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/Problem16_label02.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 19:48:08,370 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 19:48:08,372 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 19:48:08,384 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 19:48:08,416 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 19:48:08,416 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 19:48:08,417 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 19:48:08,418 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 19:48:08,440 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 19:48:08,441 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 19:48:08,441 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 19:48:08,441 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 19:48:08,442 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 19:48:08,442 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 19:48:08,442 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 19:48:08,443 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 19:48:08,443 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 19:48:08,444 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 19:48:08,444 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 19:48:08,445 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 19:48:08,445 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 19:48:08,446 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 19:48:08,446 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 19:48:08,446 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 19:48:08,447 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 19:48:08,447 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 19:48:08,447 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 19:48:08,447 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 19:48:08,448 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 19:48:08,448 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 19:48:08,448 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 19:48:08,448 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 19:48:08,449 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 19:48:08,449 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 19:48:08,449 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 19:48:08,449 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 19:48:08,449 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 19:48:08,450 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 19:48:08,498 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 19:48:08,512 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 19:48:08,515 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 19:48:08,516 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 19:48:08,517 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 19:48:08,517 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label02.c [2019-09-09 19:48:08,579 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/96f3c6cf4/f351ab6e1ff84b6f9600eb530d9ed04c/FLAG2cf39b0f4 [2019-09-09 19:48:09,245 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 19:48:09,246 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label02.c [2019-09-09 19:48:09,268 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/96f3c6cf4/f351ab6e1ff84b6f9600eb530d9ed04c/FLAG2cf39b0f4 [2019-09-09 19:48:09,419 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/96f3c6cf4/f351ab6e1ff84b6f9600eb530d9ed04c [2019-09-09 19:48:09,428 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 19:48:09,430 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 19:48:09,431 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 19:48:09,431 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 19:48:09,435 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 19:48:09,436 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 07:48:09" (1/1) ... [2019-09-09 19:48:09,439 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25707088 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:48:09, skipping insertion in model container [2019-09-09 19:48:09,439 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 07:48:09" (1/1) ... [2019-09-09 19:48:09,447 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 19:48:09,521 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 19:48:10,364 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 19:48:10,378 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 19:48:10,711 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 19:48:10,734 INFO L192 MainTranslator]: Completed translation [2019-09-09 19:48:10,735 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:48:10 WrapperNode [2019-09-09 19:48:10,735 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 19:48:10,736 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 19:48:10,737 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 19:48:10,737 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 19:48:10,754 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:48:10" (1/1) ... [2019-09-09 19:48:10,754 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:48:10" (1/1) ... [2019-09-09 19:48:10,808 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:48:10" (1/1) ... [2019-09-09 19:48:10,809 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:48:10" (1/1) ... [2019-09-09 19:48:10,879 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:48:10" (1/1) ... [2019-09-09 19:48:10,911 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:48:10" (1/1) ... [2019-09-09 19:48:10,930 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:48:10" (1/1) ... [2019-09-09 19:48:10,955 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 19:48:10,955 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 19:48:10,955 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 19:48:10,956 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 19:48:10,957 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:48:10" (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 19:48:11,024 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 19:48:11,025 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 19:48:11,025 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 19:48:11,025 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-09-09 19:48:11,025 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 19:48:11,025 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 19:48:11,026 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-09-09 19:48:11,026 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 19:48:11,026 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 19:48:11,026 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 19:48:11,027 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 19:48:11,027 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 19:48:11,028 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 19:48:13,479 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 19:48:13,479 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 19:48:13,481 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 07:48:13 BoogieIcfgContainer [2019-09-09 19:48:13,481 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 19:48:13,482 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 19:48:13,482 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 19:48:13,486 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 19:48:13,486 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 07:48:09" (1/3) ... [2019-09-09 19:48:13,487 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74f2babb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 07:48:13, skipping insertion in model container [2019-09-09 19:48:13,487 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:48:10" (2/3) ... [2019-09-09 19:48:13,489 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74f2babb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 07:48:13, skipping insertion in model container [2019-09-09 19:48:13,489 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 07:48:13" (3/3) ... [2019-09-09 19:48:13,495 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label02.c [2019-09-09 19:48:13,508 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 19:48:13,520 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 19:48:13,539 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 19:48:13,575 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 19:48:13,576 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 19:48:13,576 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 19:48:13,576 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 19:48:13,576 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 19:48:13,576 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 19:48:13,577 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 19:48:13,577 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 19:48:13,624 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-09-09 19:48:13,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-09-09 19:48:13,643 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 19:48:13,644 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] [2019-09-09 19:48:13,646 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 19:48:13,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:48:13,653 INFO L82 PathProgramCache]: Analyzing trace with hash -64019710, now seen corresponding path program 1 times [2019-09-09 19:48:13,655 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 19:48:13,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:48:13,711 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 19:48:13,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:48:13,711 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 19:48:13,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 19:48:14,030 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 19:48:14,032 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 19:48:14,032 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 19:48:14,033 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 19:48:14,038 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 19:48:14,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 19:48:14,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 19:48:14,057 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 4 states. [2019-09-09 19:48:17,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 19:48:17,877 INFO L93 Difference]: Finished difference Result 1106 states and 1888 transitions. [2019-09-09 19:48:17,878 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 19:48:17,880 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2019-09-09 19:48:17,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 19:48:17,916 INFO L225 Difference]: With dead ends: 1106 [2019-09-09 19:48:17,917 INFO L226 Difference]: Without dead ends: 1019 [2019-09-09 19:48:17,919 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 19:48:17,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1019 states. [2019-09-09 19:48:18,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1019 to 1019. [2019-09-09 19:48:18,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1019 states. [2019-09-09 19:48:18,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1019 states to 1019 states and 1739 transitions. [2019-09-09 19:48:18,050 INFO L78 Accepts]: Start accepts. Automaton has 1019 states and 1739 transitions. Word has length 67 [2019-09-09 19:48:18,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 19:48:18,051 INFO L475 AbstractCegarLoop]: Abstraction has 1019 states and 1739 transitions. [2019-09-09 19:48:18,051 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 19:48:18,051 INFO L276 IsEmpty]: Start isEmpty. Operand 1019 states and 1739 transitions. [2019-09-09 19:48:18,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-09-09 19:48:18,063 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 19:48:18,065 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 19:48:18,066 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 19:48:18,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:48:18,067 INFO L82 PathProgramCache]: Analyzing trace with hash -2118195102, now seen corresponding path program 1 times [2019-09-09 19:48:18,067 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 19:48:18,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:48:18,069 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 19:48:18,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:48:18,069 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 19:48:18,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 19:48:18,309 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 19:48:18,309 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 19:48:18,310 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 19:48:18,310 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 19:48:18,312 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 19:48:18,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 19:48:18,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 19:48:18,313 INFO L87 Difference]: Start difference. First operand 1019 states and 1739 transitions. Second operand 6 states. [2019-09-09 19:48:23,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 19:48:23,553 INFO L93 Difference]: Finished difference Result 2084 states and 3454 transitions. [2019-09-09 19:48:23,553 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 19:48:23,554 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 137 [2019-09-09 19:48:23,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 19:48:23,574 INFO L225 Difference]: With dead ends: 2084 [2019-09-09 19:48:23,574 INFO L226 Difference]: Without dead ends: 2084 [2019-09-09 19:48:23,575 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 19:48:23,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2084 states. [2019-09-09 19:48:23,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2084 to 2061. [2019-09-09 19:48:23,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2061 states. [2019-09-09 19:48:23,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2061 states to 2061 states and 3384 transitions. [2019-09-09 19:48:23,694 INFO L78 Accepts]: Start accepts. Automaton has 2061 states and 3384 transitions. Word has length 137 [2019-09-09 19:48:23,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 19:48:23,697 INFO L475 AbstractCegarLoop]: Abstraction has 2061 states and 3384 transitions. [2019-09-09 19:48:23,697 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 19:48:23,697 INFO L276 IsEmpty]: Start isEmpty. Operand 2061 states and 3384 transitions. [2019-09-09 19:48:23,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2019-09-09 19:48:23,706 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 19:48:23,706 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:48:23,707 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 19:48:23,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:48:23,708 INFO L82 PathProgramCache]: Analyzing trace with hash -287717798, now seen corresponding path program 1 times [2019-09-09 19:48:23,708 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 19:48:23,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:48:23,710 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 19:48:23,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:48:23,711 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 19:48:23,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 19:48:23,970 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 19:48:23,971 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 19:48:23,972 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 19:48:23,972 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 19:48:23,975 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 19:48:23,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 19:48:23,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 19:48:23,976 INFO L87 Difference]: Start difference. First operand 2061 states and 3384 transitions. Second operand 6 states. [2019-09-09 19:48:27,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 19:48:27,045 INFO L93 Difference]: Finished difference Result 3849 states and 6346 transitions. [2019-09-09 19:48:27,046 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 19:48:27,047 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 165 [2019-09-09 19:48:27,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 19:48:27,074 INFO L225 Difference]: With dead ends: 3849 [2019-09-09 19:48:27,074 INFO L226 Difference]: Without dead ends: 3849 [2019-09-09 19:48:27,075 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-09-09 19:48:27,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3849 states. [2019-09-09 19:48:27,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3849 to 3813. [2019-09-09 19:48:27,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3813 states. [2019-09-09 19:48:27,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3813 states to 3813 states and 6183 transitions. [2019-09-09 19:48:27,196 INFO L78 Accepts]: Start accepts. Automaton has 3813 states and 6183 transitions. Word has length 165 [2019-09-09 19:48:27,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 19:48:27,197 INFO L475 AbstractCegarLoop]: Abstraction has 3813 states and 6183 transitions. [2019-09-09 19:48:27,197 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 19:48:27,197 INFO L276 IsEmpty]: Start isEmpty. Operand 3813 states and 6183 transitions. [2019-09-09 19:48:27,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2019-09-09 19:48:27,200 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 19:48:27,201 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:48:27,201 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 19:48:27,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:48:27,202 INFO L82 PathProgramCache]: Analyzing trace with hash 319632798, now seen corresponding path program 1 times [2019-09-09 19:48:27,202 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 19:48:27,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:48:27,203 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 19:48:27,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:48:27,203 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 19:48:27,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 19:48:27,363 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 19:48:27,363 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 19:48:27,364 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 19:48:27,364 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 19:48:27,365 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 19:48:27,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 19:48:27,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 19:48:27,366 INFO L87 Difference]: Start difference. First operand 3813 states and 6183 transitions. Second operand 6 states. [2019-09-09 19:48:29,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 19:48:29,982 INFO L93 Difference]: Finished difference Result 5942 states and 8256 transitions. [2019-09-09 19:48:29,983 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 19:48:29,983 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 183 [2019-09-09 19:48:29,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 19:48:30,018 INFO L225 Difference]: With dead ends: 5942 [2019-09-09 19:48:30,019 INFO L226 Difference]: Without dead ends: 5942 [2019-09-09 19:48:30,019 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 19:48:30,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5942 states. [2019-09-09 19:48:30,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5942 to 5896. [2019-09-09 19:48:30,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5896 states. [2019-09-09 19:48:30,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5896 states to 5896 states and 8054 transitions. [2019-09-09 19:48:30,215 INFO L78 Accepts]: Start accepts. Automaton has 5896 states and 8054 transitions. Word has length 183 [2019-09-09 19:48:30,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 19:48:30,217 INFO L475 AbstractCegarLoop]: Abstraction has 5896 states and 8054 transitions. [2019-09-09 19:48:30,217 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 19:48:30,217 INFO L276 IsEmpty]: Start isEmpty. Operand 5896 states and 8054 transitions. [2019-09-09 19:48:30,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2019-09-09 19:48:30,224 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 19:48:30,225 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:48:30,225 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 19:48:30,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:48:30,226 INFO L82 PathProgramCache]: Analyzing trace with hash 511639243, now seen corresponding path program 1 times [2019-09-09 19:48:30,226 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 19:48:30,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:48:30,227 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 19:48:30,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:48:30,228 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 19:48:30,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 19:48:30,557 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 19:48:30,557 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 19:48:30,557 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 19:48:30,558 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 19:48:30,558 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 19:48:30,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 19:48:30,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 19:48:30,560 INFO L87 Difference]: Start difference. First operand 5896 states and 8054 transitions. Second operand 6 states. [2019-09-09 19:48:33,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 19:48:33,300 INFO L93 Difference]: Finished difference Result 8687 states and 11576 transitions. [2019-09-09 19:48:33,301 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 19:48:33,301 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 230 [2019-09-09 19:48:33,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 19:48:33,347 INFO L225 Difference]: With dead ends: 8687 [2019-09-09 19:48:33,347 INFO L226 Difference]: Without dead ends: 8687 [2019-09-09 19:48:33,348 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-09-09 19:48:33,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8687 states. [2019-09-09 19:48:33,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8687 to 8651. [2019-09-09 19:48:33,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8651 states. [2019-09-09 19:48:33,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8651 states to 8651 states and 11412 transitions. [2019-09-09 19:48:33,560 INFO L78 Accepts]: Start accepts. Automaton has 8651 states and 11412 transitions. Word has length 230 [2019-09-09 19:48:33,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 19:48:33,561 INFO L475 AbstractCegarLoop]: Abstraction has 8651 states and 11412 transitions. [2019-09-09 19:48:33,561 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 19:48:33,561 INFO L276 IsEmpty]: Start isEmpty. Operand 8651 states and 11412 transitions. [2019-09-09 19:48:33,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2019-09-09 19:48:33,565 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 19:48:33,565 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 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 19:48:33,566 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 19:48:33,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:48:33,566 INFO L82 PathProgramCache]: Analyzing trace with hash -71690297, now seen corresponding path program 1 times [2019-09-09 19:48:33,567 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 19:48:33,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:48:33,570 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 19:48:33,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:48:33,570 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 19:48:33,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 19:48:33,838 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 123 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-09-09 19:48:33,838 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 19:48:33,838 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 19:48:33,839 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 19:48:33,839 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 19:48:33,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 19:48:33,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 19:48:33,840 INFO L87 Difference]: Start difference. First operand 8651 states and 11412 transitions. Second operand 4 states. [2019-09-09 19:48:37,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 19:48:37,246 INFO L93 Difference]: Finished difference Result 14417 states and 17911 transitions. [2019-09-09 19:48:37,246 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 19:48:37,246 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 266 [2019-09-09 19:48:37,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 19:48:37,296 INFO L225 Difference]: With dead ends: 14417 [2019-09-09 19:48:37,297 INFO L226 Difference]: Without dead ends: 14417 [2019-09-09 19:48:37,297 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 19:48:37,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14417 states. [2019-09-09 19:48:37,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14417 to 13741. [2019-09-09 19:48:37,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13741 states. [2019-09-09 19:48:37,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13741 states to 13741 states and 17141 transitions. [2019-09-09 19:48:37,563 INFO L78 Accepts]: Start accepts. Automaton has 13741 states and 17141 transitions. Word has length 266 [2019-09-09 19:48:37,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 19:48:37,564 INFO L475 AbstractCegarLoop]: Abstraction has 13741 states and 17141 transitions. [2019-09-09 19:48:37,564 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 19:48:37,564 INFO L276 IsEmpty]: Start isEmpty. Operand 13741 states and 17141 transitions. [2019-09-09 19:48:37,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2019-09-09 19:48:37,585 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 19:48:37,585 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-09-09 19:48:37,585 INFO L418 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 19:48:37,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:48:37,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1075441394, now seen corresponding path program 1 times [2019-09-09 19:48:37,586 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 19:48:37,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:48:37,592 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 19:48:37,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:48:37,592 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 19:48:37,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 19:48:38,294 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2019-09-09 19:48:38,295 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 19:48:38,295 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 19:48:38,297 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 490 with the following transitions: [2019-09-09 19:48:38,301 INFO L207 CegarAbsIntRunner]: [0], [1], [180], [187], [195], [203], [211], [219], [227], [235], [243], [251], [259], [267], [275], [283], [291], [299], [307], [315], [323], [331], [339], [347], [355], [363], [371], [379], [387], [395], [403], [411], [419], [427], [435], [443], [451], [459], [467], [475], [483], [491], [499], [507], [515], [523], [531], [539], [547], [555], [563], [571], [579], [587], [595], [603], [611], [619], [623], [625], [628], [636], [644], [652], [660], [668], [673], [677], [681], [685], [689], [693], [697], [701], [705], [709], [713], [717], [721], [725], [729], [733], [737], [741], [745], [749], [753], [757], [761], [765], [769], [773], [777], [781], [785], [789], [793], [797], [801], [805], [809], [813], [817], [821], [825], [829], [833], [837], [841], [845], [849], [853], [857], [861], [865], [869], [873], [877], [881], [885], [889], [893], [897], [901], [905], [909], [913], [917], [921], [925], [929], [933], [937], [941], [945], [949], [953], [957], [961], [965], [969], [973], [977], [981], [985], [989], [993], [997], [1001], [1005], [1009], [1013], [1017], [1021], [1025], [1029], [1033], [1037], [1041], [1045], [1049], [1053], [1057], [1061], [1065], [1069], [1073], [1077], [1081], [1085], [1089], [1093], [1097], [1101], [1105], [1109], [1113], [1117], [1121], [1125], [1128], [1129], [1133], [1137], [1141], [1145], [1149], [1153], [1157], [1161], [1165], [1169], [1173], [1177], [1181], [1185], [1189], [1193], [1197], [1201], [1205], [1209], [1213], [1217], [1221], [1225], [1229], [1233], [1237], [1241], [1245], [1249], [1253], [1257], [1261], [1265], [1269], [1273], [1277], [1281], [1285], [1289], [1293], [1297], [1301], [1305], [1309], [1313], [1317], [1321], [1325], [1329], [1333], [1337], [1341], [1345], [1349], [1352], [1552], [1556], [1565], [1569], [1571], [1578], [1579], [1580], [1582], [1583] [2019-09-09 19:48:38,390 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 19:48:38,390 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 19:49:12,077 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 19:49:28,888 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 19:49:28,892 INFO L272 AbstractInterpreter]: Visited 247 different actions 734 times. Merged at 6 different actions 13 times. Never widened. Performed 1300 root evaluator evaluations with a maximum evaluation depth of 16. Performed 1300 inverse root evaluator evaluations with a maximum inverse evaluation depth of 16. Found 3 fixpoints after 2 different actions. Largest state had 24 variables. [2019-09-09 19:49:28,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:49:28,897 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 19:49:39,815 INFO L227 lantSequenceWeakener]: Weakened 486 states. On average, predicates are now at 77.73% of their original sizes. [2019-09-09 19:49:39,815 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 19:49:39,924 INFO L420 sIntCurrentIteration]: We unified 488 AI predicates to 488 [2019-09-09 19:49:39,925 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 19:49:39,926 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 19:49:39,926 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [7] total 15 [2019-09-09 19:49:39,926 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 19:49:39,927 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-09 19:49:39,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-09 19:49:39,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-09-09 19:49:39,928 INFO L87 Difference]: Start difference. First operand 13741 states and 17141 transitions. Second operand 10 states.