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-EXP.epf -i ../../../trunk/examples/svcomp/loop-acceleration/array_true-unreach-call1_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-24 12:29:15,277 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-24 12:29:15,279 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-24 12:29:15,291 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-24 12:29:15,291 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-24 12:29:15,292 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-24 12:29:15,294 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-24 12:29:15,295 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-24 12:29:15,297 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-24 12:29:15,298 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-24 12:29:15,299 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-24 12:29:15,299 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-24 12:29:15,300 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-24 12:29:15,301 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-24 12:29:15,302 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-24 12:29:15,303 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-24 12:29:15,304 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-24 12:29:15,305 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-24 12:29:15,309 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-24 12:29:15,311 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-24 12:29:15,312 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-24 12:29:15,315 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-24 12:29:15,317 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-24 12:29:15,318 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-24 12:29:15,318 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-24 12:29:15,322 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-24 12:29:15,324 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-24 12:29:15,324 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-24 12:29:15,327 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-24 12:29:15,330 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-24 12:29:15,330 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-24 12:29:15,331 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-10-24 12:29:15,334 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-EXP.epf [2018-10-24 12:29:15,362 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-24 12:29:15,362 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-24 12:29:15,364 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-24 12:29:15,364 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-24 12:29:15,364 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-24 12:29:15,364 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-24 12:29:15,364 INFO L133 SettingsManager]: * Explicit value domain=true [2018-10-24 12:29:15,365 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-24 12:29:15,365 INFO L133 SettingsManager]: * Octagon Domain=false [2018-10-24 12:29:15,365 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-24 12:29:15,365 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-24 12:29:15,365 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-24 12:29:15,366 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-24 12:29:15,366 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-24 12:29:15,367 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-24 12:29:15,367 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-24 12:29:15,367 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-24 12:29:15,367 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-24 12:29:15,368 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-24 12:29:15,369 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-24 12:29:15,369 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-24 12:29:15,370 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-24 12:29:15,370 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-24 12:29:15,370 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-24 12:29:15,370 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-24 12:29:15,370 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-24 12:29:15,371 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 12:29:15,371 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-24 12:29:15,371 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-24 12:29:15,371 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-24 12:29:15,371 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-24 12:29:15,372 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-24 12:29:15,372 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-24 12:29:15,372 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-24 12:29:15,372 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-24 12:29:15,372 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-24 12:29:15,416 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-24 12:29:15,428 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-24 12:29:15,432 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-24 12:29:15,433 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-24 12:29:15,434 INFO L276 PluginConnector]: CDTParser initialized [2018-10-24 12:29:15,434 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loop-acceleration/array_true-unreach-call1_true-termination.i [2018-10-24 12:29:15,492 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/3948de227/0053f5dbc82a4e5ba6802af8c79f851f/FLAG297cbbed9 [2018-10-24 12:29:15,943 INFO L298 CDTParser]: Found 1 translation units. [2018-10-24 12:29:15,947 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_true-unreach-call1_true-termination.i [2018-10-24 12:29:15,955 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/3948de227/0053f5dbc82a4e5ba6802af8c79f851f/FLAG297cbbed9 [2018-10-24 12:29:15,972 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/3948de227/0053f5dbc82a4e5ba6802af8c79f851f [2018-10-24 12:29:15,983 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-24 12:29:15,984 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-24 12:29:15,986 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-24 12:29:15,986 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-24 12:29:15,992 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-24 12:29:15,993 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 12:29:15" (1/1) ... [2018-10-24 12:29:15,996 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36832d81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:29:15, skipping insertion in model container [2018-10-24 12:29:15,996 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 12:29:15" (1/1) ... [2018-10-24 12:29:16,007 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-24 12:29:16,028 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-24 12:29:16,236 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 12:29:16,240 INFO L189 MainTranslator]: Completed pre-run [2018-10-24 12:29:16,260 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 12:29:16,281 INFO L193 MainTranslator]: Completed translation [2018-10-24 12:29:16,282 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:29:16 WrapperNode [2018-10-24 12:29:16,282 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-24 12:29:16,283 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-24 12:29:16,283 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-24 12:29:16,283 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-24 12:29:16,293 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:29:16" (1/1) ... [2018-10-24 12:29:16,304 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:29:16" (1/1) ... [2018-10-24 12:29:16,329 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-24 12:29:16,330 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-24 12:29:16,330 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-24 12:29:16,330 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-24 12:29:16,345 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:29:16" (1/1) ... [2018-10-24 12:29:16,345 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:29:16" (1/1) ... [2018-10-24 12:29:16,347 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:29:16" (1/1) ... [2018-10-24 12:29:16,348 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:29:16" (1/1) ... [2018-10-24 12:29:16,355 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:29:16" (1/1) ... [2018-10-24 12:29:16,361 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:29:16" (1/1) ... [2018-10-24 12:29:16,363 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:29:16" (1/1) ... [2018-10-24 12:29:16,365 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-24 12:29:16,372 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-24 12:29:16,372 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-24 12:29:16,372 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-24 12:29:16,373 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:29:16" (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 12:29:16,502 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-24 12:29:16,503 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-24 12:29:16,503 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-24 12:29:16,503 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-24 12:29:16,503 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-24 12:29:16,503 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-24 12:29:16,504 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-10-24 12:29:16,504 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-10-24 12:29:16,859 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-24 12:29:16,859 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:29:16 BoogieIcfgContainer [2018-10-24 12:29:16,860 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-24 12:29:16,861 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-24 12:29:16,861 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-24 12:29:16,864 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-24 12:29:16,864 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 12:29:15" (1/3) ... [2018-10-24 12:29:16,865 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72117b2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 12:29:16, skipping insertion in model container [2018-10-24 12:29:16,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:29:16" (2/3) ... [2018-10-24 12:29:16,866 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72117b2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 12:29:16, skipping insertion in model container [2018-10-24 12:29:16,866 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:29:16" (3/3) ... [2018-10-24 12:29:16,867 INFO L112 eAbstractionObserver]: Analyzing ICFG array_true-unreach-call1_true-termination.i [2018-10-24 12:29:16,877 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-24 12:29:16,884 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-24 12:29:16,901 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-24 12:29:16,934 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-24 12:29:16,934 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-24 12:29:16,935 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-24 12:29:16,935 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-24 12:29:16,935 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-24 12:29:16,935 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-24 12:29:16,935 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-24 12:29:16,936 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-24 12:29:16,954 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2018-10-24 12:29:16,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-24 12:29:16,960 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:29:16,961 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:29:16,963 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:29:16,969 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:29:16,969 INFO L82 PathProgramCache]: Analyzing trace with hash -173834890, now seen corresponding path program 1 times [2018-10-24 12:29:16,972 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:29:17,026 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:29:17,026 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:29:17,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:29:17,027 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:29:17,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:29:17,104 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 12:29:17,106 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 12:29:17,106 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-24 12:29:17,107 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 12:29:17,112 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-24 12:29:17,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-24 12:29:17,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-24 12:29:17,130 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states. [2018-10-24 12:29:17,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:29:17,153 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2018-10-24 12:29:17,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-24 12:29:17,154 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2018-10-24 12:29:17,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:29:17,163 INFO L225 Difference]: With dead ends: 35 [2018-10-24 12:29:17,163 INFO L226 Difference]: Without dead ends: 15 [2018-10-24 12:29:17,167 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 12:29:17,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-24 12:29:17,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-10-24 12:29:17,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-24 12:29:17,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-10-24 12:29:17,200 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2018-10-24 12:29:17,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:29:17,201 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-10-24 12:29:17,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-24 12:29:17,201 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-10-24 12:29:17,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-24 12:29:17,202 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:29:17,202 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:29:17,203 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:29:17,203 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:29:17,203 INFO L82 PathProgramCache]: Analyzing trace with hash -737648989, now seen corresponding path program 1 times [2018-10-24 12:29:17,203 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:29:17,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:29:17,205 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:29:17,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:29:17,205 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:29:17,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:29:17,309 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 12:29:17,309 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 12:29:17,309 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 12:29:17,309 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 12:29:17,311 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 12:29:17,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 12:29:17,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 12:29:17,312 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 3 states. [2018-10-24 12:29:17,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:29:17,359 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-10-24 12:29:17,359 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 12:29:17,359 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2018-10-24 12:29:17,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:29:17,360 INFO L225 Difference]: With dead ends: 24 [2018-10-24 12:29:17,361 INFO L226 Difference]: Without dead ends: 18 [2018-10-24 12:29:17,362 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 12:29:17,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-24 12:29:17,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2018-10-24 12:29:17,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-24 12:29:17,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-10-24 12:29:17,366 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 13 [2018-10-24 12:29:17,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:29:17,367 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-10-24 12:29:17,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 12:29:17,367 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-10-24 12:29:17,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-24 12:29:17,369 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:29:17,369 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:29:17,369 INFO L424 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:29:17,370 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:29:17,370 INFO L82 PathProgramCache]: Analyzing trace with hash -1154592614, now seen corresponding path program 1 times [2018-10-24 12:29:17,370 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:29:17,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:29:17,371 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:29:17,373 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:29:17,373 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:29:17,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:29:17,478 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:29:17,479 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:29:17,479 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 12:29:17,483 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 17 with the following transitions: [2018-10-24 12:29:17,486 INFO L202 CegarAbsIntRunner]: [0], [1], [5], [9], [12], [14], [16], [20], [24], [27], [29], [35], [36], [37], [39] [2018-10-24 12:29:17,524 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-24 12:29:17,524 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 12:29:17,789 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-24 12:29:17,791 INFO L272 AbstractInterpreter]: Visited 15 different actions 31 times. Merged at 5 different actions 10 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 29 variables. [2018-10-24 12:29:17,802 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:29:17,803 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-24 12:29:17,804 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:29:17,804 INFO L194 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 [2018-10-24 12:29:17,819 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:29:17,819 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-24 12:29:17,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:29:17,878 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:29:17,932 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:29:17,933 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-24 12:29:18,024 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:29:18,045 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-24 12:29:18,045 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2018-10-24 12:29:18,045 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-24 12:29:18,046 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 12:29:18,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 12:29:18,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-24 12:29:18,047 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 5 states. [2018-10-24 12:29:18,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:29:18,139 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-10-24 12:29:18,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 12:29:18,140 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2018-10-24 12:29:18,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:29:18,141 INFO L225 Difference]: With dead ends: 27 [2018-10-24 12:29:18,141 INFO L226 Difference]: Without dead ends: 21 [2018-10-24 12:29:18,142 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-24 12:29:18,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-24 12:29:18,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2018-10-24 12:29:18,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-24 12:29:18,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-10-24 12:29:18,147 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 16 [2018-10-24 12:29:18,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:29:18,147 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-10-24 12:29:18,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 12:29:18,147 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-10-24 12:29:18,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-24 12:29:18,148 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:29:18,148 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:29:18,149 INFO L424 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:29:18,149 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:29:18,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1276704957, now seen corresponding path program 2 times [2018-10-24 12:29:18,149 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:29:18,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:29:18,151 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:29:18,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:29:18,151 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:29:18,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:29:18,280 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:29:18,280 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:29:18,281 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 12:29:18,281 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-24 12:29:18,281 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-24 12:29:18,281 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:29:18,281 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:29:18,297 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 12:29:18,297 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-24 12:29:18,353 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-10-24 12:29:18,354 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:29:18,358 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:29:18,396 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 12 [2018-10-24 12:29:18,410 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2018-10-24 12:29:18,410 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-24 12:29:18,435 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:29:18,485 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:29:18,485 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2018-10-24 12:29:18,730 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2018-10-24 12:29:18,743 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:29:18,744 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2018-10-24 12:29:18,745 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-24 12:29:18,751 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:29:18,764 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:29:18,765 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:30, output treesize:7 [2018-10-24 12:29:18,927 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-24 12:29:18,927 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-24 12:29:19,244 WARN L307 Elim1Store]: Array PQE input equivalent to true [2018-10-24 12:29:19,245 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-10-24 12:29:19,264 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:29:19,264 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:49, output treesize:1 [2018-10-24 12:29:19,272 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-24 12:29:19,298 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-10-24 12:29:19,298 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5] total 16 [2018-10-24 12:29:19,298 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 12:29:19,299 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-24 12:29:19,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-24 12:29:19,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2018-10-24 12:29:19,300 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 8 states. [2018-10-24 12:29:19,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:29:19,950 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-10-24 12:29:19,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-24 12:29:19,951 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2018-10-24 12:29:19,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:29:19,952 INFO L225 Difference]: With dead ends: 20 [2018-10-24 12:29:19,952 INFO L226 Difference]: Without dead ends: 0 [2018-10-24 12:29:19,953 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2018-10-24 12:29:19,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-10-24 12:29:19,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-10-24 12:29:19,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-10-24 12:29:19,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-10-24 12:29:19,954 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2018-10-24 12:29:19,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:29:19,954 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-24 12:29:19,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-24 12:29:19,955 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-10-24 12:29:19,955 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-10-24 12:29:19,959 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-10-24 12:29:20,025 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2018-10-24 12:29:20,025 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2018-10-24 12:29:20,025 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-10-24 12:29:20,025 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-10-24 12:29:20,025 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-10-24 12:29:20,025 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-10-24 12:29:20,026 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-10-24 12:29:20,026 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 8 15) the Hoare annotation is: true [2018-10-24 12:29:20,026 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 8 15) no Hoare annotation was computed. [2018-10-24 12:29:20,026 INFO L421 ceAbstractionStarter]: At program point L14(line 14) the Hoare annotation is: (and (< main_~i~0 1025) (<= 1023 |main_#t~mem1|) (exists ((main_~i~0 Int)) (and (< main_~i~0 1025) (= (+ (select (select |#memory_int| |main_~#A~0.base|) (+ (* 4 main_~i~0) |main_~#A~0.offset| (- 4))) 1) main_~i~0) (<= 1024 main_~i~0))) (< |main_#t~mem1| 1024) (= (+ (select (select |#memory_int| |main_~#A~0.base|) (+ (* 4 main_~i~0) |main_~#A~0.offset| (- 4))) 1) main_~i~0)) [2018-10-24 12:29:20,026 INFO L425 ceAbstractionStarter]: For program point L14-1(line 14) no Hoare annotation was computed. [2018-10-24 12:29:20,027 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 8 15) no Hoare annotation was computed. [2018-10-24 12:29:20,027 INFO L425 ceAbstractionStarter]: For program point L11-1(lines 11 13) no Hoare annotation was computed. [2018-10-24 12:29:20,027 INFO L425 ceAbstractionStarter]: For program point L11-3(lines 11 13) no Hoare annotation was computed. [2018-10-24 12:29:20,027 INFO L421 ceAbstractionStarter]: At program point L11-4(lines 11 13) the Hoare annotation is: (or (and (< main_~i~0 1025) (= (+ (select (select |#memory_int| |main_~#A~0.base|) (+ (* 4 main_~i~0) |main_~#A~0.offset| (- 4))) 1) main_~i~0)) (= main_~i~0 0)) [2018-10-24 12:29:20,027 INFO L425 ceAbstractionStarter]: For program point L11-5(lines 11 13) no Hoare annotation was computed. [2018-10-24 12:29:20,027 INFO L425 ceAbstractionStarter]: For program point L3-2(lines 2 7) no Hoare annotation was computed. [2018-10-24 12:29:20,027 INFO L428 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 2 7) the Hoare annotation is: true [2018-10-24 12:29:20,028 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 2 7) no Hoare annotation was computed. [2018-10-24 12:29:20,028 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 4) no Hoare annotation was computed. [2018-10-24 12:29:20,028 INFO L425 ceAbstractionStarter]: For program point L4(line 4) no Hoare annotation was computed. [2018-10-24 12:29:20,028 INFO L425 ceAbstractionStarter]: For program point L3(lines 3 5) no Hoare annotation was computed. [2018-10-24 12:29:20,034 WARN L1239 BoogieBacktranslator]: unknown boogie variable #memory_int [2018-10-24 12:29:20,040 WARN L1239 BoogieBacktranslator]: unknown boogie variable #memory_int [2018-10-24 12:29:20,042 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 12:29:20 BoogieIcfgContainer [2018-10-24 12:29:20,042 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-24 12:29:20,043 INFO L168 Benchmark]: Toolchain (without parser) took 4059.44 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 756.5 MB). Free memory was 1.4 GB in the beginning and 2.1 GB in the end (delta: -637.3 MB). Peak memory consumption was 119.3 MB. Max. memory is 7.1 GB. [2018-10-24 12:29:20,045 INFO L168 Benchmark]: CDTParser took 0.19 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 12:29:20,045 INFO L168 Benchmark]: CACSL2BoogieTranslator took 296.47 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 12:29:20,046 INFO L168 Benchmark]: Boogie Procedure Inliner took 46.99 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 12:29:20,047 INFO L168 Benchmark]: Boogie Preprocessor took 41.48 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 12:29:20,047 INFO L168 Benchmark]: RCFGBuilder took 487.97 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 756.5 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -800.2 MB). Peak memory consumption was 26.5 MB. Max. memory is 7.1 GB. [2018-10-24 12:29:20,048 INFO L168 Benchmark]: TraceAbstraction took 3181.27 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: 152.3 MB). Peak memory consumption was 152.3 MB. Max. memory is 7.1 GB. [2018-10-24 12:29:20,053 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 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 296.47 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 46.99 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 41.48 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 487.97 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 756.5 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -800.2 MB). Peak memory consumption was 26.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3181.27 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: 152.3 MB). Peak memory consumption was 152.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 4]: 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: 11]: Loop Invariant [2018-10-24 12:29:20,061 WARN L1239 BoogieBacktranslator]: unknown boogie variable #memory_int [2018-10-24 12:29:20,062 WARN L1239 BoogieBacktranslator]: unknown boogie variable #memory_int Derived loop invariant: (i < 1025 && unknown-#memory_int-unknown[A][4 * i + A + -4] + 1 == i) || i == 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 22 locations, 1 error locations. SAFE Result, 3.1s OverallTime, 4 OverallIterations, 3 TraceHistogramMax, 0.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 58 SDtfs, 7 SDslu, 82 SDs, 0 SdLazy, 52 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 86 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.3s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 2 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 10 PreInvPairs, 13 NumberOfFragments, 73 HoareAnnotationTreeSize, 10 FomulaSimplifications, 21 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 95 NumberOfCodeBlocks, 92 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 122 ConstructedInterpolants, 1 QuantifiedInterpolants, 5848 SizeOfPredicates, 17 NumberOfNonLiveVariables, 158 ConjunctsInSsa, 30 ConjunctsInUnsatCore, 8 InterpolantComputations, 4 PerfectInterpolantSequences, 14/27 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...