java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem17_label05.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 20:54:04,227 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 20:54:04,230 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 20:54:04,243 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 20:54:04,252 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-09 20:54:04,253 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-09 20:54:04,254 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-09 20:54:04,255 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-09 20:54:04,255 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-09 20:54:04,256 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-09 20:54:04,258 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-09 20:54:04,260 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-09 20:54:04,262 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-09 20:54:04,263 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-09 20:54:04,264 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-09 20:54:04,265 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-09 20:54:04,267 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-09 20:54:04,270 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-09 20:54:04,271 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-09 20:54:04,272 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-09 20:54:04,275 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-09 20:54:04,276 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-09 20:54:04,276 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-09 20:54:04,277 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-09 20:54:04,277 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... 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[2019-09-09 20:54:04,282 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 20:54:04,311 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 20:54:04,312 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 20:54:04,313 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 20:54:04,314 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 20:54:04,314 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 20:54:04,314 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 20:54:04,315 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 20:54:04,315 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 20:54:04,315 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 20:54:04,315 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 20:54:04,316 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 20:54:04,316 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 20:54:04,316 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 20:54:04,316 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 20:54:04,317 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 20:54:04,317 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 20:54:04,317 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 20:54:04,318 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 20:54:04,318 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 20:54:04,319 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 20:54:04,319 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 20:54:04,319 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 20:54:04,319 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 20:54:04,320 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 20:54:04,320 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 20:54:04,320 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 20:54:04,321 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 20:54:04,321 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 20:54:04,321 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 20:54:04,321 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 20:54:04,369 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 20:54:04,383 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 20:54:04,386 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 20:54:04,387 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 20:54:04,388 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 20:54:04,388 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label05.c [2019-09-09 20:54:04,447 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/715d866f7/9310225538614560a7eb78e5d6cf83bf/FLAG24dcea249 [2019-09-09 20:54:05,174 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 20:54:05,175 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem17_label05.c [2019-09-09 20:54:05,212 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/715d866f7/9310225538614560a7eb78e5d6cf83bf/FLAG24dcea249 [2019-09-09 20:54:05,301 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/715d866f7/9310225538614560a7eb78e5d6cf83bf [2019-09-09 20:54:05,315 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 20:54:05,316 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 20:54:05,319 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 20:54:05,319 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 20:54:05,323 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 20:54:05,324 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 08:54:05" (1/1) ... [2019-09-09 20:54:05,327 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63f255d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:54:05, skipping insertion in model container [2019-09-09 20:54:05,327 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 08:54:05" (1/1) ... [2019-09-09 20:54:05,336 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 20:54:05,447 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 20:54:06,564 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 20:54:06,571 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 20:54:07,076 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 20:54:07,102 INFO L192 MainTranslator]: Completed translation [2019-09-09 20:54:07,103 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:54:07 WrapperNode [2019-09-09 20:54:07,103 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 20:54:07,104 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 20:54:07,104 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 20:54:07,104 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 20:54:07,119 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:54:07" (1/1) ... [2019-09-09 20:54:07,121 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:54:07" (1/1) ... [2019-09-09 20:54:07,175 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:54:07" (1/1) ... [2019-09-09 20:54:07,175 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:54:07" (1/1) ... [2019-09-09 20:54:07,321 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:54:07" (1/1) ... [2019-09-09 20:54:07,354 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:54:07" (1/1) ... [2019-09-09 20:54:07,383 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:54:07" (1/1) ... [2019-09-09 20:54:07,405 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 20:54:07,406 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 20:54:07,406 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 20:54:07,406 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 20:54:07,407 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:54:07" (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 20:54:07,471 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 20:54:07,472 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 20:54:07,472 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 20:54:07,472 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-09-09 20:54:07,472 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 20:54:07,472 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 20:54:07,473 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-09-09 20:54:07,473 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 20:54:07,473 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 20:54:07,473 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 20:54:07,473 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 20:54:07,473 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 20:54:07,474 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 20:54:12,303 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 20:54:12,304 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 20:54:12,305 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 08:54:12 BoogieIcfgContainer [2019-09-09 20:54:12,306 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 20:54:12,307 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 20:54:12,307 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 20:54:12,310 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 20:54:12,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 08:54:05" (1/3) ... [2019-09-09 20:54:12,311 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40b32855 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 08:54:12, skipping insertion in model container [2019-09-09 20:54:12,312 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:54:07" (2/3) ... [2019-09-09 20:54:12,312 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40b32855 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 08:54:12, skipping insertion in model container [2019-09-09 20:54:12,312 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 08:54:12" (3/3) ... [2019-09-09 20:54:12,314 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem17_label05.c [2019-09-09 20:54:12,325 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 20:54:12,335 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 20:54:12,352 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 20:54:12,380 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 20:54:12,380 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 20:54:12,380 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 20:54:12,381 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 20:54:12,381 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 20:54:12,381 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 20:54:12,381 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 20:54:12,381 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 20:54:12,427 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states. [2019-09-09 20:54:12,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-09-09 20:54:12,446 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 20:54:12,447 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 20:54:12,449 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 20:54:12,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 20:54:12,455 INFO L82 PathProgramCache]: Analyzing trace with hash -1186174567, now seen corresponding path program 1 times [2019-09-09 20:54:12,457 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 20:54:12,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:54:12,512 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 20:54:12,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:54:12,513 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 20:54:12,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 20:54:12,874 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 20:54:12,876 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 20:54:12,877 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 20:54:12,877 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 20:54:12,882 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 20:54:12,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 20:54:12,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 20:54:12,900 INFO L87 Difference]: Start difference. First operand 603 states. Second operand 4 states. [2019-09-09 20:54:18,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 20:54:18,817 INFO L93 Difference]: Finished difference Result 1565 states and 2620 transitions. [2019-09-09 20:54:18,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 20:54:18,819 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2019-09-09 20:54:18,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 20:54:18,857 INFO L225 Difference]: With dead ends: 1565 [2019-09-09 20:54:18,857 INFO L226 Difference]: Without dead ends: 1478 [2019-09-09 20:54:18,859 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 20:54:18,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1478 states. [2019-09-09 20:54:18,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1478 to 1006. [2019-09-09 20:54:18,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1006 states. [2019-09-09 20:54:18,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1006 states to 1006 states and 1697 transitions. [2019-09-09 20:54:18,999 INFO L78 Accepts]: Start accepts. Automaton has 1006 states and 1697 transitions. Word has length 67 [2019-09-09 20:54:19,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 20:54:19,000 INFO L475 AbstractCegarLoop]: Abstraction has 1006 states and 1697 transitions. [2019-09-09 20:54:19,000 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 20:54:19,000 INFO L276 IsEmpty]: Start isEmpty. Operand 1006 states and 1697 transitions. [2019-09-09 20:54:19,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-09-09 20:54:19,012 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 20:54:19,012 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] [2019-09-09 20:54:19,013 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 20:54:19,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 20:54:19,013 INFO L82 PathProgramCache]: Analyzing trace with hash -210431401, now seen corresponding path program 1 times [2019-09-09 20:54:19,013 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 20:54:19,016 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:54:19,016 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 20:54:19,016 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:54:19,016 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 20:54:19,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 20:54:19,310 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 20:54:19,311 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 20:54:19,311 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 20:54:19,311 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 20:54:19,313 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 20:54:19,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 20:54:19,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 20:54:19,314 INFO L87 Difference]: Start difference. First operand 1006 states and 1697 transitions. Second operand 6 states. [2019-09-09 20:54:23,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 20:54:23,912 INFO L93 Difference]: Finished difference Result 1931 states and 2979 transitions. [2019-09-09 20:54:23,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 20:54:23,914 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 142 [2019-09-09 20:54:23,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 20:54:23,928 INFO L225 Difference]: With dead ends: 1931 [2019-09-09 20:54:23,928 INFO L226 Difference]: Without dead ends: 1931 [2019-09-09 20:54:23,929 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 20:54:23,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1931 states. [2019-09-09 20:54:23,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1931 to 1911. [2019-09-09 20:54:23,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1911 states. [2019-09-09 20:54:23,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1911 states to 1911 states and 2935 transitions. [2019-09-09 20:54:23,992 INFO L78 Accepts]: Start accepts. Automaton has 1911 states and 2935 transitions. Word has length 142 [2019-09-09 20:54:23,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 20:54:23,993 INFO L475 AbstractCegarLoop]: Abstraction has 1911 states and 2935 transitions. [2019-09-09 20:54:23,993 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 20:54:23,993 INFO L276 IsEmpty]: Start isEmpty. Operand 1911 states and 2935 transitions. [2019-09-09 20:54:23,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-09-09 20:54:23,998 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 20:54:23,998 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] [2019-09-09 20:54:23,998 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 20:54:23,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 20:54:23,999 INFO L82 PathProgramCache]: Analyzing trace with hash -1149532705, now seen corresponding path program 1 times [2019-09-09 20:54:23,999 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 20:54:24,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:54:24,000 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 20:54:24,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:54:24,001 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 20:54:24,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 20:54:24,121 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 20:54:24,122 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 20:54:24,122 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 20:54:24,122 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 20:54:24,123 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 20:54:24,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 20:54:24,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 20:54:24,124 INFO L87 Difference]: Start difference. First operand 1911 states and 2935 transitions. Second operand 6 states. [2019-09-09 20:54:28,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 20:54:28,724 INFO L93 Difference]: Finished difference Result 2841 states and 3676 transitions. [2019-09-09 20:54:28,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 20:54:28,726 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 146 [2019-09-09 20:54:28,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 20:54:28,741 INFO L225 Difference]: With dead ends: 2841 [2019-09-09 20:54:28,742 INFO L226 Difference]: Without dead ends: 2841 [2019-09-09 20:54:28,746 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 20:54:28,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2841 states. [2019-09-09 20:54:28,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2841 to 2819. [2019-09-09 20:54:28,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2819 states. [2019-09-09 20:54:28,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2819 states to 2819 states and 3606 transitions. [2019-09-09 20:54:28,852 INFO L78 Accepts]: Start accepts. Automaton has 2819 states and 3606 transitions. Word has length 146 [2019-09-09 20:54:28,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 20:54:28,853 INFO L475 AbstractCegarLoop]: Abstraction has 2819 states and 3606 transitions. [2019-09-09 20:54:28,853 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 20:54:28,853 INFO L276 IsEmpty]: Start isEmpty. Operand 2819 states and 3606 transitions. [2019-09-09 20:54:28,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2019-09-09 20:54:28,860 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 20:54:28,861 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] [2019-09-09 20:54:28,861 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 20:54:28,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 20:54:28,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1205605410, now seen corresponding path program 1 times [2019-09-09 20:54:28,862 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 20:54:28,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:54:28,863 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 20:54:28,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:54:28,863 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 20:54:28,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 20:54:29,071 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 20:54:29,072 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 20:54:29,072 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 20:54:29,072 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 20:54:29,074 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 20:54:29,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 20:54:29,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 20:54:29,075 INFO L87 Difference]: Start difference. First operand 2819 states and 3606 transitions. Second operand 4 states. [2019-09-09 20:54:33,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 20:54:33,099 INFO L93 Difference]: Finished difference Result 2819 states and 3569 transitions. [2019-09-09 20:54:33,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 20:54:33,099 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 176 [2019-09-09 20:54:33,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 20:54:33,112 INFO L225 Difference]: With dead ends: 2819 [2019-09-09 20:54:33,113 INFO L226 Difference]: Without dead ends: 2819 [2019-09-09 20:54:33,113 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 20:54:33,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2819 states. [2019-09-09 20:54:33,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2819 to 2819. [2019-09-09 20:54:33,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2819 states. [2019-09-09 20:54:33,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2819 states to 2819 states and 3569 transitions. [2019-09-09 20:54:33,172 INFO L78 Accepts]: Start accepts. Automaton has 2819 states and 3569 transitions. Word has length 176 [2019-09-09 20:54:33,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 20:54:33,172 INFO L475 AbstractCegarLoop]: Abstraction has 2819 states and 3569 transitions. [2019-09-09 20:54:33,173 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 20:54:33,173 INFO L276 IsEmpty]: Start isEmpty. Operand 2819 states and 3569 transitions. [2019-09-09 20:54:33,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2019-09-09 20:54:33,177 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 20:54:33,177 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, 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 20:54:33,177 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 20:54:33,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 20:54:33,178 INFO L82 PathProgramCache]: Analyzing trace with hash -1572599359, now seen corresponding path program 1 times [2019-09-09 20:54:33,178 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 20:54:33,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:54:33,179 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 20:54:33,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:54:33,179 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 20:54:33,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 20:54:33,365 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 123 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2019-09-09 20:54:33,365 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 20:54:33,366 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 20:54:33,366 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 20:54:33,366 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 20:54:33,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 20:54:33,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 20:54:33,367 INFO L87 Difference]: Start difference. First operand 2819 states and 3569 transitions. Second operand 4 states. [2019-09-09 20:54:38,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 20:54:38,512 INFO L93 Difference]: Finished difference Result 8117 states and 9855 transitions. [2019-09-09 20:54:38,513 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 20:54:38,513 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 229 [2019-09-09 20:54:38,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 20:54:38,548 INFO L225 Difference]: With dead ends: 8117 [2019-09-09 20:54:38,548 INFO L226 Difference]: Without dead ends: 8117 [2019-09-09 20:54:38,549 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 20:54:38,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8117 states. [2019-09-09 20:54:38,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8117 to 7234. [2019-09-09 20:54:38,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7234 states. [2019-09-09 20:54:38,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7234 states to 7234 states and 8899 transitions. [2019-09-09 20:54:38,748 INFO L78 Accepts]: Start accepts. Automaton has 7234 states and 8899 transitions. Word has length 229 [2019-09-09 20:54:38,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 20:54:38,750 INFO L475 AbstractCegarLoop]: Abstraction has 7234 states and 8899 transitions. [2019-09-09 20:54:38,750 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 20:54:38,750 INFO L276 IsEmpty]: Start isEmpty. Operand 7234 states and 8899 transitions. [2019-09-09 20:54:38,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2019-09-09 20:54:38,756 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 20:54:38,757 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:54:38,757 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 20:54:38,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 20:54:38,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1141635154, now seen corresponding path program 1 times [2019-09-09 20:54:38,758 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 20:54:38,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:54:38,762 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 20:54:38,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:54:38,762 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 20:54:38,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 20:54:39,048 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 137 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 20:54:39,049 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 20:54:39,049 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 20:54:39,049 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 253 with the following transitions: [2019-09-09 20:54:39,052 INFO L207 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [942], [950], [958], [966], [974], [982], [990], [998], [1006], [1014], [1022], [1030], [1038], [1046], [1054], [1062], [1070], [1078], [1086], [1094], [1102], [1110], [1118], [1126], [1134], [1142], [1150], [1154], [1156], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1228], [1231], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1283], [1287], [1291], [1295], [1299], [1303], [1307], [1318], [1322], [1326], [1330], [1334], [1345], [1349], [1353], [1357], [1361], [1365], [1369], [1373], [1377], [1381], [1384], [2279], [2283], [2292], [2296], [2298], [2305], [2306], [2307], [2309], [2310] [2019-09-09 20:54:39,106 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 20:54:39,106 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 20:54:45,787 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 20:54:45,789 INFO L272 AbstractInterpreter]: Visited 114 different actions 114 times. Never merged. Never widened. Performed 250 root evaluator evaluations with a maximum evaluation depth of 15. Performed 250 inverse root evaluator evaluations with a maximum inverse evaluation depth of 15. Never found a fixpoint. Largest state had 26 variables. [2019-09-09 20:54:45,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 20:54:45,794 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 20:54:52,316 INFO L227 lantSequenceWeakener]: Weakened 233 states. On average, predicates are now at 75.99% of their original sizes. [2019-09-09 20:54:52,316 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 20:54:52,415 INFO L420 sIntCurrentIteration]: We unified 251 AI predicates to 251 [2019-09-09 20:54:52,415 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 20:54:52,416 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 20:54:52,417 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [7] total 16 [2019-09-09 20:54:52,417 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 20:54:52,418 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-09 20:54:52,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-09 20:54:52,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2019-09-09 20:54:52,418 INFO L87 Difference]: Start difference. First operand 7234 states and 8899 transitions. Second operand 11 states. [2019-09-09 20:55:04,283 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.