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/Problem03_label53.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 08:03:27,473 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 08:03:27,475 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 08:03:27,488 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 08:03:27,524 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-09 08:03:27,524 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-09 08:03:27,525 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-09 08:03:27,526 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-09 08:03:27,527 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-09 08:03:27,527 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-09 08:03:27,528 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-09 08:03:27,528 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-09 08:03:27,528 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 08:03:27,529 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 08:03:27,530 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 08:03:27,530 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 08:03:27,544 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 08:03:27,545 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 08:03:27,545 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 08:03:27,545 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 08:03:27,546 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 08:03:27,546 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 08:03:27,546 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 08:03:27,547 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 08:03:27,547 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 08:03:27,547 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 08:03:27,548 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 08:03:27,548 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 08:03:27,548 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 08:03:27,548 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 08:03:27,548 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 08:03:27,549 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 08:03:27,549 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 08:03:27,549 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 08:03:27,549 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 08:03:27,549 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 08:03:27,549 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 08:03:27,550 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 08:03:27,550 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 08:03:27,550 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 08:03:27,550 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 08:03:27,551 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 08:03:27,551 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 08:03:27,551 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 08:03:27,551 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 08:03:27,551 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 08:03:27,589 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 08:03:27,602 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 08:03:27,605 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 08:03:27,607 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 08:03:27,607 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 08:03:27,608 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label53.c [2019-09-09 08:03:27,668 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89b119d0b/2158e11b1d00475cbcbd79e98bb330cd/FLAGaf6d32b24 [2019-09-09 08:03:28,359 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 08:03:28,361 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label53.c [2019-09-09 08:03:28,381 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89b119d0b/2158e11b1d00475cbcbd79e98bb330cd/FLAGaf6d32b24 [2019-09-09 08:03:28,520 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89b119d0b/2158e11b1d00475cbcbd79e98bb330cd [2019-09-09 08:03:28,529 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 08:03:28,531 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 08:03:28,532 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 08:03:28,532 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 08:03:28,535 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 08:03:28,536 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 08:03:28" (1/1) ... [2019-09-09 08:03:28,539 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ff6aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:03:28, skipping insertion in model container [2019-09-09 08:03:28,539 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 08:03:28" (1/1) ... [2019-09-09 08:03:28,547 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 08:03:28,645 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 08:03:29,447 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 08:03:29,461 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 08:03:29,697 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 08:03:29,718 INFO L192 MainTranslator]: Completed translation [2019-09-09 08:03:29,719 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:03:29 WrapperNode [2019-09-09 08:03:29,719 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 08:03:29,720 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 08:03:29,720 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 08:03:29,720 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 08:03:29,735 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:03:29" (1/1) ... [2019-09-09 08:03:29,736 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:03:29" (1/1) ... [2019-09-09 08:03:29,768 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:03:29" (1/1) ... [2019-09-09 08:03:29,769 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:03:29" (1/1) ... [2019-09-09 08:03:29,845 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:03:29" (1/1) ... [2019-09-09 08:03:29,876 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:03:29" (1/1) ... [2019-09-09 08:03:29,896 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:03:29" (1/1) ... [2019-09-09 08:03:29,908 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 08:03:29,910 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 08:03:29,910 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 08:03:29,910 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 08:03:29,911 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:03:29" (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 08:03:29,988 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 08:03:29,989 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 08:03:29,989 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 08:03:29,989 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 08:03:29,989 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 08:03:29,990 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 08:03:29,990 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 08:03:29,990 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 08:03:29,990 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 08:03:29,990 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 08:03:29,991 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 08:03:31,910 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 08:03:31,910 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 08:03:31,912 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 08:03:31 BoogieIcfgContainer [2019-09-09 08:03:31,912 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 08:03:31,913 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 08:03:31,913 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 08:03:31,917 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 08:03:31,917 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 08:03:28" (1/3) ... [2019-09-09 08:03:31,918 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@367d0af9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 08:03:31, skipping insertion in model container [2019-09-09 08:03:31,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:03:29" (2/3) ... [2019-09-09 08:03:31,919 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@367d0af9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 08:03:31, skipping insertion in model container [2019-09-09 08:03:31,919 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 08:03:31" (3/3) ... [2019-09-09 08:03:31,922 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem03_label53.c [2019-09-09 08:03:31,932 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 08:03:31,941 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 08:03:31,959 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 08:03:31,992 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 08:03:31,993 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 08:03:31,993 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 08:03:31,994 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 08:03:31,994 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 08:03:31,994 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 08:03:31,994 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 08:03:31,994 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 08:03:32,038 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states. [2019-09-09 08:03:32,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2019-09-09 08:03:32,080 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 08:03:32,082 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:03:32,084 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 08:03:32,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 08:03:32,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1005692243, now seen corresponding path program 1 times [2019-09-09 08:03:32,092 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 08:03:32,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 08:03:32,146 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 08:03:32,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 08:03:32,147 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 08:03:32,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 08:03:33,036 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 08:03:33,039 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 08:03:33,039 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 08:03:33,039 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 08:03:33,045 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 08:03:33,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 08:03:33,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 08:03:33,063 INFO L87 Difference]: Start difference. First operand 311 states. Second operand 4 states. [2019-09-09 08:03:35,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 08:03:35,249 INFO L93 Difference]: Finished difference Result 757 states and 1248 transitions. [2019-09-09 08:03:35,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 08:03:35,251 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 200 [2019-09-09 08:03:35,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 08:03:35,277 INFO L225 Difference]: With dead ends: 757 [2019-09-09 08:03:35,278 INFO L226 Difference]: Without dead ends: 685 [2019-09-09 08:03:35,280 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 08:03:35,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2019-09-09 08:03:35,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 465. [2019-09-09 08:03:35,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 465 states. [2019-09-09 08:03:35,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 750 transitions. [2019-09-09 08:03:35,399 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 750 transitions. Word has length 200 [2019-09-09 08:03:35,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 08:03:35,404 INFO L475 AbstractCegarLoop]: Abstraction has 465 states and 750 transitions. [2019-09-09 08:03:35,404 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 08:03:35,404 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 750 transitions. [2019-09-09 08:03:35,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2019-09-09 08:03:35,413 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 08:03:35,414 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:03:35,414 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 08:03:35,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 08:03:35,416 INFO L82 PathProgramCache]: Analyzing trace with hash -303037174, now seen corresponding path program 1 times [2019-09-09 08:03:35,417 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 08:03:35,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 08:03:35,418 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 08:03:35,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 08:03:35,419 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 08:03:35,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 08:03:35,603 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 08:03:35,603 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 08:03:35,603 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 08:03:35,604 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 08:03:35,606 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 08:03:35,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 08:03:35,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 08:03:35,606 INFO L87 Difference]: Start difference. First operand 465 states and 750 transitions. Second operand 6 states. [2019-09-09 08:03:37,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 08:03:37,168 INFO L93 Difference]: Finished difference Result 941 states and 1551 transitions. [2019-09-09 08:03:37,168 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-09 08:03:37,168 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 209 [2019-09-09 08:03:37,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 08:03:37,176 INFO L225 Difference]: With dead ends: 941 [2019-09-09 08:03:37,176 INFO L226 Difference]: Without dead ends: 941 [2019-09-09 08:03:37,177 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 08:03:37,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 941 states. [2019-09-09 08:03:37,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 941 to 900. [2019-09-09 08:03:37,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 900 states. [2019-09-09 08:03:37,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 900 states to 900 states and 1442 transitions. [2019-09-09 08:03:37,233 INFO L78 Accepts]: Start accepts. Automaton has 900 states and 1442 transitions. Word has length 209 [2019-09-09 08:03:37,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 08:03:37,234 INFO L475 AbstractCegarLoop]: Abstraction has 900 states and 1442 transitions. [2019-09-09 08:03:37,234 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 08:03:37,234 INFO L276 IsEmpty]: Start isEmpty. Operand 900 states and 1442 transitions. [2019-09-09 08:03:37,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2019-09-09 08:03:37,238 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 08:03:37,239 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:03:37,239 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 08:03:37,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 08:03:37,239 INFO L82 PathProgramCache]: Analyzing trace with hash -196421820, now seen corresponding path program 1 times [2019-09-09 08:03:37,240 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 08:03:37,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 08:03:37,241 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 08:03:37,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 08:03:37,241 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 08:03:37,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 08:03:37,356 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 08:03:37,358 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 08:03:37,358 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-09 08:03:37,358 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 08:03:37,360 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-09 08:03:37,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-09 08:03:37,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-09 08:03:37,361 INFO L87 Difference]: Start difference. First operand 900 states and 1442 transitions. Second operand 5 states. [2019-09-09 08:03:38,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 08:03:38,805 INFO L93 Difference]: Finished difference Result 1798 states and 2842 transitions. [2019-09-09 08:03:38,806 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 08:03:38,806 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 210 [2019-09-09 08:03:38,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 08:03:38,821 INFO L225 Difference]: With dead ends: 1798 [2019-09-09 08:03:38,821 INFO L226 Difference]: Without dead ends: 1798 [2019-09-09 08:03:38,822 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-09-09 08:03:38,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1798 states. [2019-09-09 08:03:38,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1798 to 1763. [2019-09-09 08:03:38,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1763 states. [2019-09-09 08:03:38,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1763 states to 1763 states and 2726 transitions. [2019-09-09 08:03:38,893 INFO L78 Accepts]: Start accepts. Automaton has 1763 states and 2726 transitions. Word has length 210 [2019-09-09 08:03:38,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 08:03:38,893 INFO L475 AbstractCegarLoop]: Abstraction has 1763 states and 2726 transitions. [2019-09-09 08:03:38,893 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-09 08:03:38,893 INFO L276 IsEmpty]: Start isEmpty. Operand 1763 states and 2726 transitions. [2019-09-09 08:03:38,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2019-09-09 08:03:38,903 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 08:03:38,904 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:03:38,904 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 08:03:38,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 08:03:38,905 INFO L82 PathProgramCache]: Analyzing trace with hash 396144665, now seen corresponding path program 1 times [2019-09-09 08:03:38,905 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 08:03:38,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 08:03:38,907 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 08:03:38,907 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 08:03:38,907 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 08:03:38,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 08:03:39,220 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 08:03:39,221 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 08:03:39,221 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 08:03:39,221 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 08:03:39,222 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 08:03:39,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 08:03:39,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 08:03:39,222 INFO L87 Difference]: Start difference. First operand 1763 states and 2726 transitions. Second operand 3 states. [2019-09-09 08:03:40,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 08:03:40,212 INFO L93 Difference]: Finished difference Result 3471 states and 5499 transitions. [2019-09-09 08:03:40,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 08:03:40,213 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 212 [2019-09-09 08:03:40,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 08:03:40,236 INFO L225 Difference]: With dead ends: 3471 [2019-09-09 08:03:40,236 INFO L226 Difference]: Without dead ends: 3471 [2019-09-09 08:03:40,237 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 08:03:40,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3471 states. [2019-09-09 08:03:40,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3471 to 3449. [2019-09-09 08:03:40,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3449 states. [2019-09-09 08:03:40,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3449 states to 3449 states and 5456 transitions. [2019-09-09 08:03:40,363 INFO L78 Accepts]: Start accepts. Automaton has 3449 states and 5456 transitions. Word has length 212 [2019-09-09 08:03:40,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 08:03:40,364 INFO L475 AbstractCegarLoop]: Abstraction has 3449 states and 5456 transitions. [2019-09-09 08:03:40,364 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 08:03:40,364 INFO L276 IsEmpty]: Start isEmpty. Operand 3449 states and 5456 transitions. [2019-09-09 08:03:40,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2019-09-09 08:03:40,379 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 08:03:40,380 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:03:40,380 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 08:03:40,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 08:03:40,380 INFO L82 PathProgramCache]: Analyzing trace with hash 660401901, now seen corresponding path program 1 times [2019-09-09 08:03:40,381 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 08:03:40,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 08:03:40,382 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 08:03:40,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 08:03:40,382 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 08:03:40,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 08:03:40,587 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 08:03:40,587 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 08:03:40,587 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-09-09 08:03:40,588 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 08:03:40,588 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-09 08:03:40,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-09 08:03:40,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-09-09 08:03:40,589 INFO L87 Difference]: Start difference. First operand 3449 states and 5456 transitions. Second operand 7 states. [2019-09-09 08:03:42,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 08:03:42,100 INFO L93 Difference]: Finished difference Result 7041 states and 13047 transitions. [2019-09-09 08:03:42,101 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 08:03:42,103 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 218 [2019-09-09 08:03:42,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 08:03:42,176 INFO L225 Difference]: With dead ends: 7041 [2019-09-09 08:03:42,177 INFO L226 Difference]: Without dead ends: 7041 [2019-09-09 08:03:42,177 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-09-09 08:03:42,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7041 states. [2019-09-09 08:03:42,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7041 to 6894. [2019-09-09 08:03:42,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6894 states. [2019-09-09 08:03:42,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6894 states to 6894 states and 11385 transitions. [2019-09-09 08:03:42,543 INFO L78 Accepts]: Start accepts. Automaton has 6894 states and 11385 transitions. Word has length 218 [2019-09-09 08:03:42,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 08:03:42,543 INFO L475 AbstractCegarLoop]: Abstraction has 6894 states and 11385 transitions. [2019-09-09 08:03:42,543 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-09 08:03:42,543 INFO L276 IsEmpty]: Start isEmpty. Operand 6894 states and 11385 transitions. [2019-09-09 08:03:42,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2019-09-09 08:03:42,580 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 08:03:42,580 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:03:42,581 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 08:03:42,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 08:03:42,582 INFO L82 PathProgramCache]: Analyzing trace with hash -122053074, now seen corresponding path program 1 times [2019-09-09 08:03:42,582 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 08:03:42,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 08:03:42,587 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 08:03:42,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 08:03:42,587 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 08:03:42,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 08:03:42,777 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 08:03:42,777 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 08:03:42,778 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 08:03:42,778 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 08:03:42,778 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 08:03:42,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 08:03:42,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 08:03:42,779 INFO L87 Difference]: Start difference. First operand 6894 states and 11385 transitions. Second operand 6 states. [2019-09-09 08:03:44,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 08:03:44,329 INFO L93 Difference]: Finished difference Result 13274 states and 21414 transitions. [2019-09-09 08:03:44,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 08:03:44,329 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 223 [2019-09-09 08:03:44,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 08:03:44,429 INFO L225 Difference]: With dead ends: 13274 [2019-09-09 08:03:44,429 INFO L226 Difference]: Without dead ends: 13274 [2019-09-09 08:03:44,430 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 08:03:44,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13274 states. [2019-09-09 08:03:44,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13274 to 13159. [2019-09-09 08:03:44,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13159 states. [2019-09-09 08:03:44,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13159 states to 13159 states and 20388 transitions. [2019-09-09 08:03:44,856 INFO L78 Accepts]: Start accepts. Automaton has 13159 states and 20388 transitions. Word has length 223 [2019-09-09 08:03:44,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 08:03:44,858 INFO L475 AbstractCegarLoop]: Abstraction has 13159 states and 20388 transitions. [2019-09-09 08:03:44,858 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 08:03:44,858 INFO L276 IsEmpty]: Start isEmpty. Operand 13159 states and 20388 transitions. [2019-09-09 08:03:44,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2019-09-09 08:03:44,902 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 08:03:44,903 INFO L399 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:03:44,903 INFO L418 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 08:03:44,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 08:03:44,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1239287869, now seen corresponding path program 1 times [2019-09-09 08:03:44,904 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 08:03:44,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 08:03:44,904 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 08:03:44,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 08:03:44,909 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 08:03:45,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 08:03:45,616 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-09-09 08:03:45,616 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 08:03:45,616 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 08:03:45,617 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 08:03:45,617 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 08:03:45,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 08:03:45,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-09-09 08:03:45,618 INFO L87 Difference]: Start difference. First operand 13159 states and 20388 transitions. Second operand 6 states. [2019-09-09 08:03:47,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 08:03:47,334 INFO L93 Difference]: Finished difference Result 14485 states and 21928 transitions. [2019-09-09 08:03:47,334 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-09 08:03:47,334 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 246 [2019-09-09 08:03:47,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 08:03:47,395 INFO L225 Difference]: With dead ends: 14485 [2019-09-09 08:03:47,395 INFO L226 Difference]: Without dead ends: 14145 [2019-09-09 08:03:47,396 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-09-09 08:03:47,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14145 states. [2019-09-09 08:03:47,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14145 to 13848. [2019-09-09 08:03:47,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13848 states. [2019-09-09 08:03:47,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13848 states to 13848 states and 21286 transitions. [2019-09-09 08:03:47,760 INFO L78 Accepts]: Start accepts. Automaton has 13848 states and 21286 transitions. Word has length 246 [2019-09-09 08:03:47,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 08:03:47,760 INFO L475 AbstractCegarLoop]: Abstraction has 13848 states and 21286 transitions. [2019-09-09 08:03:47,761 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 08:03:47,761 INFO L276 IsEmpty]: Start isEmpty. Operand 13848 states and 21286 transitions. [2019-09-09 08:03:47,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2019-09-09 08:03:47,818 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 08:03:47,818 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:03:47,819 INFO L418 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 08:03:47,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 08:03:47,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1269257287, now seen corresponding path program 1 times [2019-09-09 08:03:47,820 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 08:03:47,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 08:03:47,821 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 08:03:47,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 08:03:47,822 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 08:03:47,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 08:03:48,422 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 08:03:48,423 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 08:03:48,423 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 08:03:48,423 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 279 with the following transitions: [2019-09-09 08:03:48,426 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [334], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [833], [841], [849], [857], [865], [873], [881], [889], [897], [905], [913], [921], [929], [937], [945], [953], [961], [969], [977], [985], [993], [1001], [1009], [1017], [1025], [1033], [1041], [1049], [1057], [1065], [1069], [1071], [1157], [1161], [1170], [1174], [1176], [1181], [1182], [1183], [1185], [1186] [2019-09-09 08:03:48,489 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 08:03:48,489 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)