java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default.epf -i ../../../trunk/examples/svcomp/loops/for_bounded_loop1_false-unreach-call_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-24 12:04:51,525 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-24 12:04:51,528 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-24 12:04:51,546 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-24 12:04:51,546 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-24 12:04:51,548 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-24 12:04:51,550 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-24 12:04:51,553 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-24 12:04:51,563 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-24 12:04:51,564 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-24 12:04:51,565 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-24 12:04:51,565 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-24 12:04:51,570 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-24 12:04:51,574 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-24 12:04:51,575 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-24 12:04:51,577 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-24 12:04:51,577 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-24 12:04:51,581 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-24 12:04:51,584 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-24 12:04:51,586 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-24 12:04:51,588 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-24 12:04:51,589 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-24 12:04:51,591 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-24 12:04:51,599 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default.epf [2018-10-24 12:04:51,618 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-24 12:04:51,619 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-24 12:04:51,623 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-24 12:04:51,623 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-24 12:04:51,623 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-24 12:04:51,623 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-24 12:04:51,625 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-24 12:04:51,625 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-24 12:04:51,625 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-24 12:04:51,625 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-24 12:04:51,625 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-24 12:04:51,626 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-24 12:04:51,626 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-24 12:04:51,627 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-24 12:04:51,627 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-24 12:04:51,627 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-24 12:04:51,627 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-24 12:04:51,627 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-24 12:04:51,628 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-24 12:04:51,629 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-24 12:04:51,629 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-24 12:04:51,630 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-24 12:04:51,630 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-24 12:04:51,630 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-24 12:04:51,630 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 12:04:51,630 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-24 12:04:51,631 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-24 12:04:51,631 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-24 12:04:51,631 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-24 12:04:51,632 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-24 12:04:51,632 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-24 12:04:51,632 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-24 12:04:51,632 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-24 12:04:51,632 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-24 12:04:51,702 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-24 12:04:51,726 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-24 12:04:51,730 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-24 12:04:51,731 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-24 12:04:51,732 INFO L276 PluginConnector]: CDTParser initialized [2018-10-24 12:04:51,733 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loops/for_bounded_loop1_false-unreach-call_true-termination.i [2018-10-24 12:04:51,786 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/8d0a645d7/50b9439cb93b47e5b9ce95fc79d22a52/FLAG1a9644d08 [2018-10-24 12:04:52,265 INFO L298 CDTParser]: Found 1 translation units. [2018-10-24 12:04:52,266 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/for_bounded_loop1_false-unreach-call_true-termination.i [2018-10-24 12:04:52,274 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/8d0a645d7/50b9439cb93b47e5b9ce95fc79d22a52/FLAG1a9644d08 [2018-10-24 12:04:52,291 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/8d0a645d7/50b9439cb93b47e5b9ce95fc79d22a52 [2018-10-24 12:04:52,303 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-24 12:04:52,305 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-24 12:04:52,306 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-24 12:04:52,306 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-24 12:04:52,310 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-24 12:04:52,311 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 12:04:52" (1/1) ... [2018-10-24 12:04:52,315 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@180ddc52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:04:52, skipping insertion in model container [2018-10-24 12:04:52,315 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 12:04:52" (1/1) ... [2018-10-24 12:04:52,326 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-24 12:04:52,350 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-24 12:04:52,528 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 12:04:52,532 INFO L189 MainTranslator]: Completed pre-run [2018-10-24 12:04:52,549 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 12:04:52,565 INFO L193 MainTranslator]: Completed translation [2018-10-24 12:04:52,566 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:04:52 WrapperNode [2018-10-24 12:04:52,566 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-24 12:04:52,567 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-24 12:04:52,567 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-24 12:04:52,567 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-24 12:04:52,577 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:04:52" (1/1) ... [2018-10-24 12:04:52,583 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:04:52" (1/1) ... [2018-10-24 12:04:52,589 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-24 12:04:52,589 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-24 12:04:52,589 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-24 12:04:52,590 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-24 12:04:52,597 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:04:52" (1/1) ... [2018-10-24 12:04:52,598 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:04:52" (1/1) ... [2018-10-24 12:04:52,598 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:04:52" (1/1) ... [2018-10-24 12:04:52,599 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:04:52" (1/1) ... [2018-10-24 12:04:52,601 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:04:52" (1/1) ... [2018-10-24 12:04:52,606 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:04:52" (1/1) ... [2018-10-24 12:04:52,607 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:04:52" (1/1) ... [2018-10-24 12:04:52,609 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-24 12:04:52,609 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-24 12:04:52,609 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-24 12:04:52,610 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-24 12:04:52,610 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:04:52" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-24 12:04:52,736 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-24 12:04:52,736 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-24 12:04:52,736 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-24 12:04:52,736 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-24 12:04:52,736 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-24 12:04:52,737 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-24 12:04:52,737 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-10-24 12:04:52,737 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-10-24 12:04:53,136 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-24 12:04:53,136 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:04:53 BoogieIcfgContainer [2018-10-24 12:04:53,137 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-24 12:04:53,138 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-24 12:04:53,138 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-24 12:04:53,147 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-24 12:04:53,148 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 12:04:52" (1/3) ... [2018-10-24 12:04:53,148 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@765f8122 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 12:04:53, skipping insertion in model container [2018-10-24 12:04:53,149 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:04:52" (2/3) ... [2018-10-24 12:04:53,149 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@765f8122 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 12:04:53, skipping insertion in model container [2018-10-24 12:04:53,149 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:04:53" (3/3) ... [2018-10-24 12:04:53,156 INFO L112 eAbstractionObserver]: Analyzing ICFG for_bounded_loop1_false-unreach-call_true-termination.i [2018-10-24 12:04:53,166 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-24 12:04:53,175 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-24 12:04:53,188 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-24 12:04:53,223 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-24 12:04:53,224 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-24 12:04:53,224 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-24 12:04:53,224 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-24 12:04:53,224 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-24 12:04:53,224 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-24 12:04:53,225 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-24 12:04:53,225 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-24 12:04:53,244 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2018-10-24 12:04:53,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-24 12:04:53,251 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:04:53,253 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:04:53,255 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:04:53,261 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:04:53,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1420455248, now seen corresponding path program 1 times [2018-10-24 12:04:53,265 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:04:53,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:04:53,320 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:04:53,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:04:53,320 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:04:53,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:04:53,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:04:53,391 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 12:04:53,391 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-24 12:04:53,391 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 12:04:53,395 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-24 12:04:53,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-24 12:04:53,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-24 12:04:53,409 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 2 states. [2018-10-24 12:04:53,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:04:53,436 INFO L93 Difference]: Finished difference Result 42 states and 56 transitions. [2018-10-24 12:04:53,436 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-24 12:04:53,437 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2018-10-24 12:04:53,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:04:53,448 INFO L225 Difference]: With dead ends: 42 [2018-10-24 12:04:53,448 INFO L226 Difference]: Without dead ends: 20 [2018-10-24 12:04:53,452 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-24 12:04:53,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-10-24 12:04:53,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-10-24 12:04:53,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-24 12:04:53,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2018-10-24 12:04:53,497 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 11 [2018-10-24 12:04:53,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:04:53,498 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2018-10-24 12:04:53,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-24 12:04:53,498 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2018-10-24 12:04:53,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-24 12:04:53,499 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:04:53,500 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:04:53,500 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:04:53,500 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:04:53,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1573461901, now seen corresponding path program 1 times [2018-10-24 12:04:53,501 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:04:53,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:04:53,502 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:04:53,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:04:53,503 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:04:53,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:04:53,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:04:53,739 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 12:04:53,739 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-24 12:04:53,739 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 12:04:53,741 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 12:04:53,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 12:04:53,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-10-24 12:04:53,742 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 6 states. [2018-10-24 12:04:54,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:04:54,011 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2018-10-24 12:04:54,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 12:04:54,012 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2018-10-24 12:04:54,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:04:54,014 INFO L225 Difference]: With dead ends: 31 [2018-10-24 12:04:54,014 INFO L226 Difference]: Without dead ends: 28 [2018-10-24 12:04:54,015 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-10-24 12:04:54,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-10-24 12:04:54,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2018-10-24 12:04:54,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-24 12:04:54,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2018-10-24 12:04:54,026 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 12 [2018-10-24 12:04:54,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:04:54,026 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2018-10-24 12:04:54,026 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 12:04:54,026 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2018-10-24 12:04:54,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-24 12:04:54,027 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:04:54,027 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:04:54,028 INFO L424 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:04:54,028 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:04:54,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1075995346, now seen corresponding path program 1 times [2018-10-24 12:04:54,028 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:04:54,030 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:04:54,030 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:04:54,030 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:04:54,030 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:04:54,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:04:54,381 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:04:54,382 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:04:54,382 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 12:04:54,383 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 20 with the following transitions: [2018-10-24 12:04:54,385 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [12], [17], [19], [23], [32], [35], [37], [40], [42], [43], [44], [45], [47], [48], [49] [2018-10-24 12:04:54,438 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-24 12:04:54,439 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 12:04:54,670 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-24 12:04:54,674 INFO L272 AbstractInterpreter]: Visited 17 different actions 21 times. Never merged. Never widened. Never found a fixpoint. Largest state had 6 variables. [2018-10-24 12:04:54,715 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:04:54,715 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-24 12:04:54,863 INFO L232 lantSequenceWeakener]: Weakened 9 states. On average, predicates are now at 66.67% of their original sizes. [2018-10-24 12:04:54,863 INFO L411 sIntCurrentIteration]: Unifying AI predicates [2018-10-24 12:04:55,285 INFO L413 sIntCurrentIteration]: We have 18 unified AI predicates [2018-10-24 12:04:55,285 INFO L422 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-24 12:04:55,286 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 12:04:55,286 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 15 [2018-10-24 12:04:55,287 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 12:04:55,287 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-24 12:04:55,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-24 12:04:55,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2018-10-24 12:04:55,288 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 9 states. [2018-10-24 12:04:55,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:04:55,764 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2018-10-24 12:04:55,764 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-24 12:04:55,765 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2018-10-24 12:04:55,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:04:55,766 INFO L225 Difference]: With dead ends: 44 [2018-10-24 12:04:55,766 INFO L226 Difference]: Without dead ends: 42 [2018-10-24 12:04:55,767 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-10-24 12:04:55,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-10-24 12:04:55,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 38. [2018-10-24 12:04:55,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-24 12:04:55,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2018-10-24 12:04:55,778 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 19 [2018-10-24 12:04:55,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:04:55,779 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2018-10-24 12:04:55,779 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-24 12:04:55,779 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2018-10-24 12:04:55,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-10-24 12:04:55,780 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:04:55,780 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:04:55,781 INFO L424 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:04:55,781 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:04:55,781 INFO L82 PathProgramCache]: Analyzing trace with hash 977980684, now seen corresponding path program 1 times [2018-10-24 12:04:55,781 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:04:55,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:04:55,783 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:04:55,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:04:55,783 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:04:55,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-24 12:04:55,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-24 12:04:55,827 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-10-24 12:04:55,856 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 12:04:55 BoogieIcfgContainer [2018-10-24 12:04:55,857 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-24 12:04:55,858 INFO L168 Benchmark]: Toolchain (without parser) took 3554.27 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 741.9 MB). Free memory was 1.4 GB in the beginning and 2.1 GB in the end (delta: -673.8 MB). Peak memory consumption was 68.1 MB. Max. memory is 7.1 GB. [2018-10-24 12:04:55,860 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-24 12:04:55,861 INFO L168 Benchmark]: CACSL2BoogieTranslator took 260.86 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-10-24 12:04:55,862 INFO L168 Benchmark]: Boogie Procedure Inliner took 21.97 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-24 12:04:55,863 INFO L168 Benchmark]: Boogie Preprocessor took 19.66 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-24 12:04:55,864 INFO L168 Benchmark]: RCFGBuilder took 527.58 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 741.9 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -794.8 MB). Peak memory consumption was 26.4 MB. Max. memory is 7.1 GB. [2018-10-24 12:04:55,865 INFO L168 Benchmark]: TraceAbstraction took 2719.18 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 110.5 MB). Peak memory consumption was 110.5 MB. Max. memory is 7.1 GB. [2018-10-24 12:04:55,873 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 260.86 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 21.97 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 19.66 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 527.58 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 741.9 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -794.8 MB). Peak memory consumption was 26.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2719.18 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 110.5 MB). Peak memory consumption was 110.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 6]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L14] int i=0, x=0, y=0; [L15] int n=__VERIFIER_nondet_int(); [L16] COND FALSE !(!(n>0)) [L17] i=0 VAL [i=0, n=1, x=0, y=0] [L17] COND TRUE i