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-unlimited.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f57a05f [2019-01-07 21:33:06,784 INFO L170 SettingsManager]: Resetting all preferences to default values... [2019-01-07 21:33:06,786 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2019-01-07 21:33:06,804 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-01-07 21:33:06,853 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 [2019-01-07 21:33:06,870 INFO L110 SettingsManager]: Loading preferences was successful [2019-01-07 21:33:06,870 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2019-01-07 21:33:06,871 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2019-01-07 21:33:06,871 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2019-01-07 21:33:06,872 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-01-07 21:33:06,872 INFO L133 SettingsManager]: * User list type=DISABLED [2019-01-07 21:33:06,872 INFO L133 SettingsManager]: * Inline calls to unimplemented procedures=true [2019-01-07 21:33:06,872 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-01-07 21:33:06,872 INFO L133 SettingsManager]: * Explicit value domain=true [2019-01-07 21:33:06,873 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-01-07 21:33:06,873 INFO L133 SettingsManager]: * Octagon Domain=false [2019-01-07 21:33:06,873 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2019-01-07 21:33:06,873 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-01-07 21:33:06,873 INFO L133 SettingsManager]: * Interval Domain=false [2019-01-07 21:33:06,874 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-01-07 21:33:06,874 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2019-01-07 21:33:06,875 INFO L133 SettingsManager]: * Use SBE=true [2019-01-07 21:33:06,875 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-01-07 21:33:06,875 INFO L133 SettingsManager]: * sizeof long=4 [2019-01-07 21:33:06,875 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2019-01-07 21:33:06,876 INFO L133 SettingsManager]: * sizeof POINTER=4 [2019-01-07 21:33:06,876 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2019-01-07 21:33:06,876 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-01-07 21:33:06,876 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-01-07 21:33:06,876 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-01-07 21:33:06,877 INFO L133 SettingsManager]: * sizeof long double=12 [2019-01-07 21:33:06,877 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2019-01-07 21:33:06,877 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-01-07 21:33:06,877 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-01-07 21:33:06,877 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-01-07 21:33:06,878 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2019-01-07 21:33:06,878 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-01-07 21:33:06,878 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-01-07 21:33:06,878 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-01-07 21:33:06,879 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-01-07 21:33:06,879 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-01-07 21:33:06,879 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-01-07 21:33:06,879 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-01-07 21:33:06,879 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-01-07 21:33:06,880 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-01-07 21:33:06,930 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-01-07 21:33:06,946 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-01-07 21:33:06,952 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-01-07 21:33:06,953 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2019-01-07 21:33:06,954 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2019-01-07 21:33:06,955 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-2-unlimited.bpl [2019-01-07 21:33:06,955 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-2-unlimited.bpl' [2019-01-07 21:33:07,001 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-01-07 21:33:07,003 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-01-07 21:33:07,004 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-01-07 21:33:07,004 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-01-07 21:33:07,004 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2019-01-07 21:33:07,024 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 07.01 09:33:06" (1/1) ... [2019-01-07 21:33:07,040 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 07.01 09:33:06" (1/1) ... [2019-01-07 21:33:07,069 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-01-07 21:33:07,070 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-01-07 21:33:07,070 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-01-07 21:33:07,070 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2019-01-07 21:33:07,083 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 07.01 09:33:06" (1/1) ... [2019-01-07 21:33:07,084 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 07.01 09:33:06" (1/1) ... [2019-01-07 21:33:07,085 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 07.01 09:33:06" (1/1) ... [2019-01-07 21:33:07,085 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 07.01 09:33:06" (1/1) ... [2019-01-07 21:33:07,089 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 07.01 09:33:06" (1/1) ... [2019-01-07 21:33:07,094 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 07.01 09:33:06" (1/1) ... [2019-01-07 21:33:07,095 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 07.01 09:33:06" (1/1) ... [2019-01-07 21:33:07,096 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-01-07 21:33:07,097 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-01-07 21:33:07,097 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-01-07 21:33:07,097 INFO L276 PluginConnector]: RCFGBuilder initialized [2019-01-07 21:33:07,099 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 07.01 09:33:06" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-01-07 21:33:07,169 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-01-07 21:33:07,169 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-01-07 21:33:07,401 INFO L281 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-01-07 21:33:07,401 INFO L286 CfgBuilder]: Removed 7 assue(true) statements. [2019-01-07 21:33:07,404 INFO L202 PluginConnector]: Adding new model speedup-poc-dd-2-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.01 09:33:07 BoogieIcfgContainer [2019-01-07 21:33:07,405 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-01-07 21:33:07,406 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-01-07 21:33:07,406 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-01-07 21:33:07,410 INFO L276 PluginConnector]: TraceAbstraction initialized [2019-01-07 21:33:07,411 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 07.01 09:33:06" (1/2) ... [2019-01-07 21:33:07,412 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13355688 and model type speedup-poc-dd-2-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.01 09:33:07, skipping insertion in model container [2019-01-07 21:33:07,412 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 07.01 09:33:07" (2/2) ... [2019-01-07 21:33:07,414 INFO L112 eAbstractionObserver]: Analyzing ICFG speedup-poc-dd-2-unlimited.bpl [2019-01-07 21:33:07,425 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-01-07 21:33:07,435 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2019-01-07 21:33:07,453 INFO L257 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2019-01-07 21:33:07,487 INFO L382 AbstractCegarLoop]: Interprodecural is true [2019-01-07 21:33:07,487 INFO L383 AbstractCegarLoop]: Hoare is true [2019-01-07 21:33:07,488 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-01-07 21:33:07,488 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-01-07 21:33:07,488 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-01-07 21:33:07,488 INFO L387 AbstractCegarLoop]: Difference is false [2019-01-07 21:33:07,488 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-01-07 21:33:07,489 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-01-07 21:33:07,504 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2019-01-07 21:33:07,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2019-01-07 21:33:07,511 INFO L394 BasicCegarLoop]: Found error trace [2019-01-07 21:33:07,512 INFO L402 BasicCegarLoop]: trace histogram [1, 1] [2019-01-07 21:33:07,515 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-01-07 21:33:07,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 21:33:07,522 INFO L82 PathProgramCache]: Analyzing trace with hash 972, now seen corresponding path program 1 times [2019-01-07 21:33:07,524 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-07 21:33:07,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 21:33:07,576 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 21:33:07,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 21:33:07,577 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-07 21:33:07,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 21:33:07,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 21:33:07,701 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-07 21:33:07,701 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-01-07 21:33:07,702 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-07 21:33:07,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-01-07 21:33:07,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-01-07 21:33:07,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-07 21:33:07,720 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2019-01-07 21:33:07,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-07 21:33:07,876 INFO L93 Difference]: Finished difference Result 13 states and 15 transitions. [2019-01-07 21:33:07,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-07 21:33:07,889 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2019-01-07 21:33:07,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-07 21:33:07,908 INFO L225 Difference]: With dead ends: 13 [2019-01-07 21:33:07,911 INFO L226 Difference]: Without dead ends: 8 [2019-01-07 21:33:07,915 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 [2019-01-07 21:33:07,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2019-01-07 21:33:07,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 6. [2019-01-07 21:33:07,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-01-07 21:33:07,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 9 transitions. [2019-01-07 21:33:07,949 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 9 transitions. Word has length 2 [2019-01-07 21:33:07,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-07 21:33:07,950 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 9 transitions. [2019-01-07 21:33:07,950 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-01-07 21:33:07,950 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 9 transitions. [2019-01-07 21:33:07,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-07 21:33:07,951 INFO L394 BasicCegarLoop]: Found error trace [2019-01-07 21:33:07,951 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-07 21:33:07,951 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-01-07 21:33:07,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 21:33:07,952 INFO L82 PathProgramCache]: Analyzing trace with hash 29988, now seen corresponding path program 1 times [2019-01-07 21:33:07,952 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-07 21:33:07,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 21:33:07,953 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 21:33:07,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 21:33:07,953 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-07 21:33:07,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 21:33:08,069 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 21:33:08,069 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 21:33:08,070 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-07 21:33:08,071 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-07 21:33:08,072 INFO L207 CegarAbsIntRunner]: [0], [6], [11] [2019-01-07 21:33:08,111 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-07 21:33:08,112 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-07 21:33:08,219 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-07 21:33:08,221 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 24 root evaluator evaluations with a maximum evaluation depth of 2. Performed 24 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-07 21:33:08,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 21:33:08,229 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-07 21:33:08,230 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 21:33:08,230 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 [2019-01-07 21:33:08,250 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 21:33:08,251 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-07 21:33:08,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 21:33:08,292 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-07 21:33:08,350 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 [2019-01-07 21:33:08,406 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 [2019-01-07 21:33:08,408 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-07 21:33:08,471 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:33:08,491 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. [2019-01-07 21:33:08,491 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:9, output treesize:11 [2019-01-07 21:33:08,533 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:33:08,536 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 [2019-01-07 21:33:08,537 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 21:33:08,543 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:33:08,544 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:5 [2019-01-07 21:33:08,567 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 21:33:08,567 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-07 21:33:08,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 21:33:08,608 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-01-07 21:33:08,608 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 4 [2019-01-07 21:33:08,609 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-07 21:33:08,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-01-07 21:33:08,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-01-07 21:33:08,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-01-07 21:33:08,610 INFO L87 Difference]: Start difference. First operand 6 states and 9 transitions. Second operand 4 states. [2019-01-07 21:33:08,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-07 21:33:08,689 INFO L93 Difference]: Finished difference Result 10 states and 17 transitions. [2019-01-07 21:33:08,689 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-01-07 21:33:08,690 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2019-01-07 21:33:08,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-07 21:33:08,690 INFO L225 Difference]: With dead ends: 10 [2019-01-07 21:33:08,690 INFO L226 Difference]: Without dead ends: 9 [2019-01-07 21:33:08,692 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 [2019-01-07 21:33:08,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2019-01-07 21:33:08,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 7. [2019-01-07 21:33:08,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2019-01-07 21:33:08,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 13 transitions. [2019-01-07 21:33:08,696 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 13 transitions. Word has length 3 [2019-01-07 21:33:08,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-07 21:33:08,696 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 13 transitions. [2019-01-07 21:33:08,696 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-01-07 21:33:08,696 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 13 transitions. [2019-01-07 21:33:08,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-07 21:33:08,697 INFO L394 BasicCegarLoop]: Found error trace [2019-01-07 21:33:08,697 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-07 21:33:08,697 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-01-07 21:33:08,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 21:33:08,698 INFO L82 PathProgramCache]: Analyzing trace with hash 30050, now seen corresponding path program 1 times [2019-01-07 21:33:08,698 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-07 21:33:08,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 21:33:08,699 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 21:33:08,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 21:33:08,700 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-07 21:33:08,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 21:33:08,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 21:33:08,791 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 21:33:08,792 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-07 21:33:08,792 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-07 21:33:08,792 INFO L207 CegarAbsIntRunner]: [0], [8], [11] [2019-01-07 21:33:08,795 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-07 21:33:08,795 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-07 21:33:08,803 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-07 21:33:08,803 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 24 root evaluator evaluations with a maximum evaluation depth of 2. Performed 24 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-07 21:33:08,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 21:33:08,805 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-07 21:33:08,805 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 21:33:08,805 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 [2019-01-07 21:33:08,822 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 21:33:08,823 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-07 21:33:08,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 21:33:08,840 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-07 21:33:08,911 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 [2019-01-07 21:33:08,933 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 [2019-01-07 21:33:08,935 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-07 21:33:09,043 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:33:09,126 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 [2019-01-07 21:33:09,127 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-01-07 21:33:09,147 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:33:09,148 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:18, output treesize:15 [2019-01-07 21:33:09,184 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:33:09,185 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 [2019-01-07 21:33:09,186 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 21:33:09,200 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. [2019-01-07 21:33:09,200 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:11 [2019-01-07 21:33:09,271 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 21:33:09,272 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-07 21:33:09,303 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 21:33:09,321 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-07 21:33:09,321 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-07 21:33:09,322 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-07 21:33:09,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-07 21:33:09,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-07 21:33:09,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-07 21:33:09,323 INFO L87 Difference]: Start difference. First operand 7 states and 13 transitions. Second operand 6 states. [2019-01-07 21:33:09,471 WARN L181 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 17 [2019-01-07 21:33:09,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-07 21:33:09,612 INFO L93 Difference]: Finished difference Result 17 states and 27 transitions. [2019-01-07 21:33:09,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-07 21:33:09,613 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-07 21:33:09,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-07 21:33:09,614 INFO L225 Difference]: With dead ends: 17 [2019-01-07 21:33:09,615 INFO L226 Difference]: Without dead ends: 14 [2019-01-07 21:33:09,615 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-07 21:33:09,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-01-07 21:33:09,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 10. [2019-01-07 21:33:09,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2019-01-07 21:33:09,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 21 transitions. [2019-01-07 21:33:09,620 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 21 transitions. Word has length 3 [2019-01-07 21:33:09,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-07 21:33:09,621 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 21 transitions. [2019-01-07 21:33:09,621 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-07 21:33:09,621 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 21 transitions. [2019-01-07 21:33:09,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-07 21:33:09,621 INFO L394 BasicCegarLoop]: Found error trace [2019-01-07 21:33:09,621 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-07 21:33:09,622 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-01-07 21:33:09,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 21:33:09,622 INFO L82 PathProgramCache]: Analyzing trace with hash 929546, now seen corresponding path program 1 times [2019-01-07 21:33:09,622 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-07 21:33:09,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 21:33:09,623 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 21:33:09,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 21:33:09,624 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-07 21:33:09,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 21:33:09,688 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 21:33:09,689 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 21:33:09,689 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-07 21:33:09,689 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-07 21:33:09,689 INFO L207 CegarAbsIntRunner]: [0], [6], [8], [11] [2019-01-07 21:33:09,693 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-07 21:33:09,693 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-07 21:33:09,698 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-07 21:33:09,698 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 26 root evaluator evaluations with a maximum evaluation depth of 2. Performed 26 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-07 21:33:09,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 21:33:09,699 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-07 21:33:09,699 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 21:33:09,699 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 [2019-01-07 21:33:09,708 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 21:33:09,708 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-07 21:33:09,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 21:33:09,715 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-07 21:33:09,741 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 [2019-01-07 21:33:09,741 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 21:33:09,755 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 [2019-01-07 21:33:09,775 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 [2019-01-07 21:33:09,775 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-01-07 21:33:09,789 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:33:09,801 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:33:09,801 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:18, output treesize:15 [2019-01-07 21:33:09,844 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:33:09,845 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 [2019-01-07 21:33:09,846 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 21:33:09,897 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:33:09,898 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:11 [2019-01-07 21:33:09,935 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:33:09,940 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:33:09,941 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:33:09,943 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:33:09,944 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 [2019-01-07 21:33:09,945 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 21:33:09,997 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. [2019-01-07 21:33:09,997 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:11 [2019-01-07 21:33:10,096 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 21:33:10,097 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-07 21:33:10,404 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 21:33:10,423 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-07 21:33:10,424 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-07 21:33:10,424 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-07 21:33:10,424 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-07 21:33:10,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-07 21:33:10,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2019-01-07 21:33:10,425 INFO L87 Difference]: Start difference. First operand 10 states and 21 transitions. Second operand 8 states. [2019-01-07 21:33:10,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-07 21:33:10,606 INFO L93 Difference]: Finished difference Result 18 states and 31 transitions. [2019-01-07 21:33:10,607 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-07 21:33:10,607 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-07 21:33:10,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-07 21:33:10,607 INFO L225 Difference]: With dead ends: 18 [2019-01-07 21:33:10,608 INFO L226 Difference]: Without dead ends: 15 [2019-01-07 21:33:10,608 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2019-01-07 21:33:10,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-01-07 21:33:10,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 6. [2019-01-07 21:33:10,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-01-07 21:33:10,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 9 transitions. [2019-01-07 21:33:10,612 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 9 transitions. Word has length 4 [2019-01-07 21:33:10,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-07 21:33:10,612 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 9 transitions. [2019-01-07 21:33:10,613 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-07 21:33:10,613 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 9 transitions. [2019-01-07 21:33:10,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-07 21:33:10,613 INFO L394 BasicCegarLoop]: Found error trace [2019-01-07 21:33:10,613 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-07 21:33:10,614 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-01-07 21:33:10,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 21:33:10,614 INFO L82 PathProgramCache]: Analyzing trace with hash 931594, now seen corresponding path program 1 times [2019-01-07 21:33:10,614 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-07 21:33:10,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 21:33:10,615 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 21:33:10,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 21:33:10,616 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-07 21:33:10,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 21:33:10,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 21:33:10,650 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 21:33:10,650 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-07 21:33:10,651 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-07 21:33:10,651 INFO L207 CegarAbsIntRunner]: [0], [8], [12], [13] [2019-01-07 21:33:10,652 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-07 21:33:10,652 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-07 21:33:10,661 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-07 21:33:10,661 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 26 root evaluator evaluations with a maximum evaluation depth of 2. Performed 26 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-07 21:33:10,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 21:33:10,662 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-07 21:33:10,662 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 21:33:10,662 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 [2019-01-07 21:33:10,680 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 21:33:10,681 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-07 21:33:10,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 21:33:10,702 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-07 21:33:10,708 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 [2019-01-07 21:33:10,716 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 [2019-01-07 21:33:10,716 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-07 21:33:10,723 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:33:10,733 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. [2019-01-07 21:33:10,733 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:9, output treesize:11 [2019-01-07 21:33:10,753 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:33:10,754 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 [2019-01-07 21:33:10,755 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 21:33:10,760 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:33:10,760 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:5 [2019-01-07 21:33:10,781 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 21:33:10,781 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-07 21:33:10,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 21:33:10,814 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-01-07 21:33:10,814 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 5 [2019-01-07 21:33:10,815 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-07 21:33:10,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-01-07 21:33:10,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-01-07 21:33:10,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-01-07 21:33:10,816 INFO L87 Difference]: Start difference. First operand 6 states and 9 transitions. Second operand 4 states. [2019-01-07 21:33:10,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-07 21:33:10,898 INFO L93 Difference]: Finished difference Result 12 states and 17 transitions. [2019-01-07 21:33:10,898 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-01-07 21:33:10,899 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2019-01-07 21:33:10,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-07 21:33:10,899 INFO L225 Difference]: With dead ends: 12 [2019-01-07 21:33:10,899 INFO L226 Difference]: Without dead ends: 10 [2019-01-07 21:33:10,900 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 [2019-01-07 21:33:10,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2019-01-07 21:33:10,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 8. [2019-01-07 21:33:10,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-01-07 21:33:10,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 14 transitions. [2019-01-07 21:33:10,905 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 14 transitions. Word has length 4 [2019-01-07 21:33:10,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-07 21:33:10,905 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 14 transitions. [2019-01-07 21:33:10,905 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-01-07 21:33:10,905 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 14 transitions. [2019-01-07 21:33:10,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-07 21:33:10,906 INFO L394 BasicCegarLoop]: Found error trace [2019-01-07 21:33:10,906 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2019-01-07 21:33:10,907 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-01-07 21:33:10,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 21:33:10,907 INFO L82 PathProgramCache]: Analyzing trace with hash 28814048, now seen corresponding path program 1 times [2019-01-07 21:33:10,907 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-07 21:33:10,908 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 21:33:10,908 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 21:33:10,908 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 21:33:10,908 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-07 21:33:10,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 21:33:11,066 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-01-07 21:33:11,066 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-07 21:33:11,067 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-01-07 21:33:11,067 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-07 21:33:11,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-01-07 21:33:11,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-01-07 21:33:11,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-01-07 21:33:11,068 INFO L87 Difference]: Start difference. First operand 8 states and 14 transitions. Second operand 4 states. [2019-01-07 21:33:11,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-07 21:33:11,086 INFO L93 Difference]: Finished difference Result 11 states and 18 transitions. [2019-01-07 21:33:11,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-07 21:33:11,086 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2019-01-07 21:33:11,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-07 21:33:11,087 INFO L225 Difference]: With dead ends: 11 [2019-01-07 21:33:11,087 INFO L226 Difference]: Without dead ends: 9 [2019-01-07 21:33:11,088 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 [2019-01-07 21:33:11,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2019-01-07 21:33:11,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2019-01-07 21:33:11,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-01-07 21:33:11,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 16 transitions. [2019-01-07 21:33:11,095 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 16 transitions. Word has length 5 [2019-01-07 21:33:11,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-07 21:33:11,095 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 16 transitions. [2019-01-07 21:33:11,095 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-01-07 21:33:11,095 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 16 transitions. [2019-01-07 21:33:11,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-07 21:33:11,096 INFO L394 BasicCegarLoop]: Found error trace [2019-01-07 21:33:11,096 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-07 21:33:11,096 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2019-01-07 21:33:11,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 21:33:11,096 INFO L82 PathProgramCache]: Analyzing trace with hash 28873630, now seen corresponding path program 1 times [2019-01-07 21:33:11,097 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-07 21:33:11,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 21:33:11,098 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 21:33:11,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 21:33:11,098 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-07 21:33:11,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 21:33:11,162 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 21:33:11,163 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 21:33:11,163 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-07 21:33:11,164 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-07 21:33:11,164 INFO L207 CegarAbsIntRunner]: [0], [6], [8], [12], [13] [2019-01-07 21:33:11,166 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-07 21:33:11,166 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-07 21:33:11,170 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-07 21:33:11,170 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 28 root evaluator evaluations with a maximum evaluation depth of 2. Performed 28 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-07 21:33:11,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 21:33:11,171 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-07 21:33:11,171 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 21:33:11,171 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 [2019-01-07 21:33:11,179 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 21:33:11,180 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-07 21:33:11,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 21:33:11,185 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-07 21:33:11,207 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 [2019-01-07 21:33:11,208 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 21:33:11,221 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 [2019-01-07 21:33:11,226 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 [2019-01-07 21:33:11,227 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-01-07 21:33:11,240 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:33:11,244 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:33:11,245 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:18, output treesize:15 [2019-01-07 21:33:11,268 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:33:11,269 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 [2019-01-07 21:33:11,270 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 21:33:11,328 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 21:33:11,329 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:11 [2019-01-07 21:33:11,378 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:33:11,391 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:33:11,393 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:33:11,396 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 21:33:11,397 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 [2019-01-07 21:33:11,398 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 21:33:11,405 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. [2019-01-07 21:33:11,405 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:13 [2019-01-07 21:33:11,432 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 21:33:11,432 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-07 21:33:11,459 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 21:33:11,479 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-07 21:33:11,479 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-07 21:33:11,479 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-07 21:33:11,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-07 21:33:11,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-07 21:33:11,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2019-01-07 21:33:11,480 INFO L87 Difference]: Start difference. First operand 9 states and 16 transitions. Second operand 8 states. [2019-01-07 21:33:11,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-07 21:33:11,595 INFO L93 Difference]: Finished difference Result 12 states and 22 transitions. [2019-01-07 21:33:11,595 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-07 21:33:11,595 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2019-01-07 21:33:11,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-07 21:33:11,595 INFO L225 Difference]: With dead ends: 12 [2019-01-07 21:33:11,596 INFO L226 Difference]: Without dead ends: 0 [2019-01-07 21:33:11,596 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 [2019-01-07 21:33:11,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-01-07 21:33:11,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-01-07 21:33:11,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-01-07 21:33:11,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-01-07 21:33:11,597 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 5 [2019-01-07 21:33:11,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-07 21:33:11,597 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-01-07 21:33:11,597 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-07 21:33:11,597 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-01-07 21:33:11,597 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-01-07 21:33:11,601 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-01-07 21:33:11,963 WARN L181 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 28 [2019-01-07 21:33:11,966 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(lines 7 9) no Hoare annotation was computed. [2019-01-07 21:33:11,966 INFO L448 ceAbstractionStarter]: For program point L32(line 32) no Hoare annotation was computed. [2019-01-07 21:33:11,966 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONASSERT(line 32) no Hoare annotation was computed. [2019-01-07 21:33:11,967 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(lines 7 9) no Hoare annotation was computed. [2019-01-07 21:33:11,967 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))))) [2019-01-07 21:33:11,967 INFO L448 ceAbstractionStarter]: For program point L14(lines 7 34) no Hoare annotation was computed. [2019-01-07 21:33:11,967 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONASSERT(line 31) no Hoare annotation was computed. [2019-01-07 21:33:11,980 INFO L202 PluginConnector]: Adding new model speedup-poc-dd-2-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.01 09:33:11 BoogieIcfgContainer [2019-01-07 21:33:11,981 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-01-07 21:33:11,982 INFO L168 Benchmark]: Toolchain (without parser) took 4980.32 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 699.9 MB). Free memory was 1.5 GB in the beginning and 2.1 GB in the end (delta: -646.9 MB). Peak memory consumption was 53.0 MB. Max. memory is 7.1 GB. [2019-01-07 21:33:11,983 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2019-01-07 21:33:11,983 INFO L168 Benchmark]: Boogie Procedure Inliner took 65.70 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2019-01-07 21:33:11,984 INFO L168 Benchmark]: Boogie Preprocessor took 26.74 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2019-01-07 21:33:11,984 INFO L168 Benchmark]: RCFGBuilder took 307.81 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2019-01-07 21:33:11,985 INFO L168 Benchmark]: TraceAbstraction took 4575.00 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 699.9 MB). Free memory was 1.4 GB in the beginning and 2.1 GB in the end (delta: -668.0 MB). Peak memory consumption was 31.9 MB. Max. memory is 7.1 GB. [2019-01-07 21:33:11,989 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 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 65.70 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 26.74 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 307.81 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4575.00 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 699.9 MB). Free memory was 1.4 GB in the beginning and 2.1 GB in the end (delta: -668.0 MB). Peak memory consumption was 31.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 32]: assertion always holds For all program executions holds that assertion always holds at this location - PositiveResult [Line: 31]: 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, 4.4s 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, 1.2s 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, 101 HoareAnnotationTreeSize, 1 FomulaSimplifications, 594 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 1 FomulaSimplificationsInter, 561 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.3s 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...