-09 23:00:54,888 INFO L78 Accepts]: Start accepts. Automaton has 3145 states and 5842 transitions. Word has length 43 [2019-09-09 23:00:54,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 23:00:54,890 INFO L475 AbstractCegarLoop]: Abstraction has 3145 states and 5842 transitions. [2019-09-09 23:00:54,890 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 23:00:54,891 INFO L276 IsEmpty]: Start isEmpty. Operand 3145 states and 5842 transitions. [2019-09-09 23:00:54,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-09-09 23:00:54,899 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 23:00:54,899 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 23:00:54,900 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 23:00:54,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 23:00:54,901 INFO L82 PathProgramCache]: Analyzing trace with hash -538363522, now seen corresponding path program 1 times [2019-09-09 23:00:54,901 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 23:00:54,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:00:54,903 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 23:00:54,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:00:54,903 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 23:00:54,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 23:00:55,108 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 23:00:55,108 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 23:00:55,109 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 23:00:55,109 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 23:00:55,111 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 23:00:55,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 23:00:55,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-09 23:00:55,111 INFO L87 Difference]: Start difference. First operand 3145 states and 5842 transitions. Second operand 6 states. [2019-09-09 23:01:22,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 23:01:22,579 INFO L93 Difference]: Finished difference Result 9079 states and 14980 transitions. [2019-09-09 23:01:22,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-09 23:01:22,580 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 118 [2019-09-09 23:01:22,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 23:01:22,635 INFO L225 Difference]: With dead ends: 9079 [2019-09-09 23:01:22,635 INFO L226 Difference]: Without dead ends: 9079 [2019-09-09 23:01:22,636 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-09-09 23:01:22,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9079 states. [2019-09-09 23:01:22,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9079 to 9024. [2019-09-09 23:01:22,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9024 states. [2019-09-09 23:01:22,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9024 states to 9024 states and 14811 transitions. [2019-09-09 23:01:22,939 INFO L78 Accepts]: Start accepts. Automaton has 9024 states and 14811 transitions. Word has length 118 [2019-09-09 23:01:22,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 23:01:22,943 INFO L475 AbstractCegarLoop]: Abstraction has 9024 states and 14811 transitions. [2019-09-09 23:01:22,943 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 23:01:22,944 INFO L276 IsEmpty]: Start isEmpty. Operand 9024 states and 14811 transitions. [2019-09-09 23:01:22,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-09-09 23:01:22,956 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 23:01:22,957 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 23:01:22,958 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 23:01:22,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 23:01:22,959 INFO L82 PathProgramCache]: Analyzing trace with hash 1533538378, now seen corresponding path program 1 times [2019-09-09 23:01:22,960 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 23:01:22,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:01:22,962 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 23:01:22,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:01:22,963 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 23:01:23,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 23:01:23,172 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 23:01:23,172 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 23:01:23,172 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 23:01:23,172 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 23:01:23,173 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 23:01:23,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 23:01:23,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-09 23:01:23,174 INFO L87 Difference]: Start difference. First operand 9024 states and 14811 transitions. Second operand 6 states. [2019-09-09 23:01:40,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 23:01:40,346 INFO L93 Difference]: Finished difference Result 18584 states and 29897 transitions. [2019-09-09 23:01:40,346 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-09 23:01:40,355 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 124 [2019-09-09 23:01:40,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 23:01:40,436 INFO L225 Difference]: With dead ends: 18584 [2019-09-09 23:01:40,437 INFO L226 Difference]: Without dead ends: 18584 [2019-09-09 23:01:40,437 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-09-09 23:01:40,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18584 states. [2019-09-09 23:01:40,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18584 to 18161. [2019-09-09 23:01:40,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18161 states. [2019-09-09 23:01:40,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18161 states to 18161 states and 29000 transitions. [2019-09-09 23:01:40,868 INFO L78 Accepts]: Start accepts. Automaton has 18161 states and 29000 transitions. Word has length 124 [2019-09-09 23:01:40,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 23:01:40,870 INFO L475 AbstractCegarLoop]: Abstraction has 18161 states and 29000 transitions. [2019-09-09 23:01:40,870 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 23:01:40,870 INFO L276 IsEmpty]: Start isEmpty. Operand 18161 states and 29000 transitions. [2019-09-09 23:01:40,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2019-09-09 23:01:40,873 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 23:01:40,873 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-09-09 23:01:40,874 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 23:01:40,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 23:01:40,874 INFO L82 PathProgramCache]: Analyzing trace with hash 932811860, now seen corresponding path program 1 times [2019-09-09 23:01:40,874 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 23:01:40,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:01:40,876 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 23:01:40,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:01:40,876 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 23:01:40,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 23:01:41,265 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 72 proven. 65 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-09 23:01:41,266 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 23:01:41,266 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 23:01:41,267 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 241 with the following transitions: [2019-09-09 23:01:41,272 INFO L207 CegarAbsIntRunner]: [0], [1], [5227], [5234], [5242], [5250], [5258], [5266], [5274], [5282], [5290], [5298], [5306], [5314], [5322], [5330], [5338], [5346], [5354], [5362], [5370], [5378], [5386], [5394], [5402], [5410], [5418], [5426], [5434], [5442], [5450], [5458], [5466], [5474], [5478], [5480], [5483], [5491], [5499], [5507], [5515], [5523], [5531], [5539], [5547], [5555], [5563], [5571], [5579], [5587], [5595], [5603], [5611], [5619], [5627], [5635], [5643], [5651], [5659], [5667], [5675], [5683], [5691], [5699], [5707], [5715], [5719], [5724], [5726], [5727], [5731], [5742], [5746], [5750], [5754], [5758], [5762], [5766], [5770], [5774], [5778], [5782], [5786], [5797], [5808], [5819], [5823], [5827], [5838], [5842], [5846], [5850], [5854], [5858], [5862], [5866], [5870], [5874], [5878], [5882], [5886], [5890], [5894], [5898], [5902], [5906], [5910], [5914], [5918], [5922], [5926], [5930], [5934], [5938], [5942], [5946], [5950], [5954], [5958], [5962], [5966], [5977], [5981], [5985], [5988], [5991], [5995], [6802], [6806], [6815], [6819], [6821], [6836], [6837], [6838], [6840], [6841] [2019-09-09 23:01:41,345 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 23:01:41,346 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 23:01:53,232 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 23:01:53,234 INFO L272 AbstractInterpreter]: Visited 129 different actions 129 times. Never merged. Never widened. Performed 302 root evaluator evaluations with a maximum evaluation depth of 15. Performed 302 inverse root evaluator evaluations with a maximum inverse evaluation depth of 15. Never found a fixpoint. Largest state had 26 variables. [2019-09-09 23:01:53,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 23:01:53,240 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 23:02:01,422 INFO L227 lantSequenceWeakener]: Weakened 217 states. On average, predicates are now at 75.6% of their original sizes. [2019-09-09 23:02:01,423 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 23:02:01,504 INFO L420 sIntCurrentIteration]: We unified 239 AI predicates to 239 [2019-09-09 23:02:01,504 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 23:02:01,505 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 23:02:01,505 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 14 [2019-09-09 23:02:01,505 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 23:02:01,506 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-09 23:02:01,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-09 23:02:01,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-09-09 23:02:01,507 INFO L87 Difference]: Start difference. First operand 18161 states and 29000 transitions. Second operand 10 states. [2019-09-09 23:05:15,185 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.