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_label07.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 20:54:15,265 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 20:54:15,267 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 20:54:15,279 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 20:54:15,310 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-09 20:54:15,311 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-09 20:54:15,312 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-09 20:54:15,313 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-09 20:54:15,314 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-09 20:54:15,315 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-09 20:54:15,315 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-09 20:54:15,316 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-09 20:54:15,316 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 20:54:15,317 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 20:54:15,318 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 20:54:15,318 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 20:54:15,345 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 20:54:15,346 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 20:54:15,346 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 20:54:15,346 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 20:54:15,347 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 20:54:15,348 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 20:54:15,348 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 20:54:15,348 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 20:54:15,348 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 20:54:15,349 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 20:54:15,349 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 20:54:15,350 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 20:54:15,350 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 20:54:15,350 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 20:54:15,351 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 20:54:15,351 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 20:54:15,352 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 20:54:15,352 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 20:54:15,352 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 20:54:15,352 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 20:54:15,353 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 20:54:15,353 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 20:54:15,353 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 20:54:15,353 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 20:54:15,354 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 20:54:15,354 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 20:54:15,354 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 20:54:15,354 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 20:54:15,354 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 20:54:15,355 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 20:54:15,410 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 20:54:15,425 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 20:54:15,428 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 20:54:15,430 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 20:54:15,430 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 20:54:15,431 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label07.c [2019-09-09 20:54:15,505 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d192419a9/109f3ed6eaa74f55b0e8f831244a79f3/FLAGd67993df2 [2019-09-09 20:54:16,227 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 20:54:16,228 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem17_label07.c [2019-09-09 20:54:16,260 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d192419a9/109f3ed6eaa74f55b0e8f831244a79f3/FLAGd67993df2 [2019-09-09 20:54:16,339 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d192419a9/109f3ed6eaa74f55b0e8f831244a79f3 [2019-09-09 20:54:16,351 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 20:54:16,353 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 20:54:16,359 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 20:54:16,359 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 20:54:16,363 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 20:54:16,364 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 08:54:16" (1/1) ... [2019-09-09 20:54:16,367 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59cde3c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:54:16, skipping insertion in model container [2019-09-09 20:54:16,367 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 08:54:16" (1/1) ... [2019-09-09 20:54:16,375 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 20:54:16,498 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 20:54:17,818 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 20:54:17,829 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 20:54:18,238 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 20:54:18,262 INFO L192 MainTranslator]: Completed translation [2019-09-09 20:54:18,263 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:54:18 WrapperNode [2019-09-09 20:54:18,263 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 20:54:18,264 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 20:54:18,265 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 20:54:18,265 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 20:54:18,280 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:54:18" (1/1) ... [2019-09-09 20:54:18,282 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:54:18" (1/1) ... [2019-09-09 20:54:18,338 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:54:18" (1/1) ... [2019-09-09 20:54:18,339 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:54:18" (1/1) ... [2019-09-09 20:54:18,425 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:54:18" (1/1) ... [2019-09-09 20:54:18,446 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:54:18" (1/1) ... [2019-09-09 20:54:18,478 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:54:18" (1/1) ... [2019-09-09 20:54:18,498 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 20:54:18,499 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 20:54:18,499 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 20:54:18,499 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 20:54:18,500 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:54:18" (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 20:54:18,627 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 20:54:18,627 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 20:54:18,627 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 20:54:18,628 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-09-09 20:54:18,628 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 20:54:18,628 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 20:54:18,629 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-09-09 20:54:18,629 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 20:54:18,629 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 20:54:18,629 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 20:54:18,630 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 20:54:18,630 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 20:54:18,630 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 20:54:22,445 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 20:54:22,445 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 20:54:22,447 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 08:54:22 BoogieIcfgContainer [2019-09-09 20:54:22,447 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 20:54:22,448 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 20:54:22,448 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 20:54:22,452 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 20:54:22,452 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 08:54:16" (1/3) ... [2019-09-09 20:54:22,453 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d45dc59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 08:54:22, skipping insertion in model container [2019-09-09 20:54:22,453 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:54:18" (2/3) ... [2019-09-09 20:54:22,453 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d45dc59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 08:54:22, skipping insertion in model container [2019-09-09 20:54:22,454 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 08:54:22" (3/3) ... [2019-09-09 20:54:22,455 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem17_label07.c [2019-09-09 20:54:22,466 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 20:54:22,474 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 20:54:22,493 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 20:54:22,523 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 20:54:22,523 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 20:54:22,523 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 20:54:22,523 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 20:54:22,523 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 20:54:22,523 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 20:54:22,524 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 20:54:22,524 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 20:54:22,555 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states. [2019-09-09 20:54:22,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-09-09 20:54:22,567 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 20:54:22,568 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] [2019-09-09 20:54:22,570 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 20:54:22,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 20:54:22,576 INFO L82 PathProgramCache]: Analyzing trace with hash -959393263, now seen corresponding path program 1 times [2019-09-09 20:54:22,579 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 20:54:22,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:54:22,639 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 20:54:22,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:54:22,639 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 20:54:22,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 20:54:22,971 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 20:54:22,974 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 20:54:22,974 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 20:54:22,974 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 20:54:22,980 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 20:54:22,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 20:54:22,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 20:54:22,998 INFO L87 Difference]: Start difference. First operand 603 states. Second operand 4 states. [2019-09-09 20:54:28,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 20:54:28,979 INFO L93 Difference]: Finished difference Result 1524 states and 2209 transitions. [2019-09-09 20:54:28,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 20:54:28,981 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2019-09-09 20:54:28,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 20:54:29,018 INFO L225 Difference]: With dead ends: 1524 [2019-09-09 20:54:29,018 INFO L226 Difference]: Without dead ends: 1439 [2019-09-09 20:54:29,020 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 20:54:29,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1439 states. [2019-09-09 20:54:29,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1439 to 981. [2019-09-09 20:54:29,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 981 states. [2019-09-09 20:54:29,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 981 states to 981 states and 1512 transitions. [2019-09-09 20:54:29,144 INFO L78 Accepts]: Start accepts. Automaton has 981 states and 1512 transitions. Word has length 33 [2019-09-09 20:54:29,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 20:54:29,144 INFO L475 AbstractCegarLoop]: Abstraction has 981 states and 1512 transitions. [2019-09-09 20:54:29,145 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 20:54:29,145 INFO L276 IsEmpty]: Start isEmpty. Operand 981 states and 1512 transitions. [2019-09-09 20:54:29,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-09-09 20:54:29,150 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 20:54:29,150 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:54:29,151 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 20:54:29,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 20:54:29,151 INFO L82 PathProgramCache]: Analyzing trace with hash -492974425, now seen corresponding path program 1 times [2019-09-09 20:54:29,152 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 20:54:29,153 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:54:29,153 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 20:54:29,153 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:54:29,154 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 20:54:29,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 20:54:29,295 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 20:54:29,296 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 20:54:29,296 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-09 20:54:29,296 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 20:54:29,298 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-09 20:54:29,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-09 20:54:29,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-09 20:54:29,299 INFO L87 Difference]: Start difference. First operand 981 states and 1512 transitions. Second operand 5 states. [2019-09-09 20:54:36,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 20:54:36,217 INFO L93 Difference]: Finished difference Result 1914 states and 2730 transitions. [2019-09-09 20:54:36,218 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 20:54:36,218 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 104 [2019-09-09 20:54:36,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 20:54:36,232 INFO L225 Difference]: With dead ends: 1914 [2019-09-09 20:54:36,233 INFO L226 Difference]: Without dead ends: 1914 [2019-09-09 20:54:36,234 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-09-09 20:54:36,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1914 states. [2019-09-09 20:54:36,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1914 to 1890. [2019-09-09 20:54:36,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1890 states. [2019-09-09 20:54:36,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1890 states to 1890 states and 2682 transitions. [2019-09-09 20:54:36,344 INFO L78 Accepts]: Start accepts. Automaton has 1890 states and 2682 transitions. Word has length 104 [2019-09-09 20:54:36,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 20:54:36,345 INFO L475 AbstractCegarLoop]: Abstraction has 1890 states and 2682 transitions. [2019-09-09 20:54:36,345 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-09 20:54:36,346 INFO L276 IsEmpty]: Start isEmpty. Operand 1890 states and 2682 transitions. [2019-09-09 20:54:36,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-09-09 20:54:36,356 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 20:54:36,357 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:54:36,357 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 20:54:36,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 20:54:36,358 INFO L82 PathProgramCache]: Analyzing trace with hash 1950584953, now seen corresponding path program 1 times [2019-09-09 20:54:36,358 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 20:54:36,359 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:54:36,360 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 20:54:36,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:54:36,360 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 20:54:36,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 20:54:36,600 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 20:54:36,601 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 20:54:36,601 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 20:54:36,601 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 20:54:36,603 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 20:54:36,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 20:54:36,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 20:54:36,604 INFO L87 Difference]: Start difference. First operand 1890 states and 2682 transitions. Second operand 4 states. [2019-09-09 20:54:41,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 20:54:41,613 INFO L93 Difference]: Finished difference Result 3672 states and 5056 transitions. [2019-09-09 20:54:41,614 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 20:54:41,614 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 107 [2019-09-09 20:54:41,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 20:54:41,635 INFO L225 Difference]: With dead ends: 3672 [2019-09-09 20:54:41,635 INFO L226 Difference]: Without dead ends: 3672 [2019-09-09 20:54:41,636 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 20:54:41,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3672 states. [2019-09-09 20:54:41,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3672 to 3669. [2019-09-09 20:54:41,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3669 states. [2019-09-09 20:54:41,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3669 states to 3669 states and 5050 transitions. [2019-09-09 20:54:41,730 INFO L78 Accepts]: Start accepts. Automaton has 3669 states and 5050 transitions. Word has length 107 [2019-09-09 20:54:41,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 20:54:41,731 INFO L475 AbstractCegarLoop]: Abstraction has 3669 states and 5050 transitions. [2019-09-09 20:54:41,731 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 20:54:41,731 INFO L276 IsEmpty]: Start isEmpty. Operand 3669 states and 5050 transitions. [2019-09-09 20:54:41,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-09-09 20:54:41,757 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 20:54:41,758 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:54:41,758 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 20:54:41,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 20:54:41,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1112598089, now seen corresponding path program 1 times [2019-09-09 20:54:41,759 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 20:54:41,760 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:54:41,760 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 20:54:41,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:54:41,761 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 20:54:41,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 20:54:41,859 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 20:54:41,860 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 20:54:41,860 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 20:54:41,860 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 20:54:41,861 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 20:54:41,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 20:54:41,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 20:54:41,863 INFO L87 Difference]: Start difference. First operand 3669 states and 5050 transitions. Second operand 6 states. [2019-09-09 20:54:45,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 20:54:45,709 INFO L93 Difference]: Finished difference Result 5511 states and 6723 transitions. [2019-09-09 20:54:45,710 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 20:54:45,710 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 112 [2019-09-09 20:54:45,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 20:54:45,737 INFO L225 Difference]: With dead ends: 5511 [2019-09-09 20:54:45,738 INFO L226 Difference]: Without dead ends: 5511 [2019-09-09 20:54:45,738 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 20:54:45,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5511 states. [2019-09-09 20:54:45,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5511 to 5481. [2019-09-09 20:54:45,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5481 states. [2019-09-09 20:54:45,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5481 states to 5481 states and 6602 transitions. [2019-09-09 20:54:45,878 INFO L78 Accepts]: Start accepts. Automaton has 5481 states and 6602 transitions. Word has length 112 [2019-09-09 20:54:45,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 20:54:45,879 INFO L475 AbstractCegarLoop]: Abstraction has 5481 states and 6602 transitions. [2019-09-09 20:54:45,879 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 20:54:45,880 INFO L276 IsEmpty]: Start isEmpty. Operand 5481 states and 6602 transitions. [2019-09-09 20:54:45,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2019-09-09 20:54:45,885 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 20:54:45,886 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-09-09 20:54:45,886 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 20:54:45,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 20:54:45,887 INFO L82 PathProgramCache]: Analyzing trace with hash -376220690, now seen corresponding path program 1 times [2019-09-09 20:54:45,887 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 20:54:45,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:54:45,888 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 20:54:45,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:54:45,888 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 20:54:45,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 20:54:46,228 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 99 proven. 33 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-09 20:54:46,229 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 20:54:46,229 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 20:54:46,230 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 207 with the following transitions: [2019-09-09 20:54:46,233 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], [882], [884], [887], [895], [903], [911], [919], [927], [935], [943], [951], [959], [967], [975], [983], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1278], [1279], [1282], [2279], [2283], [2292], [2296], [2298], [2305], [2306], [2307], [2309], [2310] [2019-09-09 20:54:46,297 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 20:54:46,297 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 20:54:52,656 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 20:55:05,193 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 20:55:05,195 INFO L272 AbstractInterpreter]: Visited 95 different actions 276 times. Merged at 6 different actions 11 times. Never widened. Performed 719 root evaluator evaluations with a maximum evaluation depth of 17. Performed 719 inverse root evaluator evaluations with a maximum inverse evaluation depth of 17. Found 3 fixpoints after 1 different actions. Largest state had 26 variables. [2019-09-09 20:55:05,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 20:55:05,200 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 20:55:13,258 INFO L227 lantSequenceWeakener]: Weakened 203 states. On average, predicates are now at 75.24% of their original sizes. [2019-09-09 20:55:13,259 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 20:55:13,352 INFO L420 sIntCurrentIteration]: We unified 205 AI predicates to 205 [2019-09-09 20:55:13,352 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 20:55:13,353 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 20:55:13,353 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [7] total 15 [2019-09-09 20:55:13,353 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 20:55:13,354 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-09 20:55:13,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-09 20:55:13,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-09-09 20:55:13,355 INFO L87 Difference]: Start difference. First operand 5481 states and 6602 transitions. Second operand 10 states.