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/Problem14_label24.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 18:15:25,669 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 18:15:25,671 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 18:15:25,683 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 18:15:25,693 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-09 18:15:25,694 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-09 18:15:25,695 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-09 18:15:25,696 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-09 18:15:25,697 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-09 18:15:25,698 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-09 18:15:25,700 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-09 18:15:25,702 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-09 18:15:25,703 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-09 18:15:25,704 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-09 18:15:25,705 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-09 18:15:25,706 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-09 18:15:25,708 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-09 18:15:25,711 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-09 18:15:25,711 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-09 18:15:25,712 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-09 18:15:25,713 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-09 18:15:25,714 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-09 18:15:25,714 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-09 18:15:25,715 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-09 18:15:25,715 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-09 18:15:25,715 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 18:15:25,716 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 18:15:25,717 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 18:15:25,718 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 18:15:25,734 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 18:15:25,734 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 18:15:25,734 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 18:15:25,734 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 18:15:25,735 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 18:15:25,735 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 18:15:25,736 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 18:15:25,736 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 18:15:25,736 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 18:15:25,736 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 18:15:25,737 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 18:15:25,737 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 18:15:25,737 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 18:15:25,738 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 18:15:25,738 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 18:15:25,738 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 18:15:25,738 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 18:15:25,738 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 18:15:25,739 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 18:15:25,739 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 18:15:25,739 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 18:15:25,739 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 18:15:25,739 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 18:15:25,740 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 18:15:25,740 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 18:15:25,740 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 18:15:25,740 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 18:15:25,740 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 18:15:25,741 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 18:15:25,741 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 18:15:25,769 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 18:15:25,782 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 18:15:25,785 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 18:15:25,787 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 18:15:25,787 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 18:15:25,788 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label24.c [2019-09-09 18:15:25,848 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/591862861/33ddd85fbc5745f1b51e5174b06977a4/FLAG1ae4ff7d4 [2019-09-09 18:15:26,460 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 18:15:26,461 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label24.c [2019-09-09 18:15:26,477 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/591862861/33ddd85fbc5745f1b51e5174b06977a4/FLAG1ae4ff7d4 [2019-09-09 18:15:26,692 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/591862861/33ddd85fbc5745f1b51e5174b06977a4 [2019-09-09 18:15:26,704 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 18:15:26,706 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 18:15:26,709 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 18:15:26,709 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 18:15:26,713 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 18:15:26,714 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 06:15:26" (1/1) ... [2019-09-09 18:15:26,717 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2369f5c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:15:26, skipping insertion in model container [2019-09-09 18:15:26,717 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 06:15:26" (1/1) ... [2019-09-09 18:15:26,725 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 18:15:26,789 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 18:15:27,283 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 18:15:27,288 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 18:15:27,494 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 18:15:27,510 INFO L192 MainTranslator]: Completed translation [2019-09-09 18:15:27,511 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:15:27 WrapperNode [2019-09-09 18:15:27,511 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 18:15:27,512 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 18:15:27,512 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 18:15:27,512 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 18:15:27,523 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:15:27" (1/1) ... [2019-09-09 18:15:27,524 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:15:27" (1/1) ... [2019-09-09 18:15:27,547 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:15:27" (1/1) ... [2019-09-09 18:15:27,547 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:15:27" (1/1) ... [2019-09-09 18:15:27,592 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:15:27" (1/1) ... [2019-09-09 18:15:27,613 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:15:27" (1/1) ... [2019-09-09 18:15:27,621 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:15:27" (1/1) ... [2019-09-09 18:15:27,632 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 18:15:27,632 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 18:15:27,633 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 18:15:27,633 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 18:15:27,634 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:15:27" (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 18:15:27,724 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 18:15:27,724 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 18:15:27,724 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 18:15:27,725 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 18:15:27,725 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 18:15:27,725 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 18:15:27,725 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 18:15:27,725 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 18:15:27,726 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 18:15:27,726 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 18:15:27,726 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 18:15:29,209 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 18:15:29,209 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 18:15:29,213 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 06:15:29 BoogieIcfgContainer [2019-09-09 18:15:29,214 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 18:15:29,215 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 18:15:29,215 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 18:15:29,219 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 18:15:29,220 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 06:15:26" (1/3) ... [2019-09-09 18:15:29,221 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41f3d113 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 06:15:29, skipping insertion in model container [2019-09-09 18:15:29,221 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:15:27" (2/3) ... [2019-09-09 18:15:29,222 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41f3d113 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 06:15:29, skipping insertion in model container [2019-09-09 18:15:29,222 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 06:15:29" (3/3) ... [2019-09-09 18:15:29,228 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label24.c [2019-09-09 18:15:29,241 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 18:15:29,251 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 18:15:29,268 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 18:15:29,303 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 18:15:29,304 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 18:15:29,304 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 18:15:29,305 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 18:15:29,305 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 18:15:29,305 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 18:15:29,305 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 18:15:29,305 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 18:15:29,353 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-09-09 18:15:29,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-09-09 18:15:29,373 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:15:29,374 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] [2019-09-09 18:15:29,378 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:15:29,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:15:29,387 INFO L82 PathProgramCache]: Analyzing trace with hash 2116109586, now seen corresponding path program 1 times [2019-09-09 18:15:29,390 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:15:29,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:15:29,450 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:15:29,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:15:29,450 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:15:29,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:15:29,755 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 18:15:29,757 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 18:15:29,758 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 18:15:29,758 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:15:29,764 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 18:15:29,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 18:15:29,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 18:15:29,782 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 3 states. [2019-09-09 18:15:31,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:15:31,076 INFO L93 Difference]: Finished difference Result 440 states and 711 transitions. [2019-09-09 18:15:31,076 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 18:15:31,078 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 47 [2019-09-09 18:15:31,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:15:31,111 INFO L225 Difference]: With dead ends: 440 [2019-09-09 18:15:31,111 INFO L226 Difference]: Without dead ends: 372 [2019-09-09 18:15:31,114 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 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 18:15:31,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2019-09-09 18:15:31,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 372. [2019-09-09 18:15:31,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 372 states. [2019-09-09 18:15:31,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 602 transitions. [2019-09-09 18:15:31,190 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 602 transitions. Word has length 47 [2019-09-09 18:15:31,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:15:31,191 INFO L475 AbstractCegarLoop]: Abstraction has 372 states and 602 transitions. [2019-09-09 18:15:31,191 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 18:15:31,191 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 602 transitions. [2019-09-09 18:15:31,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-09-09 18:15:31,196 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:15:31,197 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:15:31,197 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:15:31,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:15:31,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1939521290, now seen corresponding path program 1 times [2019-09-09 18:15:31,198 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:15:31,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:15:31,199 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:15:31,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:15:31,200 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:15:31,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:15:31,441 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 18:15:31,442 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 18:15:31,442 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 18:15:31,442 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:15:31,444 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 18:15:31,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 18:15:31,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 18:15:31,445 INFO L87 Difference]: Start difference. First operand 372 states and 602 transitions. Second operand 6 states. [2019-09-09 18:15:32,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:15:32,776 INFO L93 Difference]: Finished difference Result 570 states and 828 transitions. [2019-09-09 18:15:32,776 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 18:15:32,776 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 121 [2019-09-09 18:15:32,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:15:32,781 INFO L225 Difference]: With dead ends: 570 [2019-09-09 18:15:32,781 INFO L226 Difference]: Without dead ends: 570 [2019-09-09 18:15:32,782 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 18:15:32,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2019-09-09 18:15:32,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 562. [2019-09-09 18:15:32,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 562 states. [2019-09-09 18:15:32,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 814 transitions. [2019-09-09 18:15:32,819 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 814 transitions. Word has length 121 [2019-09-09 18:15:32,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:15:32,823 INFO L475 AbstractCegarLoop]: Abstraction has 562 states and 814 transitions. [2019-09-09 18:15:32,823 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 18:15:32,823 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 814 transitions. [2019-09-09 18:15:32,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-09-09 18:15:32,826 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:15:32,826 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:15:32,826 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:15:32,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:15:32,827 INFO L82 PathProgramCache]: Analyzing trace with hash -2114473467, now seen corresponding path program 1 times [2019-09-09 18:15:32,827 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:15:32,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:15:32,828 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:15:32,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:15:32,829 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:15:32,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:15:32,976 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 18:15:32,977 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 18:15:32,977 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 18:15:32,978 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:15:32,979 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 18:15:32,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 18:15:32,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 18:15:32,980 INFO L87 Difference]: Start difference. First operand 562 states and 814 transitions. Second operand 4 states. [2019-09-09 18:15:34,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:15:34,643 INFO L93 Difference]: Finished difference Result 1660 states and 2315 transitions. [2019-09-09 18:15:34,644 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 18:15:34,644 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 130 [2019-09-09 18:15:34,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:15:34,655 INFO L225 Difference]: With dead ends: 1660 [2019-09-09 18:15:34,655 INFO L226 Difference]: Without dead ends: 1660 [2019-09-09 18:15:34,656 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 18:15:34,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1660 states. [2019-09-09 18:15:34,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1660 to 1476. [2019-09-09 18:15:34,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1476 states. [2019-09-09 18:15:34,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1476 states to 1476 states and 2051 transitions. [2019-09-09 18:15:34,708 INFO L78 Accepts]: Start accepts. Automaton has 1476 states and 2051 transitions. Word has length 130 [2019-09-09 18:15:34,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:15:34,709 INFO L475 AbstractCegarLoop]: Abstraction has 1476 states and 2051 transitions. [2019-09-09 18:15:34,709 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 18:15:34,709 INFO L276 IsEmpty]: Start isEmpty. Operand 1476 states and 2051 transitions. [2019-09-09 18:15:34,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2019-09-09 18:15:34,716 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:15:34,716 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 18:15:34,717 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:15:34,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:15:34,717 INFO L82 PathProgramCache]: Analyzing trace with hash 511372486, now seen corresponding path program 1 times [2019-09-09 18:15:34,717 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:15:34,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:15:34,719 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:15:34,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:15:34,719 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:15:34,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:15:35,254 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 111 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 18:15:35,255 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 18:15:35,255 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 18:15:35,256 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 234 with the following transitions: [2019-09-09 18:15:35,258 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [285], [287], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [514], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [663], [666], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977] [2019-09-09 18:15:35,308 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 18:15:35,308 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 18:15:45,135 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 18:15:45,137 INFO L272 AbstractInterpreter]: Visited 117 different actions 117 times. Never merged. Never widened. Performed 273 root evaluator evaluations with a maximum evaluation depth of 13. Performed 273 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Never found a fixpoint. Largest state had 24 variables. [2019-09-09 18:15:45,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:15:45,142 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 18:15:52,475 INFO L227 lantSequenceWeakener]: Weakened 214 states. On average, predicates are now at 78.02% of their original sizes. [2019-09-09 18:15:52,475 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 18:15:52,579 INFO L420 sIntCurrentIteration]: We unified 232 AI predicates to 232 [2019-09-09 18:15:52,579 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 18:15:52,580 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 18:15:52,580 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [11] total 20 [2019-09-09 18:15:52,581 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:15:52,581 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-09 18:15:52,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-09 18:15:52,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2019-09-09 18:15:52,582 INFO L87 Difference]: Start difference. First operand 1476 states and 2051 transitions. Second operand 11 states. [2019-09-09 18:17:27,047 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 18:19:54,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:19:54,623 INFO L93 Difference]: Finished difference Result 1662 states and 2248 transitions. [2019-09-09 18:19:54,623 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-09 18:19:54,623 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 233 [2019-09-09 18:19:54,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:19:54,632 INFO L225 Difference]: With dead ends: 1662 [2019-09-09 18:19:54,633 INFO L226 Difference]: Without dead ends: 1662 [2019-09-09 18:19:54,633 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2019-09-09 18:19:54,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1662 states. [2019-09-09 18:19:54,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1662 to 1658. [2019-09-09 18:19:54,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1658 states. [2019-09-09 18:19:54,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1658 states to 1658 states and 2241 transitions. [2019-09-09 18:19:54,678 INFO L78 Accepts]: Start accepts. Automaton has 1658 states and 2241 transitions. Word has length 233 [2019-09-09 18:19:54,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:19:54,679 INFO L475 AbstractCegarLoop]: Abstraction has 1658 states and 2241 transitions. [2019-09-09 18:19:54,679 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-09 18:19:54,679 INFO L276 IsEmpty]: Start isEmpty. Operand 1658 states and 2241 transitions. [2019-09-09 18:19:54,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2019-09-09 18:19:54,686 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:19:54,686 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, 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, 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] [2019-09-09 18:19:54,687 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:19:54,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:19:54,687 INFO L82 PathProgramCache]: Analyzing trace with hash -266552290, now seen corresponding path program 1 times [2019-09-09 18:19:54,688 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:19:54,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:19:54,689 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:19:54,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:19:54,689 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:19:54,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:19:55,367 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 206 proven. 142 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-09 18:19:55,368 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 18:19:55,368 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 18:19:55,368 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 318 with the following transitions: [2019-09-09 18:19:55,369 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [285], [287], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [514], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [554], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [663], [666], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977] [2019-09-09 18:19:55,379 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 18:19:55,379 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 18:20:06,770 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 18:20:06,771 INFO L272 AbstractInterpreter]: Visited 121 different actions 237 times. Merged at 4 different actions 5 times. Never widened. Performed 484 root evaluator evaluations with a maximum evaluation depth of 13. Performed 484 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-09-09 18:20:06,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:20:06,772 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 18:20:10,637 INFO L227 lantSequenceWeakener]: Weakened 314 states. On average, predicates are now at 77.71% of their original sizes. [2019-09-09 18:20:10,638 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 18:20:10,725 INFO L420 sIntCurrentIteration]: We unified 316 AI predicates to 316 [2019-09-09 18:20:10,726 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 18:20:10,726 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 18:20:10,726 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [12] total 21 [2019-09-09 18:20:10,726 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:20:10,727 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-09 18:20:10,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-09 18:20:10,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-09-09 18:20:10,728 INFO L87 Difference]: Start difference. First operand 1658 states and 2241 transitions. Second operand 11 states. [2019-09-09 18:20:52,278 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 18:24:34,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:24:34,415 INFO L93 Difference]: Finished difference Result 1874 states and 2467 transitions. [2019-09-09 18:24:34,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-09 18:24:34,416 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 317 [2019-09-09 18:24:34,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:24:34,424 INFO L225 Difference]: With dead ends: 1874 [2019-09-09 18:24:34,425 INFO L226 Difference]: Without dead ends: 1874 [2019-09-09 18:24:34,425 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 307 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2019-09-09 18:24:34,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1874 states. [2019-09-09 18:24:34,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1874 to 1658. [2019-09-09 18:24:34,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1658 states. [2019-09-09 18:24:34,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1658 states to 1658 states and 2240 transitions. [2019-09-09 18:24:34,469 INFO L78 Accepts]: Start accepts. Automaton has 1658 states and 2240 transitions. Word has length 317 [2019-09-09 18:24:34,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:24:34,469 INFO L475 AbstractCegarLoop]: Abstraction has 1658 states and 2240 transitions. [2019-09-09 18:24:34,470 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-09 18:24:34,470 INFO L276 IsEmpty]: Start isEmpty. Operand 1658 states and 2240 transitions. [2019-09-09 18:24:34,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2019-09-09 18:24:34,476 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:24:34,476 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-09-09 18:24:34,477 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:24:34,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:24:34,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1259852722, now seen corresponding path program 1 times [2019-09-09 18:24:34,477 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:24:34,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:24:34,479 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:24:34,479 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:24:34,479 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:24:34,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:24:35,420 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 131 proven. 243 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-09 18:24:35,420 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 18:24:35,420 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 18:24:35,421 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 344 with the following transitions: [2019-09-09 18:24:35,421 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [285], [287], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [514], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [658], [659], [663], [666], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977] [2019-09-09 18:24:35,428 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 18:24:35,428 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 18:24:50,312 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 18:24:50,312 INFO L272 AbstractInterpreter]: Visited 121 different actions 237 times. Merged at 4 different actions 5 times. Never widened. Performed 565 root evaluator evaluations with a maximum evaluation depth of 13. Performed 565 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-09-09 18:24:50,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:24:50,313 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 18:25:01,165 INFO L227 lantSequenceWeakener]: Weakened 340 states. On average, predicates are now at 77.68% of their original sizes. [2019-09-09 18:25:01,166 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 18:25:01,267 INFO L420 sIntCurrentIteration]: We unified 342 AI predicates to 342 [2019-09-09 18:25:01,267 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 18:25:01,268 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 18:25:01,268 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [15] total 24 [2019-09-09 18:25:01,268 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:25:01,269 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-09 18:25:01,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-09 18:25:01,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2019-09-09 18:25:01,270 INFO L87 Difference]: Start difference. First operand 1658 states and 2240 transitions. Second operand 11 states. [2019-09-09 18:25:43,862 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 18:27:24,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:27:24,036 INFO L93 Difference]: Finished difference Result 2026 states and 2622 transitions. [2019-09-09 18:27:24,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-09 18:27:24,037 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 343 [2019-09-09 18:27:24,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:27:24,046 INFO L225 Difference]: With dead ends: 2026 [2019-09-09 18:27:24,046 INFO L226 Difference]: Without dead ends: 2026 [2019-09-09 18:27:24,047 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 333 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2019-09-09 18:27:24,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2026 states. [2019-09-09 18:27:24,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2026 to 2024. [2019-09-09 18:27:24,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2024 states. [2019-09-09 18:27:24,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2024 states to 2024 states and 2620 transitions. [2019-09-09 18:27:24,095 INFO L78 Accepts]: Start accepts. Automaton has 2024 states and 2620 transitions. Word has length 343 [2019-09-09 18:27:24,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:27:24,096 INFO L475 AbstractCegarLoop]: Abstraction has 2024 states and 2620 transitions. [2019-09-09 18:27:24,096 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-09 18:27:24,096 INFO L276 IsEmpty]: Start isEmpty. Operand 2024 states and 2620 transitions. [2019-09-09 18:27:24,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 428 [2019-09-09 18:27:24,106 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:27:24,106 INFO L399 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 18:27:24,106 INFO L418 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:27:24,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:27:24,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1267583242, now seen corresponding path program 1 times [2019-09-09 18:27:24,107 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:27:24,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:27:24,108 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:27:24,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:27:24,109 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:27:24,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:27:24,405 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 250 proven. 182 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2019-09-09 18:27:24,406 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 18:27:24,406 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 18:27:24,406 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 428 with the following transitions: [2019-09-09 18:27:24,406 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [285], [287], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [514], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [554], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [658], [659], [663], [666], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977] [2019-09-09 18:27:24,411 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 18:27:24,411 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 18:27:39,365 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 18:27:39,365 INFO L272 AbstractInterpreter]: Visited 122 different actions 364 times. Merged at 6 different actions 18 times. Never widened. Performed 664 root evaluator evaluations with a maximum evaluation depth of 13. Performed 664 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Found 4 fixpoints after 2 different actions. Largest state had 24 variables. [2019-09-09 18:27:39,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:27:39,366 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 18:27:44,497 INFO L227 lantSequenceWeakener]: Weakened 424 states. On average, predicates are now at 77.61% of their original sizes. [2019-09-09 18:27:44,498 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 18:27:44,564 INFO L420 sIntCurrentIteration]: We unified 426 AI predicates to 426 [2019-09-09 18:27:44,564 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 18:27:44,564 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 18:27:44,565 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 14 [2019-09-09 18:27:44,565 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:27:44,565 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-09 18:27:44,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-09 18:27:44,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-09-09 18:27:44,566 INFO L87 Difference]: Start difference. First operand 2024 states and 2620 transitions. Second operand 10 states. [2019-09-09 18:28:21,042 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 18:28:54,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:28:54,801 INFO L93 Difference]: Finished difference Result 2399 states and 3017 transitions. [2019-09-09 18:28:54,802 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-09 18:28:54,802 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 427 [2019-09-09 18:28:54,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:28:54,812 INFO L225 Difference]: With dead ends: 2399 [2019-09-09 18:28:54,812 INFO L226 Difference]: Without dead ends: 2399 [2019-09-09 18:28:54,813 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 418 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2019-09-09 18:28:54,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2399 states. [2019-09-09 18:28:54,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2399 to 2212. [2019-09-09 18:28:54,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2212 states. [2019-09-09 18:28:54,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2212 states to 2212 states and 2822 transitions. [2019-09-09 18:28:54,867 INFO L78 Accepts]: Start accepts. Automaton has 2212 states and 2822 transitions. Word has length 427 [2019-09-09 18:28:54,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:28:54,868 INFO L475 AbstractCegarLoop]: Abstraction has 2212 states and 2822 transitions. [2019-09-09 18:28:54,868 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-09 18:28:54,868 INFO L276 IsEmpty]: Start isEmpty. Operand 2212 states and 2822 transitions. [2019-09-09 18:28:54,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 453 [2019-09-09 18:28:54,879 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:28:54,879 INFO L399 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 18:28:54,879 INFO L418 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:28:54,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:28:54,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1203933665, now seen corresponding path program 1 times [2019-09-09 18:28:54,880 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:28:54,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:28:54,881 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:28:54,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:28:54,882 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:28:54,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:28:55,471 INFO L134 CoverageAnalysis]: Checked inductivity of 710 backedges. 388 proven. 74 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2019-09-09 18:28:55,472 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 18:28:55,472 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 18:28:55,474 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 453 with the following transitions: [2019-09-09 18:28:55,475 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [285], [287], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [514], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [666], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977] [2019-09-09 18:28:55,489 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 18:28:55,489 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 18:29:09,174 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 18:29:26,554 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 18:29:26,554 INFO L272 AbstractInterpreter]: Visited 122 different actions 477 times. Merged at 6 different actions 19 times. Never widened. Performed 884 root evaluator evaluations with a maximum evaluation depth of 22. Performed 884 inverse root evaluator evaluations with a maximum inverse evaluation depth of 22. Found 4 fixpoints after 2 different actions. Largest state had 24 variables. [2019-09-09 18:29:26,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:29:26,555 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 18:29:36,550 INFO L227 lantSequenceWeakener]: Weakened 449 states. On average, predicates are now at 77.59% of their original sizes. [2019-09-09 18:29:36,551 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 18:29:36,628 INFO L420 sIntCurrentIteration]: We unified 451 AI predicates to 451 [2019-09-09 18:29:36,629 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 18:29:36,629 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 18:29:36,629 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [7] total 15 [2019-09-09 18:29:36,629 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:29:36,630 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-09 18:29:36,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-09 18:29:36,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-09-09 18:29:36,631 INFO L87 Difference]: Start difference. First operand 2212 states and 2822 transitions. Second operand 10 states.