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_array_oct.epf -i ../../../trunk/examples/programs/heapseparator/speedup-poc-dd-2-unlimited.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-df3cc4e-m [2019-01-11 11:41:59,784 INFO L170 SettingsManager]: Resetting all preferences to default values... [2019-01-11 11:41:59,786 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2019-01-11 11:41:59,801 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-01-11 11:41:59,801 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-01-11 11:41:59,803 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-01-11 11:41:59,805 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-01-11 11:41:59,808 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2019-01-11 11:41:59,811 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-01-11 11:41:59,812 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-01-11 11:41:59,814 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2019-01-11 11:41:59,846 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/array-bench/reach_32bit_array_oct.epf [2019-01-11 11:41:59,864 INFO L110 SettingsManager]: Loading preferences was successful [2019-01-11 11:41:59,864 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2019-01-11 11:41:59,867 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2019-01-11 11:41:59,867 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2019-01-11 11:41:59,867 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-01-11 11:41:59,867 INFO L133 SettingsManager]: * User list type=DISABLED [2019-01-11 11:41:59,868 INFO L133 SettingsManager]: * Inline calls to unimplemented procedures=true [2019-01-11 11:41:59,868 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-01-11 11:41:59,868 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-01-11 11:41:59,868 INFO L133 SettingsManager]: * Underlying domain=OctagonDomain [2019-01-11 11:41:59,868 INFO L133 SettingsManager]: * Abstract domain=ArrayDomain [2019-01-11 11:41:59,869 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-01-11 11:41:59,869 INFO L133 SettingsManager]: * Interval Domain=false [2019-01-11 11:41:59,869 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-01-11 11:41:59,870 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2019-01-11 11:41:59,871 INFO L133 SettingsManager]: * Use SBE=true [2019-01-11 11:41:59,871 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-01-11 11:41:59,871 INFO L133 SettingsManager]: * sizeof long=4 [2019-01-11 11:41:59,871 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2019-01-11 11:41:59,871 INFO L133 SettingsManager]: * sizeof POINTER=4 [2019-01-11 11:41:59,872 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2019-01-11 11:41:59,872 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-01-11 11:41:59,872 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-01-11 11:41:59,872 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-01-11 11:41:59,872 INFO L133 SettingsManager]: * sizeof long double=12 [2019-01-11 11:41:59,872 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2019-01-11 11:41:59,873 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-01-11 11:41:59,873 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-01-11 11:41:59,873 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-01-11 11:41:59,873 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2019-01-11 11:41:59,873 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:8192 -smt2 -in -t:2000 [2019-01-11 11:41:59,874 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-01-11 11:41:59,875 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-01-11 11:41:59,875 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-01-11 11:41:59,876 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-01-11 11:41:59,876 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-01-11 11:41:59,876 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:8192 -smt2 -in [2019-01-11 11:41:59,876 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-01-11 11:41:59,876 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-01-11 11:41:59,922 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-01-11 11:41:59,934 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-01-11 11:41:59,937 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-01-11 11:41:59,939 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2019-01-11 11:41:59,939 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2019-01-11 11:41:59,940 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-2-unlimited.bpl [2019-01-11 11:41:59,940 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-2-unlimited.bpl' [2019-01-11 11:41:59,976 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-01-11 11:41:59,978 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-01-11 11:41:59,979 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-01-11 11:41:59,979 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-01-11 11:41:59,979 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2019-01-11 11:41:59,995 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "speedup-poc-dd-2-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.01 11:41:59" (1/1) ... [2019-01-11 11:42:00,006 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "speedup-poc-dd-2-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.01 11:41:59" (1/1) ... [2019-01-11 11:42:00,029 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-01-11 11:42:00,030 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-01-11 11:42:00,030 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-01-11 11:42:00,030 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2019-01-11 11:42:00,040 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "speedup-poc-dd-2-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.01 11:41:59" (1/1) ... [2019-01-11 11:42:00,040 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "speedup-poc-dd-2-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.01 11:41:59" (1/1) ... [2019-01-11 11:42:00,041 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "speedup-poc-dd-2-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.01 11:41:59" (1/1) ... [2019-01-11 11:42:00,041 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "speedup-poc-dd-2-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.01 11:41:59" (1/1) ... [2019-01-11 11:42:00,045 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "speedup-poc-dd-2-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.01 11:41:59" (1/1) ... [2019-01-11 11:42:00,048 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "speedup-poc-dd-2-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.01 11:41:59" (1/1) ... [2019-01-11 11:42:00,049 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "speedup-poc-dd-2-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.01 11:41:59" (1/1) ... [2019-01-11 11:42:00,050 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-01-11 11:42:00,050 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-01-11 11:42:00,051 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-01-11 11:42:00,051 INFO L276 PluginConnector]: RCFGBuilder initialized [2019-01-11 11:42:00,051 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "speedup-poc-dd-2-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.01 11:41:59" (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:8192 -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:8192 -smt2 -in -t:2000 [2019-01-11 11:42:00,119 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-01-11 11:42:00,119 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-01-11 11:42:00,356 INFO L281 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-01-11 11:42:00,356 INFO L286 CfgBuilder]: Removed 7 assue(true) statements. [2019-01-11 11:42:00,358 INFO L202 PluginConnector]: Adding new model speedup-poc-dd-2-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 11:42:00 BoogieIcfgContainer [2019-01-11 11:42:00,358 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-01-11 11:42:00,359 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-01-11 11:42:00,359 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-01-11 11:42:00,363 INFO L276 PluginConnector]: TraceAbstraction initialized [2019-01-11 11:42:00,363 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "speedup-poc-dd-2-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.01 11:41:59" (1/2) ... [2019-01-11 11:42:00,365 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6901067d and model type speedup-poc-dd-2-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 11:42:00, skipping insertion in model container [2019-01-11 11:42:00,365 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "speedup-poc-dd-2-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 11:42:00" (2/2) ... [2019-01-11 11:42:00,368 INFO L112 eAbstractionObserver]: Analyzing ICFG speedup-poc-dd-2-unlimited.bpl [2019-01-11 11:42:00,379 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-01-11 11:42:00,390 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2019-01-11 11:42:00,407 INFO L257 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2019-01-11 11:42:00,444 INFO L382 AbstractCegarLoop]: Interprodecural is true [2019-01-11 11:42:00,445 INFO L383 AbstractCegarLoop]: Hoare is true [2019-01-11 11:42:00,445 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-01-11 11:42:00,445 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-01-11 11:42:00,445 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-01-11 11:42:00,445 INFO L387 AbstractCegarLoop]: Difference is false [2019-01-11 11:42:00,446 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-01-11 11:42:00,446 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-01-11 11:42:00,465 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2019-01-11 11:42:00,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2019-01-11 11:42:00,476 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 11:42:00,477 INFO L402 BasicCegarLoop]: trace histogram [1, 1] [2019-01-11 11:42:00,480 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-01-11 11:42:00,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:42:00,488 INFO L82 PathProgramCache]: Analyzing trace with hash 972, now seen corresponding path program 1 times [2019-01-11 11:42:00,490 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 11:42:00,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:42:00,540 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:42:00,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:42:00,540 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 11:42:00,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:42:00,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:42:00,693 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-11 11:42:00,693 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-01-11 11:42:00,693 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-11 11:42:00,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-01-11 11:42:00,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-01-11 11:42:00,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-11 11:42:00,714 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2019-01-11 11:42:00,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 11:42:00,889 INFO L93 Difference]: Finished difference Result 13 states and 15 transitions. [2019-01-11 11:42:00,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-11 11:42:00,892 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2019-01-11 11:42:00,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 11:42:00,907 INFO L225 Difference]: With dead ends: 13 [2019-01-11 11:42:00,907 INFO L226 Difference]: Without dead ends: 8 [2019-01-11 11:42:00,910 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 [2019-01-11 11:42:00,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2019-01-11 11:42:00,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 6. [2019-01-11 11:42:00,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-01-11 11:42:00,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 9 transitions. [2019-01-11 11:42:00,998 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 9 transitions. Word has length 2 [2019-01-11 11:42:01,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 11:42:01,001 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 9 transitions. [2019-01-11 11:42:01,001 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-01-11 11:42:01,002 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 9 transitions. [2019-01-11 11:42:01,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-11 11:42:01,002 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 11:42:01,002 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-11 11:42:01,006 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-01-11 11:42:01,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:42:01,009 INFO L82 PathProgramCache]: Analyzing trace with hash 29988, now seen corresponding path program 1 times [2019-01-11 11:42:01,009 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 11:42:01,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:42:01,010 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:42:01,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:42:01,011 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 11:42:01,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:42:01,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:42:01,148 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 11:42:01,148 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 11:42:01,149 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-11 11:42:01,151 INFO L207 CegarAbsIntRunner]: [0], [6], [11] [2019-01-11 11:42:01,207 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-11 11:42:01,208 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 11:42:02,120 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 11:42:02,122 INFO L272 AbstractInterpreter]: Visited 3 different actions 5 times. Merged at 1 different actions 1 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-11 11:42:02,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:42:02,128 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 11:42:02,129 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 11:42:02,129 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 [2019-01-11 11:42:02,146 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:42:02,147 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 11:42:02,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:42:02,177 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 11:42:02,310 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 [2019-01-11 11:42:02,352 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 [2019-01-11 11:42:02,352 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-11 11:42:02,373 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:42:02,425 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. [2019-01-11 11:42:02,425 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:9, output treesize:11 [2019-01-11 11:42:02,474 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:42:02,475 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 [2019-01-11 11:42:02,476 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 11:42:02,491 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:42:02,492 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:5 [2019-01-11 11:42:02,518 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:42:02,518 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 11:42:02,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:42:02,573 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-01-11 11:42:02,573 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 4 [2019-01-11 11:42:02,574 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-11 11:42:02,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-01-11 11:42:02,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-01-11 11:42:02,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-01-11 11:42:02,576 INFO L87 Difference]: Start difference. First operand 6 states and 9 transitions. Second operand 4 states. [2019-01-11 11:42:02,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 11:42:02,656 INFO L93 Difference]: Finished difference Result 10 states and 17 transitions. [2019-01-11 11:42:02,656 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-01-11 11:42:02,656 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2019-01-11 11:42:02,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 11:42:02,658 INFO L225 Difference]: With dead ends: 10 [2019-01-11 11:42:02,658 INFO L226 Difference]: Without dead ends: 9 [2019-01-11 11:42:02,659 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-01-11 11:42:02,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2019-01-11 11:42:02,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 7. [2019-01-11 11:42:02,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2019-01-11 11:42:02,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 13 transitions. [2019-01-11 11:42:02,662 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 13 transitions. Word has length 3 [2019-01-11 11:42:02,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 11:42:02,662 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 13 transitions. [2019-01-11 11:42:02,663 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-01-11 11:42:02,663 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 13 transitions. [2019-01-11 11:42:02,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-11 11:42:02,663 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 11:42:02,663 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-11 11:42:02,664 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-01-11 11:42:02,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:42:02,664 INFO L82 PathProgramCache]: Analyzing trace with hash 30050, now seen corresponding path program 1 times [2019-01-11 11:42:02,664 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 11:42:02,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:42:02,666 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:42:02,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:42:02,666 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 11:42:02,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:42:02,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:42:02,818 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 11:42:02,818 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 11:42:02,819 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-11 11:42:02,819 INFO L207 CegarAbsIntRunner]: [0], [8], [11] [2019-01-11 11:42:02,823 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-11 11:42:02,823 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 11:42:05,796 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 11:42:05,797 INFO L272 AbstractInterpreter]: Visited 3 different actions 11 times. Merged at 1 different actions 4 times. Widened at 1 different actions 1 times. Found 5 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-11 11:42:05,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:42:05,798 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 11:42:05,798 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 11:42:05,798 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 [2019-01-11 11:42:05,815 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:42:05,815 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 11:42:05,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:42:05,836 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 11:42:05,955 WARN L181 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2019-01-11 11:42:05,978 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2019-01-11 11:42:05,991 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 [2019-01-11 11:42:05,992 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-11 11:42:06,095 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:42:06,154 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2019-01-11 11:42:06,154 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-01-11 11:42:06,204 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:42:06,205 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:18, output treesize:15 [2019-01-11 11:42:06,249 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:42:06,250 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 [2019-01-11 11:42:06,251 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 11:42:06,300 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. [2019-01-11 11:42:06,300 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:11 [2019-01-11 11:42:06,444 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:42:06,444 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 11:42:06,473 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:42:06,492 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 11:42:06,493 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-11 11:42:06,493 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 11:42:06,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-11 11:42:06,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-11 11:42:06,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-11 11:42:06,494 INFO L87 Difference]: Start difference. First operand 7 states and 13 transitions. Second operand 6 states. [2019-01-11 11:42:06,656 WARN L181 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 17 [2019-01-11 11:42:06,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 11:42:06,723 INFO L93 Difference]: Finished difference Result 17 states and 27 transitions. [2019-01-11 11:42:06,724 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-11 11:42:06,724 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-11 11:42:06,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 11:42:06,725 INFO L225 Difference]: With dead ends: 17 [2019-01-11 11:42:06,725 INFO L226 Difference]: Without dead ends: 14 [2019-01-11 11:42:06,726 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-11 11:42:06,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-01-11 11:42:06,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 10. [2019-01-11 11:42:06,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2019-01-11 11:42:06,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 21 transitions. [2019-01-11 11:42:06,730 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 21 transitions. Word has length 3 [2019-01-11 11:42:06,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 11:42:06,730 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 21 transitions. [2019-01-11 11:42:06,730 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-11 11:42:06,730 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 21 transitions. [2019-01-11 11:42:06,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-11 11:42:06,731 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 11:42:06,731 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-11 11:42:06,731 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-01-11 11:42:06,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:42:06,731 INFO L82 PathProgramCache]: Analyzing trace with hash 929546, now seen corresponding path program 1 times [2019-01-11 11:42:06,732 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 11:42:06,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:42:06,733 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:42:06,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:42:06,733 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 11:42:06,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:42:06,819 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:42:06,820 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 11:42:06,820 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 11:42:06,820 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-11 11:42:06,820 INFO L207 CegarAbsIntRunner]: [0], [6], [8], [11] [2019-01-11 11:42:06,822 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-11 11:42:06,822 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 11:42:07,161 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 11:42:07,161 INFO L272 AbstractInterpreter]: Visited 4 different actions 7 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-11 11:42:07,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:42:07,162 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 11:42:07,162 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 11:42:07,162 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 [2019-01-11 11:42:07,179 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:42:07,180 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 11:42:07,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:42:07,198 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 11:42:07,269 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2019-01-11 11:42:07,269 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 11:42:07,281 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2019-01-11 11:42:07,284 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 [2019-01-11 11:42:07,285 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-01-11 11:42:07,293 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:42:07,301 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:42:07,302 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:18, output treesize:15 [2019-01-11 11:42:07,321 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:42:07,322 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 [2019-01-11 11:42:07,323 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 11:42:07,332 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:42:07,332 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:11 [2019-01-11 11:42:07,348 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:42:07,350 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:42:07,352 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:42:07,353 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:42:07,354 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 [2019-01-11 11:42:07,355 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 11:42:07,366 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. [2019-01-11 11:42:07,367 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:11 [2019-01-11 11:42:07,416 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:42:07,416 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 11:42:07,717 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:42:07,735 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 11:42:07,735 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-11 11:42:07,735 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 11:42:07,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-11 11:42:07,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-11 11:42:07,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2019-01-11 11:42:07,736 INFO L87 Difference]: Start difference. First operand 10 states and 21 transitions. Second operand 8 states. [2019-01-11 11:42:07,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 11:42:07,912 INFO L93 Difference]: Finished difference Result 18 states and 31 transitions. [2019-01-11 11:42:07,912 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-11 11:42:07,912 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-11 11:42:07,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 11:42:07,913 INFO L225 Difference]: With dead ends: 18 [2019-01-11 11:42:07,913 INFO L226 Difference]: Without dead ends: 15 [2019-01-11 11:42:07,914 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 [2019-01-11 11:42:07,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-01-11 11:42:07,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 6. [2019-01-11 11:42:07,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-01-11 11:42:07,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 9 transitions. [2019-01-11 11:42:07,919 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 9 transitions. Word has length 4 [2019-01-11 11:42:07,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 11:42:07,919 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 9 transitions. [2019-01-11 11:42:07,919 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-11 11:42:07,919 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 9 transitions. [2019-01-11 11:42:07,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-11 11:42:07,920 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 11:42:07,920 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-11 11:42:07,920 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-01-11 11:42:07,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:42:07,921 INFO L82 PathProgramCache]: Analyzing trace with hash 931594, now seen corresponding path program 1 times [2019-01-11 11:42:07,926 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 11:42:07,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:42:07,927 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:42:07,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:42:07,927 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 11:42:07,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:42:07,966 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:42:07,966 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 11:42:07,966 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 11:42:07,966 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-11 11:42:07,967 INFO L207 CegarAbsIntRunner]: [0], [8], [12], [13] [2019-01-11 11:42:07,968 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-11 11:42:07,968 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 11:42:09,937 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 11:42:09,937 INFO L272 AbstractInterpreter]: Visited 4 different actions 12 times. Merged at 1 different actions 4 times. Widened at 1 different actions 1 times. Found 5 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-11 11:42:09,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:42:09,937 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 11:42:09,937 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 11:42:09,938 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 [2019-01-11 11:42:09,946 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:42:09,946 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 11:42:09,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:42:09,951 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 11:42:09,954 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 [2019-01-11 11:42:09,959 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 [2019-01-11 11:42:09,959 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-11 11:42:09,965 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:42:09,976 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. [2019-01-11 11:42:09,976 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:9, output treesize:11 [2019-01-11 11:42:09,986 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:42:09,987 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 [2019-01-11 11:42:09,987 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 11:42:09,993 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:42:09,993 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:5 [2019-01-11 11:42:10,001 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:42:10,001 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 11:42:10,054 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:42:10,073 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-01-11 11:42:10,073 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 5 [2019-01-11 11:42:10,073 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-11 11:42:10,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-01-11 11:42:10,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-01-11 11:42:10,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-01-11 11:42:10,074 INFO L87 Difference]: Start difference. First operand 6 states and 9 transitions. Second operand 4 states. [2019-01-11 11:42:10,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 11:42:10,127 INFO L93 Difference]: Finished difference Result 12 states and 17 transitions. [2019-01-11 11:42:10,127 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-01-11 11:42:10,127 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2019-01-11 11:42:10,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 11:42:10,128 INFO L225 Difference]: With dead ends: 12 [2019-01-11 11:42:10,128 INFO L226 Difference]: Without dead ends: 10 [2019-01-11 11:42:10,128 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-01-11 11:42:10,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2019-01-11 11:42:10,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 8. [2019-01-11 11:42:10,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-01-11 11:42:10,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 14 transitions. [2019-01-11 11:42:10,132 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 14 transitions. Word has length 4 [2019-01-11 11:42:10,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 11:42:10,133 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 14 transitions. [2019-01-11 11:42:10,133 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-01-11 11:42:10,133 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 14 transitions. [2019-01-11 11:42:10,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-11 11:42:10,133 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 11:42:10,133 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2019-01-11 11:42:10,134 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-01-11 11:42:10,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:42:10,134 INFO L82 PathProgramCache]: Analyzing trace with hash 28814048, now seen corresponding path program 1 times [2019-01-11 11:42:10,134 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 11:42:10,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:42:10,135 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:42:10,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:42:10,135 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 11:42:10,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:42:10,184 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-01-11 11:42:10,185 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-11 11:42:10,185 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-01-11 11:42:10,185 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-11 11:42:10,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-01-11 11:42:10,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-01-11 11:42:10,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-01-11 11:42:10,186 INFO L87 Difference]: Start difference. First operand 8 states and 14 transitions. Second operand 4 states. [2019-01-11 11:42:10,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 11:42:10,217 INFO L93 Difference]: Finished difference Result 11 states and 18 transitions. [2019-01-11 11:42:10,217 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-11 11:42:10,218 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2019-01-11 11:42:10,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 11:42:10,218 INFO L225 Difference]: With dead ends: 11 [2019-01-11 11:42:10,219 INFO L226 Difference]: Without dead ends: 9 [2019-01-11 11:42:10,219 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-01-11 11:42:10,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2019-01-11 11:42:10,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2019-01-11 11:42:10,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-01-11 11:42:10,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 16 transitions. [2019-01-11 11:42:10,225 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 16 transitions. Word has length 5 [2019-01-11 11:42:10,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 11:42:10,225 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 16 transitions. [2019-01-11 11:42:10,225 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-01-11 11:42:10,225 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 16 transitions. [2019-01-11 11:42:10,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-11 11:42:10,226 INFO L394 BasicCegarLoop]: Found error trace [2019-01-11 11:42:10,226 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-11 11:42:10,226 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2019-01-11 11:42:10,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:42:10,226 INFO L82 PathProgramCache]: Analyzing trace with hash 28873630, now seen corresponding path program 1 times [2019-01-11 11:42:10,227 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-11 11:42:10,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:42:10,227 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:42:10,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-11 11:42:10,228 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-11 11:42:10,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:42:10,301 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:42:10,302 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 11:42:10,302 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-11 11:42:10,302 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-11 11:42:10,302 INFO L207 CegarAbsIntRunner]: [0], [6], [8], [12], [13] [2019-01-11 11:42:10,304 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-11 11:42:10,304 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-11 11:42:10,562 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-11 11:42:10,562 INFO L272 AbstractInterpreter]: Visited 5 different actions 8 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-11 11:42:10,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-11 11:42:10,562 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-11 11:42:10,563 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-11 11:42:10,563 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 [2019-01-11 11:42:10,583 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-11 11:42:10,583 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-11 11:42:10,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-11 11:42:10,589 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-11 11:42:10,601 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2019-01-11 11:42:10,601 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 11:42:10,609 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2019-01-11 11:42:10,611 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 [2019-01-11 11:42:10,612 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-01-11 11:42:10,622 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:42:10,634 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:42:10,635 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:18, output treesize:15 [2019-01-11 11:42:10,657 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:42:10,658 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 [2019-01-11 11:42:10,658 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 11:42:10,672 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-11 11:42:10,672 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:11 [2019-01-11 11:42:10,691 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:42:10,694 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:42:10,696 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:42:10,698 INFO L701 Elim1Store]: detected not equals via solver [2019-01-11 11:42:10,698 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 [2019-01-11 11:42:10,699 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-11 11:42:10,714 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. [2019-01-11 11:42:10,714 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:13 [2019-01-11 11:42:10,727 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:42:10,727 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-11 11:42:10,775 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-11 11:42:10,795 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-11 11:42:10,795 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-11 11:42:10,795 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-11 11:42:10,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-11 11:42:10,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-11 11:42:10,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2019-01-11 11:42:10,796 INFO L87 Difference]: Start difference. First operand 9 states and 16 transitions. Second operand 8 states. [2019-01-11 11:42:10,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-11 11:42:10,907 INFO L93 Difference]: Finished difference Result 12 states and 22 transitions. [2019-01-11 11:42:10,908 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-11 11:42:10,908 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2019-01-11 11:42:10,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-11 11:42:10,908 INFO L225 Difference]: With dead ends: 12 [2019-01-11 11:42:10,908 INFO L226 Difference]: Without dead ends: 0 [2019-01-11 11:42:10,909 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2019-01-11 11:42:10,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-01-11 11:42:10,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-01-11 11:42:10,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-01-11 11:42:10,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-01-11 11:42:10,909 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 5 [2019-01-11 11:42:10,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-11 11:42:10,909 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-01-11 11:42:10,910 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-11 11:42:10,910 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-01-11 11:42:10,910 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-01-11 11:42:10,914 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-01-11 11:42:11,239 WARN L181 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 28 [2019-01-11 11:42:11,241 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(lines 7 9) no Hoare annotation was computed. [2019-01-11 11:42:11,241 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONASSERT(line 31) no Hoare annotation was computed. [2019-01-11 11:42:11,241 INFO L448 ceAbstractionStarter]: For program point L32(line 32) no Hoare annotation was computed. [2019-01-11 11:42:11,241 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(lines 7 9) no Hoare annotation was computed. [2019-01-11 11:42:11,242 INFO L444 ceAbstractionStarter]: At program point L24-1(lines 23 29) the Hoare annotation is: (let ((.cse2 (select |#memory_int| ULTIMATE.start_main_p1))) (let ((.cse0 (let ((.cse3 (select (store |#memory_int| ULTIMATE.start_main_p2 (+ (select |#memory_int| ULTIMATE.start_main_p2) (- 1))) ULTIMATE.start_main_p1))) (or (and (not (= ULTIMATE.start_main_p1 ULTIMATE.start_main_p2)) (<= 1 .cse3)) (and (= .cse2 0) (= 0 .cse3))))) (.cse1 (select (store |#memory_int| ULTIMATE.start_main_p1 (+ .cse2 1)) ULTIMATE.start_main_p2))) (or (and .cse0 (= 0 .cse1)) (and .cse0 (<= (+ .cse1 1) 0))))) [2019-01-11 11:42:11,242 INFO L448 ceAbstractionStarter]: For program point L14(lines 7 34) no Hoare annotation was computed. [2019-01-11 11:42:11,242 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONASSERT(line 32) no Hoare annotation was computed. [2019-01-11 11:42:11,251 INFO L202 PluginConnector]: Adding new model speedup-poc-dd-2-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.01 11:42:11 BoogieIcfgContainer [2019-01-11 11:42:11,251 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-01-11 11:42:11,251 INFO L168 Benchmark]: Toolchain (without parser) took 11274.56 ms. Allocated memory was 140.5 MB in the beginning and 547.4 MB in the end (delta: 406.8 MB). Free memory was 108.0 MB in the beginning and 305.5 MB in the end (delta: -197.5 MB). Peak memory consumption was 209.3 MB. Max. memory is 7.1 GB. [2019-01-11 11:42:11,252 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 140.5 MB. Free memory is still 108.9 MB. There was no memory consumed. Max. memory is 7.1 GB. [2019-01-11 11:42:11,253 INFO L168 Benchmark]: Boogie Procedure Inliner took 51.15 ms. Allocated memory is still 140.5 MB. Free memory was 107.6 MB in the beginning and 105.8 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 7.1 GB. [2019-01-11 11:42:11,254 INFO L168 Benchmark]: Boogie Preprocessor took 20.03 ms. Allocated memory is still 140.5 MB. Free memory was 105.8 MB in the beginning and 104.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2019-01-11 11:42:11,254 INFO L168 Benchmark]: RCFGBuilder took 307.72 ms. Allocated memory is still 140.5 MB. Free memory was 104.5 MB in the beginning and 95.1 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2019-01-11 11:42:11,255 INFO L168 Benchmark]: TraceAbstraction took 10892.05 ms. Allocated memory was 140.5 MB in the beginning and 547.4 MB in the end (delta: 406.8 MB). Free memory was 95.1 MB in the beginning and 305.5 MB in the end (delta: -210.4 MB). Peak memory consumption was 196.4 MB. Max. memory is 7.1 GB. [2019-01-11 11:42:11,259 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 140.5 MB. Free memory is still 108.9 MB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 51.15 ms. Allocated memory is still 140.5 MB. Free memory was 107.6 MB in the beginning and 105.8 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 20.03 ms. Allocated memory is still 140.5 MB. Free memory was 105.8 MB in the beginning and 104.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 307.72 ms. Allocated memory is still 140.5 MB. Free memory was 104.5 MB in the beginning and 95.1 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 10892.05 ms. Allocated memory was 140.5 MB in the beginning and 547.4 MB in the end (delta: 406.8 MB). Free memory was 95.1 MB in the beginning and 305.5 MB in the end (delta: -210.4 MB). Peak memory consumption was 196.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 31]: assertion always holds For all program executions holds that assertion always holds at this location - PositiveResult [Line: 32]: assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: (((!(p1 == p2) && 1 <= #memory_int[p2 := #memory_int[p2] + -1][p1]) || (#memory_int[p1] == 0 && 0 == #memory_int[p2 := #memory_int[p2] + -1][p1])) && 0 == #memory_int[p1 := #memory_int[p1] + 1][p2]) || (((!(p1 == p2) && 1 <= #memory_int[p2 := #memory_int[p2] + -1][p1]) || (#memory_int[p1] == 0 && 0 == #memory_int[p2 := #memory_int[p2] + -1][p1])) && #memory_int[p1 := #memory_int[p1] + 1][p2] + 1 <= 0) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 2 error locations. SAFE Result, 10.8s OverallTime, 7 OverallIterations, 2 TraceHistogramMax, 0.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.3s HoareAnnotationTime, HoareTripleCheckerStatistics: 13 SDtfs, 31 SDslu, 1 SDs, 0 SdLazy, 175 SolverSat, 35 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 48 GetRequests, 6 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1.4s 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, 6.5s 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, 101 HoareAnnotationTreeSize, 1 FomulaSimplifications, 594 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 1 FomulaSimplificationsInter, 561 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.4s InterpolantComputationTime, 45 NumberOfCodeBlocks, 45 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 47 ConstructedInterpolants, 4 QuantifiedInterpolants, 1521 SizeOfPredicates, 11 NumberOfNonLiveVariables, 69 ConjunctsInSsa, 32 ConjunctsInUnsatCore, 17 InterpolantComputations, 4 PerfectInterpolantSequences, 9/30 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...