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_compound_exp_cong.epf -i ../../../trunk/examples/programs/heapseparator/speedup-poc-dd-2-unlimited.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-b7bd044-m [2019-01-18 14:19:11,560 INFO L170 SettingsManager]: Resetting all preferences to default values... [2019-01-18 14:19:11,566 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2019-01-18 14:19:11,577 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-01-18 14:19:11,611 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/array-bench/reach_32bit_compound_exp_cong.epf [2019-01-18 14:19:11,625 INFO L110 SettingsManager]: Loading preferences was successful [2019-01-18 14:19:11,626 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2019-01-18 14:19:11,627 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2019-01-18 14:19:11,630 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2019-01-18 14:19:11,630 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-01-18 14:19:11,630 INFO L133 SettingsManager]: * User list type=DISABLED [2019-01-18 14:19:11,630 INFO L133 SettingsManager]: * Inline calls to unimplemented procedures=true [2019-01-18 14:19:11,631 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-01-18 14:19:11,631 INFO L133 SettingsManager]: * Explicit value domain=true [2019-01-18 14:19:11,631 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-01-18 14:19:11,631 INFO L133 SettingsManager]: * Octagon Domain=false [2019-01-18 14:19:11,631 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2019-01-18 14:19:11,631 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-01-18 14:19:11,632 INFO L133 SettingsManager]: * Interval Domain=false [2019-01-18 14:19:11,632 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-01-18 14:19:11,633 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2019-01-18 14:19:11,633 INFO L133 SettingsManager]: * Use SBE=true [2019-01-18 14:19:11,633 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-01-18 14:19:11,633 INFO L133 SettingsManager]: * sizeof long=4 [2019-01-18 14:19:11,633 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2019-01-18 14:19:11,634 INFO L133 SettingsManager]: * sizeof POINTER=4 [2019-01-18 14:19:11,634 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2019-01-18 14:19:11,634 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-01-18 14:19:11,634 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-01-18 14:19:11,634 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-01-18 14:19:11,634 INFO L133 SettingsManager]: * sizeof long double=12 [2019-01-18 14:19:11,635 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2019-01-18 14:19:11,635 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-01-18 14:19:11,635 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-01-18 14:19:11,635 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-01-18 14:19:11,635 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2019-01-18 14:19:11,636 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-01-18 14:19:11,636 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-01-18 14:19:11,636 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-01-18 14:19:11,636 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-01-18 14:19:11,636 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-01-18 14:19:11,637 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-01-18 14:19:11,637 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-01-18 14:19:11,637 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-01-18 14:19:11,637 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-01-18 14:19:11,681 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-01-18 14:19:11,695 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-01-18 14:19:11,698 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-01-18 14:19:11,700 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2019-01-18 14:19:11,700 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2019-01-18 14:19:11,701 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-2-unlimited.bpl [2019-01-18 14:19:11,701 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-2-unlimited.bpl' [2019-01-18 14:19:11,738 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-01-18 14:19:11,740 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-01-18 14:19:11,741 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-01-18 14:19:11,741 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-01-18 14:19:11,741 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2019-01-18 14:19:11,759 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "speedup-poc-dd-2-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:19:11" (1/1) ... [2019-01-18 14:19:11,771 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "speedup-poc-dd-2-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:19:11" (1/1) ... [2019-01-18 14:19:11,801 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-01-18 14:19:11,802 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-01-18 14:19:11,802 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-01-18 14:19:11,802 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2019-01-18 14:19:11,813 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "speedup-poc-dd-2-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:19:11" (1/1) ... [2019-01-18 14:19:11,814 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "speedup-poc-dd-2-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:19:11" (1/1) ... [2019-01-18 14:19:11,815 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "speedup-poc-dd-2-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:19:11" (1/1) ... [2019-01-18 14:19:11,816 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "speedup-poc-dd-2-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:19:11" (1/1) ... [2019-01-18 14:19:11,819 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "speedup-poc-dd-2-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:19:11" (1/1) ... [2019-01-18 14:19:11,824 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "speedup-poc-dd-2-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:19:11" (1/1) ... [2019-01-18 14:19:11,826 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "speedup-poc-dd-2-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:19:11" (1/1) ... [2019-01-18 14:19:11,827 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-01-18 14:19:11,828 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-01-18 14:19:11,828 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-01-18 14:19:11,828 INFO L276 PluginConnector]: RCFGBuilder initialized [2019-01-18 14:19:11,829 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "speedup-poc-dd-2-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:19:11" (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 [2019-01-18 14:19:11,902 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-01-18 14:19:11,903 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-01-18 14:19:12,313 INFO L281 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-01-18 14:19:12,313 INFO L286 CfgBuilder]: Removed 7 assue(true) statements. [2019-01-18 14:19:12,314 INFO L202 PluginConnector]: Adding new model speedup-poc-dd-2-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 02:19:12 BoogieIcfgContainer [2019-01-18 14:19:12,315 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-01-18 14:19:12,316 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-01-18 14:19:12,316 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-01-18 14:19:12,319 INFO L276 PluginConnector]: TraceAbstraction initialized [2019-01-18 14:19:12,319 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "speedup-poc-dd-2-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:19:11" (1/2) ... [2019-01-18 14:19:12,320 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b62e5c3 and model type speedup-poc-dd-2-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.01 02:19:12, skipping insertion in model container [2019-01-18 14:19:12,321 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "speedup-poc-dd-2-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 02:19:12" (2/2) ... [2019-01-18 14:19:12,322 INFO L112 eAbstractionObserver]: Analyzing ICFG speedup-poc-dd-2-unlimited.bpl [2019-01-18 14:19:12,332 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-01-18 14:19:12,339 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2019-01-18 14:19:12,356 INFO L257 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2019-01-18 14:19:12,390 INFO L382 AbstractCegarLoop]: Interprodecural is true [2019-01-18 14:19:12,390 INFO L383 AbstractCegarLoop]: Hoare is true [2019-01-18 14:19:12,390 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-01-18 14:19:12,391 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-01-18 14:19:12,391 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-01-18 14:19:12,391 INFO L387 AbstractCegarLoop]: Difference is false [2019-01-18 14:19:12,391 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-01-18 14:19:12,391 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-01-18 14:19:12,410 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2019-01-18 14:19:12,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2019-01-18 14:19:12,424 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 14:19:12,425 INFO L402 BasicCegarLoop]: trace histogram [1, 1] [2019-01-18 14:19:12,429 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-01-18 14:19:12,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 14:19:12,438 INFO L82 PathProgramCache]: Analyzing trace with hash 972, now seen corresponding path program 1 times [2019-01-18 14:19:12,440 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 14:19:12,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 14:19:12,495 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 14:19:12,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 14:19:12,496 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 14:19:12,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 14:19:12,659 INFO L273 TraceCheckUtils]: 0: Hoare triple {10#true} havoc main_p1, main_p2;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;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_p2 := malloc_ptr;#memory_int := #memory_int[main_p1 := 0];#memory_int := #memory_int[main_p2 := 0]; {12#(= (select |#memory_int| ULTIMATE.start_main_p1) 0)} is VALID [2019-01-18 14:19:12,664 INFO L273 TraceCheckUtils]: 1: Hoare triple {12#(= (select |#memory_int| ULTIMATE.start_main_p1) 0)} assume !(#memory_int[main_p1] >= 0); {11#false} is VALID [2019-01-18 14:19:12,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 14:19:12,669 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-18 14:19:12,669 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-01-18 14:19:12,670 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-18 14:19:12,675 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2019-01-18 14:19:12,677 INFO L84 Accepts]: Finished accepts. word is accepted. [2019-01-18 14:19:12,681 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 3 states. [2019-01-18 14:19:12,712 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 2 edges. 2 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2019-01-18 14:19:12,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-01-18 14:19:12,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-01-18 14:19:12,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-18 14:19:12,722 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2019-01-18 14:19:12,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 14:19:12,851 INFO L93 Difference]: Finished difference Result 13 states and 15 transitions. [2019-01-18 14:19:12,851 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-18 14:19:12,851 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2019-01-18 14:19:12,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 14:19:12,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2019-01-18 14:19:12,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 15 transitions. [2019-01-18 14:19:12,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2019-01-18 14:19:12,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 15 transitions. [2019-01-18 14:19:12,858 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 3 states and 15 transitions. [2019-01-18 14:19:12,934 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 15 edges. 15 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2019-01-18 14:19:12,944 INFO L225 Difference]: With dead ends: 13 [2019-01-18 14:19:12,944 INFO L226 Difference]: Without dead ends: 8 [2019-01-18 14:19:12,948 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-18 14:19:12,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2019-01-18 14:19:13,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 6. [2019-01-18 14:19:13,017 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2019-01-18 14:19:13,018 INFO L82 GeneralOperation]: Start isEquivalent. First operand 8 states. Second operand 6 states. [2019-01-18 14:19:13,019 INFO L74 IsIncluded]: Start isIncluded. First operand 8 states. Second operand 6 states. [2019-01-18 14:19:13,019 INFO L87 Difference]: Start difference. First operand 8 states. Second operand 6 states. [2019-01-18 14:19:13,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 14:19:13,022 INFO L93 Difference]: Finished difference Result 8 states and 10 transitions. [2019-01-18 14:19:13,022 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 10 transitions. [2019-01-18 14:19:13,023 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-01-18 14:19:13,023 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2019-01-18 14:19:13,024 INFO L74 IsIncluded]: Start isIncluded. First operand 6 states. Second operand 8 states. [2019-01-18 14:19:13,024 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 8 states. [2019-01-18 14:19:13,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 14:19:13,026 INFO L93 Difference]: Finished difference Result 8 states and 10 transitions. [2019-01-18 14:19:13,027 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 10 transitions. [2019-01-18 14:19:13,027 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-01-18 14:19:13,027 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2019-01-18 14:19:13,028 INFO L88 GeneralOperation]: Finished isEquivalent. [2019-01-18 14:19:13,028 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2019-01-18 14:19:13,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-01-18 14:19:13,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 9 transitions. [2019-01-18 14:19:13,033 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 9 transitions. Word has length 2 [2019-01-18 14:19:13,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 14:19:13,034 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 9 transitions. [2019-01-18 14:19:13,035 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-01-18 14:19:13,035 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 9 transitions. [2019-01-18 14:19:13,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-18 14:19:13,036 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 14:19:13,036 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-18 14:19:13,036 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-01-18 14:19:13,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 14:19:13,037 INFO L82 PathProgramCache]: Analyzing trace with hash 29988, now seen corresponding path program 1 times [2019-01-18 14:19:13,037 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 14:19:13,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 14:19:13,038 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 14:19:13,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 14:19:13,039 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 14:19:13,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 14:19:13,482 INFO L273 TraceCheckUtils]: 0: Hoare triple {54#true} havoc main_p1, main_p2;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;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_p2 := malloc_ptr;#memory_int := #memory_int[main_p1 := 0];#memory_int := #memory_int[main_p2 := 0]; {56#(= (select |#memory_int| ULTIMATE.start_main_p1) 0)} is VALID [2019-01-18 14:19:13,497 INFO L273 TraceCheckUtils]: 1: Hoare triple {56#(= (select |#memory_int| ULTIMATE.start_main_p1) 0)} #memory_int := #memory_int[main_p1 := #memory_int[main_p1] + 1]; {57#(<= 0 (select |#memory_int| ULTIMATE.start_main_p1))} is VALID [2019-01-18 14:19:13,510 INFO L273 TraceCheckUtils]: 2: Hoare triple {57#(<= 0 (select |#memory_int| ULTIMATE.start_main_p1))} assume !(#memory_int[main_p1] >= 0); {55#false} is VALID [2019-01-18 14:19:13,511 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 14:19:13,511 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 14:19:13,511 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 14:19:13,512 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-18 14:19:13,513 INFO L207 CegarAbsIntRunner]: [0], [6], [11] [2019-01-18 14:19:13,550 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 14:19:13,550 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 14:19:13,634 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 14:19:13,635 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 24 root evaluator evaluations with a maximum evaluation depth of 2. Performed 24 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-18 14:19:13,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 14:19:13,640 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 14:19:13,640 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 14:19:13,640 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 14:19:13,649 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 14:19:13,650 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 14:19:13,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 14:19:13,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 14:19:13,680 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 14:19:13,788 INFO L478 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2019-01-18 14:19:13,847 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 [2019-01-18 14:19:13,857 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-18 14:19:13,865 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 14:19:13,927 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-01-18 14:19:13,927 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:9, output treesize:11 [2019-01-18 14:19:13,930 WARN L384 uantifierElimination]: Trying to double check SDD result, but SMT solver's response was UNKNOWN. [2019-01-18 14:19:13,931 WARN L385 uantifierElimination]: Input elimination task: ∃ [|v_#memory_int_12|, ULTIMATE.start_main_p2]. (= (store (store |v_#memory_int_12| ULTIMATE.start_main_p1 0) ULTIMATE.start_main_p2 0) |#memory_int|) [2019-01-18 14:19:13,931 WARN L386 uantifierElimination]: ElimStorePlain result: ∃ [ULTIMATE.start_main_p2]. (and (= (select |#memory_int| ULTIMATE.start_main_p1) 0) (= 0 (select |#memory_int| ULTIMATE.start_main_p2))) [2019-01-18 14:19:14,116 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 14:19:14,118 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2019-01-18 14:19:14,144 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 14:19:14,189 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 14:19:14,190 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:5 [2019-01-18 14:19:14,197 WARN L384 uantifierElimination]: Trying to double check SDD result, but SMT solver's response was UNKNOWN. [2019-01-18 14:19:14,198 WARN L385 uantifierElimination]: Input elimination task: ∃ [|v_#memory_int_13|]. (let ((.cse0 (select |v_#memory_int_13| ULTIMATE.start_main_p1))) (and (= |#memory_int| (store |v_#memory_int_13| ULTIMATE.start_main_p1 (+ .cse0 1))) (= 0 .cse0))) [2019-01-18 14:19:14,198 WARN L386 uantifierElimination]: ElimStorePlain result: ∃ []. (= (select |#memory_int| ULTIMATE.start_main_p1) 1) [2019-01-18 14:19:14,222 INFO L273 TraceCheckUtils]: 0: Hoare triple {54#true} havoc main_p1, main_p2;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;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_p2 := malloc_ptr;#memory_int := #memory_int[main_p1 := 0];#memory_int := #memory_int[main_p2 := 0]; {56#(= (select |#memory_int| ULTIMATE.start_main_p1) 0)} is VALID [2019-01-18 14:19:14,226 INFO L273 TraceCheckUtils]: 1: Hoare triple {56#(= (select |#memory_int| ULTIMATE.start_main_p1) 0)} #memory_int := #memory_int[main_p1 := #memory_int[main_p1] + 1]; {64#(= (select |#memory_int| ULTIMATE.start_main_p1) 1)} is VALID [2019-01-18 14:19:14,227 INFO L273 TraceCheckUtils]: 2: Hoare triple {64#(= (select |#memory_int| ULTIMATE.start_main_p1) 1)} assume !(#memory_int[main_p1] >= 0); {55#false} is VALID [2019-01-18 14:19:14,228 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 14:19:14,228 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 14:19:14,307 INFO L273 TraceCheckUtils]: 2: Hoare triple {57#(<= 0 (select |#memory_int| ULTIMATE.start_main_p1))} assume !(#memory_int[main_p1] >= 0); {55#false} is VALID [2019-01-18 14:19:14,309 INFO L273 TraceCheckUtils]: 1: Hoare triple {71#(<= 0 (+ (select |#memory_int| ULTIMATE.start_main_p1) 1))} #memory_int := #memory_int[main_p1 := #memory_int[main_p1] + 1]; {57#(<= 0 (select |#memory_int| ULTIMATE.start_main_p1))} is VALID [2019-01-18 14:19:14,310 INFO L273 TraceCheckUtils]: 0: Hoare triple {54#true} havoc main_p1, main_p2;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;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_p2 := malloc_ptr;#memory_int := #memory_int[main_p1 := 0];#memory_int := #memory_int[main_p2 := 0]; {71#(<= 0 (+ (select |#memory_int| ULTIMATE.start_main_p1) 1))} is VALID [2019-01-18 14:19:14,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 14:19:14,330 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-01-18 14:19:14,331 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 4 [2019-01-18 14:19:14,331 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-18 14:19:14,332 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2019-01-18 14:19:14,332 INFO L84 Accepts]: Finished accepts. word is accepted. [2019-01-18 14:19:14,332 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 4 states. [2019-01-18 14:19:14,342 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 3 edges. 3 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2019-01-18 14:19:14,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-01-18 14:19:14,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-01-18 14:19:14,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-01-18 14:19:14,343 INFO L87 Difference]: Start difference. First operand 6 states and 9 transitions. Second operand 4 states. [2019-01-18 14:19:14,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 14:19:14,613 INFO L93 Difference]: Finished difference Result 10 states and 17 transitions. [2019-01-18 14:19:14,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-01-18 14:19:14,614 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2019-01-18 14:19:14,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 14:19:14,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-01-18 14:19:14,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 14 transitions. [2019-01-18 14:19:14,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-01-18 14:19:14,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 14 transitions. [2019-01-18 14:19:14,617 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 4 states and 14 transitions. [2019-01-18 14:19:14,673 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 14 edges. 14 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2019-01-18 14:19:14,674 INFO L225 Difference]: With dead ends: 10 [2019-01-18 14:19:14,674 INFO L226 Difference]: Without dead ends: 9 [2019-01-18 14:19:14,675 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-01-18 14:19:14,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2019-01-18 14:19:14,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 7. [2019-01-18 14:19:14,684 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2019-01-18 14:19:14,684 INFO L82 GeneralOperation]: Start isEquivalent. First operand 9 states. Second operand 7 states. [2019-01-18 14:19:14,684 INFO L74 IsIncluded]: Start isIncluded. First operand 9 states. Second operand 7 states. [2019-01-18 14:19:14,684 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 7 states. [2019-01-18 14:19:14,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 14:19:14,687 INFO L93 Difference]: Finished difference Result 9 states and 16 transitions. [2019-01-18 14:19:14,688 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 16 transitions. [2019-01-18 14:19:14,688 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-01-18 14:19:14,688 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2019-01-18 14:19:14,688 INFO L74 IsIncluded]: Start isIncluded. First operand 7 states. Second operand 9 states. [2019-01-18 14:19:14,689 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 9 states. [2019-01-18 14:19:14,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 14:19:14,690 INFO L93 Difference]: Finished difference Result 9 states and 16 transitions. [2019-01-18 14:19:14,691 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 16 transitions. [2019-01-18 14:19:14,691 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-01-18 14:19:14,691 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2019-01-18 14:19:14,691 INFO L88 GeneralOperation]: Finished isEquivalent. [2019-01-18 14:19:14,691 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2019-01-18 14:19:14,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2019-01-18 14:19:14,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 13 transitions. [2019-01-18 14:19:14,693 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 13 transitions. Word has length 3 [2019-01-18 14:19:14,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 14:19:14,693 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 13 transitions. [2019-01-18 14:19:14,693 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-01-18 14:19:14,693 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 13 transitions. [2019-01-18 14:19:14,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-18 14:19:14,694 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 14:19:14,694 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-18 14:19:14,694 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-01-18 14:19:14,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 14:19:14,695 INFO L82 PathProgramCache]: Analyzing trace with hash 30050, now seen corresponding path program 1 times [2019-01-18 14:19:14,695 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 14:19:14,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 14:19:14,696 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 14:19:14,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 14:19:14,696 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 14:19:14,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 14:19:14,783 INFO L273 TraceCheckUtils]: 0: Hoare triple {116#true} havoc main_p1, main_p2;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;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_p2 := malloc_ptr;#memory_int := #memory_int[main_p1 := 0];#memory_int := #memory_int[main_p2 := 0]; {118#(and (not (= ULTIMATE.start_main_p1 ULTIMATE.start_main_p2)) (= 0 (select (store |#memory_int| ULTIMATE.start_main_p2 (+ (select |#memory_int| ULTIMATE.start_main_p2) (- 1))) ULTIMATE.start_main_p1)))} is VALID [2019-01-18 14:19:14,784 INFO L273 TraceCheckUtils]: 1: Hoare triple {118#(and (not (= ULTIMATE.start_main_p1 ULTIMATE.start_main_p2)) (= 0 (select (store |#memory_int| ULTIMATE.start_main_p2 (+ (select |#memory_int| ULTIMATE.start_main_p2) (- 1))) ULTIMATE.start_main_p1)))} #memory_int := #memory_int[main_p2 := #memory_int[main_p2] - 1]; {119#(= (select |#memory_int| ULTIMATE.start_main_p1) 0)} is VALID [2019-01-18 14:19:14,785 INFO L273 TraceCheckUtils]: 2: Hoare triple {119#(= (select |#memory_int| ULTIMATE.start_main_p1) 0)} assume !(#memory_int[main_p1] >= 0); {117#false} is VALID [2019-01-18 14:19:14,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 14:19:14,785 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 14:19:14,785 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 14:19:14,785 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-18 14:19:14,786 INFO L207 CegarAbsIntRunner]: [0], [8], [11] [2019-01-18 14:19:14,787 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 14:19:14,787 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 14:19:14,800 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 14:19:14,800 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 24 root evaluator evaluations with a maximum evaluation depth of 2. Performed 24 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-18 14:19:14,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 14:19:14,801 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 14:19:14,801 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 14:19:14,801 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 14:19:14,810 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 14:19:14,810 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 14:19:14,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 14:19:14,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 14:19:14,850 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 14:19:14,941 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2019-01-18 14:19:15,011 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 15 [2019-01-18 14:19:15,035 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-18 14:19:15,138 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 14:19:15,247 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2019-01-18 14:19:15,251 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-01-18 14:19:15,261 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 14:19:15,261 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:18, output treesize:15 [2019-01-18 14:19:15,264 WARN L384 uantifierElimination]: Trying to double check SDD result, but SMT solver's response was UNKNOWN. [2019-01-18 14:19:15,265 WARN L385 uantifierElimination]: Input elimination task: ∃ [|v_#memory_int_15|, |v_#valid_4|]. (and (= (select (store |v_#valid_4| ULTIMATE.start_main_p1 1) ULTIMATE.start_main_p2) 0) (= |#memory_int| (store (store |v_#memory_int_15| ULTIMATE.start_main_p1 0) ULTIMATE.start_main_p2 0))) [2019-01-18 14:19:15,265 WARN L386 uantifierElimination]: ElimStorePlain result: ∃ []. (and (= (select |#memory_int| ULTIMATE.start_main_p1) 0) (not (= ULTIMATE.start_main_p2 ULTIMATE.start_main_p1)) (= 0 (select |#memory_int| ULTIMATE.start_main_p2))) [2019-01-18 14:19:15,334 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 14:19:15,336 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2019-01-18 14:19:15,343 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 14:19:15,369 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-01-18 14:19:15,369 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:11 [2019-01-18 14:19:17,417 WARN L384 uantifierElimination]: Trying to double check SDD result, but SMT solver's response was UNKNOWN. [2019-01-18 14:19:17,418 WARN L385 uantifierElimination]: Input elimination task: ∃ [|v_#memory_int_16|, ULTIMATE.start_main_p2]. (let ((.cse0 (select |v_#memory_int_16| ULTIMATE.start_main_p2))) (and (= (store |v_#memory_int_16| ULTIMATE.start_main_p2 (+ .cse0 (- 1))) |#memory_int|) (not (= ULTIMATE.start_main_p2 ULTIMATE.start_main_p1)) (= 0 (select |v_#memory_int_16| ULTIMATE.start_main_p1)) (= .cse0 0))) [2019-01-18 14:19:17,418 WARN L386 uantifierElimination]: ElimStorePlain result: ∃ [ULTIMATE.start_main_p2]. (and (= (- 1) (select |#memory_int| ULTIMATE.start_main_p2)) (= (select |#memory_int| ULTIMATE.start_main_p1) 0)) [2019-01-18 14:19:17,464 INFO L273 TraceCheckUtils]: 0: Hoare triple {116#true} havoc main_p1, main_p2;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;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_p2 := malloc_ptr;#memory_int := #memory_int[main_p1 := 0];#memory_int := #memory_int[main_p2 := 0]; {123#(and (= (select |#memory_int| ULTIMATE.start_main_p1) 0) (not (= ULTIMATE.start_main_p2 ULTIMATE.start_main_p1)) (= 0 (select |#memory_int| ULTIMATE.start_main_p2)))} is VALID [2019-01-18 14:19:17,465 INFO L273 TraceCheckUtils]: 1: Hoare triple {123#(and (= (select |#memory_int| ULTIMATE.start_main_p1) 0) (not (= ULTIMATE.start_main_p2 ULTIMATE.start_main_p1)) (= 0 (select |#memory_int| ULTIMATE.start_main_p2)))} #memory_int := #memory_int[main_p2 := #memory_int[main_p2] - 1]; {127#(and (exists ((ULTIMATE.start_main_p2 Int)) (= 0 (+ (select |#memory_int| ULTIMATE.start_main_p2) 1))) (= (select |#memory_int| ULTIMATE.start_main_p1) 0))} is VALID [2019-01-18 14:19:17,466 INFO L273 TraceCheckUtils]: 2: Hoare triple {127#(and (exists ((ULTIMATE.start_main_p2 Int)) (= 0 (+ (select |#memory_int| ULTIMATE.start_main_p2) 1))) (= (select |#memory_int| ULTIMATE.start_main_p1) 0))} assume !(#memory_int[main_p1] >= 0); {117#false} is VALID [2019-01-18 14:19:17,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 14:19:17,467 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 14:19:17,513 INFO L273 TraceCheckUtils]: 2: Hoare triple {131#(<= 0 (select |#memory_int| ULTIMATE.start_main_p1))} assume !(#memory_int[main_p1] >= 0); {117#false} is VALID [2019-01-18 14:19:17,520 INFO L273 TraceCheckUtils]: 1: Hoare triple {135#(<= 0 (select (store |#memory_int| ULTIMATE.start_main_p2 (+ (select |#memory_int| ULTIMATE.start_main_p2) (- 1))) ULTIMATE.start_main_p1))} #memory_int := #memory_int[main_p2 := #memory_int[main_p2] - 1]; {131#(<= 0 (select |#memory_int| ULTIMATE.start_main_p1))} is VALID [2019-01-18 14:19:17,523 INFO L273 TraceCheckUtils]: 0: Hoare triple {116#true} havoc main_p1, main_p2;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;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_p2 := malloc_ptr;#memory_int := #memory_int[main_p1 := 0];#memory_int := #memory_int[main_p2 := 0]; {135#(<= 0 (select (store |#memory_int| ULTIMATE.start_main_p2 (+ (select |#memory_int| ULTIMATE.start_main_p2) (- 1))) ULTIMATE.start_main_p1))} is VALID [2019-01-18 14:19:17,524 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 14:19:17,542 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 14:19:17,542 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-18 14:19:17,542 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 14:19:17,543 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-18 14:19:17,543 INFO L84 Accepts]: Finished accepts. word is accepted. [2019-01-18 14:19:17,543 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 6 states. [2019-01-18 14:19:17,560 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 6 edges. 6 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2019-01-18 14:19:17,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-18 14:19:17,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-18 14:19:17,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-18 14:19:17,561 INFO L87 Difference]: Start difference. First operand 7 states and 13 transitions. Second operand 6 states. [2019-01-18 14:19:17,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 14:19:17,819 INFO L93 Difference]: Finished difference Result 17 states and 27 transitions. [2019-01-18 14:19:17,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-18 14:19:17,819 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-18 14:19:17,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 14:19:17,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-01-18 14:19:17,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 20 transitions. [2019-01-18 14:19:17,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-01-18 14:19:17,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 20 transitions. [2019-01-18 14:19:17,824 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 5 states and 20 transitions. [2019-01-18 14:19:17,857 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 20 edges. 20 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2019-01-18 14:19:17,859 INFO L225 Difference]: With dead ends: 17 [2019-01-18 14:19:17,859 INFO L226 Difference]: Without dead ends: 14 [2019-01-18 14:19:17,859 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-18 14:19:17,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-01-18 14:19:17,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 10. [2019-01-18 14:19:17,957 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2019-01-18 14:19:17,958 INFO L82 GeneralOperation]: Start isEquivalent. First operand 14 states. Second operand 10 states. [2019-01-18 14:19:17,958 INFO L74 IsIncluded]: Start isIncluded. First operand 14 states. Second operand 10 states. [2019-01-18 14:19:17,958 INFO L87 Difference]: Start difference. First operand 14 states. Second operand 10 states. [2019-01-18 14:19:17,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 14:19:17,960 INFO L93 Difference]: Finished difference Result 14 states and 23 transitions. [2019-01-18 14:19:17,960 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 23 transitions. [2019-01-18 14:19:17,960 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-01-18 14:19:17,961 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2019-01-18 14:19:17,961 INFO L74 IsIncluded]: Start isIncluded. First operand 10 states. Second operand 14 states. [2019-01-18 14:19:17,961 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 14 states. [2019-01-18 14:19:17,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 14:19:17,963 INFO L93 Difference]: Finished difference Result 14 states and 23 transitions. [2019-01-18 14:19:17,963 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 23 transitions. [2019-01-18 14:19:17,963 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-01-18 14:19:17,963 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2019-01-18 14:19:17,964 INFO L88 GeneralOperation]: Finished isEquivalent. [2019-01-18 14:19:17,964 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2019-01-18 14:19:17,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2019-01-18 14:19:17,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 21 transitions. [2019-01-18 14:19:17,965 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 21 transitions. Word has length 3 [2019-01-18 14:19:17,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 14:19:17,966 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 21 transitions. [2019-01-18 14:19:17,966 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-18 14:19:17,966 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 21 transitions. [2019-01-18 14:19:17,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-18 14:19:17,966 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 14:19:17,966 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-18 14:19:17,967 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-01-18 14:19:17,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 14:19:17,967 INFO L82 PathProgramCache]: Analyzing trace with hash 929546, now seen corresponding path program 1 times [2019-01-18 14:19:17,967 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 14:19:17,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 14:19:17,968 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 14:19:17,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 14:19:17,969 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 14:19:17,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 14:19:18,090 INFO L273 TraceCheckUtils]: 0: Hoare triple {207#true} havoc main_p1, main_p2;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;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_p2 := malloc_ptr;#memory_int := #memory_int[main_p1 := 0];#memory_int := #memory_int[main_p2 := 0]; {209#(and (not (= ULTIMATE.start_main_p1 ULTIMATE.start_main_p2)) (= (select |#memory_int| ULTIMATE.start_main_p1) 0))} is VALID [2019-01-18 14:19:18,091 INFO L273 TraceCheckUtils]: 1: Hoare triple {209#(and (not (= ULTIMATE.start_main_p1 ULTIMATE.start_main_p2)) (= (select |#memory_int| ULTIMATE.start_main_p1) 0))} #memory_int := #memory_int[main_p1 := #memory_int[main_p1] + 1]; {210#(and (not (= ULTIMATE.start_main_p1 ULTIMATE.start_main_p2)) (<= 1 (select (store |#memory_int| ULTIMATE.start_main_p2 (+ (select |#memory_int| ULTIMATE.start_main_p2) (- 1))) ULTIMATE.start_main_p1)))} is VALID [2019-01-18 14:19:18,092 INFO L273 TraceCheckUtils]: 2: Hoare triple {210#(and (not (= ULTIMATE.start_main_p1 ULTIMATE.start_main_p2)) (<= 1 (select (store |#memory_int| ULTIMATE.start_main_p2 (+ (select |#memory_int| ULTIMATE.start_main_p2) (- 1))) ULTIMATE.start_main_p1)))} #memory_int := #memory_int[main_p2 := #memory_int[main_p2] - 1]; {211#(<= 1 (select |#memory_int| ULTIMATE.start_main_p1))} is VALID [2019-01-18 14:19:18,093 INFO L273 TraceCheckUtils]: 3: Hoare triple {211#(<= 1 (select |#memory_int| ULTIMATE.start_main_p1))} assume !(#memory_int[main_p1] >= 0); {208#false} is VALID [2019-01-18 14:19:18,093 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 14:19:18,094 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 14:19:18,094 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 14:19:18,094 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-18 14:19:18,095 INFO L207 CegarAbsIntRunner]: [0], [6], [8], [11] [2019-01-18 14:19:18,097 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 14:19:18,097 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 14:19:18,115 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 14:19:18,115 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 26 root evaluator evaluations with a maximum evaluation depth of 2. Performed 26 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-18 14:19:18,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 14:19:18,116 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 14:19:18,116 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 14:19:18,116 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 14:19:18,134 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 14:19:18,134 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 14:19:18,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 14:19:18,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 14:19:18,146 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 14:19:18,206 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2019-01-18 14:19:18,211 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 14:19:18,218 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2019-01-18 14:19:18,230 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 15 [2019-01-18 14:19:18,232 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-01-18 14:19:18,266 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 14:19:18,292 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 14:19:18,293 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:18, output treesize:15 [2019-01-18 14:19:18,298 WARN L384 uantifierElimination]: Trying to double check SDD result, but SMT solver's response was UNKNOWN. [2019-01-18 14:19:18,298 WARN L385 uantifierElimination]: Input elimination task: ∃ [|v_#memory_int_18|, |v_#valid_5|]. (and (= (select (store |v_#valid_5| ULTIMATE.start_main_p1 1) ULTIMATE.start_main_p2) 0) (= (store (store |v_#memory_int_18| ULTIMATE.start_main_p1 0) ULTIMATE.start_main_p2 0) |#memory_int|)) [2019-01-18 14:19:18,298 WARN L386 uantifierElimination]: ElimStorePlain result: ∃ []. (and (= (select |#memory_int| ULTIMATE.start_main_p1) 0) (not (= ULTIMATE.start_main_p2 ULTIMATE.start_main_p1)) (= 0 (select |#memory_int| ULTIMATE.start_main_p2))) [2019-01-18 14:19:18,347 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 14:19:18,349 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2019-01-18 14:19:18,353 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 14:19:18,362 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 14:19:18,363 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:11 [2019-01-18 14:19:18,372 WARN L384 uantifierElimination]: Trying to double check SDD result, but SMT solver's response was UNKNOWN. [2019-01-18 14:19:18,372 WARN L385 uantifierElimination]: Input elimination task: ∃ [|v_#memory_int_19|]. (let ((.cse0 (select |v_#memory_int_19| ULTIMATE.start_main_p1))) (and (not (= ULTIMATE.start_main_p2 ULTIMATE.start_main_p1)) (= (store |v_#memory_int_19| ULTIMATE.start_main_p1 (+ .cse0 1)) |#memory_int|) (= 0 (select |v_#memory_int_19| ULTIMATE.start_main_p2)) (= .cse0 0))) [2019-01-18 14:19:18,372 WARN L386 uantifierElimination]: ElimStorePlain result: ∃ []. (and (= (select |#memory_int| ULTIMATE.start_main_p1) 1) (= 0 (select |#memory_int| ULTIMATE.start_main_p2))) [2019-01-18 14:19:18,408 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 14:19:18,409 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 14:19:18,409 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 14:19:18,410 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 14:19:18,412 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 27 [2019-01-18 14:19:18,415 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 14:19:18,427 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-01-18 14:19:18,427 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:11 [2019-01-18 14:19:20,571 WARN L384 uantifierElimination]: Trying to double check SDD result, but SMT solver's response was UNKNOWN. [2019-01-18 14:19:20,572 WARN L385 uantifierElimination]: Input elimination task: ∃ [|v_#memory_int_20|, ULTIMATE.start_main_p2]. (let ((.cse0 (select |v_#memory_int_20| ULTIMATE.start_main_p2))) (and (= .cse0 0) (= (store |v_#memory_int_20| ULTIMATE.start_main_p2 (+ .cse0 (- 1))) |#memory_int|) (= 1 (select |v_#memory_int_20| ULTIMATE.start_main_p1)))) [2019-01-18 14:19:20,572 WARN L386 uantifierElimination]: ElimStorePlain result: ∃ [ULTIMATE.start_main_p2]. (and (= (select |#memory_int| ULTIMATE.start_main_p1) 1) (= (- 1) (select |#memory_int| ULTIMATE.start_main_p2))) [2019-01-18 14:19:20,631 INFO L273 TraceCheckUtils]: 0: Hoare triple {207#true} havoc main_p1, main_p2;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;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_p2 := malloc_ptr;#memory_int := #memory_int[main_p1 := 0];#memory_int := #memory_int[main_p2 := 0]; {215#(and (= (select |#memory_int| ULTIMATE.start_main_p1) 0) (not (= ULTIMATE.start_main_p2 ULTIMATE.start_main_p1)) (= 0 (select |#memory_int| ULTIMATE.start_main_p2)))} is VALID [2019-01-18 14:19:20,632 INFO L273 TraceCheckUtils]: 1: Hoare triple {215#(and (= (select |#memory_int| ULTIMATE.start_main_p1) 0) (not (= ULTIMATE.start_main_p2 ULTIMATE.start_main_p1)) (= 0 (select |#memory_int| ULTIMATE.start_main_p2)))} #memory_int := #memory_int[main_p1 := #memory_int[main_p1] + 1]; {219#(and (= (select |#memory_int| ULTIMATE.start_main_p1) 1) (= 0 (select |#memory_int| ULTIMATE.start_main_p2)))} is VALID [2019-01-18 14:19:20,634 INFO L273 TraceCheckUtils]: 2: Hoare triple {219#(and (= (select |#memory_int| ULTIMATE.start_main_p1) 1) (= 0 (select |#memory_int| ULTIMATE.start_main_p2)))} #memory_int := #memory_int[main_p2 := #memory_int[main_p2] - 1]; {223#(and (= (select |#memory_int| ULTIMATE.start_main_p1) 1) (exists ((ULTIMATE.start_main_p2 Int)) (= 0 (+ (select |#memory_int| ULTIMATE.start_main_p2) 1))))} is VALID [2019-01-18 14:19:20,634 INFO L273 TraceCheckUtils]: 3: Hoare triple {223#(and (= (select |#memory_int| ULTIMATE.start_main_p1) 1) (exists ((ULTIMATE.start_main_p2 Int)) (= 0 (+ (select |#memory_int| ULTIMATE.start_main_p2) 1))))} assume !(#memory_int[main_p1] >= 0); {208#false} is VALID [2019-01-18 14:19:20,635 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 14:19:20,635 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 14:19:20,684 INFO L273 TraceCheckUtils]: 3: Hoare triple {227#(<= 0 (select |#memory_int| ULTIMATE.start_main_p1))} assume !(#memory_int[main_p1] >= 0); {208#false} is VALID [2019-01-18 14:19:20,686 INFO L273 TraceCheckUtils]: 2: Hoare triple {231#(<= 0 (select (store |#memory_int| ULTIMATE.start_main_p2 (+ (select |#memory_int| ULTIMATE.start_main_p2) (- 1))) ULTIMATE.start_main_p1))} #memory_int := #memory_int[main_p2 := #memory_int[main_p2] - 1]; {227#(<= 0 (select |#memory_int| ULTIMATE.start_main_p1))} is VALID [2019-01-18 14:19:20,687 INFO L273 TraceCheckUtils]: 1: Hoare triple {235#(<= 0 (select (store (store |#memory_int| ULTIMATE.start_main_p1 (+ (select |#memory_int| ULTIMATE.start_main_p1) 1)) ULTIMATE.start_main_p2 (+ (select (store |#memory_int| ULTIMATE.start_main_p1 (+ (select |#memory_int| ULTIMATE.start_main_p1) 1)) ULTIMATE.start_main_p2) (- 1))) ULTIMATE.start_main_p1))} #memory_int := #memory_int[main_p1 := #memory_int[main_p1] + 1]; {231#(<= 0 (select (store |#memory_int| ULTIMATE.start_main_p2 (+ (select |#memory_int| ULTIMATE.start_main_p2) (- 1))) ULTIMATE.start_main_p1))} is VALID [2019-01-18 14:19:20,689 INFO L273 TraceCheckUtils]: 0: Hoare triple {207#true} havoc main_p1, main_p2;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;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_p2 := malloc_ptr;#memory_int := #memory_int[main_p1 := 0];#memory_int := #memory_int[main_p2 := 0]; {235#(<= 0 (select (store (store |#memory_int| ULTIMATE.start_main_p1 (+ (select |#memory_int| ULTIMATE.start_main_p1) 1)) ULTIMATE.start_main_p2 (+ (select (store |#memory_int| ULTIMATE.start_main_p1 (+ (select |#memory_int| ULTIMATE.start_main_p1) 1)) ULTIMATE.start_main_p2) (- 1))) ULTIMATE.start_main_p1))} is VALID [2019-01-18 14:19:20,689 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 14:19:20,708 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 14:19:20,708 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-18 14:19:20,709 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 14:19:20,709 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-18 14:19:20,709 INFO L84 Accepts]: Finished accepts. word is accepted. [2019-01-18 14:19:20,709 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 8 states. [2019-01-18 14:19:20,720 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 8 edges. 8 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2019-01-18 14:19:20,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 14:19:20,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 14:19:20,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2019-01-18 14:19:20,721 INFO L87 Difference]: Start difference. First operand 10 states and 21 transitions. Second operand 8 states. [2019-01-18 14:19:20,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 14:19:20,982 INFO L93 Difference]: Finished difference Result 18 states and 31 transitions. [2019-01-18 14:19:20,982 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-18 14:19:20,982 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-18 14:19:20,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 14:19:20,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-01-18 14:19:20,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 21 transitions. [2019-01-18 14:19:20,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-01-18 14:19:20,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 21 transitions. [2019-01-18 14:19:20,985 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 7 states and 21 transitions. [2019-01-18 14:19:21,023 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 21 edges. 21 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2019-01-18 14:19:21,025 INFO L225 Difference]: With dead ends: 18 [2019-01-18 14:19:21,025 INFO L226 Difference]: Without dead ends: 15 [2019-01-18 14:19:21,025 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2019-01-18 14:19:21,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-01-18 14:19:21,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 6. [2019-01-18 14:19:21,046 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2019-01-18 14:19:21,046 INFO L82 GeneralOperation]: Start isEquivalent. First operand 15 states. Second operand 6 states. [2019-01-18 14:19:21,046 INFO L74 IsIncluded]: Start isIncluded. First operand 15 states. Second operand 6 states. [2019-01-18 14:19:21,046 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 6 states. [2019-01-18 14:19:21,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 14:19:21,048 INFO L93 Difference]: Finished difference Result 15 states and 26 transitions. [2019-01-18 14:19:21,048 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 26 transitions. [2019-01-18 14:19:21,049 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-01-18 14:19:21,049 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2019-01-18 14:19:21,049 INFO L74 IsIncluded]: Start isIncluded. First operand 6 states. Second operand 15 states. [2019-01-18 14:19:21,049 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 15 states. [2019-01-18 14:19:21,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 14:19:21,051 INFO L93 Difference]: Finished difference Result 15 states and 26 transitions. [2019-01-18 14:19:21,051 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 26 transitions. [2019-01-18 14:19:21,051 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-01-18 14:19:21,052 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2019-01-18 14:19:21,052 INFO L88 GeneralOperation]: Finished isEquivalent. [2019-01-18 14:19:21,052 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2019-01-18 14:19:21,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-01-18 14:19:21,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 9 transitions. [2019-01-18 14:19:21,053 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 9 transitions. Word has length 4 [2019-01-18 14:19:21,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 14:19:21,053 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 9 transitions. [2019-01-18 14:19:21,053 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-18 14:19:21,054 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 9 transitions. [2019-01-18 14:19:21,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-18 14:19:21,054 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 14:19:21,054 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-18 14:19:21,054 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-01-18 14:19:21,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 14:19:21,055 INFO L82 PathProgramCache]: Analyzing trace with hash 931594, now seen corresponding path program 1 times [2019-01-18 14:19:21,055 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 14:19:21,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 14:19:21,056 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 14:19:21,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 14:19:21,056 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 14:19:21,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 14:19:21,108 INFO L273 TraceCheckUtils]: 0: Hoare triple {305#true} havoc main_p1, main_p2;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;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_p2 := malloc_ptr;#memory_int := #memory_int[main_p1 := 0];#memory_int := #memory_int[main_p2 := 0]; {307#(= (select |#memory_int| ULTIMATE.start_main_p2) 0)} is VALID [2019-01-18 14:19:21,109 INFO L273 TraceCheckUtils]: 1: Hoare triple {307#(= (select |#memory_int| ULTIMATE.start_main_p2) 0)} #memory_int := #memory_int[main_p2 := #memory_int[main_p2] - 1]; {308#(<= (+ (select |#memory_int| ULTIMATE.start_main_p2) 1) 0)} is VALID [2019-01-18 14:19:21,111 INFO L273 TraceCheckUtils]: 2: Hoare triple {308#(<= (+ (select |#memory_int| ULTIMATE.start_main_p2) 1) 0)} assume #memory_int[main_p1] >= 0; {308#(<= (+ (select |#memory_int| ULTIMATE.start_main_p2) 1) 0)} is VALID [2019-01-18 14:19:21,112 INFO L273 TraceCheckUtils]: 3: Hoare triple {308#(<= (+ (select |#memory_int| ULTIMATE.start_main_p2) 1) 0)} assume !(#memory_int[main_p2] <= 0); {306#false} is VALID [2019-01-18 14:19:21,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 14:19:21,113 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 14:19:21,113 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 14:19:21,113 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-18 14:19:21,114 INFO L207 CegarAbsIntRunner]: [0], [8], [12], [13] [2019-01-18 14:19:21,117 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 14:19:21,117 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 14:19:21,137 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 14:19:21,137 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 26 root evaluator evaluations with a maximum evaluation depth of 2. Performed 26 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-18 14:19:21,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 14:19:21,138 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 14:19:21,138 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 14:19:21,138 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 14:19:21,147 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 14:19:21,147 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 14:19:21,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 14:19:21,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 14:19:21,156 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 14:19:21,167 INFO L478 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2019-01-18 14:19:21,180 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 [2019-01-18 14:19:21,185 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-18 14:19:21,193 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 14:19:21,198 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-01-18 14:19:21,199 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:9, output treesize:11 [2019-01-18 14:19:21,202 WARN L384 uantifierElimination]: Trying to double check SDD result, but SMT solver's response was UNKNOWN. [2019-01-18 14:19:21,202 WARN L385 uantifierElimination]: Input elimination task: ∃ [|v_#memory_int_23|, ULTIMATE.start_main_p1]. (= (store (store |v_#memory_int_23| ULTIMATE.start_main_p1 0) ULTIMATE.start_main_p2 0) |#memory_int|) [2019-01-18 14:19:21,203 WARN L386 uantifierElimination]: ElimStorePlain result: ∃ [ULTIMATE.start_main_p1]. (and (= (select |#memory_int| ULTIMATE.start_main_p1) 0) (= 0 (select |#memory_int| ULTIMATE.start_main_p2))) [2019-01-18 14:19:21,222 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 14:19:21,223 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2019-01-18 14:19:21,224 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 14:19:21,226 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 14:19:21,226 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:5 [2019-01-18 14:19:21,235 WARN L384 uantifierElimination]: Trying to double check SDD result, but SMT solver's response was UNKNOWN. [2019-01-18 14:19:21,236 WARN L385 uantifierElimination]: Input elimination task: ∃ [|v_#memory_int_24|]. (let ((.cse0 (select |v_#memory_int_24| ULTIMATE.start_main_p2))) (and (= 0 .cse0) (= |#memory_int| (store |v_#memory_int_24| ULTIMATE.start_main_p2 (+ .cse0 (- 1)))))) [2019-01-18 14:19:21,236 WARN L386 uantifierElimination]: ElimStorePlain result: ∃ []. (= (- 1) (select |#memory_int| ULTIMATE.start_main_p2)) [2019-01-18 14:19:21,246 INFO L273 TraceCheckUtils]: 0: Hoare triple {305#true} havoc main_p1, main_p2;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;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_p2 := malloc_ptr;#memory_int := #memory_int[main_p1 := 0];#memory_int := #memory_int[main_p2 := 0]; {307#(= (select |#memory_int| ULTIMATE.start_main_p2) 0)} is VALID [2019-01-18 14:19:21,248 INFO L273 TraceCheckUtils]: 1: Hoare triple {307#(= (select |#memory_int| ULTIMATE.start_main_p2) 0)} #memory_int := #memory_int[main_p2 := #memory_int[main_p2] - 1]; {315#(= 0 (+ (select |#memory_int| ULTIMATE.start_main_p2) 1))} is VALID [2019-01-18 14:19:21,249 INFO L273 TraceCheckUtils]: 2: Hoare triple {315#(= 0 (+ (select |#memory_int| ULTIMATE.start_main_p2) 1))} assume #memory_int[main_p1] >= 0; {315#(= 0 (+ (select |#memory_int| ULTIMATE.start_main_p2) 1))} is VALID [2019-01-18 14:19:21,250 INFO L273 TraceCheckUtils]: 3: Hoare triple {315#(= 0 (+ (select |#memory_int| ULTIMATE.start_main_p2) 1))} assume !(#memory_int[main_p2] <= 0); {306#false} is VALID [2019-01-18 14:19:21,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 14:19:21,250 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 14:19:21,281 INFO L273 TraceCheckUtils]: 3: Hoare triple {322#(<= (select |#memory_int| ULTIMATE.start_main_p2) 0)} assume !(#memory_int[main_p2] <= 0); {306#false} is VALID [2019-01-18 14:19:21,281 INFO L273 TraceCheckUtils]: 2: Hoare triple {322#(<= (select |#memory_int| ULTIMATE.start_main_p2) 0)} assume #memory_int[main_p1] >= 0; {322#(<= (select |#memory_int| ULTIMATE.start_main_p2) 0)} is VALID [2019-01-18 14:19:21,282 INFO L273 TraceCheckUtils]: 1: Hoare triple {329#(<= (select |#memory_int| ULTIMATE.start_main_p2) 1)} #memory_int := #memory_int[main_p2 := #memory_int[main_p2] - 1]; {322#(<= (select |#memory_int| ULTIMATE.start_main_p2) 0)} is VALID [2019-01-18 14:19:21,284 INFO L273 TraceCheckUtils]: 0: Hoare triple {305#true} havoc main_p1, main_p2;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;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_p2 := malloc_ptr;#memory_int := #memory_int[main_p1 := 0];#memory_int := #memory_int[main_p2 := 0]; {329#(<= (select |#memory_int| ULTIMATE.start_main_p2) 1)} is VALID [2019-01-18 14:19:21,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 14:19:21,304 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-01-18 14:19:21,304 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 5 [2019-01-18 14:19:21,304 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-18 14:19:21,304 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2019-01-18 14:19:21,304 INFO L84 Accepts]: Finished accepts. word is accepted. [2019-01-18 14:19:21,305 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 4 states. [2019-01-18 14:19:21,309 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 4 edges. 4 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2019-01-18 14:19:21,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-01-18 14:19:21,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-01-18 14:19:21,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-01-18 14:19:21,310 INFO L87 Difference]: Start difference. First operand 6 states and 9 transitions. Second operand 4 states. [2019-01-18 14:19:21,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 14:19:21,411 INFO L93 Difference]: Finished difference Result 12 states and 17 transitions. [2019-01-18 14:19:21,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-01-18 14:19:21,411 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2019-01-18 14:19:21,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 14:19:21,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-01-18 14:19:21,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 13 transitions. [2019-01-18 14:19:21,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-01-18 14:19:21,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 13 transitions. [2019-01-18 14:19:21,414 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 4 states and 13 transitions. [2019-01-18 14:19:21,435 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 13 edges. 13 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2019-01-18 14:19:21,436 INFO L225 Difference]: With dead ends: 12 [2019-01-18 14:19:21,436 INFO L226 Difference]: Without dead ends: 10 [2019-01-18 14:19:21,437 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-01-18 14:19:21,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2019-01-18 14:19:21,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 8. [2019-01-18 14:19:21,479 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2019-01-18 14:19:21,479 INFO L82 GeneralOperation]: Start isEquivalent. First operand 10 states. Second operand 8 states. [2019-01-18 14:19:21,479 INFO L74 IsIncluded]: Start isIncluded. First operand 10 states. Second operand 8 states. [2019-01-18 14:19:21,480 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 8 states. [2019-01-18 14:19:21,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 14:19:21,481 INFO L93 Difference]: Finished difference Result 10 states and 15 transitions. [2019-01-18 14:19:21,481 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 15 transitions. [2019-01-18 14:19:21,481 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-01-18 14:19:21,482 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2019-01-18 14:19:21,482 INFO L74 IsIncluded]: Start isIncluded. First operand 8 states. Second operand 10 states. [2019-01-18 14:19:21,482 INFO L87 Difference]: Start difference. First operand 8 states. Second operand 10 states. [2019-01-18 14:19:21,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 14:19:21,483 INFO L93 Difference]: Finished difference Result 10 states and 15 transitions. [2019-01-18 14:19:21,483 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 15 transitions. [2019-01-18 14:19:21,484 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-01-18 14:19:21,484 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2019-01-18 14:19:21,484 INFO L88 GeneralOperation]: Finished isEquivalent. [2019-01-18 14:19:21,484 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2019-01-18 14:19:21,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-01-18 14:19:21,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 14 transitions. [2019-01-18 14:19:21,485 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 14 transitions. Word has length 4 [2019-01-18 14:19:21,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 14:19:21,486 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 14 transitions. [2019-01-18 14:19:21,486 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-01-18 14:19:21,486 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 14 transitions. [2019-01-18 14:19:21,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-18 14:19:21,486 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 14:19:21,487 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2019-01-18 14:19:21,487 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-01-18 14:19:21,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 14:19:21,487 INFO L82 PathProgramCache]: Analyzing trace with hash 28814048, now seen corresponding path program 1 times [2019-01-18 14:19:21,487 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 14:19:21,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 14:19:21,488 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 14:19:21,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 14:19:21,489 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 14:19:21,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 14:19:21,564 INFO L273 TraceCheckUtils]: 0: Hoare triple {382#true} havoc main_p1, main_p2;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;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_p2 := malloc_ptr;#memory_int := #memory_int[main_p1 := 0];#memory_int := #memory_int[main_p2 := 0]; {384#(and (not (= ULTIMATE.start_main_p1 ULTIMATE.start_main_p2)) (= 0 (select (store |#memory_int| ULTIMATE.start_main_p1 (+ (select |#memory_int| ULTIMATE.start_main_p1) 1)) ULTIMATE.start_main_p2)))} is VALID [2019-01-18 14:19:21,565 INFO L273 TraceCheckUtils]: 1: Hoare triple {384#(and (not (= ULTIMATE.start_main_p1 ULTIMATE.start_main_p2)) (= 0 (select (store |#memory_int| ULTIMATE.start_main_p1 (+ (select |#memory_int| ULTIMATE.start_main_p1) 1)) ULTIMATE.start_main_p2)))} #memory_int := #memory_int[main_p1 := #memory_int[main_p1] + 1]; {384#(and (not (= ULTIMATE.start_main_p1 ULTIMATE.start_main_p2)) (= 0 (select (store |#memory_int| ULTIMATE.start_main_p1 (+ (select |#memory_int| ULTIMATE.start_main_p1) 1)) ULTIMATE.start_main_p2)))} is VALID [2019-01-18 14:19:21,566 INFO L273 TraceCheckUtils]: 2: Hoare triple {384#(and (not (= ULTIMATE.start_main_p1 ULTIMATE.start_main_p2)) (= 0 (select (store |#memory_int| ULTIMATE.start_main_p1 (+ (select |#memory_int| ULTIMATE.start_main_p1) 1)) ULTIMATE.start_main_p2)))} #memory_int := #memory_int[main_p1 := #memory_int[main_p1] + 1]; {384#(and (not (= ULTIMATE.start_main_p1 ULTIMATE.start_main_p2)) (= 0 (select (store |#memory_int| ULTIMATE.start_main_p1 (+ (select |#memory_int| ULTIMATE.start_main_p1) 1)) ULTIMATE.start_main_p2)))} is VALID [2019-01-18 14:19:21,568 INFO L273 TraceCheckUtils]: 3: Hoare triple {384#(and (not (= ULTIMATE.start_main_p1 ULTIMATE.start_main_p2)) (= 0 (select (store |#memory_int| ULTIMATE.start_main_p1 (+ (select |#memory_int| ULTIMATE.start_main_p1) 1)) ULTIMATE.start_main_p2)))} assume #memory_int[main_p1] >= 0; {385#(= (select |#memory_int| ULTIMATE.start_main_p2) 0)} is VALID [2019-01-18 14:19:21,568 INFO L273 TraceCheckUtils]: 4: Hoare triple {385#(= (select |#memory_int| ULTIMATE.start_main_p2) 0)} assume !(#memory_int[main_p2] <= 0); {383#false} is VALID [2019-01-18 14:19:21,569 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-01-18 14:19:21,569 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-18 14:19:21,570 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-01-18 14:19:21,570 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-18 14:19:21,570 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2019-01-18 14:19:21,571 INFO L84 Accepts]: Finished accepts. word is accepted. [2019-01-18 14:19:21,571 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 4 states. [2019-01-18 14:19:21,576 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 4 edges. 4 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2019-01-18 14:19:21,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-01-18 14:19:21,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-01-18 14:19:21,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-01-18 14:19:21,577 INFO L87 Difference]: Start difference. First operand 8 states and 14 transitions. Second operand 4 states. [2019-01-18 14:19:21,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 14:19:21,669 INFO L93 Difference]: Finished difference Result 11 states and 18 transitions. [2019-01-18 14:19:21,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-18 14:19:21,669 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2019-01-18 14:19:21,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 14:19:21,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-01-18 14:19:21,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 9 transitions. [2019-01-18 14:19:21,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-01-18 14:19:21,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 9 transitions. [2019-01-18 14:19:21,671 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 3 states and 9 transitions. [2019-01-18 14:19:21,718 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 9 edges. 9 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2019-01-18 14:19:21,719 INFO L225 Difference]: With dead ends: 11 [2019-01-18 14:19:21,719 INFO L226 Difference]: Without dead ends: 9 [2019-01-18 14:19:21,720 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-01-18 14:19:21,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2019-01-18 14:19:21,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2019-01-18 14:19:21,756 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2019-01-18 14:19:21,756 INFO L82 GeneralOperation]: Start isEquivalent. First operand 9 states. Second operand 9 states. [2019-01-18 14:19:21,757 INFO L74 IsIncluded]: Start isIncluded. First operand 9 states. Second operand 9 states. [2019-01-18 14:19:21,757 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 9 states. [2019-01-18 14:19:21,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 14:19:21,758 INFO L93 Difference]: Finished difference Result 9 states and 16 transitions. [2019-01-18 14:19:21,759 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 16 transitions. [2019-01-18 14:19:21,759 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-01-18 14:19:21,759 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2019-01-18 14:19:21,759 INFO L74 IsIncluded]: Start isIncluded. First operand 9 states. Second operand 9 states. [2019-01-18 14:19:21,759 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 9 states. [2019-01-18 14:19:21,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 14:19:21,760 INFO L93 Difference]: Finished difference Result 9 states and 16 transitions. [2019-01-18 14:19:21,760 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 16 transitions. [2019-01-18 14:19:21,760 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-01-18 14:19:21,761 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2019-01-18 14:19:21,761 INFO L88 GeneralOperation]: Finished isEquivalent. [2019-01-18 14:19:21,761 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2019-01-18 14:19:21,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-01-18 14:19:21,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 16 transitions. [2019-01-18 14:19:21,762 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 16 transitions. Word has length 5 [2019-01-18 14:19:21,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 14:19:21,762 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 16 transitions. [2019-01-18 14:19:21,762 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-01-18 14:19:21,762 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 16 transitions. [2019-01-18 14:19:21,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-18 14:19:21,762 INFO L394 BasicCegarLoop]: Found error trace [2019-01-18 14:19:21,762 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-18 14:19:21,763 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-01-18 14:19:21,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 14:19:21,763 INFO L82 PathProgramCache]: Analyzing trace with hash 28873630, now seen corresponding path program 1 times [2019-01-18 14:19:21,763 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-18 14:19:21,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 14:19:21,764 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 14:19:21,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-18 14:19:21,764 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-18 14:19:21,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 14:19:21,919 INFO L273 TraceCheckUtils]: 0: Hoare triple {438#true} havoc main_p1, main_p2;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;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_p2 := malloc_ptr;#memory_int := #memory_int[main_p1 := 0];#memory_int := #memory_int[main_p2 := 0]; {440#(and (not (= ULTIMATE.start_main_p1 ULTIMATE.start_main_p2)) (= (select |#memory_int| ULTIMATE.start_main_p2) 0))} is VALID [2019-01-18 14:19:21,921 INFO L273 TraceCheckUtils]: 1: Hoare triple {440#(and (not (= ULTIMATE.start_main_p1 ULTIMATE.start_main_p2)) (= (select |#memory_int| ULTIMATE.start_main_p2) 0))} #memory_int := #memory_int[main_p2 := #memory_int[main_p2] - 1]; {441#(and (not (= ULTIMATE.start_main_p1 ULTIMATE.start_main_p2)) (<= (+ (select (store |#memory_int| ULTIMATE.start_main_p1 (+ (select |#memory_int| ULTIMATE.start_main_p1) 1)) ULTIMATE.start_main_p2) 1) 0))} is VALID [2019-01-18 14:19:21,921 INFO L273 TraceCheckUtils]: 2: Hoare triple {441#(and (not (= ULTIMATE.start_main_p1 ULTIMATE.start_main_p2)) (<= (+ (select (store |#memory_int| ULTIMATE.start_main_p1 (+ (select |#memory_int| ULTIMATE.start_main_p1) 1)) ULTIMATE.start_main_p2) 1) 0))} #memory_int := #memory_int[main_p1 := #memory_int[main_p1] + 1]; {442#(<= (+ (select |#memory_int| ULTIMATE.start_main_p2) 1) 0)} is VALID [2019-01-18 14:19:21,928 INFO L273 TraceCheckUtils]: 3: Hoare triple {442#(<= (+ (select |#memory_int| ULTIMATE.start_main_p2) 1) 0)} assume #memory_int[main_p1] >= 0; {442#(<= (+ (select |#memory_int| ULTIMATE.start_main_p2) 1) 0)} is VALID [2019-01-18 14:19:21,930 INFO L273 TraceCheckUtils]: 4: Hoare triple {442#(<= (+ (select |#memory_int| ULTIMATE.start_main_p2) 1) 0)} assume !(#memory_int[main_p2] <= 0); {439#false} is VALID [2019-01-18 14:19:21,930 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 14:19:21,930 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 14:19:21,931 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-18 14:19:21,931 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-18 14:19:21,931 INFO L207 CegarAbsIntRunner]: [0], [6], [8], [12], [13] [2019-01-18 14:19:21,932 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-18 14:19:21,932 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-18 14:19:21,948 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-18 14:19:21,948 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 28 root evaluator evaluations with a maximum evaluation depth of 2. Performed 28 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-18 14:19:21,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-18 14:19:21,948 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-18 14:19:21,948 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-18 14:19:21,949 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-18 14:19:21,957 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-18 14:19:21,957 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-18 14:19:21,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 14:19:21,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-18 14:19:21,964 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-18 14:19:22,009 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2019-01-18 14:19:22,010 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 14:19:22,025 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2019-01-18 14:19:22,032 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 15 [2019-01-18 14:19:22,034 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-01-18 14:19:22,045 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 14:19:22,055 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 14:19:22,055 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:18, output treesize:15 [2019-01-18 14:19:22,058 WARN L384 uantifierElimination]: Trying to double check SDD result, but SMT solver's response was UNKNOWN. [2019-01-18 14:19:22,059 WARN L385 uantifierElimination]: Input elimination task: ∃ [|v_#memory_int_26|, |v_#valid_6|]. (and (= |#memory_int| (store (store |v_#memory_int_26| ULTIMATE.start_main_p1 0) ULTIMATE.start_main_p2 0)) (= 0 (select (store |v_#valid_6| ULTIMATE.start_main_p1 1) ULTIMATE.start_main_p2))) [2019-01-18 14:19:22,059 WARN L386 uantifierElimination]: ElimStorePlain result: ∃ []. (and (= (select |#memory_int| ULTIMATE.start_main_p1) 0) (not (= ULTIMATE.start_main_p2 ULTIMATE.start_main_p1)) (= 0 (select |#memory_int| ULTIMATE.start_main_p2))) [2019-01-18 14:19:22,111 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 14:19:22,112 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2019-01-18 14:19:22,116 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 14:19:22,129 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-18 14:19:22,129 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:11 [2019-01-18 14:19:22,139 WARN L384 uantifierElimination]: Trying to double check SDD result, but SMT solver's response was UNKNOWN. [2019-01-18 14:19:22,140 WARN L385 uantifierElimination]: Input elimination task: ∃ [|v_#memory_int_27|]. (let ((.cse0 (select |v_#memory_int_27| ULTIMATE.start_main_p2))) (and (= 0 .cse0) (not (= ULTIMATE.start_main_p2 ULTIMATE.start_main_p1)) (= (store |v_#memory_int_27| ULTIMATE.start_main_p2 (+ .cse0 (- 1))) |#memory_int|) (= (select |v_#memory_int_27| ULTIMATE.start_main_p1) 0))) [2019-01-18 14:19:22,140 WARN L386 uantifierElimination]: ElimStorePlain result: ∃ []. (and (= (select |#memory_int| ULTIMATE.start_main_p1) 0) (= (- 1) (select |#memory_int| ULTIMATE.start_main_p2))) [2019-01-18 14:19:22,182 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 14:19:22,184 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 14:19:22,186 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 14:19:22,188 INFO L701 Elim1Store]: detected not equals via solver [2019-01-18 14:19:22,190 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 29 [2019-01-18 14:19:22,192 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-18 14:19:22,220 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-01-18 14:19:22,220 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:13 [2019-01-18 14:19:24,232 WARN L384 uantifierElimination]: Trying to double check SDD result, but SMT solver's response was UNKNOWN. [2019-01-18 14:19:24,233 WARN L385 uantifierElimination]: Input elimination task: ∃ [|v_#memory_int_28|, ULTIMATE.start_main_p1]. (let ((.cse0 (select |v_#memory_int_28| ULTIMATE.start_main_p1))) (and (= (store |v_#memory_int_28| ULTIMATE.start_main_p1 (+ .cse0 1)) |#memory_int|) (= .cse0 0) (= 0 (+ (select |v_#memory_int_28| ULTIMATE.start_main_p2) 1)))) [2019-01-18 14:19:24,233 WARN L386 uantifierElimination]: ElimStorePlain result: ∃ [ULTIMATE.start_main_p1]. (and (= (select |#memory_int| ULTIMATE.start_main_p1) 1) (= (+ (select |#memory_int| ULTIMATE.start_main_p2) 1) 0)) [2019-01-18 14:19:24,304 INFO L273 TraceCheckUtils]: 0: Hoare triple {438#true} havoc main_p1, main_p2;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;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_p2 := malloc_ptr;#memory_int := #memory_int[main_p1 := 0];#memory_int := #memory_int[main_p2 := 0]; {446#(and (= (select |#memory_int| ULTIMATE.start_main_p1) 0) (not (= ULTIMATE.start_main_p2 ULTIMATE.start_main_p1)) (= 0 (select |#memory_int| ULTIMATE.start_main_p2)))} is VALID [2019-01-18 14:19:24,319 INFO L273 TraceCheckUtils]: 1: Hoare triple {446#(and (= (select |#memory_int| ULTIMATE.start_main_p1) 0) (not (= ULTIMATE.start_main_p2 ULTIMATE.start_main_p1)) (= 0 (select |#memory_int| ULTIMATE.start_main_p2)))} #memory_int := #memory_int[main_p2 := #memory_int[main_p2] - 1]; {450#(and (= (select |#memory_int| ULTIMATE.start_main_p1) 0) (= 0 (+ (select |#memory_int| ULTIMATE.start_main_p2) 1)))} is VALID [2019-01-18 14:19:24,328 INFO L273 TraceCheckUtils]: 2: Hoare triple {450#(and (= (select |#memory_int| ULTIMATE.start_main_p1) 0) (= 0 (+ (select |#memory_int| ULTIMATE.start_main_p2) 1)))} #memory_int := #memory_int[main_p1 := #memory_int[main_p1] + 1]; {454#(and (exists ((ULTIMATE.start_main_p1 Int)) (= (select |#memory_int| ULTIMATE.start_main_p1) 1)) (= (+ (select |#memory_int| ULTIMATE.start_main_p2) 1) 0))} is VALID [2019-01-18 14:19:24,343 INFO L273 TraceCheckUtils]: 3: Hoare triple {454#(and (exists ((ULTIMATE.start_main_p1 Int)) (= (select |#memory_int| ULTIMATE.start_main_p1) 1)) (= (+ (select |#memory_int| ULTIMATE.start_main_p2) 1) 0))} assume #memory_int[main_p1] >= 0; {454#(and (exists ((ULTIMATE.start_main_p1 Int)) (= (select |#memory_int| ULTIMATE.start_main_p1) 1)) (= (+ (select |#memory_int| ULTIMATE.start_main_p2) 1) 0))} is VALID [2019-01-18 14:19:24,348 INFO L273 TraceCheckUtils]: 4: Hoare triple {454#(and (exists ((ULTIMATE.start_main_p1 Int)) (= (select |#memory_int| ULTIMATE.start_main_p1) 1)) (= (+ (select |#memory_int| ULTIMATE.start_main_p2) 1) 0))} assume !(#memory_int[main_p2] <= 0); {439#false} is VALID [2019-01-18 14:19:24,348 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 14:19:24,348 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-18 14:19:24,415 INFO L273 TraceCheckUtils]: 4: Hoare triple {461#(<= (select |#memory_int| ULTIMATE.start_main_p2) 0)} assume !(#memory_int[main_p2] <= 0); {439#false} is VALID [2019-01-18 14:19:24,416 INFO L273 TraceCheckUtils]: 3: Hoare triple {461#(<= (select |#memory_int| ULTIMATE.start_main_p2) 0)} assume #memory_int[main_p1] >= 0; {461#(<= (select |#memory_int| ULTIMATE.start_main_p2) 0)} is VALID [2019-01-18 14:19:24,417 INFO L273 TraceCheckUtils]: 2: Hoare triple {468#(<= (select (store |#memory_int| ULTIMATE.start_main_p1 (+ (select |#memory_int| ULTIMATE.start_main_p1) 1)) ULTIMATE.start_main_p2) 0)} #memory_int := #memory_int[main_p1 := #memory_int[main_p1] + 1]; {461#(<= (select |#memory_int| ULTIMATE.start_main_p2) 0)} is VALID [2019-01-18 14:19:24,419 INFO L273 TraceCheckUtils]: 1: Hoare triple {472#(<= (select (store (store |#memory_int| ULTIMATE.start_main_p2 (+ (select |#memory_int| ULTIMATE.start_main_p2) (- 1))) ULTIMATE.start_main_p1 (+ (select (store |#memory_int| ULTIMATE.start_main_p2 (+ (select |#memory_int| ULTIMATE.start_main_p2) (- 1))) ULTIMATE.start_main_p1) 1)) ULTIMATE.start_main_p2) 0)} #memory_int := #memory_int[main_p2 := #memory_int[main_p2] - 1]; {468#(<= (select (store |#memory_int| ULTIMATE.start_main_p1 (+ (select |#memory_int| ULTIMATE.start_main_p1) 1)) ULTIMATE.start_main_p2) 0)} is VALID [2019-01-18 14:19:24,422 INFO L273 TraceCheckUtils]: 0: Hoare triple {438#true} havoc main_p1, main_p2;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;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_p2 := malloc_ptr;#memory_int := #memory_int[main_p1 := 0];#memory_int := #memory_int[main_p2 := 0]; {472#(<= (select (store (store |#memory_int| ULTIMATE.start_main_p2 (+ (select |#memory_int| ULTIMATE.start_main_p2) (- 1))) ULTIMATE.start_main_p1 (+ (select (store |#memory_int| ULTIMATE.start_main_p2 (+ (select |#memory_int| ULTIMATE.start_main_p2) (- 1))) ULTIMATE.start_main_p1) 1)) ULTIMATE.start_main_p2) 0)} is VALID [2019-01-18 14:19:24,423 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-18 14:19:24,441 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-18 14:19:24,441 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-18 14:19:24,441 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-18 14:19:24,441 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2019-01-18 14:19:24,442 INFO L84 Accepts]: Finished accepts. word is accepted. [2019-01-18 14:19:24,442 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 8 states. [2019-01-18 14:19:24,454 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 10 edges. 10 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2019-01-18 14:19:24,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-18 14:19:24,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-18 14:19:24,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2019-01-18 14:19:24,456 INFO L87 Difference]: Start difference. First operand 9 states and 16 transitions. Second operand 8 states. [2019-01-18 14:19:24,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 14:19:24,713 INFO L93 Difference]: Finished difference Result 12 states and 22 transitions. [2019-01-18 14:19:24,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-18 14:19:24,713 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2019-01-18 14:19:24,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-18 14:19:24,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-01-18 14:19:24,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 15 transitions. [2019-01-18 14:19:24,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-01-18 14:19:24,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 15 transitions. [2019-01-18 14:19:24,716 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 7 states and 15 transitions. [2019-01-18 14:19:24,738 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 15 edges. 15 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2019-01-18 14:19:24,739 INFO L225 Difference]: With dead ends: 12 [2019-01-18 14:19:24,739 INFO L226 Difference]: Without dead ends: 0 [2019-01-18 14:19:24,740 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2019-01-18 14:19:24,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-01-18 14:19:24,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-01-18 14:19:24,740 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2019-01-18 14:19:24,740 INFO L82 GeneralOperation]: Start isEquivalent. First operand 0 states. Second operand 0 states. [2019-01-18 14:19:24,740 INFO L74 IsIncluded]: Start isIncluded. First operand 0 states. Second operand 0 states. [2019-01-18 14:19:24,741 INFO L87 Difference]: Start difference. First operand 0 states. Second operand 0 states. [2019-01-18 14:19:24,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 14:19:24,741 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2019-01-18 14:19:24,741 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-01-18 14:19:24,741 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-01-18 14:19:24,741 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2019-01-18 14:19:24,741 INFO L74 IsIncluded]: Start isIncluded. First operand 0 states. Second operand 0 states. [2019-01-18 14:19:24,741 INFO L87 Difference]: Start difference. First operand 0 states. Second operand 0 states. [2019-01-18 14:19:24,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-18 14:19:24,742 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2019-01-18 14:19:24,742 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-01-18 14:19:24,742 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-01-18 14:19:24,742 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2019-01-18 14:19:24,742 INFO L88 GeneralOperation]: Finished isEquivalent. [2019-01-18 14:19:24,742 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2019-01-18 14:19:24,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-01-18 14:19:24,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-01-18 14:19:24,742 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 5 [2019-01-18 14:19:24,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-18 14:19:24,743 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-01-18 14:19:24,743 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-18 14:19:24,743 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-01-18 14:19:24,743 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-01-18 14:19:24,747 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-01-18 14:19:24,974 WARN L181 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 28 [2019-01-18 14:19:24,980 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(lines 7 9) no Hoare annotation was computed. [2019-01-18 14:19:24,980 INFO L448 ceAbstractionStarter]: For program point L32(line 32) no Hoare annotation was computed. [2019-01-18 14:19:24,980 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(lines 7 9) no Hoare annotation was computed. [2019-01-18 14:19:24,981 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONASSERT(line 31) no Hoare annotation was computed. [2019-01-18 14:19:24,981 INFO L444 ceAbstractionStarter]: At program point L24-1(lines 23 29) the Hoare annotation is: (let ((.cse2 (select |#memory_int| ULTIMATE.start_main_p1))) (let ((.cse0 (let ((.cse3 (select (store |#memory_int| ULTIMATE.start_main_p2 (+ (select |#memory_int| ULTIMATE.start_main_p2) (- 1))) ULTIMATE.start_main_p1))) (or (and (not (= ULTIMATE.start_main_p1 ULTIMATE.start_main_p2)) (<= 1 .cse3)) (and (= .cse2 0) (= 0 .cse3))))) (.cse1 (select (store |#memory_int| ULTIMATE.start_main_p1 (+ .cse2 1)) ULTIMATE.start_main_p2))) (or (and .cse0 (= 0 .cse1)) (and .cse0 (<= (+ .cse1 1) 0))))) [2019-01-18 14:19:24,981 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONASSERT(line 32) no Hoare annotation was computed. [2019-01-18 14:19:24,981 INFO L448 ceAbstractionStarter]: For program point L14(lines 7 34) no Hoare annotation was computed. [2019-01-18 14:19:24,982 WARN L170 areAnnotationChecker]: ULTIMATE.startENTRY has no Hoare annotation [2019-01-18 14:19:24,982 WARN L170 areAnnotationChecker]: ULTIMATE.startErr0ASSERT_VIOLATIONASSERT has no Hoare annotation [2019-01-18 14:19:24,982 WARN L170 areAnnotationChecker]: L32 has no Hoare annotation [2019-01-18 14:19:24,986 WARN L170 areAnnotationChecker]: L32 has no Hoare annotation [2019-01-18 14:19:24,986 WARN L170 areAnnotationChecker]: L32 has no Hoare annotation [2019-01-18 14:19:24,986 WARN L170 areAnnotationChecker]: L14 has no Hoare annotation [2019-01-18 14:19:24,986 INFO L163 areAnnotationChecker]: CFG has 2 edges. 2 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. 0 times interpolants missing. [2019-01-18 14:19:24,996 INFO L202 PluginConnector]: Adding new model speedup-poc-dd-2-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.01 02:19:24 BoogieIcfgContainer [2019-01-18 14:19:24,996 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-01-18 14:19:24,998 INFO L168 Benchmark]: Toolchain (without parser) took 13259.10 ms. Allocated memory was 141.6 MB in the beginning and 305.7 MB in the end (delta: 164.1 MB). Free memory was 109.1 MB in the beginning and 275.5 MB in the end (delta: -166.4 MB). There was no memory consumed. Max. memory is 7.1 GB. [2019-01-18 14:19:24,999 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.17 ms. Allocated memory is still 141.6 MB. Free memory is still 110.3 MB. There was no memory consumed. Max. memory is 7.1 GB. [2019-01-18 14:19:24,999 INFO L168 Benchmark]: Boogie Procedure Inliner took 60.24 ms. Allocated memory is still 141.6 MB. Free memory was 108.9 MB in the beginning and 106.6 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. [2019-01-18 14:19:25,000 INFO L168 Benchmark]: Boogie Preprocessor took 25.67 ms. Allocated memory is still 141.6 MB. Free memory was 106.6 MB in the beginning and 105.4 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 7.1 GB. [2019-01-18 14:19:25,001 INFO L168 Benchmark]: RCFGBuilder took 486.90 ms. Allocated memory is still 141.6 MB. Free memory was 105.4 MB in the beginning and 94.3 MB in the end (delta: 11.1 MB). Peak memory consumption was 11.1 MB. Max. memory is 7.1 GB. [2019-01-18 14:19:25,001 INFO L168 Benchmark]: TraceAbstraction took 12680.74 ms. Allocated memory was 141.6 MB in the beginning and 305.7 MB in the end (delta: 164.1 MB). Free memory was 94.1 MB in the beginning and 275.5 MB in the end (delta: -181.4 MB). There was no memory consumed. Max. memory is 7.1 GB. [2019-01-18 14:19:25,005 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - GenericResult: Assertions are enabled Assertions are enabled - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.17 ms. Allocated memory is still 141.6 MB. Free memory is still 110.3 MB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 60.24 ms. Allocated memory is still 141.6 MB. Free memory was 108.9 MB in the beginning and 106.6 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 25.67 ms. Allocated memory is still 141.6 MB. Free memory was 106.6 MB in the beginning and 105.4 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 486.90 ms. Allocated memory is still 141.6 MB. Free memory was 105.4 MB in the beginning and 94.3 MB in the end (delta: 11.1 MB). Peak memory consumption was 11.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 12680.74 ms. Allocated memory was 141.6 MB in the beginning and 305.7 MB in the end (delta: 164.1 MB). Free memory was 94.1 MB in the beginning and 275.5 MB in the end (delta: -181.4 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 31]: assertion always holds For all program executions holds that assertion always holds at this location - PositiveResult [Line: 32]: assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: (((!(p1 == p2) && 1 <= #memory_int[p2 := #memory_int[p2] + -1][p1]) || (#memory_int[p1] == 0 && 0 == #memory_int[p2 := #memory_int[p2] + -1][p1])) && 0 == #memory_int[p1 := #memory_int[p1] + 1][p2]) || (((!(p1 == p2) && 1 <= #memory_int[p2 := #memory_int[p2] + -1][p1]) || (#memory_int[p1] == 0 && 0 == #memory_int[p2 := #memory_int[p2] + -1][p1])) && #memory_int[p1 := #memory_int[p1] + 1][p2] + 1 <= 0) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 2 error locations. SAFE Result, 12.6s OverallTime, 7 OverallIterations, 2 TraceHistogramMax, 1.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.2s HoareAnnotationTime, HoareTripleCheckerStatistics: 13 SDtfs, 32 SDslu, 1 SDs, 0 SdLazy, 155 SolverSat, 35 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 48 GetRequests, 6 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=10occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.2s AbstIntTime, 5 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 7 MinimizatonAttempts, 19 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 1 LocationsWithAnnotation, 1 PreInvPairs, 8 NumberOfFragments, 101 HoareAnnotationTreeSize, 1 FomulaSimplifications, 594 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 1 FomulaSimplificationsInter, 561 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 9.5s InterpolantComputationTime, 45 NumberOfCodeBlocks, 45 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 47 ConstructedInterpolants, 4 QuantifiedInterpolants, 1521 SizeOfPredicates, 11 NumberOfNonLiveVariables, 69 ConjunctsInSsa, 32 ConjunctsInUnsatCore, 17 InterpolantComputations, 4 PerfectInterpolantSequences, 9/30 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...