java -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-9-limited.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-b7bd044-m [2019-01-20 10:10:28,501 INFO L170 SettingsManager]: Resetting all preferences to default values... [2019-01-20 10:10:28,503 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2019-01-20 10:10:28,515 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-01-20 10:10:28,515 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-01-20 10:10:28,516 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-01-20 10:10:28,518 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-01-20 10:10:28,520 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2019-01-20 10:10:28,522 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-01-20 10:10:28,523 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-01-20 10:10:28,524 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2019-01-20 10:10:28,550 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 [2019-01-20 10:10:28,563 INFO L110 SettingsManager]: Loading preferences was successful [2019-01-20 10:10:28,564 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2019-01-20 10:10:28,564 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2019-01-20 10:10:28,565 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2019-01-20 10:10:28,565 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-01-20 10:10:28,565 INFO L133 SettingsManager]: * User list type=DISABLED [2019-01-20 10:10:28,565 INFO L133 SettingsManager]: * Inline calls to unimplemented procedures=true [2019-01-20 10:10:28,566 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-01-20 10:10:28,566 INFO L133 SettingsManager]: * Explicit value domain=true [2019-01-20 10:10:28,566 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-01-20 10:10:28,566 INFO L133 SettingsManager]: * Octagon Domain=false [2019-01-20 10:10:28,566 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2019-01-20 10:10:28,567 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-01-20 10:10:28,567 INFO L133 SettingsManager]: * Interval Domain=false [2019-01-20 10:10:28,568 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-01-20 10:10:28,568 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2019-01-20 10:10:28,568 INFO L133 SettingsManager]: * Use SBE=true [2019-01-20 10:10:28,568 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-01-20 10:10:28,568 INFO L133 SettingsManager]: * sizeof long=4 [2019-01-20 10:10:28,569 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2019-01-20 10:10:28,569 INFO L133 SettingsManager]: * sizeof POINTER=4 [2019-01-20 10:10:28,569 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2019-01-20 10:10:28,569 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-01-20 10:10:28,569 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-01-20 10:10:28,569 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-01-20 10:10:28,570 INFO L133 SettingsManager]: * sizeof long double=12 [2019-01-20 10:10:28,570 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2019-01-20 10:10:28,570 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-01-20 10:10:28,570 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-01-20 10:10:28,571 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-01-20 10:10:28,571 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2019-01-20 10:10:28,571 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-01-20 10:10:28,571 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-01-20 10:10:28,571 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-01-20 10:10:28,572 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-01-20 10:10:28,572 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-01-20 10:10:28,572 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-01-20 10:10:28,572 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-01-20 10:10:28,572 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-01-20 10:10:28,572 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-01-20 10:10:28,601 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-01-20 10:10:28,613 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-01-20 10:10:28,617 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-01-20 10:10:28,618 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2019-01-20 10:10:28,619 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2019-01-20 10:10:28,619 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-9-limited.bpl [2019-01-20 10:10:28,620 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-9-limited.bpl' [2019-01-20 10:10:28,677 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-01-20 10:10:28,679 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-01-20 10:10:28,680 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-01-20 10:10:28,680 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-01-20 10:10:28,681 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2019-01-20 10:10:28,698 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "speedup-poc-dd-9-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 20.01 10:10:28" (1/1) ... [2019-01-20 10:10:28,712 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "speedup-poc-dd-9-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 20.01 10:10:28" (1/1) ... [2019-01-20 10:10:28,750 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-01-20 10:10:28,750 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-01-20 10:10:28,751 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-01-20 10:10:28,751 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2019-01-20 10:10:28,763 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "speedup-poc-dd-9-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 20.01 10:10:28" (1/1) ... [2019-01-20 10:10:28,763 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "speedup-poc-dd-9-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 20.01 10:10:28" (1/1) ... [2019-01-20 10:10:28,766 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "speedup-poc-dd-9-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 20.01 10:10:28" (1/1) ... [2019-01-20 10:10:28,767 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "speedup-poc-dd-9-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 20.01 10:10:28" (1/1) ... [2019-01-20 10:10:28,780 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "speedup-poc-dd-9-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 20.01 10:10:28" (1/1) ... [2019-01-20 10:10:28,789 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "speedup-poc-dd-9-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 20.01 10:10:28" (1/1) ... [2019-01-20 10:10:28,790 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "speedup-poc-dd-9-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 20.01 10:10:28" (1/1) ... [2019-01-20 10:10:28,792 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-01-20 10:10:28,797 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-01-20 10:10:28,798 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-01-20 10:10:28,800 INFO L276 PluginConnector]: RCFGBuilder initialized [2019-01-20 10:10:28,803 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "speedup-poc-dd-9-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 20.01 10:10:28" (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 [2019-01-20 10:10:28,876 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-01-20 10:10:28,877 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-01-20 10:10:29,329 INFO L281 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-01-20 10:10:29,330 INFO L286 CfgBuilder]: Removed 21 assue(true) statements. [2019-01-20 10:10:29,331 INFO L202 PluginConnector]: Adding new model speedup-poc-dd-9-limited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.01 10:10:29 BoogieIcfgContainer [2019-01-20 10:10:29,331 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-01-20 10:10:29,332 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-01-20 10:10:29,332 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-01-20 10:10:29,335 INFO L276 PluginConnector]: TraceAbstraction initialized [2019-01-20 10:10:29,336 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "speedup-poc-dd-9-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 20.01 10:10:28" (1/2) ... [2019-01-20 10:10:29,337 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6afb12ae and model type speedup-poc-dd-9-limited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.01 10:10:29, skipping insertion in model container [2019-01-20 10:10:29,337 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "speedup-poc-dd-9-limited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.01 10:10:29" (2/2) ... [2019-01-20 10:10:29,339 INFO L112 eAbstractionObserver]: Analyzing ICFG speedup-poc-dd-9-limited.bpl [2019-01-20 10:10:29,349 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-01-20 10:10:29,359 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 9 error locations. [2019-01-20 10:10:29,376 INFO L257 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2019-01-20 10:10:29,416 INFO L382 AbstractCegarLoop]: Interprodecural is true [2019-01-20 10:10:29,416 INFO L383 AbstractCegarLoop]: Hoare is true [2019-01-20 10:10:29,416 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-01-20 10:10:29,416 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-01-20 10:10:29,417 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-01-20 10:10:29,417 INFO L387 AbstractCegarLoop]: Difference is false [2019-01-20 10:10:29,417 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-01-20 10:10:29,418 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-01-20 10:10:29,438 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-01-20 10:10:29,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2019-01-20 10:10:29,453 INFO L394 BasicCegarLoop]: Found error trace [2019-01-20 10:10:29,454 INFO L402 BasicCegarLoop]: trace histogram [1, 1] [2019-01-20 10:10:29,457 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr8ASSERT_VIOLATIONASSERT]=== [2019-01-20 10:10:29,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:10:29,463 INFO L82 PathProgramCache]: Analyzing trace with hash 1000, now seen corresponding path program 1 times [2019-01-20 10:10:29,466 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-20 10:10:29,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:10:29,518 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:10:29,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:10:29,518 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-20 10:10:29,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:10:29,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:10:29,671 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-20 10:10:29,672 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-01-20 10:10:29,672 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-20 10:10:29,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-01-20 10:10:29,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-01-20 10:10:29,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-20 10:10:29,693 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 3 states. [2019-01-20 10:10:29,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-20 10:10:29,986 INFO L93 Difference]: Finished difference Result 41 states and 57 transitions. [2019-01-20 10:10:29,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-20 10:10:29,988 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2019-01-20 10:10:29,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-20 10:10:30,003 INFO L225 Difference]: With dead ends: 41 [2019-01-20 10:10:30,003 INFO L226 Difference]: Without dead ends: 36 [2019-01-20 10:10:30,006 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 [2019-01-20 10:10:30,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-01-20 10:10:30,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 20. [2019-01-20 10:10:30,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-01-20 10:10:30,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 37 transitions. [2019-01-20 10:10:30,064 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 37 transitions. Word has length 2 [2019-01-20 10:10:30,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-20 10:10:30,072 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 37 transitions. [2019-01-20 10:10:30,072 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-01-20 10:10:30,072 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 37 transitions. [2019-01-20 10:10:30,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-20 10:10:30,073 INFO L394 BasicCegarLoop]: Found error trace [2019-01-20 10:10:30,073 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-20 10:10:30,077 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr8ASSERT_VIOLATIONASSERT]=== [2019-01-20 10:10:30,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:10:30,077 INFO L82 PathProgramCache]: Analyzing trace with hash 30388, now seen corresponding path program 1 times [2019-01-20 10:10:30,078 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-20 10:10:30,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:10:30,081 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:10:30,081 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:10:30,081 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-20 10:10:30,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:10:30,267 WARN L181 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 13 [2019-01-20 10:10:30,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:10:30,334 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:10:30,334 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-20 10:10:30,335 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-20 10:10:30,337 INFO L207 CegarAbsIntRunner]: [0], [18], [39] [2019-01-20 10:10:30,377 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-20 10:10:30,377 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-20 10:10:30,461 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-20 10:10:30,462 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 110 root evaluator evaluations with a maximum evaluation depth of 3. Performed 110 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-20 10:10:30,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:10:30,469 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-20 10:10:30,469 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:10:30,469 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 [2019-01-20 10:10:30,488 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:10:30,489 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-20 10:10:30,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:10:30,528 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-20 10:10:30,954 WARN L181 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2019-01-20 10:10:30,990 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 30 treesize of output 33 [2019-01-20 10:10:31,033 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:31,036 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 39 [2019-01-20 10:10:31,076 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:31,082 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:31,084 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 49 [2019-01-20 10:10:31,116 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:31,118 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:31,120 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:31,122 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 63 [2019-01-20 10:10:31,164 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:31,166 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:31,168 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:31,170 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:31,173 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 81 [2019-01-20 10:10:31,209 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:31,213 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:31,221 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:31,223 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:31,226 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:31,229 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 103 [2019-01-20 10:10:31,254 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:31,258 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:31,260 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:31,262 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:31,265 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:31,270 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:31,272 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 129 [2019-01-20 10:10:31,293 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:31,294 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:31,299 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:31,323 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:31,325 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:31,329 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:31,331 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:31,334 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 159 [2019-01-20 10:10:31,356 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:31,375 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:31,381 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:31,383 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:31,385 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:31,388 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:31,390 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:31,391 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:31,394 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 36 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 190 [2019-01-20 10:10:31,397 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2019-01-20 10:10:31,947 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:32,126 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:32,229 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:32,358 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:32,447 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:32,479 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:32,509 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:32,540 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:32,654 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:32,655 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:32,658 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 95 [2019-01-20 10:10:32,679 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 77 [2019-01-20 10:10:32,686 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:32,687 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:32,741 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 78 [2019-01-20 10:10:32,822 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:32,847 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:32,871 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:32,893 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:32,916 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:32,930 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:32,932 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:32,932 INFO L303 Elim1Store]: Index analysis took 153 ms [2019-01-20 10:10:32,934 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 107 [2019-01-20 10:10:33,040 WARN L181 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2019-01-20 10:10:33,089 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:33,094 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:33,095 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:33,096 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:33,097 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:33,099 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:33,101 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:33,105 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:33,107 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-20 10:10:33,253 WARN L181 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2019-01-20 10:10:33,271 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:33,272 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:33,272 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:33,273 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:33,274 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:33,276 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:33,277 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:33,279 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:33,280 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:33,282 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:33,286 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-01-20 10:10:33,498 WARN L181 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-20 10:10:33,542 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:33,565 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:33,588 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:33,610 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:33,640 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:33,662 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:33,683 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:33,704 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:33,729 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:33,751 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:33,774 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:33,776 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:33,776 INFO L303 Elim1Store]: Index analysis took 275 ms [2019-01-20 10:10:33,778 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-01-20 10:10:33,779 INFO L267 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2019-01-20 10:10:33,785 INFO L267 ElimStorePlain]: Start of recursive call 16: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:33,788 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:33,790 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:33,810 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:33,833 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:33,841 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:10:33,884 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 2 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-20 10:10:33,885 INFO L202 ElimStorePlain]: Needed 17 recursive calls to eliminate 9 variables, input treesize:149, output treesize:70 [2019-01-20 10:10:33,978 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:33,979 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:33,980 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:33,981 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:33,982 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:33,983 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:33,985 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:33,988 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:33,989 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:33,990 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:33,992 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:33,994 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:33,996 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:33,998 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:34,000 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:34,003 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:34,005 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:34,007 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:34,009 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:34,011 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:34,013 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:34,014 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:34,016 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:34,017 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:34,019 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:34,020 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:34,022 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:34,023 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:34,025 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:34,026 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:34,028 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:34,029 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:34,031 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:34,033 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:34,035 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:34,036 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:34,037 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:10:34,040 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 9 select indices, 9 select index equivalence classes, 37 disjoint index pairs (out of 36 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 190 [2019-01-20 10:10:34,042 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:10:34,285 INFO L267 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 1 xjuncts. [2019-01-20 10:10:34,286 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 9 variables, input treesize:80, output treesize:70 [2019-01-20 10:10:37,167 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:10:37,167 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-20 10:10:37,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:10:37,230 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-20 10:10:37,230 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-20 10:10:37,231 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-20 10:10:37,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-20 10:10:37,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-20 10:10:37,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=31, Unknown=1, NotChecked=0, Total=56 [2019-01-20 10:10:37,232 INFO L87 Difference]: Start difference. First operand 20 states and 37 transitions. Second operand 6 states. [2019-01-20 10:11:00,061 WARN L194 Executor]: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) stderr output: (error "out of memory") [2019-01-20 10:11:00,063 FATAL L265 ToolchainWalker]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) Connection to SMT solver broken at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:123) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.pop(Scriptor.java:139) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.arrays.DiffWrapperScript.pop(DiffWrapperScript.java:102) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.managedscript.ManagedScript.pop(ManagedScript.java:131) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.unAssertPostcondition(IncrementalHoareTripleChecker.java:652) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.clearAssertionStack(IncrementalHoareTripleChecker.java:256) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.releaseLock(IncrementalHoareTripleChecker.java:271) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.ProtectiveHoareTripleChecker.releaseLock(ProtectiveHoareTripleChecker.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.EfficientHoareTripleChecker.releaseLock(EfficientHoareTripleChecker.java:164) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.CachingHoareTripleChecker.releaseLock(CachingHoareTripleChecker.java:202) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.switchToReadonlyMode(AbstractInterpolantAutomaton.java:141) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:715) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:628) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:472) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:376) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:334) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:126) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: java.io.IOException: Stream closed at java.lang.ProcessBuilder$NullOutputStream.write(ProcessBuilder.java:433) at java.io.OutputStream.write(OutputStream.java:116) at java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:82) at java.io.BufferedOutputStream.flush(BufferedOutputStream.java:140) at sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:297) at sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:141) at java.io.OutputStreamWriter.flush(OutputStreamWriter.java:229) at java.io.BufferedWriter.flush(BufferedWriter.java:254) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:120) ... 28 more [2019-01-20 10:11:00,067 INFO L168 Benchmark]: Toolchain (without parser) took 31388.44 ms. Allocated memory was 132.6 MB in the beginning and 256.9 MB in the end (delta: 124.3 MB). Free memory was 106.3 MB in the beginning and 212.7 MB in the end (delta: -106.3 MB). Peak memory consumption was 17.9 MB. Max. memory is 7.1 GB. [2019-01-20 10:11:00,068 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 132.6 MB. Free memory is still 107.8 MB. There was no memory consumed. Max. memory is 7.1 GB. [2019-01-20 10:11:00,069 INFO L168 Benchmark]: Boogie Procedure Inliner took 69.87 ms. Allocated memory is still 132.6 MB. Free memory was 106.3 MB in the beginning and 103.8 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 7.1 GB. [2019-01-20 10:11:00,070 INFO L168 Benchmark]: Boogie Preprocessor took 42.06 ms. Allocated memory is still 132.6 MB. Free memory was 103.8 MB in the beginning and 102.7 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 7.1 GB. [2019-01-20 10:11:00,070 INFO L168 Benchmark]: RCFGBuilder took 533.76 ms. Allocated memory is still 132.6 MB. Free memory was 102.5 MB in the beginning and 88.6 MB in the end (delta: 13.9 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. [2019-01-20 10:11:00,071 INFO L168 Benchmark]: TraceAbstraction took 30733.72 ms. Allocated memory was 132.6 MB in the beginning and 256.9 MB in the end (delta: 124.3 MB). Free memory was 88.4 MB in the beginning and 212.7 MB in the end (delta: -124.3 MB). There was no memory consumed. Max. memory is 7.1 GB. [2019-01-20 10:11:00,076 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 132.6 MB. Free memory is still 107.8 MB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 69.87 ms. Allocated memory is still 132.6 MB. Free memory was 106.3 MB in the beginning and 103.8 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 42.06 ms. Allocated memory is still 132.6 MB. Free memory was 103.8 MB in the beginning and 102.7 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 533.76 ms. Allocated memory is still 132.6 MB. Free memory was 102.5 MB in the beginning and 88.6 MB in the end (delta: 13.9 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 30733.72 ms. Allocated memory was 132.6 MB in the beginning and 256.9 MB in the end (delta: 124.3 MB). Free memory was 88.4 MB in the beginning and 212.7 MB in the end (delta: -124.3 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) Connection to SMT solver broken de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) Connection to SMT solver broken: de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:123) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...