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/Problem18_label18.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-02 21:57:29,252 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-02 21:57:29,254 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-02 21:57:29,265 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-02 21:57:29,275 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-02 21:57:29,275 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-02 21:57:29,276 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-02 21:57:29,277 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-02 21:57:29,278 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-02 21:57:29,279 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-02 21:57:29,281 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-02 21:57:29,283 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-02 21:57:29,284 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-02 21:57:29,285 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-02 21:57:29,286 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-02 21:57:29,287 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-02 21:57:29,290 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-02 21:57:29,293 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-02 21:57:29,294 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-02 21:57:29,294 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-02 21:57:29,295 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-02 21:57:29,296 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-02 21:57:29,296 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-02 21:57:29,297 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-02 21:57:29,297 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-02 21:57:29,298 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-02 21:57:29,299 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-02 21:57:29,299 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-02 21:57:29,300 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 [2019-10-02 21:57:29,315 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-02 21:57:29,315 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-02 21:57:29,316 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-10-02 21:57:29,316 INFO L138 SettingsManager]: * Log level for plugins=info [2019-10-02 21:57:29,316 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-02 21:57:29,317 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-02 21:57:29,317 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-10-02 21:57:29,317 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-10-02 21:57:29,317 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-02 21:57:29,317 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-10-02 21:57:29,318 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-02 21:57:29,318 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-02 21:57:29,318 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-02 21:57:29,319 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-02 21:57:29,319 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-02 21:57:29,319 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-02 21:57:29,319 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-02 21:57:29,319 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-02 21:57:29,320 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-02 21:57:29,320 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-02 21:57:29,320 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-02 21:57:29,320 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-10-02 21:57:29,320 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-02 21:57:29,321 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 21:57:29,321 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-02 21:57:29,321 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-02 21:57:29,321 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-02 21:57:29,321 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-02 21:57:29,322 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-02 21:57:29,322 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-10-02 21:57:29,349 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-02 21:57:29,362 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-02 21:57:29,366 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-02 21:57:29,367 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-02 21:57:29,368 INFO L275 PluginConnector]: CDTParser initialized [2019-10-02 21:57:29,368 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label18.c [2019-10-02 21:57:29,437 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2b84f552/199b189c58cb42c28b2b3a845b623794/FLAG260375721 [2019-10-02 21:57:30,148 INFO L306 CDTParser]: Found 1 translation units. [2019-10-02 21:57:30,149 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label18.c [2019-10-02 21:57:30,171 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2b84f552/199b189c58cb42c28b2b3a845b623794/FLAG260375721 [2019-10-02 21:57:30,274 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2b84f552/199b189c58cb42c28b2b3a845b623794 [2019-10-02 21:57:30,286 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-02 21:57:30,289 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-02 21:57:30,293 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-02 21:57:30,294 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-02 21:57:30,297 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-02 21:57:30,298 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 09:57:30" (1/1) ... [2019-10-02 21:57:30,301 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e83c3da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:57:30, skipping insertion in model container [2019-10-02 21:57:30,302 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 09:57:30" (1/1) ... [2019-10-02 21:57:30,309 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-02 21:57:30,449 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-02 21:57:31,628 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 21:57:31,634 INFO L188 MainTranslator]: Completed pre-run [2019-10-02 21:57:32,047 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 21:57:32,073 INFO L192 MainTranslator]: Completed translation [2019-10-02 21:57:32,074 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:57:32 WrapperNode [2019-10-02 21:57:32,074 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-02 21:57:32,075 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-02 21:57:32,075 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-02 21:57:32,075 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-02 21:57:32,089 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:57:32" (1/1) ... [2019-10-02 21:57:32,091 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:57:32" (1/1) ... [2019-10-02 21:57:32,131 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:57:32" (1/1) ... [2019-10-02 21:57:32,131 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:57:32" (1/1) ... [2019-10-02 21:57:32,227 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:57:32" (1/1) ... [2019-10-02 21:57:32,305 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:57:32" (1/1) ... [2019-10-02 21:57:32,331 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:57:32" (1/1) ... [2019-10-02 21:57:32,366 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-02 21:57:32,367 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-02 21:57:32,367 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-02 21:57:32,367 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-02 21:57:32,368 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:57:32" (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 [2019-10-02 21:57:32,441 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-02 21:57:32,442 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-02 21:57:32,442 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-02 21:57:32,442 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-02 21:57:32,442 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-10-02 21:57:32,443 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-02 21:57:32,443 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-02 21:57:32,443 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-02 21:57:32,443 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-10-02 21:57:32,443 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-02 21:57:32,444 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-02 21:57:32,445 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-02 21:57:32,446 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-02 21:57:32,447 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-02 21:57:32,447 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-02 21:57:36,192 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-02 21:57:36,192 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-02 21:57:36,194 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 09:57:36 BoogieIcfgContainer [2019-10-02 21:57:36,195 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-02 21:57:36,197 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-02 21:57:36,197 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-02 21:57:36,201 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-02 21:57:36,201 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.10 09:57:30" (1/3) ... [2019-10-02 21:57:36,203 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@308eca27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 09:57:36, skipping insertion in model container [2019-10-02 21:57:36,203 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:57:32" (2/3) ... [2019-10-02 21:57:36,204 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@308eca27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 09:57:36, skipping insertion in model container [2019-10-02 21:57:36,205 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 09:57:36" (3/3) ... [2019-10-02 21:57:36,208 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label18.c [2019-10-02 21:57:36,218 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-02 21:57:36,230 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-02 21:57:36,248 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-02 21:57:36,284 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-02 21:57:36,285 INFO L378 AbstractCegarLoop]: Hoare is false [2019-10-02 21:57:36,285 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-02 21:57:36,285 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-02 21:57:36,285 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-02 21:57:36,286 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-02 21:57:36,286 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-02 21:57:36,286 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-02 21:57:36,332 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states. [2019-10-02 21:57:36,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-10-02 21:57:36,348 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 21:57:36,349 INFO L411 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] [2019-10-02 21:57:36,352 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 21:57:36,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 21:57:36,359 INFO L82 PathProgramCache]: Analyzing trace with hash 269272858, now seen corresponding path program 1 times [2019-10-02 21:57:36,361 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 21:57:36,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:57:36,414 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 21:57:36,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:57:36,414 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 21:57:36,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 21:57:36,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 21:57:36,663 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 21:57:36,663 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-02 21:57:36,663 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 21:57:36,669 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-02 21:57:36,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-02 21:57:36,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 21:57:36,687 INFO L87 Difference]: Start difference. First operand 774 states. Second operand 3 states. [2019-10-02 21:57:41,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 21:57:41,389 INFO L93 Difference]: Finished difference Result 1480 states and 2747 transitions. [2019-10-02 21:57:41,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-02 21:57:41,392 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 63 [2019-10-02 21:57:41,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 21:57:41,434 INFO L225 Difference]: With dead ends: 1480 [2019-10-02 21:57:41,435 INFO L226 Difference]: Without dead ends: 1412 [2019-10-02 21:57:41,437 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 21:57:41,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1412 states. [2019-10-02 21:57:41,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1412 to 1412. [2019-10-02 21:57:41,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1412 states. [2019-10-02 21:57:41,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 2630 transitions. [2019-10-02 21:57:41,574 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 2630 transitions. Word has length 63 [2019-10-02 21:57:41,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 21:57:41,575 INFO L475 AbstractCegarLoop]: Abstraction has 1412 states and 2630 transitions. [2019-10-02 21:57:41,575 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-02 21:57:41,576 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 2630 transitions. [2019-10-02 21:57:41,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-10-02 21:57:41,583 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 21:57:41,584 INFO L411 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 21:57:41,584 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 21:57:41,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 21:57:41,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1668142983, now seen corresponding path program 1 times [2019-10-02 21:57:41,585 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 21:57:41,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:57:41,587 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 21:57:41,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:57:41,587 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 21:57:41,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 21:57:41,814 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 21:57:41,814 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 21:57:41,814 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-02 21:57:41,814 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 21:57:41,816 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 21:57:41,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 21:57:41,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-02 21:57:41,817 INFO L87 Difference]: Start difference. First operand 1412 states and 2630 transitions. Second operand 6 states. [2019-10-02 21:57:47,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 21:57:47,938 INFO L93 Difference]: Finished difference Result 2882 states and 5191 transitions. [2019-10-02 21:57:47,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 21:57:47,938 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 152 [2019-10-02 21:57:47,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 21:57:47,960 INFO L225 Difference]: With dead ends: 2882 [2019-10-02 21:57:47,960 INFO L226 Difference]: Without dead ends: 2882 [2019-10-02 21:57:47,961 INFO L640 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 [2019-10-02 21:57:47,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2882 states. [2019-10-02 21:57:48,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2882 to 2858. [2019-10-02 21:57:48,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2858 states. [2019-10-02 21:57:48,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2858 states to 2858 states and 5137 transitions. [2019-10-02 21:57:48,074 INFO L78 Accepts]: Start accepts. Automaton has 2858 states and 5137 transitions. Word has length 152 [2019-10-02 21:57:48,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 21:57:48,076 INFO L475 AbstractCegarLoop]: Abstraction has 2858 states and 5137 transitions. [2019-10-02 21:57:48,076 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 21:57:48,076 INFO L276 IsEmpty]: Start isEmpty. Operand 2858 states and 5137 transitions. [2019-10-02 21:57:48,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2019-10-02 21:57:48,091 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 21:57:48,092 INFO L411 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 21:57:48,093 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 21:57:48,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 21:57:48,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1811597990, now seen corresponding path program 1 times [2019-10-02 21:57:48,094 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 21:57:48,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:57:48,097 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 21:57:48,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:57:48,098 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 21:57:48,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 21:57:48,366 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 21:57:48,367 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 21:57:48,368 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-02 21:57:48,368 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 21:57:48,369 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 21:57:48,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 21:57:48,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-02 21:57:48,370 INFO L87 Difference]: Start difference. First operand 2858 states and 5137 transitions. Second operand 6 states. [2019-10-02 21:57:58,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 21:57:58,154 INFO L93 Difference]: Finished difference Result 8774 states and 14051 transitions. [2019-10-02 21:57:58,154 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-02 21:57:58,154 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 153 [2019-10-02 21:57:58,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 21:57:58,213 INFO L225 Difference]: With dead ends: 8774 [2019-10-02 21:57:58,214 INFO L226 Difference]: Without dead ends: 8774 [2019-10-02 21:57:58,215 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-10-02 21:57:58,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8774 states. [2019-10-02 21:57:58,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8774 to 8718. [2019-10-02 21:57:58,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8718 states. [2019-10-02 21:57:58,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8718 states to 8718 states and 13633 transitions. [2019-10-02 21:57:58,521 INFO L78 Accepts]: Start accepts. Automaton has 8718 states and 13633 transitions. Word has length 153 [2019-10-02 21:57:58,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 21:57:58,522 INFO L475 AbstractCegarLoop]: Abstraction has 8718 states and 13633 transitions. [2019-10-02 21:57:58,522 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 21:57:58,522 INFO L276 IsEmpty]: Start isEmpty. Operand 8718 states and 13633 transitions. [2019-10-02 21:57:58,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2019-10-02 21:57:58,529 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 21:57:58,530 INFO L411 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, 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] [2019-10-02 21:57:58,530 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 21:57:58,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 21:57:58,531 INFO L82 PathProgramCache]: Analyzing trace with hash -1951116309, now seen corresponding path program 1 times [2019-10-02 21:57:58,531 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 21:57:58,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:57:58,539 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 21:57:58,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:57:58,539 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 21:57:58,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 21:57:58,783 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 112 proven. 65 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-02 21:57:58,783 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 21:57:58,783 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 21:57:58,784 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 223 with the following transitions: [2019-10-02 21:57:58,787 INFO L207 CegarAbsIntRunner]: [0], [1], [1624], [1631], [1639], [1647], [1655], [1663], [1671], [1679], [1687], [1695], [1703], [1711], [1719], [1727], [1735], [1743], [1751], [1759], [1767], [1775], [1783], [1791], [1799], [1807], [1815], [1823], [1831], [1839], [1847], [1855], [1863], [1871], [1879], [1887], [1895], [1903], [1911], [1919], [1927], [1935], [1943], [1951], [1959], [1967], [1975], [1983], [1991], [1999], [2007], [2015], [2023], [2031], [2035], [2037], [2040], [2048], [2056], [2064], [2072], [2080], [2088], [2096], [2104], [2112], [2116], [2117], [2121], [2125], [2129], [2133], [2137], [2141], [2145], [2149], [2153], [2157], [2161], [2165], [2169], [2173], [2177], [2181], [2185], [2189], [2193], [2197], [2200], [2996], [3000], [3009], [3013], [3015], [3024], [3025], [3026], [3028], [3029] [2019-10-02 21:57:58,849 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 21:57:58,850 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 21:58:03,128 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 21:58:03,130 INFO L272 AbstractInterpreter]: Visited 95 different actions 95 times. Never merged. Never widened. Performed 229 root evaluator evaluations with a maximum evaluation depth of 13. Performed 229 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Never found a fixpoint. Largest state had 24 variables. [2019-10-02 21:58:03,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 21:58:03,135 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-02 21:58:05,965 INFO L227 lantSequenceWeakener]: Weakened 203 states. On average, predicates are now at 78.42% of their original sizes. [2019-10-02 21:58:05,965 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-10-02 21:58:06,063 INFO L420 sIntCurrentIteration]: We unified 221 AI predicates to 221 [2019-10-02 21:58:06,064 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-02 21:58:06,065 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 21:58:06,065 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [5] total 13 [2019-10-02 21:58:06,065 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 21:58:06,066 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-02 21:58:06,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-02 21:58:06,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-10-02 21:58:06,067 INFO L87 Difference]: Start difference. First operand 8718 states and 13633 transitions. Second operand 10 states. [2019-10-02 21:59:43,717 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.