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/loop-lit/afnp2014_true-unreach-call_true-termination.c.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8c3fbe1 [2018-10-22 16:07:53,235 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-22 16:07:53,237 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-22 16:07:53,251 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-22 16:07:53,252 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-22 16:07:53,253 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-22 16:07:53,255 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-22 16:07:53,257 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-22 16:07:53,260 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-22 16:07:53,261 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-22 16:07:53,264 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-22 16:07:53,266 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-22 16:07:53,267 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-22 16:07:53,268 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-22 16:07:53,269 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-22 16:07:53,270 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-22 16:07:53,274 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-22 16:07:53,276 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-22 16:07:53,285 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-22 16:07:53,289 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-22 16:07:53,290 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-22 16:07:53,291 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-22 16:07:53,296 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-22 16:07:53,297 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-22 16:07:53,297 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-22 16:07:53,301 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-22 16:07:53,302 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-22 16:07:53,304 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-22 16:07:53,305 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-22 16:07:53,307 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-22 16:07:53,307 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-22 16:07:53,309 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-10-22 16:07:53,314 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 [2018-10-22 16:07:53,336 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-22 16:07:53,337 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-22 16:07:53,337 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-22 16:07:53,338 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-22 16:07:53,338 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-22 16:07:53,338 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-22 16:07:53,338 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-22 16:07:53,339 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-22 16:07:53,339 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-22 16:07:53,339 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-22 16:07:53,339 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-22 16:07:53,339 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-22 16:07:53,340 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-22 16:07:53,340 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-22 16:07:53,340 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-22 16:07:53,341 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-22 16:07:53,341 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-22 16:07:53,341 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-22 16:07:53,341 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-22 16:07:53,341 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-22 16:07:53,342 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-22 16:07:53,342 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-22 16:07:53,342 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-22 16:07:53,342 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-22 16:07:53,342 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-22 16:07:53,343 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-22 16:07:53,343 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-22 16:07:53,343 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-22 16:07:53,343 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-22 16:07:53,343 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-22 16:07:53,344 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-22 16:07:53,344 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-22 16:07:53,344 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-22 16:07:53,344 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-22 16:07:53,410 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-22 16:07:53,430 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-22 16:07:53,434 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-22 16:07:53,435 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-22 16:07:53,436 INFO L276 PluginConnector]: CDTParser initialized [2018-10-22 16:07:53,437 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loop-lit/afnp2014_true-unreach-call_true-termination.c.i [2018-10-22 16:07:53,501 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/2134d70a8/5b4f49b62c0d42398babd426ddb05059/FLAGd0283d2fd [2018-10-22 16:07:53,892 INFO L298 CDTParser]: Found 1 translation units. [2018-10-22 16:07:53,893 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/afnp2014_true-unreach-call_true-termination.c.i [2018-10-22 16:07:53,898 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/2134d70a8/5b4f49b62c0d42398babd426ddb05059/FLAGd0283d2fd [2018-10-22 16:07:53,911 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/2134d70a8/5b4f49b62c0d42398babd426ddb05059 [2018-10-22 16:07:53,924 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-22 16:07:53,926 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-22 16:07:53,926 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-22 16:07:53,927 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-22 16:07:53,930 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-22 16:07:53,931 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 04:07:53" (1/1) ... [2018-10-22 16:07:53,934 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c7917ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 04:07:53, skipping insertion in model container [2018-10-22 16:07:53,934 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 04:07:53" (1/1) ... [2018-10-22 16:07:53,945 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-22 16:07:53,972 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-22 16:07:54,183 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 16:07:54,188 INFO L189 MainTranslator]: Completed pre-run [2018-10-22 16:07:54,205 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 16:07:54,222 INFO L193 MainTranslator]: Completed translation [2018-10-22 16:07:54,223 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 04:07:54 WrapperNode [2018-10-22 16:07:54,223 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-22 16:07:54,224 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-22 16:07:54,224 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-22 16:07:54,224 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-22 16:07:54,233 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 04:07:54" (1/1) ... [2018-10-22 16:07:54,239 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 04:07:54" (1/1) ... [2018-10-22 16:07:54,245 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-22 16:07:54,246 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-22 16:07:54,246 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-22 16:07:54,246 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-22 16:07:54,254 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 04:07:54" (1/1) ... [2018-10-22 16:07:54,254 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 04:07:54" (1/1) ... [2018-10-22 16:07:54,255 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 04:07:54" (1/1) ... [2018-10-22 16:07:54,255 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 04:07:54" (1/1) ... [2018-10-22 16:07:54,258 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 04:07:54" (1/1) ... [2018-10-22 16:07:54,263 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 04:07:54" (1/1) ... [2018-10-22 16:07:54,264 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 04:07:54" (1/1) ... [2018-10-22 16:07:54,265 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-22 16:07:54,266 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-22 16:07:54,266 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-22 16:07:54,266 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-22 16:07:54,267 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 04:07:54" (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 [2018-10-22 16:07:54,381 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-22 16:07:54,381 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-22 16:07:54,381 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-22 16:07:54,381 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-22 16:07:54,381 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-22 16:07:54,382 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-22 16:07:54,383 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-10-22 16:07:54,383 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-10-22 16:07:54,621 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-22 16:07:54,622 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 04:07:54 BoogieIcfgContainer [2018-10-22 16:07:54,622 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-22 16:07:54,623 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-22 16:07:54,623 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-22 16:07:54,629 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-22 16:07:54,629 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 04:07:53" (1/3) ... [2018-10-22 16:07:54,631 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1de56818 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 04:07:54, skipping insertion in model container [2018-10-22 16:07:54,631 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 04:07:54" (2/3) ... [2018-10-22 16:07:54,632 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1de56818 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 04:07:54, skipping insertion in model container [2018-10-22 16:07:54,632 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 04:07:54" (3/3) ... [2018-10-22 16:07:54,635 INFO L112 eAbstractionObserver]: Analyzing ICFG afnp2014_true-unreach-call_true-termination.c.i [2018-10-22 16:07:54,656 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-22 16:07:54,667 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-22 16:07:54,711 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-22 16:07:54,760 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-22 16:07:54,761 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-22 16:07:54,761 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-22 16:07:54,761 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-22 16:07:54,761 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-22 16:07:54,762 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-22 16:07:54,762 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-22 16:07:54,762 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-22 16:07:54,762 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-22 16:07:54,790 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2018-10-22 16:07:54,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-22 16:07:54,796 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 16:07:54,797 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 16:07:54,799 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 16:07:54,805 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 16:07:54,805 INFO L82 PathProgramCache]: Analyzing trace with hash -2008095039, now seen corresponding path program 1 times [2018-10-22 16:07:54,808 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 16:07:54,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:07:54,860 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 16:07:54,860 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:07:54,860 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 16:07:54,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:07:54,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 16:07:54,914 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 16:07:54,914 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-22 16:07:54,914 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 16:07:54,918 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-22 16:07:54,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-22 16:07:54,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-22 16:07:54,938 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2018-10-22 16:07:54,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 16:07:54,962 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2018-10-22 16:07:54,962 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-22 16:07:54,964 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2018-10-22 16:07:54,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 16:07:54,974 INFO L225 Difference]: With dead ends: 33 [2018-10-22 16:07:54,974 INFO L226 Difference]: Without dead ends: 14 [2018-10-22 16:07:54,978 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 [2018-10-22 16:07:54,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-22 16:07:55,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-10-22 16:07:55,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-22 16:07:55,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2018-10-22 16:07:55,017 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2018-10-22 16:07:55,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 16:07:55,018 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2018-10-22 16:07:55,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-22 16:07:55,018 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2018-10-22 16:07:55,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-22 16:07:55,019 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 16:07:55,019 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 16:07:55,019 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 16:07:55,020 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 16:07:55,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1404763780, now seen corresponding path program 1 times [2018-10-22 16:07:55,020 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 16:07:55,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:07:55,022 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 16:07:55,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:07:55,022 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 16:07:55,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:07:55,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 16:07:55,326 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 16:07:55,326 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-22 16:07:55,326 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 16:07:55,330 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-22 16:07:55,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-22 16:07:55,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-22 16:07:55,334 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 5 states. [2018-10-22 16:07:55,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 16:07:55,477 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2018-10-22 16:07:55,477 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-22 16:07:55,478 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-10-22 16:07:55,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 16:07:55,479 INFO L225 Difference]: With dead ends: 23 [2018-10-22 16:07:55,479 INFO L226 Difference]: Without dead ends: 18 [2018-10-22 16:07:55,480 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-10-22 16:07:55,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-22 16:07:55,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-10-22 16:07:55,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-22 16:07:55,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2018-10-22 16:07:55,489 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 13 [2018-10-22 16:07:55,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 16:07:55,490 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2018-10-22 16:07:55,490 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-22 16:07:55,490 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2018-10-22 16:07:55,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-22 16:07:55,491 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 16:07:55,491 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 16:07:55,492 INFO L424 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 16:07:55,492 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 16:07:55,492 INFO L82 PathProgramCache]: Analyzing trace with hash 108470830, now seen corresponding path program 1 times [2018-10-22 16:07:55,493 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 16:07:55,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:07:55,497 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 16:07:55,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:07:55,497 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 16:07:55,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:07:55,669 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 16:07:55,669 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:07:55,670 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 16:07:55,671 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 18 with the following transitions: [2018-10-22 16:07:55,673 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [10], [13], [19], [21], [28], [31], [33], [39], [40], [41], [43] [2018-10-22 16:07:55,724 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-22 16:07:55,725 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-22 16:07:56,289 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-22 16:07:56,291 INFO L272 AbstractInterpreter]: Visited 14 different actions 110 times. Merged at 5 different actions 55 times. Widened at 1 different actions 7 times. Found 1 fixpoints after 1 different actions. Largest state had 4 variables. [2018-10-22 16:07:56,310 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 16:07:56,312 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-22 16:07:56,312 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:07:56,312 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-22 16:07:56,323 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 16:07:56,324 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 16:07:56,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:07:56,352 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 16:07:56,426 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 16:07:56,426 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 16:07:56,665 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 16:07:56,696 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:07:56,697 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 3 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 16:07:56,724 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 16:07:56,724 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 16:07:56,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:07:56,747 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 16:07:56,834 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 16:07:56,835 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 16:07:56,859 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 16:07:56,862 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 16:07:56,863 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6] total 8 [2018-10-22 16:07:56,863 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 16:07:56,863 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-22 16:07:56,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-22 16:07:56,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2018-10-22 16:07:56,864 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 6 states. [2018-10-22 16:07:56,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 16:07:56,976 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2018-10-22 16:07:56,977 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-22 16:07:56,977 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2018-10-22 16:07:56,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 16:07:56,978 INFO L225 Difference]: With dead ends: 27 [2018-10-22 16:07:56,978 INFO L226 Difference]: Without dead ends: 22 [2018-10-22 16:07:56,979 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 62 SyntacticMatches, 4 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-10-22 16:07:56,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-10-22 16:07:56,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-10-22 16:07:56,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-22 16:07:56,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2018-10-22 16:07:56,984 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 17 [2018-10-22 16:07:56,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 16:07:56,984 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2018-10-22 16:07:56,984 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-22 16:07:56,984 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2018-10-22 16:07:56,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-22 16:07:56,985 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 16:07:56,985 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 16:07:56,986 INFO L424 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 16:07:56,986 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 16:07:56,986 INFO L82 PathProgramCache]: Analyzing trace with hash -238722856, now seen corresponding path program 2 times [2018-10-22 16:07:56,986 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 16:07:56,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:07:56,987 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 16:07:56,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:07:56,987 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 16:07:57,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:07:57,114 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 16:07:57,115 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:07:57,115 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 16:07:57,115 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 16:07:57,115 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 16:07:57,115 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:07:57,116 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 16:07:57,124 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 16:07:57,125 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 16:07:57,156 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 16:07:57,156 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 16:07:57,159 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 16:07:57,291 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 16:07:57,292 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 16:07:57,487 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 16:07:57,510 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:07:57,511 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 16:07:57,525 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 16:07:57,526 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 16:07:57,550 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 16:07:57,550 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 16:07:57,554 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 16:07:57,582 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 16:07:57,582 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 16:07:57,613 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 16:07:57,614 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 16:07:57,614 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7] total 10 [2018-10-22 16:07:57,615 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 16:07:57,615 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-22 16:07:57,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-22 16:07:57,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-10-22 16:07:57,616 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 8 states. [2018-10-22 16:07:57,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 16:07:57,672 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2018-10-22 16:07:57,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-22 16:07:57,673 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2018-10-22 16:07:57,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 16:07:57,674 INFO L225 Difference]: With dead ends: 22 [2018-10-22 16:07:57,674 INFO L226 Difference]: Without dead ends: 0 [2018-10-22 16:07:57,675 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 75 SyntacticMatches, 6 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2018-10-22 16:07:57,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-10-22 16:07:57,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-10-22 16:07:57,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-10-22 16:07:57,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-10-22 16:07:57,676 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2018-10-22 16:07:57,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 16:07:57,676 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-22 16:07:57,676 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-22 16:07:57,676 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-10-22 16:07:57,676 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-10-22 16:07:57,680 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-10-22 16:07:57,832 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-10-22 16:07:57,833 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-10-22 16:07:57,833 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-10-22 16:07:57,833 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-10-22 16:07:57,833 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-10-22 16:07:57,833 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-10-22 16:07:57,834 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 10 19) the Hoare annotation is: true [2018-10-22 16:07:57,834 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 10 19) no Hoare annotation was computed. [2018-10-22 16:07:57,834 INFO L425 ceAbstractionStarter]: For program point L17(line 17) no Hoare annotation was computed. [2018-10-22 16:07:57,834 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 10 19) no Hoare annotation was computed. [2018-10-22 16:07:57,834 INFO L425 ceAbstractionStarter]: For program point L13-1(lines 13 16) no Hoare annotation was computed. [2018-10-22 16:07:57,834 INFO L425 ceAbstractionStarter]: For program point L13-2(line 13) no Hoare annotation was computed. [2018-10-22 16:07:57,835 INFO L425 ceAbstractionStarter]: For program point L13-4(lines 13 16) no Hoare annotation was computed. [2018-10-22 16:07:57,835 INFO L421 ceAbstractionStarter]: At program point L13-6(lines 13 16) the Hoare annotation is: (and (<= main_~y~0 main_~x~0) (<= 0 main_~y~0) (<= 1 main_~x~0)) [2018-10-22 16:07:57,835 INFO L421 ceAbstractionStarter]: At program point L13-7(lines 13 16) the Hoare annotation is: (<= main_~y~0 main_~x~0) [2018-10-22 16:07:57,835 INFO L428 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2018-10-22 16:07:57,835 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2018-10-22 16:07:57,835 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2018-10-22 16:07:57,836 INFO L425 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-10-22 16:07:57,836 INFO L425 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2018-10-22 16:07:57,836 INFO L425 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2018-10-22 16:07:57,852 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 04:07:57 BoogieIcfgContainer [2018-10-22 16:07:57,852 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-22 16:07:57,853 INFO L168 Benchmark]: Toolchain (without parser) took 3928.91 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 747.6 MB). Free memory was 1.4 GB in the beginning and 2.0 GB in the end (delta: -607.8 MB). Peak memory consumption was 139.9 MB. Max. memory is 7.1 GB. [2018-10-22 16:07:57,856 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. [2018-10-22 16:07:57,857 INFO L168 Benchmark]: CACSL2BoogieTranslator took 296.76 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. [2018-10-22 16:07:57,858 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.14 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. [2018-10-22 16:07:57,859 INFO L168 Benchmark]: Boogie Preprocessor took 19.43 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. [2018-10-22 16:07:57,859 INFO L168 Benchmark]: RCFGBuilder took 356.67 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 747.6 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -797.5 MB). Peak memory consumption was 26.4 MB. Max. memory is 7.1 GB. [2018-10-22 16:07:57,861 INFO L168 Benchmark]: TraceAbstraction took 3229.40 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 179.2 MB). Peak memory consumption was 179.2 MB. Max. memory is 7.1 GB. [2018-10-22 16:07:57,868 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 296.76 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 22.14 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 19.43 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 356.67 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 747.6 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -797.5 MB). Peak memory consumption was 26.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3229.40 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 179.2 MB). Peak memory consumption was 179.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: (y <= x && 0 <= y) && 1 <= x - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 21 locations, 1 error locations. SAFE Result, 3.1s OverallTime, 4 OverallIterations, 3 TraceHistogramMax, 0.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.1s HoareAnnotationTime, HoareTripleCheckerStatistics: 56 SDtfs, 14 SDslu, 111 SDs, 0 SdLazy, 41 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 173 GetRequests, 141 SyntacticMatches, 10 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.6s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 10 PreInvPairs, 14 NumberOfFragments, 18 HoareAnnotationTreeSize, 10 FomulaSimplifications, 26 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 6 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 137 NumberOfCodeBlocks, 137 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 201 ConstructedInterpolants, 0 QuantifiedInterpolants, 9817 SizeOfPredicates, 12 NumberOfNonLiveVariables, 186 ConjunctsInSsa, 40 ConjunctsInUnsatCore, 12 InterpolantComputations, 2 PerfectInterpolantSequences, 0/80 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...