java -ea -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/ai/array-bench/reach_32bit_array_oct.epf -i ../../../trunk/examples/programs/heapseparator/speedup-poc-dd-1-unlimited.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-1377b90 [2019-01-07 14:45:46,138 INFO L170 SettingsManager]: Resetting all preferences to default values... [2019-01-07 14:45:46,141 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2019-01-07 14:45:46,157 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-01-07 14:45:46,196 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/array-bench/reach_32bit_array_oct.epf [2019-01-07 14:45:46,217 INFO L110 SettingsManager]: Loading preferences was successful [2019-01-07 14:45:46,217 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2019-01-07 14:45:46,218 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2019-01-07 14:45:46,218 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2019-01-07 14:45:46,218 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-01-07 14:45:46,218 INFO L133 SettingsManager]: * User list type=DISABLED [2019-01-07 14:45:46,222 INFO L133 SettingsManager]: * Inline calls to unimplemented procedures=true [2019-01-07 14:45:46,222 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-01-07 14:45:46,222 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-01-07 14:45:46,223 INFO L133 SettingsManager]: * Underlying domain=OctagonDomain [2019-01-07 14:45:46,223 INFO L133 SettingsManager]: * Abstract domain=ArrayDomain [2019-01-07 14:45:46,223 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-01-07 14:45:46,223 INFO L133 SettingsManager]: * Interval Domain=false [2019-01-07 14:45:46,224 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-01-07 14:45:46,224 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2019-01-07 14:45:46,224 INFO L133 SettingsManager]: * Use SBE=true [2019-01-07 14:45:46,226 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-01-07 14:45:46,226 INFO L133 SettingsManager]: * sizeof long=4 [2019-01-07 14:45:46,226 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2019-01-07 14:45:46,226 INFO L133 SettingsManager]: * sizeof POINTER=4 [2019-01-07 14:45:46,226 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2019-01-07 14:45:46,227 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-01-07 14:45:46,227 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-01-07 14:45:46,227 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-01-07 14:45:46,227 INFO L133 SettingsManager]: * sizeof long double=12 [2019-01-07 14:45:46,228 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2019-01-07 14:45:46,228 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-01-07 14:45:46,228 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-01-07 14:45:46,228 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-01-07 14:45:46,228 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2019-01-07 14:45:46,229 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-01-07 14:45:46,229 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-01-07 14:45:46,229 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-01-07 14:45:46,229 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-01-07 14:45:46,229 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-01-07 14:45:46,230 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-01-07 14:45:46,230 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-01-07 14:45:46,230 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-01-07 14:45:46,231 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-01-07 14:45:46,292 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-01-07 14:45:46,309 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-01-07 14:45:46,313 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-01-07 14:45:46,316 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2019-01-07 14:45:46,316 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2019-01-07 14:45:46,317 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-1-unlimited.bpl [2019-01-07 14:45:46,318 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-1-unlimited.bpl' [2019-01-07 14:45:46,371 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-01-07 14:45:46,372 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-01-07 14:45:46,373 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-01-07 14:45:46,373 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-01-07 14:45:46,373 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2019-01-07 14:45:46,393 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "speedup-poc-dd-1-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 07.01 02:45:46" (1/1) ... [2019-01-07 14:45:46,409 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "speedup-poc-dd-1-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 07.01 02:45:46" (1/1) ... [2019-01-07 14:45:46,430 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-01-07 14:45:46,431 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-01-07 14:45:46,431 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-01-07 14:45:46,432 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2019-01-07 14:45:46,443 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "speedup-poc-dd-1-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 07.01 02:45:46" (1/1) ... [2019-01-07 14:45:46,444 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "speedup-poc-dd-1-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 07.01 02:45:46" (1/1) ... [2019-01-07 14:45:46,445 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "speedup-poc-dd-1-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 07.01 02:45:46" (1/1) ... [2019-01-07 14:45:46,445 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "speedup-poc-dd-1-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 07.01 02:45:46" (1/1) ... [2019-01-07 14:45:46,447 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "speedup-poc-dd-1-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 07.01 02:45:46" (1/1) ... [2019-01-07 14:45:46,451 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "speedup-poc-dd-1-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 07.01 02:45:46" (1/1) ... [2019-01-07 14:45:46,451 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "speedup-poc-dd-1-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 07.01 02:45:46" (1/1) ... [2019-01-07 14:45:46,453 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-01-07 14:45:46,454 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-01-07 14:45:46,454 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-01-07 14:45:46,454 INFO L276 PluginConnector]: RCFGBuilder initialized [2019-01-07 14:45:46,455 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "speedup-poc-dd-1-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 07.01 02:45:46" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-01-07 14:45:46,524 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-01-07 14:45:46,524 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-01-07 14:45:46,830 INFO L281 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-01-07 14:45:46,830 INFO L286 CfgBuilder]: Removed 5 assue(true) statements. [2019-01-07 14:45:46,831 INFO L202 PluginConnector]: Adding new model speedup-poc-dd-1-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.01 02:45:46 BoogieIcfgContainer [2019-01-07 14:45:46,832 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-01-07 14:45:46,833 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-01-07 14:45:46,833 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-01-07 14:45:46,836 INFO L276 PluginConnector]: TraceAbstraction initialized [2019-01-07 14:45:46,837 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "speedup-poc-dd-1-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 07.01 02:45:46" (1/2) ... [2019-01-07 14:45:46,838 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a602048 and model type speedup-poc-dd-1-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.01 02:45:46, skipping insertion in model container [2019-01-07 14:45:46,838 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "speedup-poc-dd-1-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.01 02:45:46" (2/2) ... [2019-01-07 14:45:46,840 INFO L112 eAbstractionObserver]: Analyzing ICFG speedup-poc-dd-1-unlimited.bpl [2019-01-07 14:45:46,851 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-01-07 14:45:46,860 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-01-07 14:45:46,879 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-01-07 14:45:46,912 INFO L382 AbstractCegarLoop]: Interprodecural is true [2019-01-07 14:45:46,912 INFO L383 AbstractCegarLoop]: Hoare is true [2019-01-07 14:45:46,913 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-01-07 14:45:46,913 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-01-07 14:45:46,913 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-01-07 14:45:46,913 INFO L387 AbstractCegarLoop]: Difference is false [2019-01-07 14:45:46,913 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-01-07 14:45:46,914 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-01-07 14:45:46,927 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states. [2019-01-07 14:45:46,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2019-01-07 14:45:46,934 INFO L394 BasicCegarLoop]: Found error trace [2019-01-07 14:45:46,935 INFO L402 BasicCegarLoop]: trace histogram [1, 1] [2019-01-07 14:45:46,937 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-01-07 14:45:46,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 14:45:46,943 INFO L82 PathProgramCache]: Analyzing trace with hash 967, now seen corresponding path program 1 times [2019-01-07 14:45:46,945 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-07 14:45:46,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 14:45:46,994 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 14:45:46,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 14:45:46,995 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-07 14:45:47,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 14:45:47,259 INFO L273 TraceCheckUtils]: 0: Hoare triple {8#true} havoc main_p1;malloc_old_#valid := #valid;havoc malloc_ptr;havoc #valid;assume malloc_old_#valid[malloc_ptr] == 0;assume #valid == malloc_old_#valid[malloc_ptr := 1];main_p1 := malloc_ptr;#memory_int := #memory_int[main_p1 := 0]; {10#(= (select |#memory_int| ULTIMATE.start_main_p1) 0)} is VALID [2019-01-07 14:45:47,264 INFO L273 TraceCheckUtils]: 1: Hoare triple {10#(= (select |#memory_int| ULTIMATE.start_main_p1) 0)} assume !(#memory_int[main_p1] >= 0); {9#false} is VALID [2019-01-07 14:45:47,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 14:45:47,268 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-07 14:45:47,268 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-01-07 14:45:47,269 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-07 14:45:47,274 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2019-01-07 14:45:47,276 INFO L84 Accepts]: Finished accepts. word is accepted. [2019-01-07 14:45:47,279 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 3 states. [2019-01-07 14:45:47,301 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 2 edges. 2 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2019-01-07 14:45:47,301 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-01-07 14:45:47,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-01-07 14:45:47,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-07 14:45:47,315 INFO L87 Difference]: Start difference. First operand 5 states. Second operand 3 states. [2019-01-07 14:45:47,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-07 14:45:47,470 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2019-01-07 14:45:47,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-07 14:45:47,470 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2019-01-07 14:45:47,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-07 14:45:47,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2019-01-07 14:45:47,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 9 transitions. [2019-01-07 14:45:47,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2019-01-07 14:45:47,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 9 transitions. [2019-01-07 14:45:47,478 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 3 states and 9 transitions. [2019-01-07 14:45:47,527 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 9 edges. 9 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2019-01-07 14:45:47,536 INFO L225 Difference]: With dead ends: 9 [2019-01-07 14:45:47,537 INFO L226 Difference]: Without dead ends: 4 [2019-01-07 14:45:47,540 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-07 14:45:47,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4 states. [2019-01-07 14:45:47,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4 to 4. [2019-01-07 14:45:47,616 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2019-01-07 14:45:47,617 INFO L82 GeneralOperation]: Start isEquivalent. First operand 4 states. Second operand 4 states. [2019-01-07 14:45:47,618 INFO L74 IsIncluded]: Start isIncluded. First operand 4 states. Second operand 4 states. [2019-01-07 14:45:47,618 INFO L87 Difference]: Start difference. First operand 4 states. Second operand 4 states. [2019-01-07 14:45:47,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-07 14:45:47,619 INFO L93 Difference]: Finished difference Result 4 states and 4 transitions. [2019-01-07 14:45:47,620 INFO L276 IsEmpty]: Start isEmpty. Operand 4 states and 4 transitions. [2019-01-07 14:45:47,620 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-01-07 14:45:47,620 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2019-01-07 14:45:47,620 INFO L74 IsIncluded]: Start isIncluded. First operand 4 states. Second operand 4 states. [2019-01-07 14:45:47,621 INFO L87 Difference]: Start difference. First operand 4 states. Second operand 4 states. [2019-01-07 14:45:47,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-07 14:45:47,622 INFO L93 Difference]: Finished difference Result 4 states and 4 transitions. [2019-01-07 14:45:47,622 INFO L276 IsEmpty]: Start isEmpty. Operand 4 states and 4 transitions. [2019-01-07 14:45:47,622 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-01-07 14:45:47,622 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2019-01-07 14:45:47,623 INFO L88 GeneralOperation]: Finished isEquivalent. [2019-01-07 14:45:47,623 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2019-01-07 14:45:47,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-01-07 14:45:47,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 4 transitions. [2019-01-07 14:45:47,626 INFO L78 Accepts]: Start accepts. Automaton has 4 states and 4 transitions. Word has length 2 [2019-01-07 14:45:47,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-07 14:45:47,626 INFO L480 AbstractCegarLoop]: Abstraction has 4 states and 4 transitions. [2019-01-07 14:45:47,626 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-01-07 14:45:47,627 INFO L276 IsEmpty]: Start isEmpty. Operand 4 states and 4 transitions. [2019-01-07 14:45:47,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-07 14:45:47,627 INFO L394 BasicCegarLoop]: Found error trace [2019-01-07 14:45:47,627 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-07 14:45:47,628 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-01-07 14:45:47,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 14:45:47,628 INFO L82 PathProgramCache]: Analyzing trace with hash 29921, now seen corresponding path program 1 times [2019-01-07 14:45:47,628 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-07 14:45:47,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 14:45:47,630 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 14:45:47,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 14:45:47,630 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-07 14:45:47,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 14:45:47,970 INFO L273 TraceCheckUtils]: 0: Hoare triple {38#true} havoc main_p1;malloc_old_#valid := #valid;havoc malloc_ptr;havoc #valid;assume malloc_old_#valid[malloc_ptr] == 0;assume #valid == malloc_old_#valid[malloc_ptr := 1];main_p1 := malloc_ptr;#memory_int := #memory_int[main_p1 := 0]; {40#(= (select |#memory_int| ULTIMATE.start_main_p1) 0)} is VALID [2019-01-07 14:45:47,980 INFO L273 TraceCheckUtils]: 1: Hoare triple {40#(= (select |#memory_int| ULTIMATE.start_main_p1) 0)} #memory_int := #memory_int[main_p1 := #memory_int[main_p1] + 1]; {41#(<= 1 (select |#memory_int| ULTIMATE.start_main_p1))} is VALID [2019-01-07 14:45:47,993 INFO L273 TraceCheckUtils]: 2: Hoare triple {41#(<= 1 (select |#memory_int| ULTIMATE.start_main_p1))} assume !(#memory_int[main_p1] >= 0); {39#false} is VALID [2019-01-07 14:45:47,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 14:45:47,995 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 14:45:47,995 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-07 14:45:47,996 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-07 14:45:47,998 INFO L207 CegarAbsIntRunner]: [0], [4], [6] [2019-01-07 14:45:48,061 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-07 14:45:48,061 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-07 14:45:51,010 WARN L212 ngHoareTripleChecker]: Soundness check inconclusive for the following hoare triple [2019-01-07 14:45:51,011 WARN L217 ngHoareTripleChecker]: Expected: VALID Actual: UNKNOWN [2019-01-07 14:45:51,011 WARN L219 ngHoareTripleChecker]: Solver was "Z3" in version "4.8.3" [2019-01-07 14:45:51,012 WARN L223 ngHoareTripleChecker]: -- [2019-01-07 14:45:51,013 WARN L224 ngHoareTripleChecker]: Pre: {2147483647#(forall ((v_idx_3 Int) (v_idx_4 Int) (v_idx_5 Int) (v_idx_1 Int) (v_idx_2 Int)) (exists ((v_v_0_1 Int) (v_v_1_1 Int) (v_v_2_1 Int) (v_v_3_1 Int) (v_v_4_1 Int)) (and (= (select |c_old(#memory_int)| v_idx_5) v_v_4_1) (= (select |c_ULTIMATE.start_malloc_old_#valid| v_idx_1) v_v_0_1) (= v_v_2_1 (select |c_old(#valid)| v_idx_3)) (= v_v_1_1 (select |c_#valid| v_idx_2)) (= v_v_3_1 (select |c_#memory_int| v_idx_4)))))} [2019-01-07 14:45:51,013 WARN L228 ngHoareTripleChecker]: Action: havoc main_p1;malloc_old_#valid := #valid;havoc malloc_ptr;havoc #valid;assume malloc_old_#valid[malloc_ptr] == 0;assume #valid == malloc_old_#valid[malloc_ptr := 1];main_p1 := malloc_ptr;#memory_int := #memory_int[main_p1 := 0]; [2019-01-07 14:45:51,014 WARN L184 hOps$ForEachOp$OfRef]: ActionStr: (and (= (store |c_ULTIMATE.start_malloc_old_#valid_primed| c_ULTIMATE.start_malloc_ptr_primed 1) |c_#valid_primed|) (= |c_#memory_int_primed| (store |c_#memory_int| c_ULTIMATE.start_main_p1_primed 0)) (= c_ULTIMATE.start_main_p1_primed c_ULTIMATE.start_malloc_ptr_primed) (= |c_ULTIMATE.start_malloc_old_#valid_primed| |c_#valid|) (= (select |c_ULTIMATE.start_malloc_old_#valid_primed| c_ULTIMATE.start_malloc_ptr_primed) 0)) [2019-01-07 14:45:51,015 WARN L230 ngHoareTripleChecker]: Post: {2147483646#(forall ((v_idx_7 Int) (v_idx_14 Int) (v_idx_8 Int) (v_idx_15 Int) (v_idx_9 Int) (v_idx_12 Int) (v_idx_13 Int) (v_idx_10 Int) (v_idx_11 Int) (v_idx_6 Int) (v_idx_16 Int)) (exists ((v_v_13_1 Int) (v_b_6_1 Int) (v_b_7_1 Int) (v_v_14_1 Int) (v_b_4_1 Int) (v_b_5_1 Int) (v_v_12_1 Int) (v_v_17_1 Int) (v_v_15_1 Int) (v_v_16_1 Int) (v_v_8_1 Int) (v_v_2_1 Int) (v_v_4_1 Int) (v_v_6_1 Int) (v_b_0_1 Int) (v_b_1_1 Int) (v_v_7_1 Int)) (and (<= (- v_b_1_1 v_b_6_1) 1) (= v_b_1_1 (+ v_b_4_1 1)) (or (= v_v_6_1 (select |c_ULTIMATE.start_malloc_old_#valid| v_idx_10)) (<= v_b_0_1 v_idx_10)) (= v_v_2_1 (select |c_old(#valid)| v_idx_13)) (or (< v_idx_9 v_b_7_1) (= (select |c_#memory_int| v_idx_9) v_v_17_1)) (<= (- (- c_ULTIMATE.start_main_p1) (- v_b_5_1)) 1) (<= (- (- v_v_16_1) v_v_16_1) 0) (<= (- v_b_1_1 v_b_7_1) 0) (<= (- v_b_4_1 v_b_6_1) 0) (<= (- (- v_v_7_1) v_v_7_1) 0) (or (= (select |c_#memory_int| v_idx_7) v_v_15_1) (<= v_b_6_1 v_idx_7)) (<= (- v_b_0_1 v_b_1_1) (- 1)) (<= (- (- v_b_4_1) (- v_b_6_1)) 0) (<= (- c_ULTIMATE.start_main_p1 v_b_4_1) 0) (<= (- (- v_b_0_1) (- v_b_4_1)) 0) (= c_ULTIMATE.start_malloc_ptr c_ULTIMATE.start_main_p1) (<= (- (- c_ULTIMATE.start_main_p1) (- v_b_1_1)) 1) (or (< v_idx_15 v_b_4_1) (<= v_b_5_1 v_idx_15) (= (select |c_#valid| v_idx_15) v_v_13_1)) (<= (- (- v_v_16_1) v_v_7_1) 0) (<= (- (- c_ULTIMATE.start_malloc_ptr) (- v_b_4_1)) 0) (<= (- (- c_ULTIMATE.start_main_p1) (- v_b_0_1)) 0) (<= (- (- c_ULTIMATE.start_main_p1) (- v_b_7_1)) 1) (= (+ c_ULTIMATE.start_malloc_ptr 1) v_b_1_1) (= c_ULTIMATE.start_malloc_ptr (+ v_b_1_1 (- 1))) (<= (- (- v_b_0_1) (- v_b_6_1)) 0) (= c_ULTIMATE.start_malloc_ptr (+ v_b_5_1 (- 1))) (<= (- (- v_v_13_1) (- v_v_7_1)) (- 1)) (<= (- (- c_ULTIMATE.start_malloc_ptr) (- v_b_7_1)) 1) (= v_b_1_1 (+ v_b_6_1 1)) (<= (- (- v_b_4_1) (- v_b_7_1)) 1) (<= (- c_ULTIMATE.start_malloc_ptr v_b_6_1) 0) (<= (- (- c_ULTIMATE.start_malloc_ptr) (- v_b_0_1)) 0) (<= (- v_v_16_1 v_v_7_1) 0) (= c_ULTIMATE.start_malloc_ptr v_b_0_1) (<= (- v_v_16_1 (- v_v_7_1)) 0) (= v_b_7_1 v_b_1_1) (<= (- c_ULTIMATE.start_main_p1 v_b_7_1) (- 1)) (or (<= v_b_1_1 v_idx_11) (< v_idx_11 v_b_0_1) (= (select |c_ULTIMATE.start_malloc_old_#valid| v_idx_11) v_v_7_1)) (<= (- c_ULTIMATE.start_malloc_ptr v_b_0_1) 0) (<= (- c_ULTIMATE.start_malloc_ptr v_b_5_1) (- 1)) (<= (- v_v_7_1 (- v_v_7_1)) 0) (= v_b_5_1 v_b_1_1) (<= (- v_v_13_1 (- v_v_16_1)) 1) (= (select |c_old(#memory_int)| v_idx_6) v_v_4_1) (<= (- v_b_0_1 v_b_6_1) 0) (<= (- v_v_13_1 v_v_7_1) 1) (<= (- v_b_1_1 v_b_4_1) 1) (<= (- c_ULTIMATE.start_malloc_ptr v_b_4_1) 0) (<= (- v_b_5_1 v_b_6_1) 1) (<= (- v_v_13_1 (- v_v_13_1)) 2) (= c_ULTIMATE.start_malloc_ptr (+ v_b_7_1 (- 1))) (or (< v_idx_8 v_b_6_1) (= v_v_16_1 (select |c_#memory_int| v_idx_8)) (<= v_b_7_1 v_idx_8)) (<= (- (- v_b_1_1) (- v_b_5_1)) 0) (<= (- (- v_b_5_1) (- v_b_7_1)) 0) (<= (- (- v_v_13_1) v_v_13_1) (- 2)) (<= (- v_v_13_1 (- v_v_7_1)) 1) (= c_ULTIMATE.start_malloc_ptr v_b_6_1) (<= (- (- v_b_0_1) (- v_b_1_1)) 1) (<= (- c_ULTIMATE.start_malloc_ptr v_b_7_1) (- 1)) (<= (- (- v_b_4_1) (- v_b_5_1)) 1) (<= (- (- v_v_13_1) v_v_16_1) (- 1)) (<= (- v_b_1_1 v_b_5_1) 0) (<= (- v_b_4_1 v_b_7_1) (- 1)) (<= (- (- v_b_1_1) (- v_b_6_1)) (- 1)) (<= (- v_b_4_1 v_b_5_1) (- 1)) (<= (- (- c_ULTIMATE.start_malloc_ptr) (- v_b_1_1)) 1) (<= (- c_ULTIMATE.start_malloc_ptr v_b_1_1) (- 1)) (<= (- (- v_v_13_1) (- v_v_16_1)) (- 1)) (= c_ULTIMATE.start_malloc_ptr v_b_4_1) (or (= (select |c_#valid| v_idx_14) v_v_12_1) (<= v_b_4_1 v_idx_14)) (<= (- c_ULTIMATE.start_main_p1 v_b_1_1) (- 1)) (<= (- c_ULTIMATE.start_main_p1 v_b_6_1) 0) (<= (- (- c_ULTIMATE.start_main_p1) (- v_b_6_1)) 0) (<= (- v_b_5_1 v_b_7_1) 0) (or (= (select |c_ULTIMATE.start_malloc_old_#valid| v_idx_12) v_v_8_1) (< v_idx_12 v_b_1_1)) (<= (- (- v_b_6_1) (- v_b_7_1)) 1) (<= (- (- v_b_1_1) (- v_b_4_1)) (- 1)) (<= (- (- v_b_0_1) (- v_b_7_1)) 1) (<= (- (- c_ULTIMATE.start_malloc_ptr) (- v_b_5_1)) 1) (<= (- (- v_b_1_1) (- v_b_7_1)) 0) (<= (- v_v_16_1 (- v_v_16_1)) 0) (<= (- (- c_ULTIMATE.start_main_p1) (- c_ULTIMATE.start_malloc_ptr)) 0) (<= (- v_b_0_1 v_b_4_1) 0) (<= (- (- c_ULTIMATE.start_malloc_ptr) (- v_b_6_1)) 0) (= v_b_1_1 (+ v_b_0_1 1)) (<= (- (- v_b_5_1) (- v_b_6_1)) (- 1)) (<= (- (- c_ULTIMATE.start_main_p1) (- v_b_4_1)) 0) (<= (- v_b_6_1 v_b_7_1) (- 1)) (<= (- c_ULTIMATE.start_main_p1 v_b_5_1) (- 1)) (<= (- v_b_0_1 v_b_7_1) (- 1)) (<= (- v_v_13_1 v_v_16_1) 1) (<= (- v_b_0_1 v_b_5_1) (- 1)) (<= (- (- v_v_13_1) v_v_7_1) (- 1)) (or (= (select |c_#valid| v_idx_16) v_v_14_1) (< v_idx_16 v_b_5_1)) (<= (- (- v_b_0_1) (- v_b_5_1)) 1) (<= (- (- v_v_16_1) (- v_v_7_1)) 0) (<= (- c_ULTIMATE.start_main_p1 v_b_0_1) 0) (<= (- c_ULTIMATE.start_main_p1 c_ULTIMATE.start_malloc_ptr) 0) (= v_b_1_1 (+ c_ULTIMATE.start_main_p1 1)))))} [2019-01-07 14:45:51,015 WARN L263 ngHoareTripleChecker]: unsat core / model generation is disabled, enable it to get more details [2019-01-07 14:45:51,153 WARN L268 ngHoareTripleChecker]: -- [2019-01-07 14:45:51,154 WARN L269 ngHoareTripleChecker]: Simplified triple [2019-01-07 14:45:51,165 WARN L270 ngHoareTripleChecker]: Pre: {2147483647#true} [2019-01-07 14:45:51,165 WARN L274 ngHoareTripleChecker]: Action: havoc main_p1;malloc_old_#valid := #valid;havoc malloc_ptr;havoc #valid;assume malloc_old_#valid[malloc_ptr] == 0;assume #valid == malloc_old_#valid[malloc_ptr := 1];main_p1 := malloc_ptr;#memory_int := #memory_int[main_p1 := 0]; [2019-01-07 14:45:51,166 WARN L184 hOps$ForEachOp$OfRef]: ActionStr: (and (= (store |c_ULTIMATE.start_malloc_old_#valid_primed| c_ULTIMATE.start_malloc_ptr_primed 1) |c_#valid_primed|) (= |c_#memory_int_primed| (store |c_#memory_int| c_ULTIMATE.start_main_p1_primed 0)) (= c_ULTIMATE.start_main_p1_primed c_ULTIMATE.start_malloc_ptr_primed) (= |c_ULTIMATE.start_malloc_old_#valid_primed| |c_#valid|) (= (select |c_ULTIMATE.start_malloc_old_#valid_primed| c_ULTIMATE.start_malloc_ptr_primed) 0))