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/recursive-simple/id_i5_o5-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-10 03:07:59,377 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-10 03:07:59,379 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-10 03:07:59,391 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-10 03:07:59,391 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-10 03:07:59,392 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-10 03:07:59,394 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-10 03:07:59,396 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-10 03:07:59,397 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-10 03:07:59,398 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-10 03:07:59,399 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-10 03:07:59,400 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2019-09-10 03:07:59,419 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-10 03:07:59,420 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-10 03:07:59,421 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-10 03:07:59,422 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-10 03:07:59,423 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-10 03:07:59,423 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-10 03:07:59,424 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-10 03:07:59,424 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-10 03:07:59,424 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-10 03:07:59,425 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-10 03:07:59,426 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-10 03:07:59,427 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 [2019-09-10 03:07:59,442 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-10 03:07:59,442 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-10 03:07:59,442 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-10 03:07:59,443 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-10 03:07:59,443 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-10 03:07:59,444 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-10 03:07:59,444 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-10 03:07:59,444 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-10 03:07:59,444 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-10 03:07:59,444 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-10 03:07:59,445 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-10 03:07:59,445 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-10 03:07:59,446 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-10 03:07:59,446 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-10 03:07:59,446 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-10 03:07:59,446 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-10 03:07:59,446 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-10 03:07:59,447 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-10 03:07:59,447 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-10 03:07:59,447 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-10 03:07:59,447 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-10 03:07:59,448 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-10 03:07:59,448 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-10 03:07:59,448 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-10 03:07:59,448 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-10 03:07:59,448 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-10 03:07:59,449 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-10 03:07:59,449 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-10 03:07:59,449 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-10 03:07:59,449 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-10 03:07:59,478 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-10 03:07:59,492 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-10 03:07:59,496 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-10 03:07:59,498 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-10 03:07:59,499 INFO L275 PluginConnector]: CDTParser initialized [2019-09-10 03:07:59,500 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_i5_o5-1.c [2019-09-10 03:07:59,582 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad972a682/21e3e6b8dda8498d95c2527b1545992e/FLAG855626bb6 [2019-09-10 03:08:00,012 INFO L306 CDTParser]: Found 1 translation units. [2019-09-10 03:08:00,013 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_i5_o5-1.c [2019-09-10 03:08:00,019 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad972a682/21e3e6b8dda8498d95c2527b1545992e/FLAG855626bb6 [2019-09-10 03:08:00,398 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad972a682/21e3e6b8dda8498d95c2527b1545992e [2019-09-10 03:08:00,406 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-10 03:08:00,408 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-10 03:08:00,409 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-10 03:08:00,409 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-10 03:08:00,413 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-10 03:08:00,414 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 03:08:00" (1/1) ... [2019-09-10 03:08:00,416 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@622febbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 03:08:00, skipping insertion in model container [2019-09-10 03:08:00,417 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 03:08:00" (1/1) ... [2019-09-10 03:08:00,424 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-10 03:08:00,438 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-10 03:08:00,604 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-10 03:08:00,609 INFO L188 MainTranslator]: Completed pre-run [2019-09-10 03:08:00,629 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-10 03:08:00,641 INFO L192 MainTranslator]: Completed translation [2019-09-10 03:08:00,642 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 03:08:00 WrapperNode [2019-09-10 03:08:00,642 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-10 03:08:00,643 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-10 03:08:00,643 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-10 03:08:00,643 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-10 03:08:00,732 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 03:08:00" (1/1) ... [2019-09-10 03:08:00,733 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 03:08:00" (1/1) ... [2019-09-10 03:08:00,738 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 03:08:00" (1/1) ... [2019-09-10 03:08:00,738 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 03:08:00" (1/1) ... [2019-09-10 03:08:00,742 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 03:08:00" (1/1) ... [2019-09-10 03:08:00,744 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 03:08:00" (1/1) ... [2019-09-10 03:08:00,744 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 03:08:00" (1/1) ... [2019-09-10 03:08:00,746 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-10 03:08:00,746 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-10 03:08:00,746 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-10 03:08:00,746 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-10 03:08:00,747 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 03:08:00" (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 [2019-09-10 03:08:00,803 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-10 03:08:00,803 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-10 03:08:00,803 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2019-09-10 03:08:00,803 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-10 03:08:00,803 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-10 03:08:00,804 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-10 03:08:00,804 INFO L130 BoogieDeclarations]: Found specification of procedure id [2019-09-10 03:08:00,804 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-10 03:08:00,804 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-10 03:08:00,804 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-10 03:08:00,952 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-10 03:08:00,952 INFO L283 CfgBuilder]: Removed 0 assume(true) statements. [2019-09-10 03:08:00,953 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 03:08:00 BoogieIcfgContainer [2019-09-10 03:08:00,953 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-10 03:08:00,954 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-10 03:08:00,954 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-10 03:08:00,957 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-10 03:08:00,958 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.09 03:08:00" (1/3) ... [2019-09-10 03:08:00,958 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30c9ebca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 03:08:00, skipping insertion in model container [2019-09-10 03:08:00,959 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 03:08:00" (2/3) ... [2019-09-10 03:08:00,959 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30c9ebca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 03:08:00, skipping insertion in model container [2019-09-10 03:08:00,959 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 03:08:00" (3/3) ... [2019-09-10 03:08:00,961 INFO L109 eAbstractionObserver]: Analyzing ICFG id_i5_o5-1.c [2019-09-10 03:08:00,969 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-10 03:08:00,975 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-10 03:08:00,992 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-10 03:08:01,019 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-10 03:08:01,019 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-10 03:08:01,019 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-10 03:08:01,019 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-10 03:08:01,020 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-10 03:08:01,020 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-10 03:08:01,020 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-10 03:08:01,020 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-10 03:08:01,035 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2019-09-10 03:08:01,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-09-10 03:08:01,045 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 03:08:01,046 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 03:08:01,048 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 03:08:01,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 03:08:01,054 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2019-09-10 03:08:01,057 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 03:08:01,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 03:08:01,100 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 03:08:01,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 03:08:01,100 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 03:08:01,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 03:08:01,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 03:08:01,278 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-10 03:08:01,279 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-10 03:08:01,279 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-10 03:08:01,284 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-10 03:08:01,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-10 03:08:01,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-10 03:08:01,306 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2019-09-10 03:08:01,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 03:08:01,443 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2019-09-10 03:08:01,444 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-10 03:08:01,446 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2019-09-10 03:08:01,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 03:08:01,456 INFO L225 Difference]: With dead ends: 22 [2019-09-10 03:08:01,456 INFO L226 Difference]: Without dead ends: 18 [2019-09-10 03:08:01,458 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-10 03:08:01,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-09-10 03:08:01,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-09-10 03:08:01,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-09-10 03:08:01,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2019-09-10 03:08:01,496 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2019-09-10 03:08:01,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 03:08:01,496 INFO L475 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2019-09-10 03:08:01,496 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-10 03:08:01,497 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2019-09-10 03:08:01,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-09-10 03:08:01,498 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 03:08:01,499 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 03:08:01,499 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 03:08:01,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 03:08:01,500 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2019-09-10 03:08:01,500 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 03:08:01,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 03:08:01,501 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 03:08:01,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 03:08:01,502 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 03:08:01,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 03:08:01,562 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-09-10 03:08:01,563 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 03:08:01,563 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-10 03:08:01,564 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 20 with the following transitions: [2019-09-10 03:08:01,566 INFO L207 CegarAbsIntRunner]: [0], [4], [6], [9], [11], [17], [20], [21], [23], [24], [25], [26], [27], [29], [30], [31], [32] [2019-09-10 03:08:01,600 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-10 03:08:01,601 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-10 03:08:01,787 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-10 03:08:01,790 INFO L272 AbstractInterpreter]: Visited 17 different actions 121 times. Merged at 5 different actions 57 times. Widened at 1 different actions 4 times. Performed 172 root evaluator evaluations with a maximum evaluation depth of 3. Performed 172 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 3 fixpoints after 2 different actions. Largest state had 4 variables. [2019-09-10 03:08:01,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 03:08:01,795 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-10 03:08:01,796 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 03:08:01,796 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-10 03:08:01,813 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 03:08:01,814 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-10 03:08:01,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 03:08:01,834 INFO L256 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-10 03:08:01,840 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 03:08:01,879 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-09-10 03:08:01,879 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 03:08:02,085 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 03:08:02,129 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-10 03:08:02,134 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-10 03:08:02,135 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 9 [2019-09-10 03:08:02,135 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-10 03:08:02,137 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-10 03:08:02,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-10 03:08:02,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-09-10 03:08:02,140 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2019-09-10 03:08:02,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 03:08:02,223 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2019-09-10 03:08:02,224 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-10 03:08:02,224 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2019-09-10 03:08:02,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 03:08:02,225 INFO L225 Difference]: With dead ends: 21 [2019-09-10 03:08:02,226 INFO L226 Difference]: Without dead ends: 21 [2019-09-10 03:08:02,227 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2019-09-10 03:08:02,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-09-10 03:08:02,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-09-10 03:08:02,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-09-10 03:08:02,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2019-09-10 03:08:02,238 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2019-09-10 03:08:02,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 03:08:02,240 INFO L475 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2019-09-10 03:08:02,240 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-10 03:08:02,241 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2019-09-10 03:08:02,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-09-10 03:08:02,242 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 03:08:02,243 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 03:08:02,243 INFO L418 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 03:08:02,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 03:08:02,244 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2019-09-10 03:08:02,248 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 03:08:02,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 03:08:02,251 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 03:08:02,251 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 03:08:02,251 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 03:08:02,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 03:08:02,380 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-09-10 03:08:02,381 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 03:08:02,381 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-10 03:08:02,381 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-09-10 03:08:02,381 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-10 03:08:02,382 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 03:08:02,382 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-10 03:08:02,397 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-10 03:08:02,398 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-09-10 03:08:02,415 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-09-10 03:08:02,416 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-10 03:08:02,416 INFO L256 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-10 03:08:02,419 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 03:08:02,432 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-09-10 03:08:02,432 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 03:08:02,687 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 03:08:02,750 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 03:08:02,808 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-09-10 03:08:02,812 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-10 03:08:02,812 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9] total 11 [2019-09-10 03:08:02,813 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-10 03:08:02,814 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-10 03:08:02,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-10 03:08:02,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2019-09-10 03:08:02,815 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 7 states. [2019-09-10 03:08:02,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 03:08:02,887 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2019-09-10 03:08:02,887 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-10 03:08:02,888 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2019-09-10 03:08:02,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 03:08:02,889 INFO L225 Difference]: With dead ends: 24 [2019-09-10 03:08:02,889 INFO L226 Difference]: Without dead ends: 24 [2019-09-10 03:08:02,890 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 43 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-09-10 03:08:02,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-09-10 03:08:02,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-09-10 03:08:02,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-09-10 03:08:02,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2019-09-10 03:08:02,896 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2019-09-10 03:08:02,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 03:08:02,896 INFO L475 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2019-09-10 03:08:02,896 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-10 03:08:02,896 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2019-09-10 03:08:02,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-09-10 03:08:02,898 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 03:08:02,898 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 03:08:02,898 INFO L418 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 03:08:02,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 03:08:02,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2019-09-10 03:08:02,899 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 03:08:02,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 03:08:02,900 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-10 03:08:02,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 03:08:02,900 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 03:08:02,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 03:08:02,999 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-09-10 03:08:02,999 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 03:08:02,999 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-10 03:08:03,000 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-09-10 03:08:03,000 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-10 03:08:03,000 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 03:08:03,000 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-10 03:08:03,018 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-10 03:08:03,019 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-10 03:08:03,034 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-10 03:08:03,034 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-10 03:08:03,035 INFO L256 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-10 03:08:03,037 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 03:08:03,061 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-09-10 03:08:03,061 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 03:08:03,425 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 03:08:03,539 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 03:08:03,601 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 03:08:03,633 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-10 03:08:03,637 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-10 03:08:03,637 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 11] total 13 [2019-09-10 03:08:03,637 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-10 03:08:03,638 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-10 03:08:03,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-10 03:08:03,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2019-09-10 03:08:03,639 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 8 states. [2019-09-10 03:08:03,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 03:08:03,707 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2019-09-10 03:08:03,708 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-10 03:08:03,708 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2019-09-10 03:08:03,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 03:08:03,709 INFO L225 Difference]: With dead ends: 27 [2019-09-10 03:08:03,709 INFO L226 Difference]: Without dead ends: 27 [2019-09-10 03:08:03,710 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 53 SyntacticMatches, 8 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2019-09-10 03:08:03,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-09-10 03:08:03,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-09-10 03:08:03,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-09-10 03:08:03,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2019-09-10 03:08:03,715 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2019-09-10 03:08:03,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 03:08:03,716 INFO L475 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2019-09-10 03:08:03,716 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-10 03:08:03,716 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2019-09-10 03:08:03,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-09-10 03:08:03,717 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 03:08:03,718 INFO L399 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 03:08:03,718 INFO L418 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 03:08:03,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 03:08:03,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1080764669, now seen corresponding path program 4 times [2019-09-10 03:08:03,718 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 03:08:03,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 03:08:03,720 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-10 03:08:03,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 03:08:03,720 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 03:08:03,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 03:08:03,803 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-09-10 03:08:03,804 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 03:08:03,804 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-10 03:08:03,804 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-09-10 03:08:03,804 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-10 03:08:03,804 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 03:08:03,805 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-10 03:08:03,820 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 03:08:03,820 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-10 03:08:03,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 03:08:03,837 INFO L256 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 12 conjunts are in the unsatisfiable core [2019-09-10 03:08:03,840 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 03:08:03,856 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-09-10 03:08:03,856 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 03:08:04,343 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 03:08:04,479 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 03:08:04,564 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 03:08:04,622 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 03:08:04,668 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-09-10 03:08:04,672 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-10 03:08:04,672 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 13] total 14 [2019-09-10 03:08:04,672 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-10 03:08:04,673 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-10 03:08:04,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-10 03:08:04,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2019-09-10 03:08:04,674 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 9 states. [2019-09-10 03:08:04,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 03:08:04,769 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2019-09-10 03:08:04,770 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-10 03:08:04,770 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2019-09-10 03:08:04,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 03:08:04,772 INFO L225 Difference]: With dead ends: 30 [2019-09-10 03:08:04,772 INFO L226 Difference]: Without dead ends: 30 [2019-09-10 03:08:04,772 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 63 SyntacticMatches, 11 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2019-09-10 03:08:04,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-09-10 03:08:04,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-09-10 03:08:04,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-09-10 03:08:04,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2019-09-10 03:08:04,778 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2019-09-10 03:08:04,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 03:08:04,778 INFO L475 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2019-09-10 03:08:04,778 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-10 03:08:04,778 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2019-09-10 03:08:04,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-09-10 03:08:04,780 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 03:08:04,780 INFO L399 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 03:08:04,780 INFO L418 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 03:08:04,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 03:08:04,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1752970513, now seen corresponding path program 5 times [2019-09-10 03:08:04,781 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 03:08:04,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 03:08:04,782 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 03:08:04,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 03:08:04,782 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 03:08:04,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-09-10 03:08:04,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-09-10 03:08:04,833 INFO L466 BasicCegarLoop]: Counterexample might be feasible [2019-09-10 03:08:04,885 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.09 03:08:04 BoogieIcfgContainer [2019-09-10 03:08:04,885 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-10 03:08:04,887 INFO L168 Benchmark]: Toolchain (without parser) took 4478.75 ms. Allocated memory was 132.6 MB in the beginning and 262.1 MB in the end (delta: 129.5 MB). Free memory was 88.7 MB in the beginning and 199.9 MB in the end (delta: -111.2 MB). Peak memory consumption was 18.3 MB. Max. memory is 7.1 GB. [2019-09-10 03:08:04,888 INFO L168 Benchmark]: CDTParser took 1.18 ms. Allocated memory is still 132.6 MB. Free memory was 107.2 MB in the beginning and 107.0 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-10 03:08:04,889 INFO L168 Benchmark]: CACSL2BoogieTranslator took 233.55 ms. Allocated memory is still 132.6 MB. Free memory was 88.3 MB in the beginning and 79.4 MB in the end (delta: 8.9 MB). Peak memory consumption was 8.9 MB. Max. memory is 7.1 GB. [2019-09-10 03:08:04,890 INFO L168 Benchmark]: Boogie Preprocessor took 103.35 ms. Allocated memory was 132.6 MB in the beginning and 199.2 MB in the end (delta: 66.6 MB). Free memory was 79.4 MB in the beginning and 176.2 MB in the end (delta: -96.8 MB). Peak memory consumption was 16.2 MB. Max. memory is 7.1 GB. [2019-09-10 03:08:04,891 INFO L168 Benchmark]: RCFGBuilder took 207.15 ms. Allocated memory is still 199.2 MB. Free memory was 176.2 MB in the beginning and 165.3 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. [2019-09-10 03:08:04,892 INFO L168 Benchmark]: TraceAbstraction took 3931.07 ms. Allocated memory was 199.2 MB in the beginning and 262.1 MB in the end (delta: 62.9 MB). Free memory was 164.6 MB in the beginning and 199.9 MB in the end (delta: -35.3 MB). Peak memory consumption was 27.7 MB. Max. memory is 7.1 GB. [2019-09-10 03:08:04,896 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.18 ms. Allocated memory is still 132.6 MB. Free memory was 107.2 MB in the beginning and 107.0 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 233.55 ms. Allocated memory is still 132.6 MB. Free memory was 88.3 MB in the beginning and 79.4 MB in the end (delta: 8.9 MB). Peak memory consumption was 8.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 103.35 ms. Allocated memory was 132.6 MB in the beginning and 199.2 MB in the end (delta: 66.6 MB). Free memory was 79.4 MB in the beginning and 176.2 MB in the end (delta: -96.8 MB). Peak memory consumption was 16.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 207.15 ms. Allocated memory is still 199.2 MB. Free memory was 176.2 MB in the beginning and 165.3 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3931.07 ms. Allocated memory was 199.2 MB in the beginning and 262.1 MB in the end (delta: 62.9 MB). Free memory was 164.6 MB in the beginning and 199.9 MB in the end (delta: -35.3 MB). Peak memory consumption was 27.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L10] int input = 5; VAL [input=5] [L11] CALL, EXPR id(input) VAL [\old(x)=5] [L5] COND FALSE !(x==0) VAL [\old(x)=5, x=5] [L6] CALL, EXPR id(x-1) VAL [\old(x)=4] [L5] COND FALSE !(x==0) VAL [\old(x)=4, x=4] [L6] CALL, EXPR id(x-1) VAL [\old(x)=3] [L5] COND FALSE !(x==0) VAL [\old(x)=3, x=3] [L6] CALL, EXPR id(x-1) VAL [\old(x)=2] [L5] COND FALSE !(x==0) VAL [\old(x)=2, x=2] [L6] CALL, EXPR id(x-1) VAL [\old(x)=1] [L5] COND FALSE !(x==0) VAL [\old(x)=1, x=1] [L6] CALL, EXPR id(x-1) VAL [\old(x)=0] [L5] COND TRUE x==0 [L5] return 0; VAL [\old(x)=0, \result=0, x=0] [L6] RET, EXPR id(x-1) VAL [\old(x)=1, id(x-1)=0, x=1] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=2, id(x-1)=1, x=2] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=3, id(x-1)=2, x=3] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=4, id(x-1)=3, x=4] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=5, id(x-1)=4, x=5] [L6] return id(x-1) + 1; [L11] RET, EXPR id(input) VAL [id(input)=5, input=5] [L11] int result = id(input); [L12] COND TRUE result == 5 VAL [input=5, result=5] [L13] __VERIFIER_error() VAL [input=5, result=5] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. UNSAFE Result, 3.8s OverallTime, 6 OverallIterations, 6 TraceHistogramMax, 0.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 69 SDtfs, 58 SDslu, 240 SDs, 0 SdLazy, 145 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 280 GetRequests, 194 SyntacticMatches, 29 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.2s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.5s InterpolantComputationTime, 280 NumberOfCodeBlocks, 276 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 336 ConstructedInterpolants, 0 QuantifiedInterpolants, 23952 SizeOfPredicates, 18 NumberOfNonLiveVariables, 252 ConjunctsInSsa, 36 ConjunctsInUnsatCore, 13 InterpolantComputations, 1 PerfectInterpolantSequences, 120/300 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...