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/Problem10_label27.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-02 18:51:46,543 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-02 18:51:46,545 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-02 18:51:46,557 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-02 18:51:46,567 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-02 18:51:46,568 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-02 18:51:46,569 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-02 18:51:46,570 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-02 18:51:46,571 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-02 18:51:46,572 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-02 18:51:46,574 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-02 18:51:46,576 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-02 18:51:46,577 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-02 18:51:46,578 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-02 18:51:46,580 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-02 18:51:46,580 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-02 18:51:46,583 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-02 18:51:46,586 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-02 18:51:46,587 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-02 18:51:46,587 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-02 18:51:46,588 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-02 18:51:46,589 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-02 18:51:46,589 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-02 18:51:46,590 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-02 18:51:46,590 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-02 18:51:46,590 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-02 18:51:46,591 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-02 18:51:46,592 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-02 18:51:46,593 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 18:51:46,608 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-02 18:51:46,609 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-02 18:51:46,609 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-10-02 18:51:46,609 INFO L138 SettingsManager]: * Log level for plugins=info [2019-10-02 18:51:46,610 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-02 18:51:46,610 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-02 18:51:46,610 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-10-02 18:51:46,611 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-10-02 18:51:46,611 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-02 18:51:46,611 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-10-02 18:51:46,612 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-02 18:51:46,612 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-02 18:51:46,612 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-02 18:51:46,612 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-02 18:51:46,612 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-02 18:51:46,613 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-02 18:51:46,613 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-02 18:51:46,613 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-02 18:51:46,613 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-02 18:51:46,613 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-02 18:51:46,614 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-02 18:51:46,614 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-10-02 18:51:46,614 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-02 18:51:46,615 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 18:51:46,616 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-02 18:51:46,616 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-02 18:51:46,616 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-02 18:51:46,616 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-02 18:51:46,616 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-02 18:51:46,617 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-10-02 18:51:46,654 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-02 18:51:46,668 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-02 18:51:46,672 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-02 18:51:46,673 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-02 18:51:46,674 INFO L275 PluginConnector]: CDTParser initialized [2019-10-02 18:51:46,674 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label27.c [2019-10-02 18:51:46,747 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71b7c28f9/db665def5ccc46bb9ff2ca555934a8a3/FLAGaecedfd91 [2019-10-02 18:51:47,317 INFO L306 CDTParser]: Found 1 translation units. [2019-10-02 18:51:47,318 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label27.c [2019-10-02 18:51:47,347 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71b7c28f9/db665def5ccc46bb9ff2ca555934a8a3/FLAGaecedfd91 [2019-10-02 18:51:47,591 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71b7c28f9/db665def5ccc46bb9ff2ca555934a8a3 [2019-10-02 18:51:47,600 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-02 18:51:47,601 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-02 18:51:47,602 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-02 18:51:47,602 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-02 18:51:47,606 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-02 18:51:47,607 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 06:51:47" (1/1) ... [2019-10-02 18:51:47,609 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57118955 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 06:51:47, skipping insertion in model container [2019-10-02 18:51:47,610 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 06:51:47" (1/1) ... [2019-10-02 18:51:47,617 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-02 18:51:47,675 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-02 18:51:48,379 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 18:51:48,383 INFO L188 MainTranslator]: Completed pre-run [2019-10-02 18:51:48,498 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 18:51:48,520 INFO L192 MainTranslator]: Completed translation [2019-10-02 18:51:48,520 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 06:51:48 WrapperNode [2019-10-02 18:51:48,521 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-02 18:51:48,521 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-02 18:51:48,522 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-02 18:51:48,522 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-02 18:51:48,536 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 06:51:48" (1/1) ... [2019-10-02 18:51:48,536 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 06:51:48" (1/1) ... [2019-10-02 18:51:48,556 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 06:51:48" (1/1) ... [2019-10-02 18:51:48,556 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 06:51:48" (1/1) ... [2019-10-02 18:51:48,598 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 06:51:48" (1/1) ... [2019-10-02 18:51:48,625 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 06:51:48" (1/1) ... [2019-10-02 18:51:48,638 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 06:51:48" (1/1) ... [2019-10-02 18:51:48,649 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-02 18:51:48,650 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-02 18:51:48,650 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-02 18:51:48,650 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-02 18:51:48,651 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 06:51:48" (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 18:51:48,721 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-02 18:51:48,721 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-02 18:51:48,721 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-02 18:51:48,722 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-02 18:51:48,722 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-02 18:51:48,722 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-02 18:51:48,722 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-02 18:51:48,722 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-02 18:51:48,723 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-02 18:51:48,723 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-02 18:51:48,723 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-02 18:51:50,148 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-02 18:51:50,149 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-02 18:51:50,151 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 06:51:50 BoogieIcfgContainer [2019-10-02 18:51:50,152 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-02 18:51:50,154 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-02 18:51:50,155 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-02 18:51:50,160 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-02 18:51:50,160 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.10 06:51:47" (1/3) ... [2019-10-02 18:51:50,161 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26d731a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 06:51:50, skipping insertion in model container [2019-10-02 18:51:50,161 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 06:51:48" (2/3) ... [2019-10-02 18:51:50,162 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26d731a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 06:51:50, skipping insertion in model container [2019-10-02 18:51:50,162 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 06:51:50" (3/3) ... [2019-10-02 18:51:50,164 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label27.c [2019-10-02 18:51:50,178 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-02 18:51:50,190 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-02 18:51:50,211 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-02 18:51:50,251 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-02 18:51:50,252 INFO L378 AbstractCegarLoop]: Hoare is false [2019-10-02 18:51:50,252 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-02 18:51:50,253 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-02 18:51:50,253 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-02 18:51:50,253 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-02 18:51:50,253 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-02 18:51:50,254 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-02 18:51:50,291 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2019-10-02 18:51:50,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-10-02 18:51:50,307 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 18:51:50,308 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, 1, 1, 1] [2019-10-02 18:51:50,310 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 18:51:50,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 18:51:50,317 INFO L82 PathProgramCache]: Analyzing trace with hash 215216599, now seen corresponding path program 1 times [2019-10-02 18:51:50,319 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 18:51:50,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 18:51:50,381 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 18:51:50,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 18:51:50,382 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 18:51:50,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 18:51:50,711 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 18:51:50,713 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 18:51:50,714 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-02 18:51:50,714 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 18:51:50,720 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-02 18:51:50,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-02 18:51:50,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 18:51:50,739 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 4 states. [2019-10-02 18:51:52,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 18:51:52,385 INFO L93 Difference]: Finished difference Result 524 states and 830 transitions. [2019-10-02 18:51:52,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-02 18:51:52,387 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 66 [2019-10-02 18:51:52,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 18:51:52,421 INFO L225 Difference]: With dead ends: 524 [2019-10-02 18:51:52,423 INFO L226 Difference]: Without dead ends: 437 [2019-10-02 18:51:52,425 INFO L640 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 [2019-10-02 18:51:52,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2019-10-02 18:51:52,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 294. [2019-10-02 18:51:52,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2019-10-02 18:51:52,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 446 transitions. [2019-10-02 18:51:52,542 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 446 transitions. Word has length 66 [2019-10-02 18:51:52,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 18:51:52,543 INFO L475 AbstractCegarLoop]: Abstraction has 294 states and 446 transitions. [2019-10-02 18:51:52,543 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-02 18:51:52,543 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 446 transitions. [2019-10-02 18:51:52,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-10-02 18:51:52,550 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 18:51:52,551 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, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 18:51:52,551 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 18:51:52,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 18:51:52,551 INFO L82 PathProgramCache]: Analyzing trace with hash -51785766, now seen corresponding path program 1 times [2019-10-02 18:51:52,552 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 18:51:52,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 18:51:52,553 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 18:51:52,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 18:51:52,554 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 18:51:52,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 18:51:52,837 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-02 18:51:52,838 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 18:51:52,838 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 18:51:52,839 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 137 with the following transitions: [2019-10-02 18:51:52,842 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [433], [437], [439], [442], [450], [458], [466], [474], [482], [490], [495], [498], [792], [796], [805], [809], [811], [816], [817], [818], [820], [821] [2019-10-02 18:51:52,895 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 18:51:52,896 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 18:51:57,366 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-10-02 18:52:04,215 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 18:52:04,218 INFO L272 AbstractInterpreter]: Visited 77 different actions 148 times. Merged at 4 different actions 4 times. Never widened. Performed 326 root evaluator evaluations with a maximum evaluation depth of 12. Performed 326 inverse root evaluator evaluations with a maximum inverse evaluation depth of 12. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-10-02 18:52:04,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 18:52:04,222 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-02 18:52:13,531 INFO L227 lantSequenceWeakener]: Weakened 133 states. On average, predicates are now at 74.19% of their original sizes. [2019-10-02 18:52:13,532 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-10-02 18:52:13,619 INFO L420 sIntCurrentIteration]: We unified 135 AI predicates to 135 [2019-10-02 18:52:13,619 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-02 18:52:13,620 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 18:52:13,620 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [4] total 12 [2019-10-02 18:52:13,621 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 18:52:13,622 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-02 18:52:13,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-02 18:52:13,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-10-02 18:52:13,623 INFO L87 Difference]: Start difference. First operand 294 states and 446 transitions. Second operand 10 states. [2019-10-02 18:58:19,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 18:58:19,211 INFO L93 Difference]: Finished difference Result 584 states and 755 transitions. [2019-10-02 18:58:19,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-02 18:58:19,212 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 136 [2019-10-02 18:58:19,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 18:58:19,222 INFO L225 Difference]: With dead ends: 584 [2019-10-02 18:58:19,222 INFO L226 Difference]: Without dead ends: 584 [2019-10-02 18:58:19,224 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2019-10-02 18:58:19,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2019-10-02 18:58:19,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 582. [2019-10-02 18:58:19,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 582 states. [2019-10-02 18:58:19,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 753 transitions. [2019-10-02 18:58:19,282 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 753 transitions. Word has length 136 [2019-10-02 18:58:19,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 18:58:19,283 INFO L475 AbstractCegarLoop]: Abstraction has 582 states and 753 transitions. [2019-10-02 18:58:19,284 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-02 18:58:19,284 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 753 transitions. [2019-10-02 18:58:19,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2019-10-02 18:58:19,295 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 18:58:19,295 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, 3, 3, 3, 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] [2019-10-02 18:58:19,296 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 18:58:19,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 18:58:19,297 INFO L82 PathProgramCache]: Analyzing trace with hash 382273466, now seen corresponding path program 1 times [2019-10-02 18:58:19,297 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 18:58:19,298 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 18:58:19,299 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 18:58:19,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 18:58:19,299 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 18:58:19,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 18:58:19,585 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2019-10-02 18:58:19,586 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 18:58:19,586 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 18:58:19,586 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 212 with the following transitions: [2019-10-02 18:58:19,587 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [433], [437], [439], [442], [450], [458], [466], [474], [482], [490], [495], [498], [499], [503], [507], [511], [515], [518], [792], [796], [805], [809], [811], [816], [817], [818], [820], [821] [2019-10-02 18:58:19,591 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 18:58:19,591 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 18:58:22,329 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-10-02 18:58:58,989 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 18:58:58,989 INFO L272 AbstractInterpreter]: Visited 83 different actions 241 times. Merged at 6 different actions 12 times. Never widened. Performed 580 root evaluator evaluations with a maximum evaluation depth of 16. Performed 580 inverse root evaluator evaluations with a maximum inverse evaluation depth of 16. Found 3 fixpoints after 2 different actions. Largest state had 24 variables. [2019-10-02 18:58:58,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 18:58:58,990 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-02 18:59:20,585 INFO L227 lantSequenceWeakener]: Weakened 208 states. On average, predicates are now at 73.69% of their original sizes. [2019-10-02 18:59:20,585 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-10-02 18:59:20,681 INFO L420 sIntCurrentIteration]: We unified 210 AI predicates to 210 [2019-10-02 18:59:20,681 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-02 18:59:20,681 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 18:59:20,682 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [4] total 12 [2019-10-02 18:59:20,682 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 18:59:20,683 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-02 18:59:20,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-02 18:59:20,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-10-02 18:59:20,684 INFO L87 Difference]: Start difference. First operand 582 states and 753 transitions. Second operand 10 states. [2019-10-02 19:05:54,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 19:05:54,146 INFO L93 Difference]: Finished difference Result 737 states and 922 transitions. [2019-10-02 19:05:54,146 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-02 19:05:54,147 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 211 [2019-10-02 19:05:54,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 19:05:54,152 INFO L225 Difference]: With dead ends: 737 [2019-10-02 19:05:54,152 INFO L226 Difference]: Without dead ends: 737 [2019-10-02 19:05:54,153 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2019-10-02 19:05:54,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2019-10-02 19:05:54,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 727. [2019-10-02 19:05:54,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 727 states. [2019-10-02 19:05:54,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 727 states to 727 states and 910 transitions. [2019-10-02 19:05:54,180 INFO L78 Accepts]: Start accepts. Automaton has 727 states and 910 transitions. Word has length 211 [2019-10-02 19:05:54,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 19:05:54,181 INFO L475 AbstractCegarLoop]: Abstraction has 727 states and 910 transitions. [2019-10-02 19:05:54,181 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-02 19:05:54,181 INFO L276 IsEmpty]: Start isEmpty. Operand 727 states and 910 transitions. [2019-10-02 19:05:54,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2019-10-02 19:05:54,185 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 19:05:54,186 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, 3, 3, 3, 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] [2019-10-02 19:05:54,186 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 19:05:54,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:05:54,187 INFO L82 PathProgramCache]: Analyzing trace with hash 1865512755, now seen corresponding path program 1 times [2019-10-02 19:05:54,187 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 19:05:54,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:05:54,188 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 19:05:54,189 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:05:54,189 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 19:05:54,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 19:05:54,414 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 119 proven. 5 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2019-10-02 19:05:54,415 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 19:05:54,415 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 19:05:54,415 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 227 with the following transitions: [2019-10-02 19:05:54,416 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [433], [437], [439], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [534], [535], [539], [542], [792], [796], [805], [809], [811], [816], [817], [818], [820], [821] [2019-10-02 19:05:54,420 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 19:05:54,420 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 19:06:05,350 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.