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-2-limited.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-b7bd044-m [2019-01-20 10:01:14,448 INFO L170 SettingsManager]: Resetting all preferences to default values... [2019-01-20 10:01:14,450 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2019-01-20 10:01:14,465 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-01-20 10:01:14,523 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 10:01:14,546 INFO L110 SettingsManager]: Loading preferences was successful [2019-01-20 10:01:14,546 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2019-01-20 10:01:14,547 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2019-01-20 10:01:14,547 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2019-01-20 10:01:14,547 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-01-20 10:01:14,547 INFO L133 SettingsManager]: * User list type=DISABLED [2019-01-20 10:01:14,548 INFO L133 SettingsManager]: * Inline calls to unimplemented procedures=true [2019-01-20 10:01:14,548 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-01-20 10:01:14,548 INFO L133 SettingsManager]: * Explicit value domain=true [2019-01-20 10:01:14,548 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-01-20 10:01:14,549 INFO L133 SettingsManager]: * Octagon Domain=false [2019-01-20 10:01:14,549 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2019-01-20 10:01:14,549 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-01-20 10:01:14,549 INFO L133 SettingsManager]: * Interval Domain=false [2019-01-20 10:01:14,550 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-01-20 10:01:14,550 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2019-01-20 10:01:14,551 INFO L133 SettingsManager]: * Use SBE=true [2019-01-20 10:01:14,551 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-01-20 10:01:14,551 INFO L133 SettingsManager]: * sizeof long=4 [2019-01-20 10:01:14,551 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2019-01-20 10:01:14,551 INFO L133 SettingsManager]: * sizeof POINTER=4 [2019-01-20 10:01:14,552 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2019-01-20 10:01:14,552 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-01-20 10:01:14,552 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-01-20 10:01:14,552 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-01-20 10:01:14,552 INFO L133 SettingsManager]: * sizeof long double=12 [2019-01-20 10:01:14,553 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2019-01-20 10:01:14,553 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-01-20 10:01:14,553 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-01-20 10:01:14,553 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-01-20 10:01:14,554 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2019-01-20 10:01:14,554 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-01-20 10:01:14,554 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-01-20 10:01:14,554 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-01-20 10:01:14,555 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-01-20 10:01:14,555 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-01-20 10:01:14,555 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-01-20 10:01:14,555 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-01-20 10:01:14,556 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-01-20 10:01:14,556 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-01-20 10:01:14,589 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-01-20 10:01:14,601 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-01-20 10:01:14,607 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-01-20 10:01:14,609 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2019-01-20 10:01:14,610 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2019-01-20 10:01:14,610 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-2-limited.bpl [2019-01-20 10:01:14,612 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-2-limited.bpl' [2019-01-20 10:01:14,655 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-01-20 10:01:14,657 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-01-20 10:01:14,658 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-01-20 10:01:14,658 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-01-20 10:01:14,658 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2019-01-20 10:01:14,676 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "speedup-poc-dd-2-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 20.01 10:01:14" (1/1) ... [2019-01-20 10:01:14,689 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "speedup-poc-dd-2-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 20.01 10:01:14" (1/1) ... [2019-01-20 10:01:14,715 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-01-20 10:01:14,716 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-01-20 10:01:14,717 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-01-20 10:01:14,717 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2019-01-20 10:01:14,729 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "speedup-poc-dd-2-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 20.01 10:01:14" (1/1) ... [2019-01-20 10:01:14,729 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "speedup-poc-dd-2-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 20.01 10:01:14" (1/1) ... [2019-01-20 10:01:14,730 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "speedup-poc-dd-2-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 20.01 10:01:14" (1/1) ... [2019-01-20 10:01:14,730 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "speedup-poc-dd-2-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 20.01 10:01:14" (1/1) ... [2019-01-20 10:01:14,734 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "speedup-poc-dd-2-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 20.01 10:01:14" (1/1) ... [2019-01-20 10:01:14,738 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "speedup-poc-dd-2-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 20.01 10:01:14" (1/1) ... [2019-01-20 10:01:14,739 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "speedup-poc-dd-2-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 20.01 10:01:14" (1/1) ... [2019-01-20 10:01:14,741 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-01-20 10:01:14,741 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-01-20 10:01:14,741 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-01-20 10:01:14,742 INFO L276 PluginConnector]: RCFGBuilder initialized [2019-01-20 10:01:14,742 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "speedup-poc-dd-2-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 20.01 10:01:14" (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 10:01:14,801 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-01-20 10:01:14,801 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-01-20 10:01:15,029 INFO L281 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-01-20 10:01:15,029 INFO L286 CfgBuilder]: Removed 7 assue(true) statements. [2019-01-20 10:01:15,031 INFO L202 PluginConnector]: Adding new model speedup-poc-dd-2-limited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.01 10:01:15 BoogieIcfgContainer [2019-01-20 10:01:15,031 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-01-20 10:01:15,035 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-01-20 10:01:15,035 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-01-20 10:01:15,038 INFO L276 PluginConnector]: TraceAbstraction initialized [2019-01-20 10:01:15,039 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "speedup-poc-dd-2-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 20.01 10:01:14" (1/2) ... [2019-01-20 10:01:15,040 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@300ebef6 and model type speedup-poc-dd-2-limited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.01 10:01:15, skipping insertion in model container [2019-01-20 10:01:15,040 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "speedup-poc-dd-2-limited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.01 10:01:15" (2/2) ... [2019-01-20 10:01:15,042 INFO L112 eAbstractionObserver]: Analyzing ICFG speedup-poc-dd-2-limited.bpl [2019-01-20 10:01:15,052 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-01-20 10:01:15,061 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2019-01-20 10:01:15,078 INFO L257 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2019-01-20 10:01:15,113 INFO L382 AbstractCegarLoop]: Interprodecural is true [2019-01-20 10:01:15,113 INFO L383 AbstractCegarLoop]: Hoare is true [2019-01-20 10:01:15,113 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-01-20 10:01:15,113 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-01-20 10:01:15,114 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-01-20 10:01:15,114 INFO L387 AbstractCegarLoop]: Difference is false [2019-01-20 10:01:15,114 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-01-20 10:01:15,114 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-01-20 10:01:15,131 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2019-01-20 10:01:15,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2019-01-20 10:01:15,142 INFO L394 BasicCegarLoop]: Found error trace [2019-01-20 10:01:15,143 INFO L402 BasicCegarLoop]: trace histogram [1, 1] [2019-01-20 10:01:15,146 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-01-20 10:01:15,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:01:15,153 INFO L82 PathProgramCache]: Analyzing trace with hash 972, now seen corresponding path program 1 times [2019-01-20 10:01:15,156 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-20 10:01:15,211 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:01:15,211 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:01:15,211 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:01:15,211 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-20 10:01:15,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:01:15,346 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 10:01:15,347 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-20 10:01:15,348 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-01-20 10:01:15,348 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-20 10:01:15,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-01-20 10:01:15,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-01-20 10:01:15,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-20 10:01:15,366 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2019-01-20 10:01:15,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-20 10:01:15,498 INFO L93 Difference]: Finished difference Result 13 states and 15 transitions. [2019-01-20 10:01:15,499 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-20 10:01:15,500 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2019-01-20 10:01:15,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-20 10:01:15,515 INFO L225 Difference]: With dead ends: 13 [2019-01-20 10:01:15,515 INFO L226 Difference]: Without dead ends: 8 [2019-01-20 10:01:15,519 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 10:01:15,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2019-01-20 10:01:15,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 6. [2019-01-20 10:01:15,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-01-20 10:01:15,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 9 transitions. [2019-01-20 10:01:15,568 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 9 transitions. Word has length 2 [2019-01-20 10:01:15,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-20 10:01:15,569 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 9 transitions. [2019-01-20 10:01:15,569 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-01-20 10:01:15,569 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 9 transitions. [2019-01-20 10:01:15,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-20 10:01:15,570 INFO L394 BasicCegarLoop]: Found error trace [2019-01-20 10:01:15,570 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-20 10:01:15,570 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-01-20 10:01:15,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:01:15,571 INFO L82 PathProgramCache]: Analyzing trace with hash 29988, now seen corresponding path program 1 times [2019-01-20 10:01:15,571 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-20 10:01:15,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:01:15,572 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:01:15,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:01:15,573 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-20 10:01:15,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:01:15,658 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 10:01:15,659 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:01:15,659 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-20 10:01:15,660 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-20 10:01:15,663 INFO L207 CegarAbsIntRunner]: [0], [6], [11] [2019-01-20 10:01:15,708 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-20 10:01:15,708 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-20 10:01:15,779 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-20 10:01:15,780 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 26 root evaluator evaluations with a maximum evaluation depth of 3. Performed 26 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 10:01:15,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:01:15,787 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-20 10:01:15,787 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:01:15,787 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 10:01:15,798 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:01:15,798 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-20 10:01:15,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:01:15,819 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-20 10:01:15,877 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 [2019-01-20 10:01:15,890 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:01:15,893 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 [2019-01-20 10:01:15,894 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-20 10:01:15,916 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:01:15,934 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. [2019-01-20 10:01:15,935 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:13, output treesize:14 [2019-01-20 10:01:15,959 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:01:15,961 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:01:15,963 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 [2019-01-20 10:01:15,965 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:01:16,000 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. [2019-01-20 10:01:16,001 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:14 [2019-01-20 10:01:16,032 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 10:01:16,033 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-20 10:01:16,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:01:16,111 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-01-20 10:01:16,111 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 5 [2019-01-20 10:01:16,111 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-20 10:01:16,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-01-20 10:01:16,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-01-20 10:01:16,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-01-20 10:01:16,113 INFO L87 Difference]: Start difference. First operand 6 states and 9 transitions. Second operand 4 states. [2019-01-20 10:01:16,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-20 10:01:16,162 INFO L93 Difference]: Finished difference Result 10 states and 17 transitions. [2019-01-20 10:01:16,163 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-01-20 10:01:16,163 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2019-01-20 10:01:16,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-20 10:01:16,164 INFO L225 Difference]: With dead ends: 10 [2019-01-20 10:01:16,164 INFO L226 Difference]: Without dead ends: 9 [2019-01-20 10:01:16,164 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-01-20 10:01:16,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2019-01-20 10:01:16,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 7. [2019-01-20 10:01:16,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2019-01-20 10:01:16,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 13 transitions. [2019-01-20 10:01:16,170 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 13 transitions. Word has length 3 [2019-01-20 10:01:16,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-20 10:01:16,170 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 13 transitions. [2019-01-20 10:01:16,170 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-01-20 10:01:16,170 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 13 transitions. [2019-01-20 10:01:16,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-20 10:01:16,171 INFO L394 BasicCegarLoop]: Found error trace [2019-01-20 10:01:16,171 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-20 10:01:16,171 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-01-20 10:01:16,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:01:16,172 INFO L82 PathProgramCache]: Analyzing trace with hash 30050, now seen corresponding path program 1 times [2019-01-20 10:01:16,172 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-20 10:01:16,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:01:16,173 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:01:16,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:01:16,173 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-20 10:01:16,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:01:16,482 WARN L181 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 13 [2019-01-20 10:01:16,505 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 10:01:16,506 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:01:16,506 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-20 10:01:16,506 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-20 10:01:16,506 INFO L207 CegarAbsIntRunner]: [0], [8], [11] [2019-01-20 10:01:16,510 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-20 10:01:16,510 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-20 10:01:16,515 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-20 10:01:16,515 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 26 root evaluator evaluations with a maximum evaluation depth of 3. Performed 26 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 10:01:16,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:01:16,516 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-20 10:01:16,516 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:01:16,516 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 [2019-01-20 10:01:16,528 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:01:16,528 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-20 10:01:16,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:01:16,534 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-20 10:01:16,538 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 [2019-01-20 10:01:16,543 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:01:16,544 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 [2019-01-20 10:01:16,545 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-20 10:01:16,570 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:01:16,592 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:01:16,592 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:13, output treesize:14 [2019-01-20 10:01:16,614 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:01:16,616 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:01:16,618 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 [2019-01-20 10:01:16,619 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:01:16,635 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. [2019-01-20 10:01:16,635 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:14 [2019-01-20 10:01:16,665 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 10:01:16,665 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-20 10:01:16,707 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 10:01:16,725 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-20 10:01:16,725 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-20 10:01:16,725 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-20 10:01:16,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-20 10:01:16,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-20 10:01:16,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-20 10:01:16,727 INFO L87 Difference]: Start difference. First operand 7 states and 13 transitions. Second operand 6 states. [2019-01-20 10:01:16,955 WARN L181 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2019-01-20 10:01:16,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-20 10:01:16,992 INFO L93 Difference]: Finished difference Result 17 states and 27 transitions. [2019-01-20 10:01:16,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-20 10:01:16,993 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-20 10:01:16,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-20 10:01:16,994 INFO L225 Difference]: With dead ends: 17 [2019-01-20 10:01:16,994 INFO L226 Difference]: Without dead ends: 14 [2019-01-20 10:01:16,995 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-20 10:01:16,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-01-20 10:01:17,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 10. [2019-01-20 10:01:17,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2019-01-20 10:01:17,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 21 transitions. [2019-01-20 10:01:17,001 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 21 transitions. Word has length 3 [2019-01-20 10:01:17,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-20 10:01:17,001 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 21 transitions. [2019-01-20 10:01:17,001 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-20 10:01:17,001 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 21 transitions. [2019-01-20 10:01:17,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-20 10:01:17,002 INFO L394 BasicCegarLoop]: Found error trace [2019-01-20 10:01:17,002 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-20 10:01:17,003 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-01-20 10:01:17,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:01:17,003 INFO L82 PathProgramCache]: Analyzing trace with hash 929546, now seen corresponding path program 1 times [2019-01-20 10:01:17,003 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-20 10:01:17,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:01:17,004 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:01:17,005 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:01:17,005 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-20 10:01:17,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:01:17,206 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:01:17,206 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:01:17,206 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-20 10:01:17,206 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-20 10:01:17,207 INFO L207 CegarAbsIntRunner]: [0], [6], [8], [11] [2019-01-20 10:01:17,208 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-20 10:01:17,208 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-20 10:01:17,213 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-20 10:01:17,213 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 28 root evaluator evaluations with a maximum evaluation depth of 3. Performed 28 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-20 10:01:17,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:01:17,214 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-20 10:01:17,214 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:01:17,214 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 [2019-01-20 10:01:17,223 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:01:17,223 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-20 10:01:17,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:01:17,228 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-20 10:01:17,239 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 [2019-01-20 10:01:17,249 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:01:17,250 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 [2019-01-20 10:01:17,251 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-20 10:01:17,276 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:01:17,304 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:01:17,305 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:13, output treesize:14 [2019-01-20 10:01:17,327 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:01:17,330 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:01:17,331 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 [2019-01-20 10:01:17,332 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:01:17,431 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:01:17,432 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:14 [2019-01-20 10:01:17,648 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:01:17,650 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:01:17,652 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:01:17,654 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:01:17,655 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 [2019-01-20 10:01:17,656 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:01:17,695 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. [2019-01-20 10:01:17,695 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:14 [2019-01-20 10:01:17,722 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:01:17,722 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-20 10:01:17,760 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:01:17,779 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-20 10:01:17,779 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-20 10:01:17,779 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-20 10:01:17,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-20 10:01:17,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-20 10:01:17,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2019-01-20 10:01:17,781 INFO L87 Difference]: Start difference. First operand 10 states and 21 transitions. Second operand 8 states. [2019-01-20 10:01:17,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-20 10:01:17,919 INFO L93 Difference]: Finished difference Result 18 states and 31 transitions. [2019-01-20 10:01:17,920 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-20 10:01:17,920 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-20 10:01:17,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-20 10:01:17,921 INFO L225 Difference]: With dead ends: 18 [2019-01-20 10:01:17,921 INFO L226 Difference]: Without dead ends: 15 [2019-01-20 10:01:17,921 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2019-01-20 10:01:17,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-01-20 10:01:17,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 6. [2019-01-20 10:01:17,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-01-20 10:01:17,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 9 transitions. [2019-01-20 10:01:17,926 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 9 transitions. Word has length 4 [2019-01-20 10:01:17,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-20 10:01:17,926 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 9 transitions. [2019-01-20 10:01:17,926 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-20 10:01:17,926 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 9 transitions. [2019-01-20 10:01:17,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-20 10:01:17,927 INFO L394 BasicCegarLoop]: Found error trace [2019-01-20 10:01:17,927 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-20 10:01:17,927 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-01-20 10:01:17,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:01:17,928 INFO L82 PathProgramCache]: Analyzing trace with hash 931594, now seen corresponding path program 1 times [2019-01-20 10:01:17,928 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-20 10:01:17,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:01:17,929 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:01:17,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:01:17,929 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-20 10:01:17,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:01:18,052 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 10:01:18,052 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:01:18,052 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-20 10:01:18,053 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-20 10:01:18,053 INFO L207 CegarAbsIntRunner]: [0], [8], [12], [13] [2019-01-20 10:01:18,055 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-20 10:01:18,055 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-20 10:01:18,063 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-20 10:01:18,063 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 28 root evaluator evaluations with a maximum evaluation depth of 3. Performed 28 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 10:01:18,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:01:18,063 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-20 10:01:18,063 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:01:18,064 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 [2019-01-20 10:01:18,077 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:01:18,078 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-20 10:01:18,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:01:18,082 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-20 10:01:18,090 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 [2019-01-20 10:01:18,099 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 [2019-01-20 10:01:18,099 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-20 10:01:18,107 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:01:18,115 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. [2019-01-20 10:01:18,115 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:9, output treesize:11 [2019-01-20 10:01:18,122 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:01:18,124 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 [2019-01-20 10:01:18,124 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:01:18,127 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:01:18,128 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:5 [2019-01-20 10:01:18,146 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 10:01:18,146 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-20 10:01:18,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:01:18,187 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-01-20 10:01:18,187 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 5 [2019-01-20 10:01:18,187 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-20 10:01:18,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-01-20 10:01:18,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-01-20 10:01:18,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-01-20 10:01:18,188 INFO L87 Difference]: Start difference. First operand 6 states and 9 transitions. Second operand 4 states. [2019-01-20 10:01:18,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-20 10:01:18,219 INFO L93 Difference]: Finished difference Result 12 states and 17 transitions. [2019-01-20 10:01:18,219 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-01-20 10:01:18,219 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2019-01-20 10:01:18,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-20 10:01:18,220 INFO L225 Difference]: With dead ends: 12 [2019-01-20 10:01:18,220 INFO L226 Difference]: Without dead ends: 10 [2019-01-20 10:01:18,220 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-01-20 10:01:18,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2019-01-20 10:01:18,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 8. [2019-01-20 10:01:18,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-01-20 10:01:18,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 14 transitions. [2019-01-20 10:01:18,225 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 14 transitions. Word has length 4 [2019-01-20 10:01:18,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-20 10:01:18,225 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 14 transitions. [2019-01-20 10:01:18,225 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-01-20 10:01:18,226 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 14 transitions. [2019-01-20 10:01:18,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-20 10:01:18,226 INFO L394 BasicCegarLoop]: Found error trace [2019-01-20 10:01:18,226 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2019-01-20 10:01:18,227 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-01-20 10:01:18,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:01:18,227 INFO L82 PathProgramCache]: Analyzing trace with hash 28814048, now seen corresponding path program 1 times [2019-01-20 10:01:18,227 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-20 10:01:18,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:01:18,228 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:01:18,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:01:18,228 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-20 10:01:18,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:01:18,355 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-01-20 10:01:18,355 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-20 10:01:18,356 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-01-20 10:01:18,356 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-20 10:01:18,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-01-20 10:01:18,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-01-20 10:01:18,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-01-20 10:01:18,357 INFO L87 Difference]: Start difference. First operand 8 states and 14 transitions. Second operand 4 states. [2019-01-20 10:01:18,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-20 10:01:18,378 INFO L93 Difference]: Finished difference Result 11 states and 18 transitions. [2019-01-20 10:01:18,378 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-20 10:01:18,378 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2019-01-20 10:01:18,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-20 10:01:18,379 INFO L225 Difference]: With dead ends: 11 [2019-01-20 10:01:18,379 INFO L226 Difference]: Without dead ends: 9 [2019-01-20 10:01:18,380 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-01-20 10:01:18,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2019-01-20 10:01:18,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2019-01-20 10:01:18,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-01-20 10:01:18,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 16 transitions. [2019-01-20 10:01:18,386 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 16 transitions. Word has length 5 [2019-01-20 10:01:18,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-20 10:01:18,386 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 16 transitions. [2019-01-20 10:01:18,386 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-01-20 10:01:18,386 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 16 transitions. [2019-01-20 10:01:18,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-20 10:01:18,387 INFO L394 BasicCegarLoop]: Found error trace [2019-01-20 10:01:18,387 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-20 10:01:18,387 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-01-20 10:01:18,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:01:18,387 INFO L82 PathProgramCache]: Analyzing trace with hash 28873630, now seen corresponding path program 1 times [2019-01-20 10:01:18,387 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-20 10:01:18,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:01:18,388 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:01:18,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-20 10:01:18,389 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-20 10:01:18,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:01:18,567 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:01:18,567 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:01:18,567 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-20 10:01:18,567 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-20 10:01:18,567 INFO L207 CegarAbsIntRunner]: [0], [6], [8], [12], [13] [2019-01-20 10:01:18,569 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-20 10:01:18,569 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-20 10:01:18,573 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-20 10:01:18,573 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 30 root evaluator evaluations with a maximum evaluation depth of 3. Performed 30 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-20 10:01:18,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-20 10:01:18,574 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-20 10:01:18,575 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-20 10:01:18,575 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 [2019-01-20 10:01:18,594 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-20 10:01:18,594 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-20 10:01:18,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-20 10:01:18,601 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-20 10:01:18,607 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 [2019-01-20 10:01:18,610 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:01:18,611 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 [2019-01-20 10:01:18,611 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-20 10:01:18,625 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:01:18,630 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:01:18,631 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:13, output treesize:14 [2019-01-20 10:01:18,670 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:01:18,674 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:01:18,675 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 [2019-01-20 10:01:18,676 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:01:18,692 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-20 10:01:18,693 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:14 [2019-01-20 10:01:18,713 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:01:18,716 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:01:18,718 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:01:18,719 INFO L701 Elim1Store]: detected not equals via solver [2019-01-20 10:01:18,720 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 [2019-01-20 10:01:18,721 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-20 10:01:18,769 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. [2019-01-20 10:01:18,769 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:16 [2019-01-20 10:01:18,785 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:01:18,785 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-20 10:01:18,814 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-20 10:01:18,834 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-20 10:01:18,834 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 9 [2019-01-20 10:01:18,835 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-20 10:01:18,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-01-20 10:01:18,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-01-20 10:01:18,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2019-01-20 10:01:18,835 INFO L87 Difference]: Start difference. First operand 9 states and 16 transitions. Second operand 9 states. [2019-01-20 10:01:18,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-20 10:01:18,931 INFO L93 Difference]: Finished difference Result 12 states and 22 transitions. [2019-01-20 10:01:18,932 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-20 10:01:18,932 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 5 [2019-01-20 10:01:18,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-20 10:01:18,932 INFO L225 Difference]: With dead ends: 12 [2019-01-20 10:01:18,933 INFO L226 Difference]: Without dead ends: 0 [2019-01-20 10:01:18,933 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2019-01-20 10:01:18,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-01-20 10:01:18,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-01-20 10:01:18,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-01-20 10:01:18,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-01-20 10:01:18,934 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 5 [2019-01-20 10:01:18,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-20 10:01:18,934 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-01-20 10:01:18,934 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-01-20 10:01:18,934 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-01-20 10:01:18,934 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-01-20 10:01:18,938 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-01-20 10:01:19,266 WARN L181 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 27 [2019-01-20 10:01:19,269 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONASSERT(line 33) no Hoare annotation was computed. [2019-01-20 10:01:19,269 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(lines 7 9) no Hoare annotation was computed. [2019-01-20 10:01:19,269 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONASSERT(line 34) no Hoare annotation was computed. [2019-01-20 10:01:19,269 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(lines 7 9) no Hoare annotation was computed. [2019-01-20 10:01:19,269 INFO L444 ceAbstractionStarter]: At program point L26-1(lines 25 31) the Hoare annotation is: (let ((.cse0 (select (store |#memory_int| ULTIMATE.start_main_p1 (+ (select |#memory_int| ULTIMATE.start_main_p1) 1)) ULTIMATE.start_main_p2)) (.cse1 (let ((.cse3 (not (= ULTIMATE.start_main_p2 ULTIMATE.start_main_p1))) (.cse2 (select (store |#memory_int| ULTIMATE.start_main_p2 (+ (select |#memory_int| ULTIMATE.start_main_p2) (- 1))) ULTIMATE.start_main_p1))) (or (and (<= 1 .cse2) .cse3) (and .cse3 (= 0 .cse2)))))) (or (and (<= (+ .cse0 1) 0) .cse1) (and (= 0 .cse0) .cse1))) [2019-01-20 10:01:19,270 INFO L448 ceAbstractionStarter]: For program point L14(lines 7 36) no Hoare annotation was computed. [2019-01-20 10:01:19,270 INFO L448 ceAbstractionStarter]: For program point L34(line 34) no Hoare annotation was computed. [2019-01-20 10:01:19,280 INFO L202 PluginConnector]: Adding new model speedup-poc-dd-2-limited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.01 10:01:19 BoogieIcfgContainer [2019-01-20 10:01:19,280 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-01-20 10:01:19,281 INFO L168 Benchmark]: Toolchain (without parser) took 4625.36 ms. Allocated memory was 141.6 MB in the beginning and 221.2 MB in the end (delta: 79.7 MB). Free memory was 109.0 MB in the beginning and 117.5 MB in the end (delta: -8.5 MB). Peak memory consumption was 71.2 MB. Max. memory is 7.1 GB. [2019-01-20 10:01:19,282 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.18 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. [2019-01-20 10:01:19,283 INFO L168 Benchmark]: Boogie Procedure Inliner took 57.37 ms. Allocated memory is still 141.6 MB. Free memory was 108.8 MB in the beginning and 106.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2019-01-20 10:01:19,283 INFO L168 Benchmark]: Boogie Preprocessor took 24.48 ms. Allocated memory is still 141.6 MB. Free memory was 106.7 MB in the beginning and 105.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 7.1 GB. [2019-01-20 10:01:19,284 INFO L168 Benchmark]: RCFGBuilder took 289.67 ms. Allocated memory is still 141.6 MB. Free memory was 105.4 MB in the beginning and 96.2 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2019-01-20 10:01:19,285 INFO L168 Benchmark]: TraceAbstraction took 4245.51 ms. Allocated memory was 141.6 MB in the beginning and 221.2 MB in the end (delta: 79.7 MB). Free memory was 96.0 MB in the beginning and 117.5 MB in the end (delta: -21.5 MB). Peak memory consumption was 58.2 MB. Max. memory is 7.1 GB. [2019-01-20 10:01:19,289 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 0.18 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 57.37 ms. Allocated memory is still 141.6 MB. Free memory was 108.8 MB in the beginning and 106.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 24.48 ms. Allocated memory is still 141.6 MB. Free memory was 106.7 MB in the beginning and 105.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 289.67 ms. Allocated memory is still 141.6 MB. Free memory was 105.4 MB in the beginning and 96.2 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4245.51 ms. Allocated memory was 141.6 MB in the beginning and 221.2 MB in the end (delta: 79.7 MB). Free memory was 96.0 MB in the beginning and 117.5 MB in the end (delta: -21.5 MB). Peak memory consumption was 58.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 34]: assertion always holds For all program executions holds that assertion always holds at this location - PositiveResult [Line: 33]: 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: 25]: Loop Invariant Derived loop invariant: (#memory_int[p1 := #memory_int[p1] + 1][p2] + 1 <= 0 && ((1 <= #memory_int[p2 := #memory_int[p2] + -1][p1] && !(p2 == p1)) || (!(p2 == p1) && 0 == #memory_int[p2 := #memory_int[p2] + -1][p1]))) || (0 == #memory_int[p1 := #memory_int[p1] + 1][p2] && ((1 <= #memory_int[p2 := #memory_int[p2] + -1][p1] && !(p2 == p1)) || (!(p2 == p1) && 0 == #memory_int[p2 := #memory_int[p2] + -1][p1]))) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 2 error locations. SAFE Result, 4.1s OverallTime, 7 OverallIterations, 2 TraceHistogramMax, 0.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.3s HoareAnnotationTime, HoareTripleCheckerStatistics: 13 SDtfs, 34 SDslu, 1 SDs, 0 SdLazy, 161 SolverSat, 38 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 49 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1.6s 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, 0.1s AbstIntTime, 5 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 19 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 1 LocationsWithAnnotation, 1 PreInvPairs, 8 NumberOfFragments, 99 HoareAnnotationTreeSize, 1 FomulaSimplifications, 634 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 1 FomulaSimplificationsInter, 532 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 2.3s InterpolantComputationTime, 45 NumberOfCodeBlocks, 45 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 47 ConstructedInterpolants, 6 QuantifiedInterpolants, 1633 SizeOfPredicates, 5 NumberOfNonLiveVariables, 74 ConjunctsInSsa, 21 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...